• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    injection device. The injection device for use when injecting a fluid into a target location comprises a housing and a valve assembly located within the housing. the housing defines an inlet to communicate with an injection line, an outlet to communicate with a target location and an injection fluid flow path extending between the inlet and outlet. the localized valve assembly is configured to control the flow of injection fluid along the flow path and comprises the first and second valve members both arranged to move within the housing, characterized by the fact that, in an open configuration , to allow flow, the first and second members are disengaged and, in a closed configuration to prevent flow, the first and second members are engaged and the first valve member is tilted against the second member by inlet fluid pressure to assist the sealing between them.
    公开号:BR112013025868B1
    申请号:R112013025868-3
    申请日:2012-04-05
    公开日:2021-03-23
    发明作者:Keith Donald Woodford
    申请人:Tco As；
    IPC主号:
    专利说明:

    [0001] The present invention relates to an injection device for use by allowing the injection of a fluid in a well location. BACKGROUND OF THE INVENTION
    [0002] Many well completions include a means of injecting chemicals into the well orifice at one point on completion for the purposes of corrosion reduction, fouling reduction, hydrate reduction, Ipoço stimulation, a variety of optimization strategies or the like. A typical installation will include a chemical injection line that runs from a surface chemical injection pump system, along a production pipeline to terminate at a pit location to allow a chemical injected to from the surface to be dosed in the production pipe, formation or other desired location.
    [0003] The fluid within the injection line will be subject to hydrostatic pressure, which can often be significant in deeper wells. If that hydrostatic pressure exceeds the pressure inside the production pipeline (which can occur in a depleting well orifice, a well orifice subject to artificial elevation or the like), in addition to any other resistance associated with the injection fluid, then the result it can be the undesirable flow or cascade of the injection fluid to the production pipeline. This effect can be called "hydrostatic drop". If not verified, such a hydrostatic drop will occur until the hydrostatic pressure within the injection line is in equilibrium with the pressure in the production pipeline is another flow resistance. If the injection fluid has not been continuously replenished during such a cascade flow, which may be the case when the injection pumps are inoperative, then the result will be the creation of a vacuum in the upper region of the injection line. Such a vacuum can present the injection line to adverse mechanical forces and stresses, such as radial collapse forces. Furthermore, the established vacuum can be defined by a pressure that is lower than the vapor pressure of the injection fluid, thus causing the injection fluid to boil. This can be compounded by the effect of the increased temperatures associated with well orifice environments.
    [0004] The consequence of the occurrence of a vacuum in the chemical injection lines is that the original fluid may not be able to retain its intended state and its fluid carrier will boil. This has the potential for many adverse effects, such as, solid deposit, viscosity change, crystal formation, wax, partial or total solidification, and the like.
    [0005] In order to address the problems defined above, it is known in the art to use an appropriate injection valve close to the injection point in the production pipeline, in which the valve seeks to maintain a positive pressure within the total height of the injection line. A known injection valve includes a housing with a valve assembly that allows the flow from an inlet to an outlet to be adjustable. The flow is initiated when the inlet pressure exceeds a limit, and during the flow the valve defines a flow restriction that establishes a back pressure on the inlet side and, thus, within the injection line.
    [0006] A portion of a known injection valve 1 is shown in Figure 1. A housing 2 defines an inlet 3 and an outlet 4 and a valve assembly 5 is positioned between them. The valve assembly includes a ball 6 which is arranged to cooperate with a seat j7, in which flow is impeded when the ball 6 is engaged with the seat 7 and allowed when disengaged. When the ball 6 is closed in front of the seat 7, the inlet pressure will act on the ball / seat sealing area 8 defined thus applying a force in one direction to raise the ball 6 from the seat 7, considering that the outlet pressure will act over the sealing area 8 on an opposite side, thus applying a force in one direction to engage the ball 6 against the seat 7. The known injection valve 1 includes a spring member 9 which applies a tilting force against the ball 6 in one direction to close the ball 6 against the seat 7. The appropriate selection of the spring force may allow for an appropriate resistance back pressure rating of the device 1 to be achieved.
    [0007] The net force applied to the sphere can be expressed by: FN = FIP- (FOP + FS) where: Fn = net force FIP = force generated on the sealing area 24 by the inlet pressure FOP = force generated on the sealing area 24 by the outlet pressure FS = spring force
    [0008] At all times, the force generated by the FIP inlet pressure will act to disengage the ball 6 from the seat 7. Correspondingly, for the flow to occur, the net force FN must be positive so that the value of the force generated by the pressure of Fip inlet must be greater than the sum of the force generated by the outlet pressure and the spring (FOP + FS). During flow, ball 6 will continually adjust to seek balance of force, thus working to modify the flow restriction between ball 6 and seat 7 and regulate the flow that inherently allows positive pressure to be maintained within the injection line. This positive pressure will be a function of the spring force FS.
    [0009] When the sum of the output pressure force and spring force (FOP + FS) exceeds the input pressure force FIP, ball 6 will be moved in one direction to fit seat 7, with the expectation that a seal will occur upon fitting. However, the moment the combined forces generated by the outlet and spring pressure (FOP + FS) exceed the force generated by the FIP inlet pressure, the differential force or net force FN acting to close and maintain the ball 6 in a sealing fit. with seat 7 it will be extremely small. Such small force may be insufficient to prevent leakage, specifically where the surfaces of ball 6 and seat 7 become contaminated. Such leakage can result in pressure reduction within the injection line and possible creation of a vacuum, which must be avoided.
    [0010] Furthermore, as the fluid pressure acts on the sealing area 8 to facilitate the movement of the ball 6, then, in order to generate sufficient forces, the area 8 must be relatively large. The provision of such a large area can present problems, for example, in making it difficult to create a fence over such a large area, when required. To accommodate the seal, highly accurate components must be used, which can be expensive. In addition, a larger sealing area will result in a potentially larger flow area when ball 6 is raised from seat 7, which can lead to sensitivity issues so that a very large variation in flow rates will occur over only a very small variation in the movement of the ball 6 relative to the seat 7.
    [0011] Likewise, a larger sealing area can become more susceptible to contamination.
    [0012] Pressure-sensitive equipment, such as the known injection valve 10 described above, is typically installed with a degree of protection that isolates sensitive equipment components from well orifice pressure and conditions until installation is complete. Such protection may include rupture discs or rupture cartridges. However, when such protective components are eventually ruptured by high pressures, a surge in flow can be created which can cause the ball 6 to be aggressively high and re-engage with the seat 7 resulting in possible damage. Sphere 6 and / or seat 7 are typically formed from fragile materials, such as sapphire, ruby, ceramic, carbide, hard metals or the like that can break during such an outbreak event. SUMMARY OF THE INVENTION
    [0013] In accordance with a first aspect of the present invention, an injection device is provided for use when injecting a fluid at a target site, comprising: a housing defining an inlet to communicate with an injection line, an outlet to communicate with a target location and an injection fluid flow path extending between the inlet and the outlet; and a valve assembly located inside the housing and configured to control the flow of injection fluid along the flow path
    [0014] wherein the valve assembly comprises the first and second valve members both arranged to move within the housing, where, in an open configuration to allow flow, the first and second members are disengaged, and in a closed configuration for to prevent flow, the first and second members are engaged and the first valve member is tilted against the second member by inlet fluid pressure to assist sealing between them.
    [0015] The valve assembly can be configured to maintain fluid pressure on the inlet side of the valve assembly above the fluid pressure on the outlet side of the valve assembly.
    [0016] In at least one mode of operation, the valve assembly may function to maintain the inlet fluid pressure above the outlet fluid pressure. This can help prevent or minimize the risk of an associated injection line in communication with the inlet from being exposed to negative pressure.
    [0017] The present invention allows the use of inlet pressure to assist sealing between the first and second valve members when in the closed configuration, as noted above. Inlet pressure may be allowed to establish a tilt force on the first valve member to assist sealing by virtue of the fact that the first valve member is movable within the housing. As such, the effects of inlet fluid pressure can be experienced by the first valve member, which would not otherwise be the case if the first valve member were fixed.
    [0018] The use of the inlet pressure to assist the seal can allow the improved seal to be achieved by fitting the first and second valve members, minimizing the risk of leakage between them. This, in turn, can, in some applications, minimize the possibility of an associated injection line in communication with the inlet housing being exposed to vacuum or negative pressure conditions, for example, due to hydrostatic drop.
    [0019] The injection device can be configured for use in the injection at a target drilling location. The target location can be associated with the well orifice equipment or infrastructure. The target location can be associated with the production pipeline or equipment.
    [0020] The inlet fluid pressure within the injection device can be at least partially defined by the fluid pressure within an associated injection line. The outlet fluid pressure can be at least partially defined by the fluid pressure at an associated target location.
    [0021] The valve assembly can be opened when the pressure differential between the inlet and outlet exceeds a predetermined value, and closed when the pressure differential between the inlet and outlet falls below a predetermined value. In this way, when the inlet pressure reduces, for example, during the ceased injection (which can be established by deactivating an injection pump), the first and second valve members can become engaged to prevent flow, with the inlet pressure then assisting the sealing between them. Conversely, when the inlet pressure increases, for example, when the injection is started (which can be achieved by activating an injection pump), the first and second valve members can disengage to allow flow.
    [0022] The valve assembly can be configured so that the first and second valve members define a flow restriction when disengaged. This can establish a back pressure! on the inlet side helping to keep the inlet pressure above the outlet pressure. The degree of separation between the first and second valve members can be adjusted to adjust the flow restriction. The degree of separation can be adjusted automatically to keep the inlet pressure above the outlet pressure. Such automatic adjustment can be achieved by the desire for the valve assembly to continuously satisfy the force balance. In such a case: the force balance can allow the desired pressure differential to be maintained. As such, any instability, for example, due to moving inlet and outlet pressures or flow rate will be automatically adjusted.
    [0023] The second valve member can be configured to support the first valve member when engaged with it. In such an arrangement, the movement of the second valve member when engaged with the first valve member will result in the movement of both members. This arrangement may allow the valve assembly to remain closed in the event of such a collective movement of the valve members. This can help to regulate or minimize the effects of artificial or unwanted pressure fluctuations that may otherwise cause inadvertent disengagement of the limbs. Such unwanted pressure fluctuations may be transient or transient and are not intended to represent operating pressure fluctuations. For example, transient pressure fluctuations can be created by flow surges.
    [0024] The first valve member can be located on an inlet side of the valve assembly, and the second valve member can be located on an outlet side of the valve assembly. Correspondingly, the first valve member can be located in an upstream position and the second valve member can be located in a downstream position. This arrangement can facilitate the use of inlet fluid pressure to tilt the first valve member against the second valve member.
    [0025] Each valve member can define a fitting surface configured to be mutually engaged when the valve assembly is in a closed configuration. Each interlocking surface can define a sealing surface.
    [0026] The first and second valve members can define a sealing area in the fitting region. When the first and second valve members are engaged, the inlet fluid pressure can act on one side, which can be defined as a side upstream of the sealing area. The tilt force acting on the first valve member can therefore be a function of the sealing area and the inlet pressure. The outlet fluid pressure can act on an opposite side of the sealing area, which can be defined as a downstream side. The outlet pressure can define a force acting on the first valve member which is a function of the sealing area and the outlet pressure. In this arrangement, the first valve assembly can be tilted by the effect of a pressure differential between the inlet and outlet pressures.
    [0027] The apparatus may comprise a limiting arrangement configured to limit or restrict the movement of the first valve member. The limiting arrangement can be configured to limit the movement of the first valve member during the opening of the valve assembly. The limiting arrangement can be arranged to limit the movement of the first valve member to a limiting point and to allow the second valve member to move beyond the limiting point and to become disengaged from the first valve member. The limiting provision can be fixed relative to the accommodation.
    [0028] The limiting arrangement may comprise a chain.
    [0029] The limiting arrangement may comprise a land region configured to be fitted by the first valve member when at a point of limitation.
    [0030] The limiting arrangement may comprise an interdiction. The limiting arrangement may comprise a flange arrangement. The limiting arrangement may comprise an elongated member. The elongated member can extend through the second valve member.
    [0031] The valve assembly may comprise a tilt arrangement configured to tilt the first valve member in a desired direction. The tilt arrangement associated with the first valve member can be configured to tilt said member in a direction to fit with the second valve member. Such an inclination arrangement can assist the sealing between the valve members, when engaged. The inclination arrangement associated with the first valve member can comprise one or more springs, such as a spiral spring, wave spring, flat spring or the like. The inclination arrangement may comprise a deformable member capable of elastic recovery, such as an elastic body subject to deformation, for example, compression.
    [0032] The second valve member can define a drive member that is actuated to reconfigure the valve assembly between the open and closed positions. The second valve member can be positively driven to move so as to engage and disengage the first valve member. The drive can be achieved by at least one of a pressure origination force and a mechanical origination force.
    [0033] The first valve member can define a passive member configured to be engaged and disengaged by the second valve member when said second member is actuated to move. The first valve member can be configured to float within the housing. The first valve member can define a degree of freedom fluctuation. The first valve member can be configured to float in a direction associated with, for example, aligned with, a centerline of the second valve member.
    [0034] The second valve member may comprise a defining piston arrangement configured to be actuated by fluid pressure to move said second valve member. The piston arrangement can be exposed to the inlet fluid pressure on one side and the outlet fluid pressure on the opposite side. The piston arrangement can define a common seal area that isolates the inlet and outlet pressure. Correspondingly, any net pressure force can be provided by the pressure differential.
    [0035] The piston arrangement can be remote from the set point or sealing area defined between the first and second valve members. Correspondingly, the piston arrangement can be appropriately adjusted to provide a desired pressure generating force to manipulate, move or drive the second valve member. In this way, any contribution required to the driving force via the fitting or sealing area can be minimized so that the said area can be allowed to be reduced. Such a reduction in the sealing area can minimize the issues associated with contamination, the requirement to use expensive components and the like. In addition, the ability to use a smaller fitting or sealing area can increase the sensitivity of the valve assembly in use. For example, the smallest sealing area can provide more sensitive control over the separation of the first and second valve members and associated back pressure control.
    [0036] The piston arrangement can be at least partially defined by an annular structure, which can be an integral or separate and connected part of the second valve member.
    [0037] The piston arrangement can be defined by a sealing area associated with the second valve member. The sealing area can be larger than any sealing area associated with the fitting region between the first and second valve members,
    [0038] The valve assembly may comprise a tilt arrangement configured to tilt the second valve member in a desired direction. The tilt arrangement can tilt the second valve member to move in one direction to close the valve assembly. The tilt arrangement can be selected to provide a desired tilt force. The tilt force can be selected to define a pressure differential between inlet and outlet pressures. The second valve member can be configured to be driven to move in one direction to close the valve assembly by a combination of the tilt force from a tilt arrangement and an outlet pressure force acting in a tilt arrangement. associated piston. The second valve member can be configured to be actuated to move in one direction to open the valve assembly by an inlet pressure force acting on the associated piston arrangement. The inclination arrangement associated with the second valve member may comprise one or more springs, such as, spiral spring, wave spring, flat spring or the like. The inclination arrangement may comprise a deformable member capable of elastic recovery, such as an elastic body subject to deformation, for example, compression.
    [0039] One of the first and second valve members can define a valve seat member and the other of the first and second members can define a valve body member. The valve seat member can define a valve seat that is engaged by the valve body member.
    [0040] The valve body member may comprise a pin. The valve body member may comprise a ball The valve body member may comprise a disc, plug, plunger or the like.
    [0041] One or both of the valve members can define an internal orifice configured to accommodate the flow of injection fluid through it. One or both of the valve members can define an orifice configured to define part of the injection fluid flow path within the housing.
    [0042] One or both of the members can be movable in the reverse directions. The valve members can be movable in the same direction. One or both of the valve members can be movable in one direction along the flow path.
    [0043] The injection device may comprise a fragile pressure-classified arrangement configured to burst upon exposure to a predetermined pressure. The fragile arrangement can be located inside the housing. The flimsy arrangement can be located at the inlet or upstream side of the valve assembly. The flimsy arrangement can be configured to isolate the valve assembly from the inlet pressure until required. The fragile arrangement may comprise a rupture disc, rupture cartridge or similar arrangement.
    [0044] The injection device may comprise an surge protection arrangement configured to provide protection against surge flow within or through the housing. Such surge flow can be caused by a specific pump function cycle, rupture of a fragile or similar arrangement. The surge protection arrangement can be configured to provide protection for the valve assembly. The surge protection arrangement can be located inside the housing. The surge protection arrangement can be located at the inlet or upstream side of the valve assembly.
    [0045] The surge protection arrangement may comprise a component defining a flow path, where the flow path is restricted in the case of the surge flow. The flow path can be restricted by being partially or completely closed. The surge protection arrangement can be tilted towards a condition in which the flow path is open, and moved against said inclination during the surge flow. The magnitude of the slope can define the surge rating of the surge protection arrangement. The surge protection arrangement may comprise a spring configured to tilt the surge protection arrangement towards a condition where the flow path is open.
    [0046] The surge protection arrangement may comprise the first and second members, where at least one member defines a flow path and relative movement of the first and second members during the surge flow restricts said flow path. A tilt member, such as a spring member, can be provided between the first and second members and arranged to tilt said members to keep the flow path open. Correspondingly, the surge flow can act against the tilt of the tilt member.
    [0047] One or both of the first and second members may comprise a sleeve.
    [0048] The injection device may comprise a filter arrangement configured to filter the injection fluid. The filter arrangement can be mounted inside the housing. The filter arrangement can be located at the inlet or side upstream of the valve assembly.
    [0049] The filter arrangement may comprise at least one filter medium, such as a screen, mesh, porous element, sintered porous element, membrane or the like. The filter medium can be configured to filter by the size exclusion mechanism.
    [0050] The filter arrangement can be fixed relative to the housing. A filter means can be fixed relative to the housing.
    [0051] The filter arrangement can facilitate the fluid contour in the event of an obstruction, thus allowing the flow to be maintained. The filter arrangement may comprise a displaceable member which is displaced to allow fluid contouring, for example, to allow the fluid to bypass at least one filter medium by generating the inlet pressure that exceeds a predetermined value. Such inlet pressure may increase when exposed to the increased restriction of the filter medium, for example, due to obstruction. The displaceable member can carry or support at least one filter medium.
    [0052] The displaceable member can be inclined by an inclination arrangement, such as a spring, in which the displaceable member is displaced against said inclination. Correspondingly, the inclination arrangement can be selected to define the desired predetermined value of the inlet pressure that initiates the contour.
    [0053] The tilt arrangement associated with the displaceable member of the filter arrangement can also function as a tilt member associated with the first valve member.
    [0054] The injection device may comprise at least one check valve configured to prevent flow along the injection fluid flow path in one direction from the outlet to the inlet. Such an arrangement can eliminate the risk of flow reversal, for example, if the outlet pressure exceeds the inlet pressure. At least one check valve can be located at an outlet or downstream side of the valve assembly.
    [0055] According to a second aspect of the present invention, there is provided a method of controlling the injection flow through an injection device between an injection line and a target location, wherein the injection device includes a housing defining a flow path. extending between an inlet and an outlet and a valve assembly comprising the first and second movable valve members located within the housing, the method comprising: detach the first and second valve members to allow flow along the flow path; fit the first and second valve members to prevent flow; and tilting the first valve member against the second valve member when engaged with it with the inlet fluid pressure to assist sealing between said members.
    [0056] The method may comprise the use of the injection device according to the first aspect. Correspondingly, the characteristics and their defined and implicit methods of use presented in accordance with the first aspect can be applied to the method according to the second aspect.
    [0057] In accordance with a third aspect of the present invention, an injection device is provided for use when injecting a fluid at a target site, comprising: a housing defining an inlet to communicate with an injection line, an outlet to communicate with a target location and an injection fluid flow path extending between the inlet and outlet; and a valve assembly located inside the housing and configured to control the flow of injection fluid along the flow path,
    [0058] wherein the valve assembly comprises the first and second valve members configured to be engaged to prevent flow and disengaged to permit flow, wherein at least one of the valve members defines a piston arrangement provided separately from the engagement region between the first and second valve members and configured to be driven by fluid pressure to move at least one of said valve members.
    [0059] The piston arrangement can be defined by a sealing area associated with at least one of the first and second valve members. The sealing area can be larger than any sealing area associated with the fitting region between the first and second valve members.
    [0060] Several characteristics defined with respect to the first aspect can be associated with the third aspect.
    [0061] In accordance with a fourth aspect of the present invention, an injection device is provided for use in injecting a fluid into a target location, comprising: a housing defining an inlet to communicate with an injection line, an outlet to communicate with a target location and an injection fluid flow path extending between the inlet and outlet; a valve assembly located within the housing and configured to control the flow of injection fluid along the flow path; and an surge protection arrangement configured to provide protection against surge flow through the housing.
    [0062] The surge protection arrangement may comprise a component defining a flow path, where the flow path is restricted in the case of the surge flow. The flow path can be restricted by being partially or completely closed. The surge protection arrangement can be tilted towards a condition in which the flow path is open, and moved against said inclination during the surge flow. The magnitude of the slope can define the surge rating of the surge protection arrangement. The surge protection arrangement may comprise a spring configured to tilt the surge protection arrangement towards a condition where the flow path is open.
    [0063] The surge protection arrangement can comprise the first and second members, where at least one member defines a flow path and the relative movement of the first and second members during the surge flow restricts said flow path. A tilt member, such as a spring member, can be provided between the first and second members and arranged to tilt said members to keep the flow path open. Correspondingly, the surge flow can act against the tilt of the tilt member.
    [0064] One or both of the first and second members may comprise a sleeve.
    [0065] Several characteristics defined in relation to the first aspect can be associated with the fourth aspect.
    [0066] In accordance with a fifth aspect of the present invention, an injection device is provided for use in injecting a fluid into a target site, comprising: a housing defining an inlet to communicate with an injection line, an outlet to communicate with a target location and an injection fluid flow path extending between the inlet and outlet; a valve assembly located within the housing and configured to control the flow of injection fluid along the flow path; and a filter arrangement configured to filter the injection fluid and allow fluid contour in the event of an obstruction.
    [0067] The filter arrangement can be mounted inside the housing. The filter arrangement can be located at the inlet or side upstream of the valve assembly.
    [0068] The filter arrangement may comprise at least one filter medium, such as a screen, mesh, porous element, sintered porous element, membrane or the like. The filter medium can be configured to filter by the size exclusion mechanism.
    [0069] The filter arrangement can be fixed relative to the housing. A filter means can be fixed relative to the housing.
    [0070] The filter arrangement may comprise a displaceable member that is displaced to allow fluid contouring, for example, to allow fluid to bypass at least one filter medium by generating the inlet pressure that exceeds a predetermined value. Such inlet pressure may increase when exposed to increased restriction from the filter medium, for example, due to obstruction. The displaceable member can carry or support at least one filter medium.
    [0071] The displaceable member can be inclined by an inclination arrangement, such as a spring, in which the displaceable member is displaced against said inclination. Correspondingly, the inclination arrangement can be selected to define the desired predetermined value of the inlet pressure that initiates the contour.
    [0072] The tilt arrangement associated with the displaceable member of the filter arrangement can also function as a tilt member associated with the first valve member.
    [0073] Several characteristics defined with respect to the first aspect can be associated with the fifth aspect.
    [0074] In the various aspects defined above, an injection line and / or a target site can form part of the invention. BRIEF DESCRIPTION OF THE DRAWINGS
    [0075] These and other aspects of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 illustrates a portion of a known injection valve; Figure 2 provides a diagrammatic cross-sectional illustration of a well orifice including an injection line; Figure 3A provides a cross-sectional illustration of a portion of an injection device in accordance with a configuration of the present invention, shown in a closed configuration; Figure 3B shows the device of Figure 3A in an open configuration; Figure 4A provides a cross-sectional illustration of a portion of an injection device in accordance with an alternative configuration of the present invention, shown in a closed configuration; Figure 4B shows the device of Figure 4A in an open configuration; Figure 5A provides a cross-sectional illustration of a portion of an injection device in accordance with an additional alternative configuration of the present invention, shown in a closed configuration; Figure 5B shows the device of Figure 5A in an open configuration; Figure 6 provides a cross-sectional illustration of a portion of an injection device in accordance with an additional configuration of the present invention; Figure 7 provides a cross-sectional illustration of a portion of an injection device in accordance with an even further configuration of the present invention; and Figure 8 provides a cross-sectional illustration of an injection device in accordance with another configuration of the present invention. DETAILED DESCRIPTION OF THE DRAWINGS
    [0076] A diagrammatic arrangement of the well hole is illustrated in Figure 2. The well hole, generally identified by reference numeral 10, comprises a coating line 12 that extends through a perforated hole 14 that extends from surface 16 to intercept a formation containing hydrocarbon 18. A lower ring area 20 defined between the liner 12 and orifice 14 can be filled with cement 22 for the purposes of support and sealing. A production pipeline line 24 extends into the liner 12 from a wellhead 26 and production shaft 28. A lower end of the production pipeline line 24 is sealed against the liner 12 with a production retainer 30 to isolate a production zone 32. Numerous perforations 33 are established through the liner 12 and cement 22 to establish fluid communication between the liner 12 and the formation 18. The hydrocarbons can then be allowed to flow into the liner 12 in the production zone 32 and then to production pipe 24 via inlet 34 to be produced on the surface. Artificial lifting equipment, such as an electric submersible pump (ESP) 35 can optionally be installed in line with production piping 24 as part of the completion to assist production on the surface. The production tree 28 can provide the necessary pressure barriers and provides a production outlet 36 from which the produced hydrocarbons can be delivered to a production facility (not shown), for example.
    [0077] An injection line or conduit 38 runs along the production pipeline 24 from an injection fluid source 40 located on the surface to a target downhole location, which, in the illustrated configuration, is a location along the pipeline production 24 defined by an injection chuck 42 (although chuck 42 is optional). An injection pump 43 is located at an edge location to facilitate the injection of the injection fluid 40. An injection device 44 is located in a lower region of the injection line 38 and works to maintain positive pressure within the injection line. 38. This device 44 can therefore minimize the risk and associated problems of hydrostatic dropping of the injection fluid, which can be made more significant by the presence of ESP 35 which can effectively reduce the pressure inside the production pipeline 24 at the injection point . The injection fluid can comprise a treatment chemical or the like.
    [0078] An example of an injection device 44 in accordance with a configuration of the present invention is shown in Figures 3A and 3B, the reference of which is now made, in which device 44 is shown in a closed configuration in Figure 3A and in an open configuration in Figure 3B. It should be noted that only a portion of the injection device 44 is illustrated in Figures 3A and 3B for clarity. The device 44 includes a housing 46 that defines an input side 48 to communicate with the injection line 38 (Figure 2) and an output side 50 to communicate with the target location 42 (Figure 2), with a injection fluid flow path 52 formed between them. As will become apparent from the following description, flow path 52 is defined by a number of different components of injection device 44 and is not fully defined by housing 46. It should also be noted that, although housing 46 has been illustrated as a single component, housing 46 can in fact be formed from a number of different components or modules.
    [0079] The injection device 44 further comprises a valve assembly 54 located within the housing 46. As will become apparent from the description below, the valve assembly 54 is configured to control the flow of the injection fluid along the flow path 52 to maintain an associated injection line 38 (Figure 2) at positive pressure.
    [0080] The valve assembly 54 comprises the first and second valve members 56, 58 which are both arranged for movement within the housing 46. In the configuration shown, the first valve member 56 is provided in the form of a pin and defines a body member valve, and the second valve member 58 is generally provided in the form of a cylinder and defines a valve seat member. The flow may be allowed to flow around the first valve member 57 and / or a flow path 57 may be provided through the member 56 to accommodate the flow. The second valve member 58 defines a flow path 60 through which it forms part of the flow path 52 through the housing 46. When the first and second valve members 56, 58 are engaged, as shown in Figure 3A, the assembly valve 54 is configured to be closed to prevent flow through flow path 52 (57, 60). When the fittings and second valve members 56, 58 are engaged, a sealing area 62 is defined.
    [0081] Valve assembly 54 includes a limiting arrangement that is configured to limit movement of the first valve member 56. Specifically, device 44 includes a fixed limiting feature 64 relative to housing 46, and a corresponding limiting feature 66 fixed relative to the first member valve 56. In the arrangement shown in Figure 3A when the first and second valve members 56, 58 are engaged, the corresponding limiting characteristics 64, 66 are separated so that the inlet fluid pressure PI can act on the area of seal 62, thus forcing the first and second valve members 56, 58 together to assist sealing between them.
    [0082] In addition, an optional spring 68 is provided which also acts to tilt the first valve member 56 against the second valve member 58.
    [0083] A driver spring 70 is provided that acts on the second valve member 58, via annular flap 72, to tilt said member 58 in one direction to fit the first valve member 56. Furthermore, the second valve member 58 defines a piston arrangement 74 which is sealed relative to housing 46, in the present configuration using! a seal 76, in which an upstream side 78 is exposed to inlet fluid pressure PI, and a downstream side 80 is exposed to outlet fluid pressure Po. Correspondingly, a net pressure force will be applied to the second valve assembly 58 in accordance with any differential between the inlet and outlet pressures PI, Po. As the second valve member 58 is arranged to be actuated by various forces (pressure and spring forces), said member 58 can be defined as an actuator member.
    [0084] The movement of the second valve member 58 is initiated to disengage the valve members 56, 58, to configure the valve assembly 54 in an open position to allow flow through the flow path 52 (57, 60), as shown in Figure 3B. Such movement is initiated when the inlet pressure PI is of a magnitude sufficient to apply a force to the piston arrangement 74 to overcome the corresponding force applied by the outlet pressure Po in addition to the force applied by the spring 70. In the present configuration, depending on the seal 76 has a common area on both sides of the piston arrangement 74 so that the second valve member 58 will be moved in one direction to open the valve assembly 54 when the inlet pressure PI exceeds the outlet pressure Po by an amount proportional to the force of the spring 70. Correspondingly, the pressure rating of the injection device 44 can be defined in accordance with the spring 64. It is recognized that a compression spring will generate a return force that is proportional to the compression length. However, in typical operations, the magnitude of compression of the spring can be considered small enough that the change in spring force can be insignificant. However, in other operations with greater spring compression, this can be accounted for.
    [0085] During the initial movement of the second valve member 58, both members 56, 58 will remain engaged due to the inlet pressure PI acting on the sealing area 62, in addition to the action of the spring 68. The fitting will persist until the corresponding limiting characteristics 64 , 66 are placed together, thus allowing additional movement of the second valve member 58 to cause the disengagement, as shown in Figure 3B. Such detachment defines a flow passage 82 between the first and second members 56, 58, where the flow passage provides flow restriction. This restriction, therefore, establishes a back pressure on the inlet side, thus working to keep the inlet pressure PI above the outlet pressure Po. In addition, due to the effect of piston arrangement 74 and actuator spring 70, flow passage 82 will be continuously adjusted to maintain the inlet pressure PI at a defined magnitude greater than the outlet pressure Po. The pressure differential will be provided as a function of the spring force. This can help to eliminate problems associated with, for example, hydrostatic dropping of the injection fluid. In addition, this may allow a regulated flow rate or injection rate to be achieved. For example, the flow rate can be kept at a substantially constant rate regardless of inlet and outlet pressures, for example.
    [0086] When the PI inlet pressure drops below a sustainable magnitude, valve assembly 54 will be caused to close again, with the PI inlet pressure acting on the sealing area 62 to assist with the sealing, thus minimizing the risk of leakage and any problems associated with this, such as hydrostatic dropping of the injection fluid.
    [0087] It should be noted that the differential effect of the inlet and outlet pressures PI, Po to apply a causative force to the second valve member 58 is mainly shown on the piston arrangement 74 (or more precisely on the seal area 76) that is provided remotely from the sealing area 62 defined between members 56, 58, when engaged. As such, the piston arrangement 74 and seal 76 can be appropriately sized to achieve the required driving forces, so that the seal area 62 can be minimized. This can help to allow a better seal to be achieved, and also allow smaller components to be used.
    [0088] Reference is now made to Figures 4A and 4B in which a cross-sectional view of a portion of an injection device 144 in accordance with an alternative embodiment of the present invention is shown. Device 144 is shown in an open configuration in Figure 4A, and in a closed configuration in Figure 4B. Device 144 is similar to device 44 first shown in Figure 3A and, as such, similar characteristics share similar reference numerals, incremented by 100. Furthermore, depending on the structure and operation of device 144, they are similar to device 44, only differences will be highlighted in the interest of brevity. Accordingly, device 144 includes a valve assembly 154 having first and second valve members 156 158, wherein the first valve member 156 is provided in the form of a ball. A limiting element in the form of an elongated stem 164 having a central flow path 165 extends through the orifice 160 of the second valve member 158 and is fixed relative to the housing 146.
    [0089] When valve assembly 154 is closed, as shown in Figure 4A, the first and second valve members 156, 158 are engaged and a sealing area 162 is defined with the inlet pressure PI acting on the sealing area 162 to tilt the first valve member 156 against the second valve member 158 to assist sealing. A 168 spring also contributed to this.
    [0090] When a sufficient inlet pressure PI exists, the second valve member 158 will be caused to move, together with the fitted first valve member 156 until said member 156 contacts or lands on the elongated stem 164, thus allowing the separation of the members 156, 158 and creating a flow passage 182, as shown in Figure 4B.
    [0091] In the configuration illustrated in Figures 4A and 4B, the first valve member is provided in the form of a ball 156. However, and as illustrated in Figures 5A and 5B, an injection device 144a in accordance with an alternative configuration can comprise a pin 156a . The various features associated with device 144a shown in Figures 5A and 5B are otherwise identical to those of device 144 shown in Figures 4A and 4B, and as such, no further description will be provided.
    [0092] Reference is now made to Figure 6 in which an additional alternative configuration of an injection device 244 is shown. The injection device 244 is similar to the device 44 first shown in Figure 3A and, as such, similar components share similar reference numerals, increased by 200. In addition, as the structure and operation of devices 244 and 44 are broadly similar, only differences will be highlighted. For example, although device 244 includes the first and second valve members 256, 258 which are engaged to define a sealing area 262 to prevent flow along flow path 252, the first valve member 256 defines a member valve seat, whereas the second valve member defines a valve body member. To accommodate such a modification over the previously described configurations, some structural modifications are illustrated, such as the provision of a sealed space 200 that is in pressure communication with the inlet pressure PI via pressure conduit 201, and the provision of a seal 202 that isolates the inlet and outlet pressure PI, Po through the first valve member 256.
    [0093] Figure 7 illustrates a portion of an injection device according to an additional configuration of the present invention. In this case, the injection device, usually identified by reference number 244a, is very similar to device 244 in Figure 6. However, the first and second valve members 256a, 256b are configured so that a separate pressure conduit (such as as, conduit 201 of device 244 in Figure 6) is not required.
    [0094] An additional alternative configuration of an injection device, in this case, usually identified by reference numeral 344, is shown in Figure 8. Device 344 is similar to device 44 first shown in Figure 3A and, as such, similar characteristics share the same characteristics. similar reference numerals increased by 300. For the sake of brevity of the present description, only the differences will be described. However, the appropriate components have been labeled with appropriate reference numerals, so that similar characteristics can be identified and understood accordingly.
    [0095] Nevertheless, it is notable in the present configuration that device 344 includes a valve assembly 354 that includes the first and second valve members 356, 358 that are engaged to prevent flow along flow path 352 and disengaged to allow and regulate flow and pressure.
    [0096] A rupture cartridge 305 is provided upstream of valve assembly 354 and is configured to rupture and allow flow upon exposure to a limit or rated inlet pressure. The rupture cartridge can be supplied to isolate the components downstream from the effects of pressure until commissioning, for example, during implantation in a well orifice.
    [0097] Device 344 also comprises a surge protection arrangement 307 located downstream of rupture cartridge 305, but upstream of valve assembly 354 (although this specific configuration is optional). The surge protection arrangement 307 provides protection within the device, for example, to the valve assembly 354 from the effects of flow surges, as can be experienced by breaking the 305 rupture cartridges.
    [0098] The surge protection arrangement 307 includes a surge pin or body component 309 that includes numerous flow ports 311 that are open during normal flow. During an outbreak event, the outbreak pin 309 is moved downward against the force of the spring 313 so that flow ports 311 become restricted by interaction with a sleeve 315. After the outbreak event, the spring 313 will act to return surge pin 309 to its initial position, thus opening doors 311 again.
    [0099] The device 344 further comprises a filter arrangement 317 which is located downstream of the surge arrangement 307 and upstream of the valve assembly 354. The filter arrangement 317 includes a frame assembly 319 within which a filter screen 321 is mounted. (although another filter medium is possible, such as a mesh, porous element, sintered porous element, membrane or the like), During normal use, the injection fluid flows through the screen 321 to be filtered, thus protecting the assembly of downstream valve 354. However, if the filter screen 321 becomes clogged, then, in order to prevent device 344 from stopping altogether, frame assembly 319 is capable of being depressed against the force of the spring 368 (which also acts on the first valve member 356), thus allowing flow contour. Although filtration of the injection fluid is no longer possible, this may allow the device 344 to continue to operate until a clogged filter 321 can be remedied or the injection requirements have been met and are no longer required or accepted as having been lost. More specifically, the increase in inlet pressure caused by the blocked screen 321 (which defines a flow restriction and establishes a back pressure) will eventually displace the frame assembly 319 against the force of the spring 368. In another configuration (which is not shown), the filter screen can be fixed relative to the housing. For example, no contouring functionality can be provided. Alternatively, the filter screen can be fixed relative to the housing and a separate displaceable member can be provided which is moved in accordance with the flow / pressure conditions to allow the outline of the fixed screen (or other filter medium) to be provided.
    [0100] The device further comprises a check valve arrangement 323 that prevents reverse flow through device 344.
    [0101] It should be understood that the configurations described here are merely exemplary and that several modifications can be made to them without deviating from the scope of the invention. For example, one or more characteristics of a configuration can be used in any other configuration. For example, at least one of the rupture cartridge 305, surge protection arrangement 307 and filter arrangement 317 can be used together or individually in any other configuration.
    权利要求:
    Claims (25)
    [0001]
    Injection device (44, 144, 144a, 244, 244a, 344) for use in the injection of fluid in a well-bottom target location (42), comprising: a housing (46, 146, 346) that defines an input (48, 148, 248, 348) for communicating with an injection line (38), an output (50, 150, 250, 350) for communicating with a target location downhole (42) and an injection fluid flow path (52, 152, 252, 352) that extends between the inlet (48, 148, 248, 348) and the outlet (50, 150, 250, 350); a valve assembly (54, 154, 254, 254a, 354) located within the housing (46, 146, 346) and configured to control the flow of injection fluid along the flow path (52, 152, 252, 352 ), the valve assembly (54, 154, 254, 254a, 354) comprising the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358 ) both arranged to move within the housing (46, 146, 346); a limiting arrangement configured to limit or restrict the movement of the first valve member (56, 156, 156a, 256, 256a, 356), the limiting arrangement including a fixed limiting feature in relation to the housing and a corresponding limiting feature fixed in relation to the first valve member; characterized by the fact that, in an open flow configuration, the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) are disengaged and, in a closed configuration to prevent flow, the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) are engaged and the corresponding limiting features of the limiting arrangements are separated so that the first valve member (56, 156, 156a, 256, 256a, 356) is tilted against the second valve member (58, 158, 158a, 258, 258a, 358) by the fluid pressure (Pi) inlet to assist in sealing between them.
    [0002]
    Injection device (44, 144, 144a, 244, 244a, 344), according to claim 1, characterized by the fact that the valve assembly is arranged to be opened when the pressure differential between the inlet (48, 148 , 248, 348) and the outlet (48, 148, 248, 348) exceeds a predetermined and closed value when the pressure differential between the inlet (48, 148, 248, 348) and the outlet (48, 148, 248, 348) falls below a predetermined value.
    [0003]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 1, characterized by the fact that the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) define a flow restriction when disengaged to establish a back pressure on the inlet side (48, 148, 248, 348), helping to maintain the inlet pressure above the outlet pressure.
    [0004]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 1, characterized by the fact that the first valve member (56, 156, 156a, 256, 256a, 356) is located in the inlet side (48, 148, 248, 348) of the valve assembly (54, 154, 254, 254a, 354) and the second valve member (58, 158, 158a, 258, 258a, 358) is located in a outlet side (48, 148, 248, 348) of the valve assembly (54, 154, 254, 254a, 354).
    [0005]
    Injection device according to claim 1, characterized by the fact that the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) define a sealing area (62, 162, 262) in the engagement region.
    [0006]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 5, characterized by the fact that the sealing area (62, 162, 262) defined between the first and the second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) when engaged it is exposed to the inlet fluid pressure (Pi) to establish a bias force acting on the first valve member (56, 156, 156a, 256, 256a, 356).
    [0007]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 1, characterized in that the limiting arrangement is adapted to limit the movement of the first valve member (56, 156, 156a, 256, 256a, 356) at a stop point and allow the second valve member (58, 158, 158a, 258, 258a, 358) to move past the stop point and disengage from the first valve member (56, 156 , 156a, 256, 256a, 25 356.
    [0008]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 1, characterized in that the limiting arrangement comprises a land region configured to be engaged by the first valve member (56, 156, 156a, 256, 256a, 356) when at a point of limitation.
    [0009]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 1, characterized in that the second valve member (58, 158, 158a, 258, 258a, 358) defines a member actuator that is activated to reconfigure the valve assembly (54, 154, 254, 254a, 354) between the open and closed positions
    [0010]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 1, characterized in that the second valve member (58, 158, 158a, 258, 258a, 358) comprises or defines a piston arrangement (74, 174, 274, 374) configured to be actuated by fluid pressure to move said second valve member (58, 158, 158a, 258, 258a, 358).
    [0011]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 10, characterized in that the piston arrangement (74, 174, 274, 374) defines a sealing area exposed to pressure of inlet fluid (Pi) on one side and the outlet fluid pressure (Po) on the opposite side.
    [0012]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 11, characterized by the fact that the sealing area of the piston arrangement (74, 174, 274, 374) is larger than any sealing area (62, 162, 262) associated with the engagement region between the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358 ).
    [0013]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 1, characterized in that the valve assembly (54, 154, 254, 254a, 354) comprises a configured polarization arrangement to polarize the second valve member (58, 158, 158a, 258, 258a, 358) in a desired direction.
    [0014]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 13, characterized in that the polarization arrangement is selected to provide a desired polarization force selected to define a pressure differential between inlet and outlet pressures (Pi, Po).
    [0015]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 1, characterized by the fact that one of the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) define one valve seat member and the other of the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) defines a member of the valve body.
    [0016]
    Injection device (44, 144, 144a, 244, 244a, 344), according to claim 1, characterized by the fact that it comprises a frangible arrangement with pressure configured to rupture upon exposure to a predetermined pressure.
    [0017]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 1, characterized by the fact that it comprises an overvoltage protection device (307) configured to provide protection against increased flow within or through of the accommodation (46, 146, 346).
    [0018]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 17, characterized in that the overvoltage protection device (307) comprises a component that defines a flow path (311) , where the flow path (311) is restricted in the case of wave flow.
    [0019]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 1, characterized in that it comprises a filter arrangement configured to filter the injection fluid.
    [0020]
    Injection device (44, 144, 144a, 244, 244a, 344), according to claim 19, characterized by the fact that the filter arrangement is adapted to facilitate the diversion of fluid in the event of clogging, thus allowing maintenance flow.
    [0021]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 19, characterized in that the filter arrangement comprises a displaceable member which is displaceable to allow for fluid diversion after exposure to a pressure input (Pi) that exceeds a predetermined value.
    [0022]
    Method for controlling the injection flow through an injection device (44, 144, 144a, 244, 244a, 344) between an injection line (38) and a downhole target location (42), where the injection device (44, 144, 144a, 244, 244a, 344) includes a housing (46, 146, 346) that defines a flow path (52, 152, 252, 352) that extends between an entrance (48, 148, 248 , 348) and an outlet (48, 148, 248, 348) and a valve assembly (54, 154, 254, 254a, 354) comprising first and second movable valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) located inside the compartment (46, 146, 346), the method characterized by comprising: disengage the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) to allow flow along the flow path (52, 152, 252 , 352); engaging the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) to prevent flow; press the first valve member (56, 156, 156a, 256, 256a, 356) against the second valve member (58, 158, 158a, 258, 258a, 358) when engaged with the inlet fluid pressure (Pi) to assist in sealing between said members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358); and define a flow restriction when the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) are disengaged to establish a back pressure on the inlet side, helping to keep the inlet pressure above the outlet pressure.
    [0023]
    Injection device (44, 144, 144a, 244, 244a, 344) for use in the injection of fluid in a well-bottom target location (42), comprising: a housing (46, 146, 346) that defines an input for communicating with an injection line (38), an output (50, 150, 250, 350) for communicating with a target bottom point (42) and a injection fluid flow path (52, 152, 252, 352) extending between the inlet (48, 148, 248, 348) and the outlet (50, 150, 250, 350); and a valve assembly (54, 154, 254, 254a, 354) located within the housing (46, 146, 346) and configured to control the flow of injection fluid along the flow path (52, 152, 252, 352 ), characterized by the fact that the valve assembly (54, 154, 254, 254a, 354) comprises a first and a second valve member (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) configured to be engaged in a sealing area (62, 162, 262) to prevent flow and disengaged to allow flow, in which at least one of the valve members (56, 156, 156a, 256, 256a , 356) defines a piston arrangement (74, 174, 274, 374) supplied separately from the engagement region between the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a , 258, 258a, 358) and configured to be actuated by fluid pressure to move at least one of said valve members; a limiting arrangement including a fixed limiting feature in relation to the housing and a corresponding fixed limiting feature in relation to the first valve member; and where, when the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) are engaged to prevent flow, the corresponding limiting features are separated so that the pressure of the inlet fluid (Pi) acts on the sealing area (62, 162, 262), thus forcing the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358) together to assist in sealing between them.
    [0024]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 23, characterized in that the piston arrangement (74, 174, 274, 374) is defined by a sealing area ( 62, 162, 262) associated with at least one of the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358).
    [0025]
    Injection device (44, 144, 144a, 244, 244a, 344) according to claim 24, characterized by the fact that the sealing area is larger than any sealing area (62, 162, 262) associated with an engagement region between the first and second valve members (56, 156, 156a, 256, 256a, 356, 58, 158, 158a, 258, 258a, 358).
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    同族专利:
    公开号 | 公开日
    US9540905B2|2017-01-10|
    EP2694778B1|2021-07-14|
    AU2012238486A1|2013-11-21|
    EP2694778A2|2014-02-12|
    GB201105873D0|2011-05-18|
    BR112013025868A2|2017-04-04|
    RU2013149407A|2015-05-20|
    AU2012238486B2|2017-02-23|
    US20140182855A1|2014-07-03|
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    CA2832511A1|2012-10-11|
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    GB2489730B|2017-08-09|
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    WO2012136966A3|2013-04-18|
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    GB201304859D0|2013-03-17|2013-05-01|Tco As|Flow system|
    US9388675B2|2013-06-18|2016-07-12|Baker Hughes Incorporated|Multi power launch system for pressure differential device|
    US9714556B2|2013-11-08|2017-07-25|Baker Hughes Incorporated|Shear seal check valve for use in wellbore fluid|
    WO2015069968A1|2013-11-08|2015-05-14|Schlumberger Canada Limited|System and methodology for supplying diluent|
    US9447658B2|2013-11-27|2016-09-20|Baker Hughes Incorporated|Chemical injection mandrel pressure shut off device|
    NO2761245T3|2014-08-25|2018-03-03|
    NO2734508T3|2014-11-26|2018-07-28|
    GB2535185B|2015-02-11|2021-01-13|Weatherford Uk Ltd|Valve assembly|
    WO2018044299A1|2016-08-31|2018-03-08|Halliburton Energy Services Inc.|High opening pressure poppet valve|
    CA3000012A1|2017-04-03|2018-10-03|Anderson, Charles Abernethy|Differential pressure actuation tool and method of use|
    US10480661B2|2017-09-06|2019-11-19|Baker Hughes, A Ge Company, Llc|Leak rate reducing sealing device|
    US10662737B2|2018-07-24|2020-05-26|Baker Hughes, A Ge Company, Llc|Fluid injection valve|
    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-10-15| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: E21B 43/25 , F16K 17/04 Ipc: E21B 34/08 (1980.01), E21B 34/10 (1980.01), E21B 3 |
    2019-10-22| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-12-08| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
    2021-02-17| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-03-23| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 05/04/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    GB1105873.2|2011-04-07|
    GB1105873.2A|GB2489730B|2011-04-07|2011-04-07|Injection device|
    PCT/GB2012/000326|WO2012136966A2|2011-04-07|2012-04-05|Injection device|
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