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    • 专利摘要:
    VALVE ASSEMBLY FOR USE IN A WELL HOLE, AND METHOD FOR REGULATING A FLOW RATE IN A WELL HOLEA valve assembly to regulate the flow of fluid in a horizontal well bore. A housing can be attached to a production pipe. A chamber is defined within the housing and can be in fluid communication through a flow channel with an internal annular space formed adjacent to the well bore. A piston and a bias member can be arranged inside the chamber, where the bias member tends the piston to a first position. A flow path is defined within the housing and in communication with the production pipeline and also with an internal annular. The flow path can include one or more nozzles arranged therein and the piston can be configured to move between the first position allowing the flow of fluid through the flow path to the production pipeline and a second position preventing the flow of fluid for the production pipe.
    公开号:BR112012020028A2
    申请号:R112012020028-3
    申请日:2011-02-07
    公开日:2020-08-18
    发明作者:Terje Moen
    申请人:Prad Research And Development Limited；
    IPC主号:
    专利说明:

    EU) US ““ “MA“ “Ú ct” MOO Ru SS aa CCR —-— ..— 1%. VALVE ASSEMBLY FOR USE IN A WELL HOLE, AND METHOD 'FOR REGULATING A FLOW RATE IN A WELL HOLE
    BACKGROUND OF THE INVENTION | In recent years, development and installation | 5 of inflow control devices (in the acronym for inflow control devices, "ICD") have improved horizontal well production and the recovery of reserves in existing new hydrocarbon wells and hydrocarbon wells. "In reality, the technology ICD increased to the area - 10 of reservoir drainage, reduced occurrences of water and / or gas cone effects, and increased overall rates of hydrocarbon production, however, in the “longest, highly deviated horizontal wells, a continuing difficulty is the existence of non-uniform flow profiles along the extension of the horizontal section, especially close to the exhaustion of the well. variations in reservoir pressure and overall permeability of U hydrocarbon formation Non-uniform flow profiles can lead to premature eruption water and gas, sieve clogging and / or erosion in sand control wells, and can severely decrease the well's life and profitability. Similarly, in horizontal injection wells, O
    É Og, 0 pP 72 *% i0) - AA aê> AA aee rcCED S !!%: I & ó = 52 = -e = nl) - 1 -0 amu] Io Ó2 = M Nm "an a I'KIPPIEº É ) U ”ÔÉÂ.ÂÉAÓÔ ÔÔóPMÁ PÔ“ ÚÔ “” “rea. '2%' The same phenomenon applied inversely can result in the 'uneven distribution of injection fluids that leave parts of the reservoir unscrewed, thus resulting in a loss of recoverable hydrocarbons.
    Several smart completion methods too | were used to obtain uniform production / injection over the length of the horizontal well bore.
    One method includes using bottom flow control valves from | well, sophisticated are pressure / temperature measurements that allow depression and flow rate to be controlled from the various sections of the well bore. However, this typically requires hydraulic and / or electrical control lines that can limit the number of used valves and ultimately increase the overall cost of completion.
    Other methods attempted to install pre-assembled, fixed nozzles configured to provide a pressure drop between the reservoir and the production pipeline.
    Although each nozzle acts as a choke or valve that limits the flow rate through the system, they are completely passive and have limited control over the effective flow rate through them and cannot adjust to the choke dimension after completion is in the place. 'In addition, the pressure drop versus flow rate will typically vary in proportion to the degree of reservoir depletion.
    For example; an ICD completion may initially be optimal for hydrocarbon production,
    ris The "" p. *, >> 5th ". C99999.pÔ. “The RSS 3 Ss. but it may subsequently fail to perform optimally as the reservoir pressure runs out.
    Current ICD models fail to maintain a desired and consistent flow throughout the reservoir's depletion, and often results in a very high injection rate that results in an unwanted gas / water cone effect. | Figure 1 illustrates a conventional well completion set configured to remove oil or some other hydrocarbon fluid from an underground reservoir 102. Well hole 100 typically includes a coated, vertical section 104 joined in a "heel" 105 to a horizontal, uncoated section 106. A production pipeline 108 for transporting hydrocarbons, or other fluids, to the surface of the borehole 100 is disposed within the coated borehole section 104 and extends from the surface of the borehole well 100 through heel 105 and up to an "end" 116. A packer 110 or other component to seal an annular area or annular space of well bore 112 around production pipe 108 is typically used to insulate the section. horizontal 106 below that place.
    A set of completely 114, such as a sand sieve or perforated pipe, is usually attached to the production pipe 108 to allow flow and influx of fluids through it.
    During production, pressure variations in the s - reservoir and pressure drop inside the borehole 100 | 'can cause fluids to be produced or injected at non-uniform rates. This can be especially problematic in longer horizontal wells where the pressure drop along the horizontal section 106 of the well hole 100 causes maximum pressure drop in the heel 105 of the well hole 100 (closer to the vertical or near vertical part 104) making causing the heel 105 to produce or accept injection fluid at a higher rate than at the end 116 of the well bore 100 (furthest from the vertical or near vertical offset point).
    There is therefore a need for a flow control device for use in a well bore that compensates for changes and dynamic differences in fluid pressure along the length of the well bore. There is also a need for flow control equipment that is self-regulating and that automatically adjusts to changes in pressure differentials between the hydrocarbon formation and the production pipeline,
    SUMMARY OF THE INVENTION z Valve assemblies are provided for regulating the. fluid flow in a horizontal well bore and methods for using them. In at least one specific embodiment, the valve assembly may include a housing coupled to a production pipe, a chamber
    $: defined inside the housing and in fluid communication 'through a flow channel with an internal annular space formed adjacent to the well hole.
    The valve assembly may further include a piston and a bias member 5 arranged inside the chamber, where the bias member is adapted to propel the piston to a first position, and a defined flow path within the housing and 'communicable with both , production piping and internal annular space, The flow path can include one or more nozzles arranged there, and the piston can be configured to move between the first position allowing fluid flow through the flow path to the flow pipe. production and a second position preventing | the fluid flow to the production pipeline.
    In another embodiment, the valve assembly may include a housing coupled to a production pipe, and a chamber defined within the housing and having a first end in fluid communication with an internal annular space through a flow channel and a second end in fluid communication with the pipeline. through a ventilation channel.
    The valve assembly may also include a flow path within the | housing that is in fluid communication with both the internal annular space and the production pipe through the chamber.
    A nozzle can be arranged inside the
    O! 0 iu pv. y1a rn * VS5E: = "22 2,.) 2., + 9]) 2- Ps -crisss da n Aa EIÍIÍ EN" AA MSiMGM SAMMY MAIN race it] 6 v 2 flow path adjacent to the production pipe, and a 'piston can be arranged inside the chamber and adapted to move radially with respect to the production pipeline, the piston having a pressure end, a bias end, and a central portion of reduced cross section disposed between the pressure ends and of propensity. The valve assembly may also include a biasing member disposed within the second end of the chamber to propel the piston to a first position. The piston can be configured to move between the first position allowing fluid to flow through the flow path to the production line and a second position preventing the flow of fluid to the production line.
    In at least one specific embodiment, the method may include placing a valve assembly in a well bore, where the valve assembly has a housing defining a chamber in fluid communication through a flow channel with an internal annular space formed adjacent to the well bore. The method also includes making: a fluid flow through the valve assembly through a flow path in communication of fluid i with a production pipe and the internal annular space, and causing the fluid to act on a piston by through a flow channel in fluid communication with the internal annular space. The piston can be extended
    :: 7. to a first position using a propensity member Ú disposed inside the chamber.
    The method also includes moving the piston axially inside the chamber to a second position to throttle the flow rate through the valve assembly. | In another embodiment, the method may include placing a valve assembly in a borehole, where the valve assembly has a piston disposed within a chamber and the piston has a pressure end, a bias end, and a central portion of reduced cross section disposed between the pressure and bias ends.
    The method also includes making a fluid flow through the valve assembly through a flow path that is in fluid communication with a production pipe and the well bore through the chamber.
    The flow path can have at least one nozzle arranged in that place adjacent to the production pipeline.
    The fluid can then act on the pressure end of the piston through a flow channel in communication with the well bore.
    The method also includes propelling the piston to a first position within the. chamber using a spring against the biasing end, and move the piston inside the chamber towards a second position to throttle the flow rate through the valve assembly.
    : 8: ç BRIEF DESCRIPTION OF THE DRAWINGS 'In order that the characteristics cited can be understood in detail, a more specific description, briefly summarized above, can be obtained by reference to one or more modalities, some of which are illustrated in the attached drawings. It should be noted, however, | that the attached drawings illustrate only typical modalities and, therefore, should not be considered as limiting its scope, since the invention can admit other equally effective modalities.
    Figure 1 schematically illustrates a conventional well completion set configured to remove oil or some other hydrocarbon fluid from a horizontal well bore 100.
    Figure 2 illustrates a partial cross-sectional view of an illustrative valve assembly in an open position, according to one or more of the described modalities. Figure 3 illustrates a sectional view through lines 3-3 shown in Figure 2.
    Figure 4 shows a partial cross-sectional view of the valve assembly shown in Figures 2 and 3, i in a closed position, according to one or more of the described modalities.
    Figure 5 illustrates a sectional view through | lines 5-5 shown in Figure 4 of the valve assembly in
    The NE. a closed position. 'Figure 6 illustrates a cross-sectional view | partial of another illustrative valve assembly in an open position, according to one or more of the described modalities, Figure 7 illustrates a valve assembly of Figure 6 in a closed position.
    DETAILED DESCRIPTION Figure 2 illustrates a partial cross-sectional view of a valve assembly or ICD 200, illustrative according to one or more embodiments. Valve assembly 200 can be configured to respond to pressure variations between the interior of production piping 208 and annular well-hole space 201. As illustrated, valve assembly 200 can include an inner body 202 having an outer piping Or housing 204 arranged around it, defining a chamber 214 between them. The valve assembly 200 may be arranged in the production line 208 or otherwise attached to it. For example, the inner body 202 may be - coupled or otherwise attached to the outer surface of the. production piping 208. External piping 204 may be coupled or otherwise attached to completion set 215 at its first end 206; and also coupled to production pipe 208 at a second end 207, In one or more embodiments, the inner body 202 and the
    | 10. outer piping 204 may form a monolithic 'or one-piece housing that can be coupled or otherwise attached to production piping 208, In at least one embodiment, completion set 215 may include a sand sieve, as known in technique, which defines an internal annular space 210, radially displaced from the production pipe 208, The «internal annular space 210 can be concentric with both, the annular space of well bore 201 surrounding the completion set 215 and the production 208. In one embodiment, completion set 215 can be omitted completely so that valve set 200 is placed in direct communication with annular well space 201. A piston 212 or another axially movable member can be arranged in the chamber 214 defined between inner body 202 and outer piping 204. The general shape of piston 212 can be substantially cylindrical and configured to correspond to a substantial chamber cylindrical 214. As can be considered, however, piston 212 and chamber 214 may include other corresponding shapes, including elliptical, oval, rectangular or square configurations, without departing from the scope of the disclosure, Camera 214 may be in communication fluid with the internal annular space 210 (for example, the upstream side) through a flow channel 216. In action ii 4 * SXADA iu 2 242 si 1 Q 2 a uY--0.:—EW wP “nú -âS SRNAÔÔº ““ “mf it Mrs. Rn SS SS SS SS SR SN RR € 11 '. at least one embodiment, piston 212 may have a first end or throttle end 218 and a second end or bias end 220. The throttle end 218 may be tapered to include a sealing surface 219 configured to engage a seat or correspondingly tapered surface: 221. As illustrated, the tapered surface 221 can be formed on the outer surface of the inner body 202 and the inner surface of the outer pipe 204. Although the general arrangement of the housing (i.e., the OO] inner body 202 and the tubing external 204) and the piston | 212, as shown in Figure 2, is axially aligned with production pipe 208, other arrangement configurations are equally viable and are also within the scope of the disclosure.
    For example, the combination housing (i.e., the inner body 202 and the outer piping 204) and the piston 212 can also be oriented radially or tangentially with respect to the production piping 208, and yet operate properly as described herein,. A bias member 222 may also be disposed within chamber 214. Bias member 222 may be a spring, diaphragm, or other axially expandable devices configured to propose piston 212 to a first or "open" position within the chamber 214, as shown in Figures 2 and 3. For example, ei OO BONE A OA A ÚMÓA OO aa Na —— 2 12 '. bias member 222 can be configured to push 'over or against a first end or bulkhead 224 of piston 212, adjacent to bias end 220 of piston 212, to bias the piston to the first position.
    In one or more embodiments, the portion of the chamber 214 that houses the bias member 222 can be vented through holes or ducts defined in the piston bulkhead 224. Consequently, the bias member 222 may be in fluid communication with the annular space. | 10 inner 210 through bulkhead 224 and flow channel 216. A substantially cylindrical sealing surface 226 can be defined between inner body 202 and outer piping 204. In one or more embodiments, the sealing surface 226 can have a internal diameter configured to seal the outer diameter of piston 212 when piston 212 moves axially back and forth inside chamber 214. Although not shown, piston 212 may also include a sealing device, such as a O-ring or diaphragm, arranged around it to seal the sealing surface 226 during translation of piston 212, thereby preventing the crucial leakage flow around piston 212. As a result of the friction created by the engagement seal, an O-ring or diaphragm could potentially replace bending member 222,
    MM | 13: one less modality.
    'During operation, piston 212 can be adapted to react or respond to pressure variations occurring between the internal annular space 210 (for example, the upstream side) and the production pipe 208 (for example, the downstream side) . For example, piston 212 can be configured to move axially within chamber 214 to regulate the flow of fluids through an inlet conduit 228 in response to the pressure differential experiencing between upstream and downstream pressures. As can be considered, the relative arrangement of the sides, upstream and downstream, can be reversed in the modalities involving the injection of fluids from the production pipe 208 into the annular space of the surrounding borehole 201, as for applications of well-hole simulation.
    Referring to Figure 3, conduit 228 may include one or more nozzle openings 230 (two are shown) in fluid communication with the internal annular space 210, or the annular borehole space 201 in applications where there is no set of completion 215. Each nozzle opening 230 may include one or more nozzles 232 i arranged at least partially there. In operation, nozzles 232 help provide a controlled pressure drop through each nozzle opening 232. In one or more embodiments, nozzles 232 can be replaced by ni N5 A “ÚÊ% MPÂÚrúº» Pº * º- ÃO PA P “º“ ºO9.8R ”to ºPºO9º9 l9ooõor O OO ——— '14. reduced area piping, a tortuous flow path 'or similar device that also serves to regulate or control the pressure drop. Inlet conduit 228 may be in fluid communication with one or more outlet conduits 234 that are in | fluid communication with production piping 208. Thus, inlet conduit 228 and outlet conduit 234 can form a continuous flow path through: chamber 214. In operation, valve assembly 200 can be configured to use the pressure differential between pressures, upstream and downstream, through piston 212 to automatically adjust the flow rate through inlet and outlet ducts 228, 234. For example, a fluid can flow from the annular bore space well 201, through completion set 215 (for example, a sand sieve), and into the inner annular space 210 of valve assembly 200, The inner annular space 210 can simultaneously feed the fluid into the (s) nozzle opening (s) 230 and flow channel
    216. Fluid entering flow channel 216 can provide a force in the unventilated portion of the 'propensity 220' end of piston 212. As fluid flows through nozzle (s) 232, a pressure drop is generated, thereby creating a pressure differential through piston 212, between the
    DO O + 15 | : internal annular space 210 and the inside of the production line 208. The increase in differential pressure proportionally increases the force applied to the unventilated portion of the propensity end 220 of piston 212 through the fluid from flow channel 216. Consequently , the piston 212 is forced to move axially towards the sealing seat 221, thereby engaging the bias member 222 which exerts a force in the opposite axial direction.
    If the pressure drop continues to increase, fluid pressure through flow channel 216 can, in due course, overcome the bias force of bias member 222 and force piston 212 towards sealing seat 221 and eventually to a second position or "closed" position as shown in Figures 4d4e5., More specifically, Figure 4 illustrates the valve assembly 200 shown in Figure 2 in the closed position, and Figure 5 illustrates the valve assembly 200 shown in Figure 3 in closed position.
    As Piston 212 moves towards sealing seat 221, the throttle end 118 of piston 212 begins to throttle, restrict, or otherwise regulate the flow of fluid through the duct (s): inlet 228 , thereby reducing the flow rate of fluids through outlet conduit 234. Regulation of fluid flow through inlet conduit 228 may result in an increased pressure drop through piston 212. A
    R 1%. increased pressure drop can generate a high closing force that increasingly drives the sealing surface 219 against the sealing seat 221 and to the closed position, thereby restricting or completely preventing any flow of fluid through the conduit (s) ) inlet 228. Until pressures at the sides, upstream and downstream, are equalized or at least decrease to one | point where the bias force of the bias member 222 can move piston 212 towards the open position, Piston 212 will remain in the closed position, thus forcing | the fluids that arrive from the annular space of the surrounding borehole 201 to other portions of the production pipe 208. This can prove to be advantageous during the | production operations that approach reservoir depletion where an undesirable gas / water cone effect in the more permeable areas of the reservoir, that is, where the fluid flow may be greater, is generally avoided or prevented. In another embodiment, piston bulkhead 224 can be a solid structure and be configured to seal the inner surface of chamber 214 in a sealed manner instead of allowing the fluid to be vented to the propensity member 222. In addition, to the surface substantially cylindrical seal 226 may include an internal diameter adapted to provide fluid flow or ventilation around the throttle choke end 218 o 5. nn nu un çeennNn Nun Ia-EEorMCÇN AOOA * 17. 212 is for the portion of Chamber 214 that houses the member of: bias 222. In other words, the outside diameter of piston 212 and the sealing surface 226 can together define a large annular gap between them where the fluid can enter and exit the chamber 214 thus ventilating the bropension member 222. As can be considered, this may allow the hydraulic pressure in the flow channel 216 to act on the entire surface area of the propensity end 220 of piston 212. This configuration may also allow a equal and opposite surface area of piston 212 is initially actuated by the pressures incident downstream of nozzles 232 on the opposite side of piston 212 (for example, including the combined surface areas | of the throttle end 218, sealing surface 219, and the internal piston forehead 224, adjacent to the propensity member 222). In this modality, when a fluid flows through the nozzle (s) 232 from the internal annular space 210, a pressure drop is generated, thus creating a pressure differential through piston 212 between the annular space of the borehole 201 (for example, the internal annular space 210) and the production pipeline 208. This differential pressure 'increases to pressure acting on the entire surface area of the propensity end 220 of piston 212 through flow channel 216. The differential pressure crescent can force piston 212 towards the seat of po Soo, V — RTUNA ANA 0 [l 9 .p e. aaa wi ç ni 202 / 5Im- 00..2! * P onSMX. o SA + 18 seal 221, thereby engaging and compressing the 'propensity member 222. As piston 212 moves towards seal seat 221, fluid flow through inlet conduit 228 is strangled, thereby reducing al 5 flow rate through outlet duct 234 and further increasing the differential pressure. As can be seen, how fluid pressures are acting on | equal but opposite surface areas of piston 212, o | piston 212 can act somewhat like an automatic regulating flow valve adapted to maintain the flow rate balance through the valve assembly
    200. Additionally, by changing piston area 212 it is manipulation of the elasticity constant of the bending member 222, and valve assembly 200 can be designed to close at a predetermined flow rate and pressure drop. If the pressure drop continues to increase, the fluid pressure through flow channel 216 will eventually overcome the combined bias forces of bias member 222 and the fluid forces acting on the opposite side of piston 212 (for example, including | combined surface areas of the end of a choke 218, sealing surface 219, and the piston shield 224 adjacent to the propeeming member 222), thereby forcing piston 212 further towards the sealing seat 221. When the
    : 19: throttle 218 approaches seal seat 221, differential pressure is increased through seal seat 221, thus providing added closing force on piston 212. | Figure 6 shows a cross-sectional view | part of another set of valve or ICD 600, illustrative, according to one or more modalities. Valve assembly 600 is similar in some respects to valve assembly 200 described above with reference to Figures 2-5. Consequently, valve assembly 600 can be better understood with reference to Figures 2-5, where similar numerals are used to indicate similar components and, therefore, will not be described in detail again.
    Valve assembly 600 can be configured to respond to pressure variations between production piping 208 and well bore annular space 201, in combination with the specific flow rate of the fluid through. valve assembly 600, As illustrated, valve assembly 600 may include an external distribution box or housing 602 coupled or otherwise attached to production piping 208 and completion set | 215. A piston 604 or another movable member can be arranged inside the chamber 606 defined in the external distribution box 602: The general shape of the piston 604
    20
    . it can be substantially cylindrical and configured to correspond to a substantially cylindrical chamber 606. As can be considered, however, piston 604 and chamber 606 can include other corresponding shapes, including elliptical, oval, rectangular or square configurations.
    In one embodiment, piston 604 can be movable within chamber 606 in a direction substantially perpendicular (i.e., radial) to the axial length of production pipe 208. The general shape of piston 604 can be adapted to engage in a sealed manner the inner walls of chamber 606 during movement or translation of piston 604. In other embodiments, piston 604 or chamber 606 may include one or more members or sealing devices, such as an O-ring (in the English term, “O- ring ”) or a diaphragm to reduce critical fluid leakage between piston 604 and chamber 606. Although the general arrangement of housing 602 and piston 604, as shown in Figure 6, is generally aligned radially with the production piping 208 , other configurations are considered here without departing from the scope of the disclosure.
    For example, piston 604 can also be oriented either axially or tangentially 'with respect to production piping 208, and yet still operate properly as described herein.
    In one or more modalities, piston 604 can be configured to move axially inside chamber 606, with respect to the NN-AAÃAUaN A “APA Â ÓÔA.% 2C2. 2 .OUO “Á“ OCc mm CCC, 1 21: 208 production piping.
    The piston 604 can include a first pressure end or end 608 and a second end or end of propensity 610, with a valve stem 612 disposed between them. In at least one embodiment, valve stem 612 may be tapered or otherwise formed cylindrically to enable less turbulent fluid flow around valve stem 612 during operation. The pressure end 608 can be arranged adjacent or otherwise in fluid communication with a flow channel 614 which communicates fluid with the internal annular space 210 (e.g., the upstream side). Conversely, the propulsion end 610 can communicate with the production piping 208 (for example, the downstream side) by means of a ventilation channel 616 defined in the production pipeline 208. As can be considered, the relative arrangement from the sides, upstream and downstream, it can be inverted, for example, in modalities involving the injection of fluids from the production pipe 208 into the annular well-hole space surrounding 201 for well-hole stimulation applications.
    Valve assembly 600 may also include a first inlet or outlet 618 and a second inlet or outlet conduit 620. Inlet 618 may be in fluid communication with the annular space in the SY “Am SS ao iii and 22 in . internal 210 (for example, annular well hole space 201) and chamber 606, and outlet conduit 620 may be in fluid communication with chamber 606 and production piping 208. Consequently, inlet conduits and from | 5 outlet 618, 620 are in fluid communication via chamber 606, thereby forming a path | flow through the external distribution box | 602, or accommodation.
    In one embodiment, the outlet duct 620 may include one or more nozzles 622 (a nozzle is shown) arranged at least partially there and proximal to the inner surface of the production pipe 208. The nozzle (s) 622 helps to generate a controlled pressure drop through valve assembly 600. In one or more modes, nozzle (s) 622 can be replaced with reduced area piping, a tortuous flow path, or similar devices configured to regulate or control the pressure drop.
    A bias member 624 may also be disposed within chamber 606. Similar to bias member 222 described above with reference to Figures 2-5, bias member 624 may be a spring, diaphragm, or eutral | axially expandable device.
    In operation, biasing member 624 can be configured to bias or otherwise compel piston 604 to a first position or "open" position within chamber 606, as shown in i 23 & - illustrated in Figure 6. The open position may include a valve stem 612 being centrally located between the inlet and outlet ducts 618, 620, thereby allowing the flow of fluid around valve stem 612 from the inlet duct 618 to the outlet duct 620, or vice -version. As shown in Figure 7, Piston 604 is in a second or "closed" position when the pressure end 608 of piston 604 substantially limits or prevents the flow of fluid between the inlet and outlet ducts 618, 620. As you can see To be considered, between the first and the second position, there are 1 various variable positions configured to odd, limit, or otherwise regulate the fluid flow to varying degrees between the inlet and outlet conduits 618, 620. During operation, the valve assembly 600 reacts to the pressure differential between upstream and downstream pressures through piston 604 and adjusts autonomously to the fluid flow rate through inlet and outlet ducts 618, 620. In one or more modalities, the fluid can be poured through the completion set 215 and into the internal annular space 210. The annular space: internal 210 can simultaneously feed the fluid into both, flow channel 614 is the cond input uto
    618. Through flow channel 614, the fluid pressure acting on the pressure end 608 of the piston
    . 604 is at least partially displaced by the combined bias forces of bias member 624 on bias end 610 and the fluid pressure in pipeline 208 acting on bias end 610 via vent 616. In one embodiment , these combined forces serve to hold piston 604 in the first position, thereby allowing fluid to flow through inlet conduit 618, around valve stem 612 located in chamber 606, and into outlet conduit 620. When the fluid flows through the nozzle (s) 622, a pressure drop is generated, thereby creating a differential pressure through the piston 604 between the internal annular space 210 (for example, the upstream side) and the production 208 (for example, the downstream side). An increase in differential pressure can increase the pressure of fluid incident on the pressure end 608 of piston 604, thereby increasing the force on piston 604 that opposes bias member 624. If the pressure drop continues to increase, the pressure fluid flow through flow channel 614 can ultimately overcome the combined bias forces of bias member 624 and fluid pressure downstream through vent 616, thereby forcing piston 604 towards the second position or "closed" position "as shown in Figure 7. As piston 604 moves towards the
    Mp Aaa: 8 Eu A PÓÁÉOÀ »yX — yÇ3Pe $,“> 5M mPº “9“ ““ io ““ OO OAAA WALKING RAD »: second position it strangles or limits the flow of fluid Ú through the flow path, that is , between inlet and outlet ducts 618, 620. As can be seen, the throttling of the fluid flow rate can result in an increased pressure drop through piston 604. Increased pressure drop increases the compressive force applied against the bias member 624 at the bias end 608 which further drives piston 604 to the second position where fluid flow is substantially restricted or impeded through outlet duct 620.
    'Until the pressures on the sides, upstream and downstream, are equalized, OR at least lessen to a point where the combined bias forces of bias member 624 and the fluid pressure downstream through vent 616 can once again force piston 604 towards the open position, piston 604 will remain in the closed position. While in the closed position, piston 604 forces incoming fluids derived from the annular space of well bore 201 to other areas of production pipe 208, thereby preventing the effect of a cone in any specific area along the length of production pipe 208 During operations: production that approaches reservoir depletion levels, this can prove to be useful in preventing the unwanted gas / water cone effect in the more permeable areas of the reservoir, where fluid flow can be
    TOS |) 525M5 ”PA .sl <12, [a nan ns nun S) óAruaaA-". 9)>> 55A ARA AÀAÍSAs “P! MBtteºMúfxÔÔOAAAAASAitêT iii”, o A PA o RARE 26 BR larger, 'As can be considered , in cases where the pressure drop across piston 604 fails to force piston 604 completely to the closed position, the combined forces of bias member 624 and the forces against piston 604 at both ends, pressure and bias 210 , 212 can, in due course, reach an equilibrium. In other words, valve assembly 600 can behave somewhat like an automatic regulating flow valve adapted to maintain flow rate balance through valve assembly 600 based on the pressures on both, internal annular space 210 and production piping 207. Additionally, by changing piston area 604 and manipulating the elasticity constant of bias member 624, the valve assembly 600 can be designed to close at a flow rate o and pressure drop, predetermined.
    In one or more embodiments, completion set 215 may include two or more ICDs each having two or more valve sets 200, 600; as generally described herein; distributed around | production line extension 208. One or more seals: can be used between completion sets 215 and / or between valve sets 200, 600 to provide individual or separate compartments, or “zones”. In the case of a first fluid flow into one or more and - the first zones, and a second fluid flow into | 'one or more second zones, under pressure in the annular space of wellbore 201 may change proportionally to the initial pressure in the first zone) in relation to the pressure in the second zone (s). As can be considered, if the second fluid has a different viscosity or density than the first fluid, the drop pressure across the reservoir will be different for the same flow rate. As described here, flow control sets 200 and 600 can be configured to generate a controlled pressure drop, thereby providing a fluid flow to the pipe of production regardless of the types or rates of fluid flow through it. For example, if a second fluid has a greater reduction in viscosity than an eventual reduction in density, the pressure drop across the reservoir will be relatively less than the pressure drop across valve assembly 200,
    600. With the controlled pressure drop created by nozzles 232, 622, the internal pressure in production pipe 208 will remain almost constant. This pressure drop i increased through the set 200, 600 will cause the closure: it will consequently prevent the second fluid from entering the production line 208. It should now be evident that the valve set 200, 600 can provide a constant flow or predetermined
    '28 throughout the depletion of a Cv hydrocarbon reservoir along the length of the production pipeline 208, thus resulting in optimal hydrocarbon recovery. the valve assembly 200, 600 can also be used for controlled injection operations to reduce and / or eliminate inconsistent fluid injection into the annular wellbore space 201 along the length of the production pipe 208. In addition, by changing of various parameters, such as piston surface area 212, 604, flow channel circumference 216, 614, chamber hole size 214, 606, etc., dependence on flow rate through each set of valve 200, 600 versus dependence on differential pressure can be freely adjusted to meet the limitations of specific applications.
    Several terms have been defined above. To the extent that a term used in a claim is not defined above, it must be given the broadest definition that those skilled in the art have given to that term as reflected in at least one printed publication or issued patent. In addition, all patents, testing procedures and other documents cited in that application are: fully incorporated by reference to the extent that such disclosure is not inconsistent with that application and for all jurisdictions in which such | incorporation is allowed.
    : 29. Although the precedent is directed to the modalities of: .present invention, | other and additional embodiments of the invention can be designed without departing from its basic scope, and its scope is determined by the following claims. ''
    权利要求:
    Claims (18)
    [1]
    1. VALVE ASSEMBLY FOR USE IN A WELL HOLE, characterized by comprising: a housing coupled to a production pipe; a chamber defined within the housing and in fluid communication through a flow channel with an internal annular space formed adjacent to the well bore; a piston and a bias member disposed within the chamber, the bias member being adapted to propose the piston to a first position; and a flow path defined within the housing and communicable with the production pipe and the internal annular space, in which the flow path comprises one or more nozzles arranged therein and the piston is configured to move between the first position allowing flow of fluid through the flow path to the production line and a second position preventing the flow of fluid to the production line.
    [2]
    Valve assembly according to claim 20, characterized in that the housing comprises. an internal body coupled to the production pipeline and an external distribution box arranged around the internal body.
    [3]
    Valve assembly according to claim 1, characterized in that the biasing member is a spring.
    [4]
    Valve assembly according to claim 1, characterized in that the biasing member is a diaphragm.
    [5]
    5. Valve assembly according to claim 1, characterized in that the internal annular space is defined by a sand sieve arranged around the production pipe.
    [6]
    6. Valve assembly, according to claim 1, characterized by further comprising: a ventilated bulkhead coupled to the piston to allow the propensity member to be in fluid communication with the internal annular space through the flow channel; and a sealing surface defined by the housing for sealingly engaging the external surface of the piston when the piston moves between the first and second positions.
    [7]
    Valve assembly according to claim 1, further comprising: a bulkhead coupled to the piston to seal the inner surface of the chamber in a sealed manner when the piston moves between the first and second positions; and a sealing surface defined by the housing downstream of one or more nozzles, on which the sealing surface is adapted to ventilate the chamber where the bending member is arranged.
    [8]
    Valve assembly according to claim 1, characterized in that the fluid flows from the well bore to the production pipeline.
    [9]
    Valve assembly according to claim 1, characterized in that the fluid flows from the production pipe and into the well bore.
    [10]
    10. METHOD FOR REGULATING A FLOW RATE IN A WELL HOLE, characterized by comprising: adapting a valve set in the well hole, the valve set having a housing defining a chamber in fluid communication through a flow channel with an internal annular space formed adjacent to the well bore; causing a fluid to flow through the valve assembly through a flow path in fluid communication with a production pipe and the internal annular space, the flow path having one or more nozzles arranged therein; causing the fluid to act on a piston by '20 through a flow channel in fluid communication' with the internal annular space, the piston being disposed within the chamber; propel the piston to a first position using a propensity member disposed within the chambers; and transfer. axially the piston inside the chamber towards a second position to throttle the flow rate through the valve assembly.
    [11]
    Method according to claim 10, characterized in that it further comprises: ventilating the fluid biasing member from the internal annular space through a ventilated shield coupled to the piston; and sealingly engaging an external surface of the piston to seal the surface defined by the housing when the piston moves between the first and second positions.
    [12]
    Method according to claim 10, characterized in that it further comprises: sealingly engaging a piston bulkhead to an internal surface of the chamber when the piston moves between the first and second positions; and venting the fluid biasing member through a gap formed between the sealing surface defined by the housing downstream of one or more '20 nozzles and an external piston diameter.
    [13]
    Method according to claim 10, characterized in that it further comprises pulling in the fluid from a surrounding hydrocarbon reservoir through a sand sieve coupled to the valve assembly.
    [14]
    14. VALVE ASSEMBLY FOR USE IN A WELL HOLE, characterized by comprising: a housing coupled to a production pipe; a chamber defined within the housing and having a first end in fluid communication with an internal annular space through a flow channel and a second end in fluid communication with the production pipe through a ventilation channel; a defined flow path within the housing through the chamber to place the internal annular space in fluid communication with the production pipeline; a nozzle disposed within the flow path adjacent to the production pipeline; a piston disposed within the chamber and adapted to move radially with respect to the production pipeline, the piston having a pressure end, a bias end, and a central portion of reduced cross section disposed between the pressure and bias ends; and 'a bias member disposed adjacent to the second end of the chamber and adapted to propel the piston to a first position, wherein the piston is configured to move between the first position allowing the flow of fluid through the flow path to the production pipe and a second position preventing the flow of fluid to the production pipe.
    [15]
    Valve assembly according to claim 14, characterized in that the biasing member is a spring.
    o 1 - "s. - CLAIMS -
    1. VALVE ASSEMBLY FOR USE IN A WELL HOLE, characterized by comprising: a housing coupled to a production pipe; a chamber defined within the housing and in fluid communication through a flow channel with an internal annular space formed adjacent to the well bore; a piston and a bias member disposed within the chamber, the bias member being adapted to propose the piston to a first position; And a flow path defined within the housing and communicable with the production pipeline and the internal annular space, in which the flow path comprises one or more nozzles arranged in it and the piston is configured to move between the first position allowing flow of fluid through the flow path to the production pipeline and a second position preventing the flow of fluid to the production pipeline.
    Valve assembly according to claim 1, characterized in that the housing comprises an internal body coupled to the production piping and an 'external distribution box arranged around the internal body.
    Valve assembly according to claim 1, characterized in that the biasing member is a spring.
    :: 2 ot. 4, Valve assembly, according to == | claim 1, characterized in that the biasing member is a diaphragm.
    Valve assembly according to claim 1, characterized in that the internal annular space is defined by a sand sieve arranged around the production pipe.
    6. Valve assembly according to claim 1, further characterized by: a ventilated bulkhead coupled to the piston to allow the propensity member to be in fluid communication with the internal annular space through the flow channel; and a sealing surface defined by the housing for sealingly engaging the external surface of the piston when the piston moves between the first and second positions.
    T. Valve assembly according to claim 1, further comprising: a bulkhead coupled to the piston to seal the inner surface of the chamber in a sealed manner when the piston 'moves between the first and second positions; and "a sealing surface defined by the housing downstream of one or more nozzles, on which the sealing surface is adapted to ventilate the chamber where the bending member is arranged.
    “. - 8. Valve assembly, according to a: claim 1, characterized in that the fluid flows from the well bore and into the production pipeline. Valve assembly according to claim 1, characterized in that the fluid flows from the production pipe and into the well bore.
    10. METHOD FOR REGULATING A FLOW RATE IN A WELL HOLE, characterized by comprising: adapting a valve set in the well hole, the valve set having a housing defining a chamber in fluid communication through a flow channel with an internal annular space formed adjacent to the well bore; causing a fluid to flow through the valve assembly through a flow path in fluid communication with a production pipe and the internal annular space 1, the flow path having one or more nozzles arranged therein; ; causing the fluid to act on a piston through a flow channel in fluid communication with the internal annular space, the piston being disposed within the chamber; Í propose the piston to a first position using a bias member arranged inside the chambers; and move the piston axially inside the chamber in
    How to move to a second position to strangle the rate of flow through the valve assembly.
    Method according to claim 10, characterized in that it further comprises: ventilating the fluid biasing member from the internal annular space through a ventilated shield coupled to the piston; and sealingly engaging an external surface of the piston to seal the surface defined by the housing when the piston moves between the first and second positions.
    12. Method according to claim 10, | characterized by also comprising: a piston bulkhead sealed to an internal chamber surface when the piston moves between the first and second positions; and venting the fluid biasing member through a gap formed between the sealing surface defined by the housing downstream of one or more nozzles and an outside diameter of the piston.
    Method according to claim 10, characterized in that it further comprises pulling in the fluid from a surrounding hydrocarbon reservoir through a sand sieve coupled to the valve assembly.
    14. VALVE ASSEMBLY FOR USE IN A 5 * HOLE. 2 WELL, characterized by comprising: 'a housing coupled to a production pipe; a chamber defined within the housing and having a first end in fluid communication with an internal annular space through a flow channel and a second end in fluid communication with the production pipe through a ventilation channel; a defined flow path within the housing through the chamber to place the internal annular space in fluid communication with the production pipeline; a nozzle disposed within the flow path adjacent to the production pipeline; a piston disposed within the chamber and adapted to move radially with respect to the production pipeline, the piston having a pressure end, a bias end, and a central portion of reduced cross section disposed between the pressure and bias ends; and a bending member disposed adjacent to the second É Pá end of the chamber and adapted to propel the piston * to a first position, in which the piston is arranged to move between the first position allowing the flow of fluid through the flow path to to the production pipeline and a second position preventing fluid flow to the production pipeline.
    . i 6
    NS E *. Valve assembly according to VI or claim 14, characterized in that the biasing member is a spring.
    [16]
    Valve assembly according to claim 14, characterized in that the internal annular space is defined by a sand sieve arranged around the production pipe.
    [17]
    Valve assembly according to claim 14, characterized in that the chamber and the piston are substantially cylindrical.
    [18]
    18. Valve assembly according to claim 17, characterized in that the chamber engages in a sealed manner on an external surface of the piston.
    «
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    法律状态:
    2020-08-25| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-12-08| B11B| Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements|
    2021-11-03| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    优先权:
    申请号 | 申请日 | 专利标题
    US30399910P| true| 2010-02-12|2010-02-12|
    US30411610P| true| 2010-02-12|2010-02-12|
    US61/304,116|2010-02-12|
    US61/303,999|2010-02-12|
    US13/021,277|US8752629B2|2010-02-12|2011-02-04|Autonomous inflow control device and methods for using same|
    US13/021,277|2011-02-04|
    PCT/US2011/023844|WO2011100176A1|2010-02-12|2011-02-07|Autonomous inflow control device and methods for using same|
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