• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ACTUATOR, WELL SYSTEM, AND ACTION METHOD. An actuator that can be used in a downhole to change the state of a downhole tool. The actuator has an operator that is axially movable in response to a change in production tube pressure. The actuator includes a hydraulic circuit that creates a temporary reference pressure against the operator's production tube pressure ratings.
    公开号:BR112014011704B1
    申请号:R112014011704-7
    申请日:2012-11-09
    公开日:2021-05-11
    发明作者:Richard T. Caminari
    申请人:Prad Research And Development Limited；
    IPC主号:
    专利说明:

    FUNDAMENTALS OF THE INVENTION
    [0001] This section provides fundamental information to facilitate a better understanding of the various aspects of disclosure. It should be understood that the statements in this section of this document are to be read in this light and not as admissions of prior art.
    [0002] Hydrocarbon fluids such as oil and natural gas are obtained from an underground geological formation, referred to as a reservoir, by drilling a well that penetrates the formation containing hydrocarbons. Forms of well completion components can be installed in the wellbore to control and improve the fluid production efficiency of the reservoir. Some of the equipment used in the drilling, completion, and/or production of the well is actuated from one position to another. ABSTRACT
    [0003] According to one or more embodiments, an actuator independent of hydrostatic pressure includes an axially movable operator in response to a differential pressure between a first chamber and a second chamber. A hydraulic circuit couples the first chamber and the second chamber to an axial bore of the actuator. The second chamber is hydraulically coupled to the axial bore via a control device to create a temporary differential pressure between the first chamber and the second chamber when manipulating the axial bore pressure. For example, the hydraulic circuit can maintain a pressure in the second chamber less than the axial pressure when increasing the axial bore pressure. In some embodiments, for example, the hydraulic circuit may maintain a pressure in the second chamber greater than the axial bore pressure when the axial bore pressure is being decreased.
    [0004] According to one or more embodiments, a method includes manipulating the pressure of the production tube in a tubular column by disposing an actuator in a wellbore, creating a temporary differential pressure between a first chamber and a second chamber of the actuator by manipulating pressure and moving an operator axially in response to temporary differential pressure.
    [0005] This summary is provided to present a selection of concepts that are best described below in the detailed description. This summary is not intended to identify key or essential characteristics of the subject matter, nor is it intended to be used as an aid in limiting the scope of the subject matter. BRIEF DESCRIPTION OF THE FIGURES
    [0006] Hydrostatic pressure independent actuator modalities and methods are described with reference to the following figures. The same numbers are used throughout the figures to reference similar features and components. Emphasizes that, in accordance with standard industry practice, many features are not necessarily drawn to scale. In fact, the dimensions of various features can be arbitrarily increased or reduced to clarify the discussion.
    [0007] Figure 1 illustrates a well system in which modalities of actuators independent of hydrostatic pressure and methods can be used.
    [0008] Figure 2 illustrates an example of a downhole tool incorporating an actuator independent of hydrostatic pressure according to one or more modalities.
    [0009] Figure 3 illustrates an example of a counting mechanism that can be used with independent hydrostatic pressure actuators and methods according to one or more modalities.
    [0010] Figure 4 is a schematic diagram of a modality of a hydraulic circuit according to one or more actuator modality independent of hydrostatic pressure.
    [0011] Figure 5 is a graphical illustration of a pressure versus time response of the modality illustrated in Figure 4.
    [0012] Figure 6 is a schematic diagram of one embodiment of a hydraulic circuit according to one or more hydrostatic pressure-independent actuator embodiments.
    [0013] Figure 7 is a graphical illustration of pressure versus time response of the modality illustrated in Figure 6.
    [0008] Figure 8 is a schematic diagram of a modality of a hydraulic circuit according to one or more actuator mods independent of hydrostatic pressure.
    [0015] Figure 9 is a graphical illustration of a pressure versus time response of the modality illustrated in Figure 8. DETAILED DESCRIPTION
    [0016] It is to be understood that the following disclosure provides many different modalities or examples for implementing different features of various modalities. Specific examples of components and arrangements are described below to simplify disclosure. These are, of course, just examples and are not intended to be a limiting factor. In addition, the disclosure may repeat reference numbers and/or letters in the various examples. This repetition is for the sake of simplicity and clarity and does not in itself dictate a relationship between the various modalities and/or configurations discussed.
    [0017] As used herein, the terms "connecting", "connecting", "connected", "in connection with" and "connecting" are used to mean "in direct connection with" or "in connection with through one or more elements"; and the term "set" is used to mean "one element" or "more than one element". In addition, the terms "pair", "coupling", "coupled", "coupled together" and "coupled with" are used to mean "directly coupled together" or "coupled together through one or more elements". As used in this document, the terms "up" and "down"; "Superior and inferior"; "top" and "bottom"; and another as terms indicating the positions relative to a particular point or element are used to more clearly describe some elements. Commonly, these terms refer to a reference point as the surface from which drilling operations are initiated as the top point and the total depth as the lowest point in which the well (eg, wellbore , well hole) is vertical, horizontal or inclined to the surface. In this disclosure, "hydraulically coupled," "hydraulically connected" and similar terms can be used to describe bodies that are connected in such a way that fluid pressure can be transmitted between and between the connected items.
    [0018] Figure 1 illustrates an example of a 10 well system in which hydrostatic pressure-independent actuator modalities and methods, usually denoted by numeral 12, may be used. The illustrated well system 10 comprises a well completion 14 deployed for use in a well 16 having a wellbore 18. Wellbore 18 may be lined with cover 20 e.g. having openings 22 (e.g., boreholes, notched casing, screens) through which fluid is able to flow between the surrounding formation 24 and wellbore 18. Conclusion 14 is deployed in wellbore 18 below a wellhead 26 disposed on a surface 28 (e.g. land surface, seabed) .
    [0019] Actuator 12 is operatively connected with a tool element 40 to form a downhole tool 30. In this modality downhole tool 30 is deployed in wellbore 18 in a tubular column 32. Tubular column 32, also known as production tube 32, it can be formed of interconnected sections of threaded pipe, continuous lengths of pipe (eg, coiled tubing, flexitube), and thus providing an axial bore 42. Although the downhole tool 30 is pictured as being disposed in a vertical portion of the downhole 18, downhole tool 30 may be disposed in a lateral or offset section. A ring 36 is located between an outer surface of the production tube 32 and downhole tool 30 and the inner surface of the wellbore 18. The pressure in the ring 36 may be referred to in some embodiments as capping pressure and is associated with the hydrostatic pressure of the fluid column in ring 36.
    [0020] In an example of non-limitation, downhole tool 30 is described as a valve, for example a forming isolation valve, and tool element 40 may be a ball-type valve control element or an element flapper valve control unit. Other types of tool elements, eg sleeves, are contemplated and considered within the scope of the appended claims. Downhole tool 30 is a device that has two or more operating positions (i.e., states), e.g., open and closed position to control fluid flow, partially open (e.g., choked) fluid control positions, and on and off positions. Examples of downhole tools 30 include, without limitation, valves such as formation isolation valves ("FIV"), inlet-outlet control devices (inflow- outflow control devices,"CDI") , flow control valves (acronym for flow control valves,"FCV"), chokes and the like, as well as other downhole devices.
    [0021] Actuator 12 operates tool element 40 to control the state, for example open or closed, of tool element 40. Actuator 12 is a less intervention apparatus, also known as a path saving device, facilitating remote actuation of the tool element 40, for example, from surface 28. In this regard, according to some embodiments, actuator 12 of downhole tool 30 can be operated remotely by manipulating the pressure, in this document called the "pressure of production tube" inside the tubular column 32. The pressure of the production tube can be manipulated for example by operating the pump 34 to increase and decrease the pressure of the production tube. Actuator 12 may include a counter mechanism 46 (e.g., indexer, J-slot) that prevents actuator 12 from changing the position of tool element 40 until a predetermined number or sequence of pressure cycles are applied. A pressure cycle can be completed by increasing the pressure in the production pipe and subsequently releasing the pipe pressure. According to some embodiments, actuator 12 is operated by changes in production tube pressure and actuator operation is not dependent on a separate reference pressure such as capping pressure or a highly pressurized gas chamber such as nitrogen.
    [0022] Figure 2 illustrates an example of a downhole tool 30 depicted as a forming isolation valve ("FIV") incorporating an actuator 12 according to one or more embodiments. In the depicted embodiment, tool member 40 is a ball-type valve closure member. Tool member 40 is illustrated in a closed position blocking fluid flow through axial bore 42. Referring to Figures 1 and 2, downhole tool 30 includes threaded ends 44 for connecting to production tube 32 and forming axial hole 42 through production tube 32 and downhole tool 30.
    [0023] Shown actuator 12 includes an operator tool or operator chuck 54 (e.g. piston), a first chamber 56 and a second chamber 58. In the embodiment depicted, operator chuck 54 is operatively connected to housing 60 by a mechanism of counting 46. Referring to Figure 3, one embodiment of the counting mechanism 46 includes a J-slot pattern 50 formed for example on an outer surface 64 of a portion of the operator chuck 54. The counting mechanism depicted 46 is an example of a non-limiting counting mechanism that can be used in multiple modalities, and that different variations can be configured and include multiple devices.
    [0024] Axial movement of operator chuck 54 can be maintained between a first stop 76 and a second stop 78 by connecting operator chuck 54 with housing 60 by counting mechanism 46. For example, in the depicted mode, axial upward movement of the Operator chuck 54 may be interrupted by contact of shoulder 52 of operator chuck 54 against first stop 76 which is depicted as a shoulder of housing 60. Downward movement of operator chuck 54 may be limited by counting mechanism 46 to a position above the second stop 78 until the sequence of production tube pressure cycles defined by the J-slot 50 pattern of counting mechanism 46 is complete. Upon completion of the counter cycle of counting mechanism 46, operator chuck 54 is allowed to move axially beyond previously allowed to engage lock member 62 to move tool member 40 to the next position, for example to the open position therein. modality. In the actuation course, or cycle, of operator chuck 54, cam 52 may be moved close to or in contact with second stop 78. Operator chuck 54 is described as axially movable between a first position and a second position. For purposes of description, the first position is described with reference to the first stop 76 and the second position is described with reference to the second stop 78, however, it should be noted that the first and second positions are not used to identify exact locations but commonly used to identify positions that are axially spaced apart from one another.
    [0025] Chambers 56, 58 may be provided in the wall of housing 60. For example, in the depicted embodiment each chamber 56, 58 is formed between a portion of operator mandrel 54 and housing 60 between seals 70, eg O-rings. Operator chuck 54 includes a first side 72 open to the first chamber 56 and a second side 74 open to the second section 58. First and second chambers 56, 58 are each hydraulically coupled with axial bore 42 e.g. of pressure 66 (i.e., pipe compensator) and conduit 68 as further described below with reference to the illustrated hydraulic circuits 38. According to some embodiments of the hydrostatic pressure independent actuators and methods, the hydraulic circuit may be a loop system closed containing a clean operating fluid (eg oil, water, gas, compressible liquids). According to one or more embodiments, second chamber 58 is hydraulically coupled with axial bore 42 through one or more control devices, generally denoted by the numeral 75. Control devices 75 may include, without limitation, relief devices 80 (Figures 4, 8), check valve 82 (figures 4, 8), flow restrictors 84 (figure 6) and others. Control device 75 can be hydraulically coupled between axial bore 42 and second chamber 58 to create a reference pressure in second chamber 58 in response to manipulation of production tube pressure, for example by increasing production tube pressure and/or reducing the pressure of the production tube. The volume of the second chamber 58 and the volume of operating fluid are sufficient to allow a differential pressure across mandrel 54 and to allow mandrel 54 to launch. Accordingly, in some embodiments the operating fluid may be a compressible fluid (i.e., liquid, gas).
    [0026] Operator chuck 54 may be urged to a first position in response to a resiliently biasing member 48 (eg, mechanical spring) acting on operator chuck 54 in a first direction. In the embodiment depicted in Figure 2, mechanical spring 48 is in the second chamber 58. The first position is associated with a position close to the first stop 76 relative to the second position which is located towards the second stop 78. According to one or more embodiments , in response to manipulation of the production tube pressure actuator hydraulic circuit 38 creates a temporary reference pressure, for example, in the second chamber 58, against which operator chuck 54 is cycled to allow counting mechanism 46 to count. cycles and release operator chuck 54 to engage and operate tool member 40 to the next position.
    [0027] Figure 4 is a schematic diagram of a modality of a hydraulic circuit 38 according to one or more modalities of the hydrostatic pressure independent actuator 12. Figure 5 illustrates a graphical representation of a pressure versus time response of the modality illustrated in Figure 4.
    [0028] Referring also to Figures 1 and 2, operator chuck 54 is illustrated as a piston, axially movable between a first position represented by first stop 76 and a second position represented by second stop 78. Operator chuck 54 is operatively connected with a counting mechanism 46. First side 72 of operator chuck 54 is open to first chamber 56 and second side 74 of operator chuck 54 is open to second section 58. Hydraulic circuit 38 is depicted as a system of closed loop filled with an operating fluid 39. In accordance with some embodiments operating fluid 39 may be a compressible fluid (i.e., liquid, gas). Axial bore 40 of production tube 32 is hydraulically coupled with first chamber 56 and second chamber 58 via pressure compensator 66 (i.e. pipe compensator) and conduit 68. Second chamber 58 is hydraulically coupled with axial bore 42 (ie , PT piping pressure) through one or more control devices, generally denoted by the numeral 75 in Figure 2 and specifically illustrated as a pressure relief valve 80 (eg, poppet valve) and a check valve 82 (or i.e., one-way valve) in Figure 4, to create a temporary reference pressure against which to axially cycle operator chuck 54. In the embodiment depicted in Figure 4, first side 72 and second side 74 of operator chuck 54 have substantially the same open surface area for the respective first and second chambers, 56, 58 and therefore operator chuck 54 is a balanced piston.
    [0029] An example of a method of operating an actuator 12 and a downhole tool 30 is now described with reference to figures 1-5. In the depicted embodiment, check valve 82 allows operating fluid 39 to flow out of second chamber 58 and relief valve 80 (i.e., poppet valve) to maintain pressure P2 in second chamber 58 at a value less than pressure P1. For example, when downhole tool 30 is resident in wellbore 18 for a period of time, production tube pressure PT and pressure PI in first chamber 56 equalize and tilt member 48 in mode locate operator chuck 54 in a first position. Operator chuck 54 is illustrated in a first position in Figure 4 . When the pressure of the production tube PT is increased, the first pressure PI increases and pressure relief valve 80 maintains a pressure difference between the first chamber 56 (i.e., pressure PI) and second chamber 58 (i.e., the pressure P2) which allows the operator chuck 54 to move in the second direction towards the second stop 78. The differential pressure created during the pressure rise of the production tube is in response to the temporary reference pressure created in the second chamber 58 during the half rise pressure of a production tube pressure cycle (ie cycle count) . For example, as the pressure of the production tube PT and the first pressure PI increases, hydraulic circuit 38 maintains a lower pressure P2 in the second chamber 58 than the pressure of the production tube PT not allowing operating fluid 39 to enter the second chamber 58 through relief valve 80. The volume of the second chamber 58 and/or the compressibility of the operating fluid 39 allows for a differential pressure. After pressure relief from the PT production tube, check valve 82 allows the pressure to equalize across operator mandrel 54 (i.e. PI = P2) and the force of resilient tilting member 48 insta operator mandrel 54 at first direction towards the first stop 76. In this sense, manipulation of the pressure of the PT production tube cycles the operator chuck 54 up and down, creating a temporary reference pressure in the second chamber 58, thus eliminating the dependence on a pressure separate reference as a high pressure gas change or the hydrostatic ring pressure 36.
    [0030] Figure 6 is a schematic diagram of a modality of a hydraulic circuit 38 according to one or more modalities of the hydrostatic pressure independent actuator 12. Figure 7 illustrates a graphical representation of a pressure versus time response of the modality illustrated in Figure 6.
    [0031] Referring also to Figures 1 and 2, operator chuck 54 is illustrated as a piston, axially movable between a first position represented by first stop 76 and a second position represented by second stop 78. Operator chuck 54 is operatively connected with a counting mechanism 46. First side 72 of operator chuck 54 is open to first chamber 56 and second side 74 of operator chuck 54 is open to second section 58. Hydraulic circuit 38 is depicted as a system loop tube containing working fluid 39. Axial bore 40 of production tube 32 is hydraulically coupled with first chamber 56 and second chamber 58 through pressure compensator 66 (i.e. pipe compensator) and conduit 68. Second chamber 58 is hydraulically coupled with axial bore 42 (ie, PT production tube pressure) through one or more control devices, usually denoted by numeral 75 in Figure 2 and specifically. is illustrated as a flow restrictor 84 (e.g., orifice) in Figure 6 to create a temporary reference pressure against which to cycle operator chuck 54. In the embodiment depicted in Figure 6, first side 72 and second side 74 of operator chuck 54 has substantially the same open surface area for the respective first and second chambers, 56, 58, and therefore operator chuck 54 is a balanced piston.
    [0032] An example of a method of operating an actuator 12 and a downhole tool 30 is now described with reference to figures 1-3 and 6-7. After residence of the downhole tool 30 in wellbore 18 for a period of time, the pressure of the production tube PT and the pressure PI in the first chamber 56 and the second pressure P2 in the second chamber 58 equalize PT = Pl = P2. When pressure is equalized, tilt member 48 in the depicted embodiment locates operator chuck 54 in a first position. Operator chuck 54 is illustrated in the first position in Figure 6. When the pressure of the production tube PT is increased, the first pressure PI increases and flow restrictor 84 restricts the rate at which operating fluid 39 fills the second chamber 58, creating thus a temporary reference pressure in the second chamber 58 which is less than the pressure PI in the first chamber 56 and less than the pressure of the PT pipe. The temporary reference pressure is dependent on the pressure rate of change between the first chamber 56 and the second chamber 58. Operator chuck 54 moves in the second direction in response to the temporary differential pressure that is created during the increase in pressure of the tube. PT production. As operating fluid 39 continues to flow through flow restrictor 84, pressure equalizes in first chamber 56 and second chamber 58, PT = P1 = P2, with operator chuck 54 in second position. According to embodiments utilizing a resilient tilting member 48, operator chuck 54 can be driven in the first direction and back to the first position by tilting member 48.
    [0033] After reducing the pressure of the PT production tube, operating fluid 39 flows faster out of the first chamber 56 than it flows through the flow restrictor 84 and out of the second chamber 58, thus creating a reference pressure pressure in the second chamber 58 which is greater than the first pressure PI in the first chamber 56 and greater than the pressure of the production tube PT. Operator chuck 54 moves in the second direction in response to the temporary differential pressure created during pressure relief from the PT production tube. In this regard, manipulation of the production tube pressure indexes operator mandrel 54 up and down, creating a temporary reference pressure in the second chamber 58, thus eliminating the reliance on a separate reference pressure as a gas change. high pressure or the hydrostatic ring pressure 36.
    [0034] Figure 8 is a schematic diagram of a modality of a hydraulic circuit 38 according to one or more modalities of the hydrostatic pressure-independent actuator 12. Figure 9 illustrates a graphical representation of a pressure versus time response of the modality illustrated in Figure 8.
    [0035] Referring also to Figures 1 and 2, operator chuck 54 is illustrated as a piston, axially movable between a first position represented by first stop 76 and a second position represented by second stop 78. Operator chuck 54 is operatively connected with a counting mechanism 46. First side 72 of operator chuck 54 is open to first chamber 56 and second side 74 of operator chuck 54 is open to second section 58. Hydraulic circuit 38 is depicted as a system of closed loop containing working fluid 39. Axial bore 40 of production tube 32 is hydraulically coupled with first chamber 56 and second chamber 58 via pressure compensator 66 (i.e. pipe compensator) and conduit 68. Second chamber 58 is hydraulically coupled with axial bore 42 (ie, PT production tube pressure) through one or more control devices, usually denoted by numeral 75 in Figure 2 and specifically and illustrated as a pressure relief valve 80 and a check valve 82 (i.e., one-way valve) in Figure 8, for creating a temporary reference pressure against which to cycle operator chuck 54.
    [0036] In the embodiment depicted in Figure 8, an atmospheric chamber 86 is sealed between the first and second chambers 56, 58. First side 72 has a larger surface area than second side 74 and operator chuck 54 may be referred to as an unbalanced piston. Resilient tilting member 48 provides additional force to the second side 72 to install operator chuck 54 in the first direction. Operator chuck 54 is illustrated in Figure 8 in the first position. According to embodiments, first and second sides 72, 74 are dimensioned such that when the pressure P1 in the first chamber 56 and the pressure P2 in the second chamber are equal, operator chuck 54 is installed in the second direction and maintained in the second position, by example, position down. Check valve 82 allows pressure to equalize in chambers, 56, 58 during the pressure-increasing portion of pressure tube PT of the pressure cycle. In this sense, in a static position, for example when downhole tool 30 is resident in the wellbore for a period of time, the pressure in the first chamber 56 and second chamber 58 equalizes with the pressure of the PT production tube, or that is, PT = Pl = P2. In the static position, unbalanced operator chuck 54 is tilted to the second position located towards the second stop 78. Operator chuck 54 is illustrated in Figure 8 in the first position.
    [0037] An example of a method of operating an actuator mode 12 and a downhole tool 30 is now described with reference to figures 1-3 and 8-9. After residence in wellbore 18, pressure PI in the first chamber 56 and pressure P2 in the second chamber 58 equalize with pressure from the production tube PT and operator chuck 54 is moved towards the second position in response to the surface area of the first side 72 being greater than the surface area of the second side 74. For the cycle operator chuck 54 and the coupled counting mechanism 46, pressure from the PT production tube is manipulated by relieving the PT piping pressure and creating a temporary pressure differential between the first chamber 56 and the second chamber 58. As the pressure of the pressure tube PT is reduced, relief valve 80 maintains a back pressure in the second chamber 58, creating a temporary reference pressure in the second chamber 58 that is greater. than the first PI pressure and PT production pipe pressure. Operator chuck 54 moves in first direction in response to temporary differential pressure created. In this mode, a temporary reference pressure is created in the second chamber 58 during pressure of the production tube PT flowing down to cycle operator chuck 54 in the first direction. As the pressure of the PT production tube is increased again, the pressure will equalize in the first and second chambers 56, 58 and operator chuck 54 will again move in the second direction towards the second stop 78.
    [0038] The foregoing describes features of the various modalities of hydrostatic pressure independent actuators and methods so that those skilled in the art can better understand the aspects of the disclosure. Those skilled in the art should appreciate that they can easily use the disclosure as a basis for designing or modifying other processes and structures to accomplish the same ends and/or achieve the same advantages of the modalities presented in this document. Those of skill in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the disclosure, and that they may make various changes, substitutions and alterations to this document without departing from the spirit and scope of the disclosure. The scope of the invention is to be determined solely by the language of the following claims. The term "comprising" within the claims is intended to mean "including at least" such that the recited listing of elements in a claim is an open group. The terms "an", "an" and other singular terms are intended to include the plural forms thereof unless specifically excluded.
    权利要求:
    Claims (20)
    [0001]
    1. ACTUATOR, characterized in that it comprises: an operator (54) disposed in an actuator employed in a well system, the operator including an axial hole (42), a first side (72) in communication with a first chamber (56 ) inside the actuator, a second side (74) in communication with a second chamber (58) within the actuator, and a seal to maintain isolation of the first chamber from the second chamber through the operator, the operator moving axially in response to a differential pressure between the first chamber and the second chamber; a hydraulic circuit (38) hydraulically coupling the first chamber and the second chamber to the axial bore; a control device (75) hydraulically coupled between the axial bore and the second chamber, whereby the control device creates a temporary differential pressure between the first chamber and second chamber by manipulating a pressure in the axial bore, in which pressure manipulation of axial bore is an increase in axial bore pressure and decrease in axial bore pressure; and a tilting member that acts against the operator to tilt the operator in a desired direction.
    [0002]
    2. Actuator according to claim 1, characterized in that the control device maintains a pressure in the second chamber less than the pressure of the axial bore when the pressure of the axial bore increases.
    [0003]
    3. Actuator according to claim 1, characterized in that: the control device comprises one selected from a flow restrictor (84) and a pressure relief device (80); and the control device maintains a pressure in the second chamber less than the pressure of the axial bore when increasing the pressure of the axial bore.
    [0004]
    4. Actuator according to claim 1, characterized in that the control device maintains a pressure in the second chamber greater than the pressure of the axial hole when the pressure of the axial hole decreases.
    [0005]
    5. Actuator according to claim 1, characterized in that: the control device comprises one selected from a flow restrictor and a pressure relief device; and the control device maintains a pressure in the second chamber greater than the pressure of the axial bore when decreasing the pressure of the axial bore.
    [0006]
    6. Actuator according to claim 1, characterized in that: the control device maintains a pressure in the second chamber less than the axial bore pressure when increasing the axial bore pressure to move the operator in a first direction ; and the control device maintains a pressure in the second chamber greater than the axial bore pressure when decreasing the axial bore pressure to move the operator in a second direction.
    [0007]
    7. Actuator according to claim 1, characterized in that it comprises: the first side of the operator and the second side of the operator having substantially equal surface areas; and the control device maintains a pressure in the second chamber less than the pressure of the axial hole when increasing the pressure of the axial hole to move the operator in the second direction.
    [0008]
    8. Actuator according to claim 7, characterized in that the control device comprises one selected from a flow restrictor and a pressure relief device.
    [0009]
    9. WELL SYSTEM, characterized in that it comprises: a production tube (32) having an axial hole (42) disposed in the well hole (18); a downhole tool (30) operable from a first state to a second state implanted in the production pipe in the wellbore; an actuator (12) coupled to the downhole tool to change the state of the downhole tool, the actuator operated by pressure manipulation of the production tube in the axial bore, the actuator comprising: an operator (54) including a first side (72) exposed to a first chamber (56), and a second side (74) exposed to a second chamber (58), the operator providing a sealed barrier between the first chamber and the second chamber while being axially movable in response. at a differential pressure between the first chamber and the second chamber; a hydraulic circuit (38) hydraulically coupling the first chamber and the second chamber to the axial bore; and a control device (75) hydraulically coupled between the axial bore and the second chamber by means of a conduit driven externally from the operator, whereby the control device creates a temporary differential pressure between the first chamber and the second chamber in response to the manipulation of the pressure of the production tube.
    [0010]
    10. Well system according to claim 9, characterized in that: the control device maintains a pressure in the second chamber less than the pressure of the production tube when the pressure of the production tube increases; and the control device maintains a pressure in the second chamber greater than the pressure of the production tube when the pressure of the production tube decreases.
    [0011]
    11. Well system according to claim 9, characterized in that it comprises: an inclination member (48) inducing the operator in a first direction; the first operator side having a larger surface than the second operator side for moving the operator to a second position in response to equal pressure in the first chamber and the second chamber; and the control device maintains a pressure in the second chamber greater than the pressure of the production tube to move the operator in the second direction when the pressure of the production tube decreases.
    [0012]
    12. Well system according to claim 9, characterized in that it comprises: an inclination member inducing the operator in a first direction; the first operator side and the second operator side having substantially equal surface areas; and the control device maintains a pressure in the second chamber smaller than the production tube to move the operator in a second direction by increasing the pressure of the production tube.
    [0013]
    13. METHOD OF ACTION, characterized in that it comprises: the manipulation of a pressure of the production tube in an axial hole (42) of a tubular column (32) arranged in the well hole (18), comprising an actuator (12) having an operator (54) having a first side (72) open to a first chamber (56) and a second side (74) open to a second chamber (58), the first chamber and second chamber hydraulically coupled to the axial bore; tilting the operator in a desired direction with a tilt mechanism; creating a temporary differential pressure between the first chamber and second chamber by manipulating the pressure in the production tube by applying the temporary differential pressure through flow paths external to the operator; and the axial movement of the operator in response to temporary differential pressure.
    [0014]
    14. Method according to claim 13, characterized in that the second chamber is hydraulically coupled to the axial bore through a control device (75).
    [0015]
    15. Method according to claim 13, characterized in that the creation of a temporary differential pressure comprises maintaining the pressure in the second chamber at a value lower than the pressure of the production tube when the pressure of the production tube increases. production.
    [0016]
    16. Method according to claim 13, characterized in that the creation of a temporary differential pressure comprises maintaining the pressure in the second chamber at a value greater than the pressure of the production tube when the pressure of the production tube increases. production.
    [0017]
    17. Method according to claim 13, characterized in that it comprises: the axial movement of the operator in a first direction in response to maintaining a pressure in the second chamber at a value lower than the pressure of the production tube when it increases the pressure of the production tube; and the axial movement of the operator in a second direction in response to maintaining a pressure in the second chamber at a value greater than the production tube pressure when the production tube pressure decreases.
    [0018]
    18. Method according to claim 13, characterized in that it comprises: moving the operator to a second position in response to the fact that the pressure in the first chamber and the pressure in the second chamber are equal; and the axial movement of the operator in the first direction from the second position in response to maintaining a pressure in the second chamber at a value greater than the pressure in the production tube when the pressure in the production tube decreases.
    [0019]
    19. Method according to claim 13, characterized in that it comprises: the axial movement of the operator in a second direction in response to maintaining the pressure in the second chamber at a value lower than the pressure of the production tube when increasing the pressure of the production tube.
    [0020]
    20. Method according to claim 13, characterized in that it comprises: the axial movement of the operator in a second direction in response to maintaining the pressure in the second chamber at a value lower than the pressure of the production tube when increasing the production tube pressure; and wherein the second chamber is hydraulically coupled to the axial bore via a control device (75) selected from a flow restrictor (84) and a pressure relief device (80).
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    同族专利:
    公开号 | 公开日
    MY175201A|2020-06-15|
    BR112014011704A2|2017-05-30|
    AU2012339874A1|2014-05-29|
    WO2013074392A1|2013-05-23|
    AU2012339874B2|2017-03-09|
    GB2511952A|2014-09-17|
    GB2511952B|2019-05-29|
    US9074438B2|2015-07-07|
    US20130118758A1|2013-05-16|
    GB201408613D0|2014-06-25|
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    法律状态:
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-01-28| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-02-23| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-05-11| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 09/11/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201161560065P| true| 2011-11-15|2011-11-15|
    US61/560,065|2011-11-15|
    US13/668,688|2012-11-05|
    US13/668,688|US9074438B2|2011-11-15|2012-11-05|Hydrostatic pressure independent actuators and methods|
    PCT/US2012/064287|WO2013074392A1|2011-11-15|2012-11-09|Hydrostatic pressure independent actuators and methods|
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