Sliding sleeve type controllable AICD water control screen pipe device

Abstract

The invention discloses a sliding sleeve type controllable AICD water control screen pipe device. The sliding sleeve type controllable AICD water control screen pipe device comprises a central pipe extending in the axial direction; the screen pipe is fixedly arranged outside the central pipe in a sleeving manner; a first annular space is formed between the screen pipe and the central pipe; the pipe body is fixedly connected with the central pipe, extends in the axial direction and comprises a pipe wall and a hollow part; an AICD valve is fixedly arranged on the pipe wall; the hollow part is provided with a sliding sleeve capable of sliding in the axial direction, and the sliding sleeve is provided with an opening position and a closing position. The pipe body is fixedly sleeved with the protective sleeve, and a second annular space is formed between the protective sleeve and the pipe body; the first annular space is communicated with the second annular space; an inlet of the AICD valve faces the second annular space and is communicated with the second annular space; when the sliding sleeve is located at the opening position, the outlet is communicated with the hollow part; when the sliding sleeve is located at the closing position, the outlet is isolated from the hollow part. The water control screen pipe device not only has self-adaptive water control capacity, but also has independent and controllable opening and closing functions, and can realize fine regulation and control on each underground layer section.

Description

Technical Field

[0001] This manual relates to the field of oil and gas well completion and downhole flow control technology, and in particular to a sliding sleeve type controllable AICD water control screen device. Background Technology

[0002] Existing AICDs (Adaptive Inflow Control Devices) can automatically adjust flow rates based on fluid viscosity and water cut, achieving water control and oil production enhancement to some extent. However, AICDs are passive devices with fixed structural parameters, making it impossible to actively open or close individual well sections. In multi-layer horizontal wells or long horizontal sections, the permeability and water cut vary significantly between different sections. If severe water breakthrough or gas channeling occurs in a particular section, it will affect the production performance of the entire well section. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, one of the objectives of this specification is to provide a sliding sleeve type controllable AICD water control screen device, which has both adaptive water control capability and independent controllable opening and closing function, and can realize fine control of each layer in the well.

[0004] To achieve the above objectives, this specification provides a sliding-sleeve type controllable AICD water control screen tube device, comprising: A central tube extending axially; A screen tube is fixedly sleeved outside the central tube; a first annular space is formed between the screen tube and the central tube; A tube body is fixedly connected to one end of the central tube. The tube body extends along the axial direction and includes a tube wall and a hollow portion. An AICD valve is fixedly provided on the tube wall. The hollow portion is provided with a sliding sleeve that can slide along the axial direction. The sliding sleeve has an open position and a closed position. A protective sleeve is fixedly fitted onto the outside of the tube body, forming a second annular space between the protective sleeve and the tube body; the first annular space and the second annular space are connected; the AICD valve has an inlet and an outlet, the inlet is oriented towards and connected to the second annular space; the outlet is oriented towards the hollow portion; when the sliding sleeve is in the open position, the outlet is connected to the hollow portion; when the sliding sleeve is in the closed position, the outlet is isolated from the hollow portion.

[0005] In a preferred embodiment, a first sealing part and a second sealing part are provided between the sliding sleeve and the pipe wall, and the first sealing part and the second sealing part are spaced apart in the axial direction; when the sliding sleeve is in the open position, the AICD valve, the first sealing part and the second sealing part are arranged sequentially in the axial direction; when the sliding sleeve is in the closed position, the AICD valve is located between the first sealing part and the second sealing part.

[0006] In a preferred embodiment, the first sealing portion includes two first sealing rings spaced apart in the axial direction, and the second sealing portion includes two second sealing rings spaced apart in the axial direction; the diameter of the first sealing ring closer to the second sealing portion is larger than the diameter of the first sealing ring farther from the second sealing portion; the diameter of the second sealing ring closer to the first sealing portion is larger than the diameter of the second sealing ring farther from the first sealing portion.

[0007] In a preferred embodiment, a retaining ring with radial elasticity is provided between the sliding sleeve and the pipe wall; the inner wall surface of the pipe wall is provided with a first groove and a second groove; when the sliding sleeve is in the open position, the retaining ring is located in the first groove; when the sliding sleeve is in the closed position, the retaining ring is located in the second groove; in the axial direction, the retaining ring is located on the side of the second sealing part away from the first sealing part, and the AICD valve, the second groove and the first groove are arranged sequentially.

[0008] In a preferred embodiment, the sliding sleeve is provided with a control interface, and the control interface is provided with an engagement structure, which is one or more of the following: thread engagement structure, positioning block engagement structure, and slot engagement structure.

[0009] In a preferred embodiment, a connector is fixedly connected to the end of the tube body away from the central tube; a first end ring is fixedly sleeved at the connection between the connector and the tube body, and the end of the protective sleeve away from the central tube is fixedly connected to the first end ring by a fastening pin.

[0010] In a preferred embodiment, an adapter ring is fixedly sleeved on the outside of the central tube, and the adapter ring has a flow channel connecting the first annular space and the second annular space; the end of the protective sleeve near the central tube is fixedly connected to the adapter ring; the end of the screen tube near the tube body is fixedly connected to the adapter ring.

[0011] In a preferred embodiment, a third sealing ring is provided between the protective sleeve and the first end ring, and a fourth sealing ring is provided between the protective sleeve and the adapter ring.

[0012] In a preferred embodiment, the end of the screen tube away from the tube body is fixedly connected to the central tube via a second end ring, and the second end ring is fixedly sleeved on the outside of the central tube.

[0013] In a preferred embodiment, the pipe body includes a first interface and a second interface disposed opposite to each other in the axial direction. The first interface is fixedly connected to a connector, and the second interface is fixedly connected to the central pipe. In the axial direction, the first interface, the AICD valve, the second groove, the first groove, and the second interface are arranged sequentially. There are two AICD valves, which are aligned in the axial direction and disposed opposite to each other in the circumferential direction. Beneficial effects

[0014] The sliding-sleeve type controllable AICD water control screen device provided in this embodiment includes a central tube, a screen tube, a tube body, and a protective sleeve. The tube body is equipped with both an AICD valve and a sliding sleeve. The AICD valve has adaptive water control capability, and the sliding sleeve can cooperate with a switching tool to achieve axial movement, providing active control capability. Therefore, this sliding-sleeve type controllable AICD water control screen device possesses both adaptive water control capability, automatically adjusting the flow rate according to changes in fluid properties to maintain automatic flow restriction capability for fluids with different viscosities and water contents; and independent controllable opening and closing functions, thereby effectively isolating high-water-cut zones or abnormal flow-producing zones, improving the overall wellbore production efficiency and final recovery rate, and achieving refined management and control of various downhole zones.

[0015] Furthermore, the water control screen device of this invention does not include a hydraulic system, has a simple and reliable structure, and is suitable for long-term downhole service. It concentrates the drive and control functions (i.e., the function of driving and controlling the axial movement of the sliding sleeve) in an external, retrievable control device, which helps reduce downhole failure risks and simplifies maintenance. This invention has a high degree of modularity, is compatible with existing completion tubing and water control screen systems, facilitates field application, and has good engineering feasibility and economic value.

[0016] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope as a result.

[0017] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0018] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, whole, step, or component, but does not exclude the presence or addition of one or more other features, wholes, steps, or components. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of a sliding sleeve type controllable AICD water control screen tube device provided in this embodiment; Figure 2 for Figure 1 A cross-sectional structural diagram, showing the sliding sleeve in the open position; Figure 3 for Figure 1 A three-dimensional structural diagram of the central tube body; Figure 4 for Figure 3 A cross-sectional structural diagram, showing the sliding sleeve in the open position; Figure 5 for Figure 3 A cross-sectional structural diagram, showing the sliding sleeve in the closed position.

[0021] Explanation of reference numerals in the attached figures: 1. Pipe body; 11. Pipe wall; 111. First groove; 112. Second groove; 12. Hollow part; 13. First interface; 14. Second interface; 2. AICD valve; 21. Inlet; 22. Outlet; 3. Sliding sleeve; 31. Engaging structure; 4. First sealing part; 41. First sealing ring; 5. Second sealing part; 51. Second sealing ring; 6. Retaining ring; 7. Central tube; 8. Screen tube; 81. First annular space; 9. Protective sleeve; 91. Second annular space; 10. Connector; 15. First end ring; 16. Fastening pin; 17. Adapter ring; 171. Flow channel; 18. Third sealing ring; 19. Fourth sealing ring; 20. Second end ring; 23. Coupling; X, Axial direction. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0023] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or may be interposed with another element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or may be interposed with another element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Please see Figures 1 to 5 This application provides a sliding sleeve type 3 controllable AICD water control screen tube device, including: a central tube 7, a screen tube 8, a tube body 1, and a protective sleeve 9.

[0026] Among them, such as Figure 1 and Figure 2 As shown, the central tube 7 extends along the axial direction X. The screen tube 8 is fixedly sleeved around the central tube 7. A first annular space 81 is formed between the screen tube 8 and the central tube 7. Figures 3 to 5As shown, the tube body 1 is fixedly connected to one end of the central tube 7. The tube body 1 extends along the axial direction X and includes a tube wall 11 and a hollow portion 12. An AICD valve 2 is fixedly mounted on the tube wall 11. The hollow portion 12 is provided with a sliding sleeve 3 that can slide along the axial direction X. The sliding sleeve 3 has an open position and a closed position. A protective sleeve 9 is fixedly fitted over the tube body 1. A second annular space 91 is formed between the protective sleeve 9 and the tube body 1. The first annular space 81 and the second annular space 91 are connected. The AICD valve 2 has an inlet 21 and an outlet 22. The inlet 21 is positioned facing and communicating with the second annular space 91, and the outlet 22 is positioned facing the hollow portion 12. When the sliding sleeve 3 is in the open position, the outlet 22 is connected to the hollow part 12, allowing formation fluid to enter the central pipe 7 through the screen pipe 8 and AICD valve 2 (specifically, it enters the screen pipe 8 to filter sediment, then passes through the first annular space 81 and the second annular space 91 to enter the AICD valve 2 to achieve water control, and then enters the central pipe 7 through the outlet 22 of the AICD valve 2). When the sliding sleeve 3 is in the closed position, the outlet 22 is isolated from the hollow part 12, blocking the fluid communication between the corresponding AICD valve 2 and the central pipe 7.

[0027] The sliding sleeve 3 type controllable AICD water control screen device provided in this embodiment includes a central pipe 7, a screen pipe 8, a pipe body 1, and a protective sleeve 9. The pipe body 1 is equipped with both an AICD valve 2 and a sliding sleeve 3. The AICD valve 2 has adaptive water control capability, and the sliding sleeve 3 can cooperate with a switching tool to move along the axial direction X, possessing active control capability. Therefore, this sliding sleeve 3 type controllable AICD water control screen device not only has adaptive water control capability, automatically adjusting the flow rate according to changes in fluid properties to maintain automatic flow restriction capability for fluids with different viscosities and water contents; it also has independently controllable opening and closing functions, thereby effectively isolating high water-cut sections or abnormal flow-producing sections, improving the overall wellbore production efficiency and final recovery rate, and achieving refined management and control of each section downhole.

[0028] Furthermore, the water control screen device of this invention does not include a hydraulic system, has a simple and reliable structure, and is suitable for long-term downhole service. It concentrates the drive and control functions (i.e., the function of driving and controlling the movement of the sliding sleeve 3 along the X-axis) in an externally retrievable control device, which helps reduce downhole failure risks and simplifies maintenance. This invention has a high degree of modularity, is compatible with existing completion tubing and water control screen systems, facilitates field application, and has good engineering feasibility and economic value.

[0029] In this embodiment, a first sealing part 4 and a second sealing part 5 are provided between the sliding sleeve 3 and the pipe wall 11, and the first sealing part 4 and the second sealing part 5 are spaced apart in the axial direction X. When the sliding sleeve 3 is in the open position, the AICD valve 2, the first sealing part 4 and the second sealing part 5 are arranged sequentially in the axial direction X. When the sliding sleeve 3 is in the closed position, the AICD valve 2 is located between the first sealing part 4 and the second sealing part 5. By providing the first sealing part 4 and the second sealing part 5 between the sliding sleeve 3 and the pipe wall 11, when the sliding sleeve 3 is in the closed position, the AICD valve 2 is located between the first sealing part 4 and the second sealing part 5, thereby isolating the outlet 22 of the AICD valve 2 from the hollow part 12 of the pipe body 1. The sealing part completely seals the AICD valve 2, thereby blocking the external fluid of the screen pipe 8 from entering the central pipe 7, and realizing the closure of the device.

[0030] like Figure 4 and Figure 5 As shown, the first sealing part 4 includes two first sealing rings 41 spaced apart in the axial direction X, and the second sealing part 5 includes two second sealing rings 51 spaced apart in the axial direction X. The two sealing rings in each sealing part further ensure the sealing effect, thereby ensuring the device's closing effect. Both the first sealing part 4 and the second sealing part 5 are fixedly connected to the sliding sleeve 3 and can move together with the sliding sleeve 3.

[0031] Specifically, the diameter of the first sealing ring 41 near the second sealing part 5 is larger than the diameter of the first sealing ring 41 away from the second sealing part 5; the diameter of the second sealing ring 51 near the first sealing part 4 is larger than the diameter of the second sealing ring 51 away from the first sealing part 4. That is, when the sliding sleeve 3 is in the closed position, the diameter of the sealing ring near the AICD valve 2 is larger than the diameter of the sealing ring away from the AICD valve 2, so as to further improve the sealing effect.

[0032] In this embodiment, a retaining ring 6 with radial elasticity is provided between the sliding sleeve 3 and the pipe wall 11. The inner wall surface of the pipe wall 11 is provided with a first groove 111 and a second groove 112. When the sliding sleeve 3 is in the open position, the retaining ring 6 is located in the first groove 111; when the sliding sleeve 3 is in the closed position, the retaining ring 6 is located in the second groove 112. By cooperating with the first groove 111 or the second groove 112, the sliding sleeve 3 can be fixed in the open or closed position.

[0033] Specifically, in the axial direction X, the retaining ring 6 is located on the side of the second sealing part 5 away from the first sealing part 4, so that the positions of the retaining ring 6, the first sealing part 4, and the second sealing part 5 are reasonably distributed. Preferably, the distance between the retaining ring 6 and the second sealing part 5 is equal to the distance between the first sealing part 4 and the second sealing part 5.

[0034] Furthermore, in the axial direction X, the AICD valve 2, the second groove 112, and the first groove 111 are arranged sequentially. Preferably, the distance between the AICD valve 2 and the second groove 112 is equal to the distance between the second groove 112 and the first groove 111.

[0035] In this embodiment, the distance between the second groove 112 and the first groove 111 is greater than the distance between the retaining ring 6 and the second sealing part 5, and the distance between the second groove 112 and the first groove 111 is less than the distance between the retaining ring 6 and the first sealing part 4, so that when the sliding sleeve 3 is in the open position, the second groove 112 is located between the first sealing part 4 and the second sealing part 5.

[0036] In this embodiment, the AICD valve 2 can be directly selected from the existing AICD valve 2, and this application does not limit it.

[0037] It should be noted that the sliding sleeve 3 in this embodiment needs to be used in conjunction with a switching tool to achieve axial X-movement of the sliding sleeve 3. The sliding sleeve 3 can be a standard sliding sleeve 3 for use with a standard switching tool; the sliding sleeve 3 can also be a customized sliding sleeve 3 to adapt to different well conditions or different operational needs.

[0038] To achieve reliable driving and precise positioning of the sliding sleeve 3, a control interface is provided inside the sliding sleeve 3. The control interface has an engagement structure 31 for cooperation with a switching tool. The engagement structure 31 is one or more of the following: threaded engagement structure 31, positioning block engagement structure 31, and slot engagement structure 31. Figure 2 , Figure 4 and Figure 5 The meshing structure 31 in the middle is a threaded meshing structure 31, which is used to form a mechanical engagement with an external switching tool, thereby driving the sliding sleeve 3 to slide along the axial direction X.

[0039] The control interface can adopt a standard or customized structure and can use various engagement methods such as threads, positioning blocks, and slots, so that the device can adapt to different well conditions, different operating requirements, and different switching tools, and has good versatility and adaptability. The external switching tool can be a hydraulically driven switching tool, an electrically driven tool, or a mechanically driven tool, which forms a mechanical engagement with the sliding sleeve 3 through the control interface, thereby driving the sliding sleeve 3 to slide along the axial direction X.

[0040] Specifically, the control interface may also include a conical guide structure (not shown in the figure). The conical guide structure is located upstream of the engagement structure 31 and can act as a slope to guide the opening tool into the sliding sleeve 3. The conical guide structure is used to assist the external switching tool in automatically aligning with the sliding sleeve 3. The engagement structure 31 is used to achieve stable and reliable power transmission and position locking between the external switching tool and the target sliding sleeve 3, so as to ensure that the target sliding sleeve 3 can still be quickly and accurately positioned and reliably operated under complex downhole conditions, thereby improving the success rate of operation and reducing the risk of downhole misoperation.

[0041] like Figure 2 As shown, a connector 10 is fixedly connected to the end of the pipe body 1 away from the central pipe 7. The end of the connector 10 away from the pipe body 1 can be connected to other oil pipes through a coupling 23. A first end ring 15 is fixedly sleeved on the outside of the connection between the connector 10 and the pipe body 1, and the end of the protective sleeve 9 away from the central pipe 7 is fixedly connected to the first end ring 15 by a fastening pin 16.

[0042] Specifically, an adapter ring 17 is fixedly sleeved on the outside of the central tube 7. The adapter ring 17 has a flow channel 171 connecting the first annular space 81 and the second annular space 91 to facilitate fluid flow. The end of the protective sleeve 9 closest to the central tube 7 is fixedly connected to the adapter ring 17. The installation and fixation of the protective sleeve 9 are achieved by setting the first end ring 15 and the adapter ring 17.

[0043] Furthermore, a third sealing ring 18 is provided between the protective sleeve 9 and the first end ring 15, and a fourth sealing ring 19 is provided between the protective sleeve 9 and the adapter ring 17, so as to ensure good sealing between the protective sleeve 9 and the tube body 1.

[0044] like Figure 2 As shown, the end of the screen tube 8 closest to the tube body 1 is fixedly connected to the adapter ring 17. The end of the screen tube 8 furthest from the tube body 1 is fixedly connected to the central tube 7 via a second end ring 20, which is fixedly sleeved on the outside of the central tube 7. The screen tube 8 is installed and fixed by setting the second end ring 20 and the adapter ring 17.

[0045] like Figure 3 and Figure 4 As shown, the pipe body 1 includes a first interface 13 and a second interface 14 disposed opposite to each other in the axial direction X. The first interface 13 is used to be fixedly connected to the connector 10, and the second interface 14 is used to be fixedly connected to the central pipe 7. The first interface 13 and the second interface 14 can realize the installation and fixation of the pipe body 1.

[0046] Specifically, both the first interface 13 and the second interface 14 are provided with threads, thereby enabling a quick and stable connection between the pipe body 1, the connector 10, and the central pipe 7.

[0047] In this embodiment, there are two AICD valves 2, which are aligned in the axial direction X and arranged opposite each other in the circumferential direction. In the axial direction X, the first interface 13, the AICD valve 2, the second groove 112, the first groove 111, and the second interface 14 are arranged sequentially to achieve a reasonable layout.

[0048] The sliding sleeve type 3 controllable AICD water control screen tube device provided in this application can be used in series. The end of its connector 10 away from the tube body 1 or the end of the central tube 7 away from the tube body 1 can be connected to an oil pipe or coupling 23 of the same size and thread. According to the location of the production layer, the length is matched by reasonably setting the number of central tubes 7 and screen tubes 8, and then the layers are separated by a packer to avoid interference between the production layers.

[0049] Existing sliding sleeve tools are mainly used for fracturing or testing conditions and have not yet been integrated with AICD for long-term production water control. This application, however, by setting an axial X-sliding mechanical sliding sleeve 3 inside the pipe body 1, can completely cut off the pipe body 1 when needed, effectively isolating high water-cut sections or abnormal flow-producing sections, avoiding their adverse effects on the overall wellbore production, and improving the overall wellbore fluid production quality and recovery efficiency.

[0050] This application integrates the passive adaptive water control function of AICD valve 2 with the active controllable switching function of sliding sleeve 3 into one unit. This allows the device to automatically adjust the flow rate according to changes in fluid properties, maintaining automatic flow restriction capability for fluids with different viscosities and water contents. It can also independently open or close individual water control screen devices when needed, thereby effectively isolating high water-cut sections or abnormal flow-producing sections, improving the overall production efficiency and final recovery rate of the wellbore, realizing refined management of each section downhole, achieving independent control and water control management of fluids in each section downhole, and improving the accuracy of stratified management and water control effect.

[0051] It should be noted that in the description of this specification, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this specification, unless otherwise stated, "a plurality of" means two or more.

[0052] Any numerical values ​​cited herein include all values ​​ranging from a lower limit to an upper limit, increasing by one unit, with at least two units between any lower and any higher value. For example, if the quantity of a component or the value of a process variable (e.g., temperature, pressure, time, etc.) is described as being from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in this specification. For values ​​less than 1, a unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1, etc. These are merely examples intended for explicit expression, and it can be assumed that all possible combinations of values ​​listed between the minimum and maximum values ​​are explicitly described in this specification in a similar manner.

[0053] Unless otherwise stated, all ranges include the endpoints and all numbers between them. The terms "approximately" or "about" used with ranges apply to both endpoints of the range. Thus, "approximately 20 to 30" is intended to cover "approximately 20 to approximately 30," including at least the specified endpoints.

[0054] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified elements, components, parts, or steps, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional.

[0055] Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of "a" or "an" to describe an element, component, part, or step does not imply the exclusion of other elements, components, parts, or steps.

[0056] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this teaching should not be determined by reference to the above description, but rather by reference to the appended claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the inventors have not considered that subject matter as part of the disclosed inventive subject matter.

Claims

1. A sliding sleeve type controllable AICD water control screen tube device, characterized in that, include: A central tube extending axially; A screen tube is fixedly sleeved outside the central tube; a first annular space is formed between the screen tube and the central tube; A tube body is fixedly connected to one end of the central tube. The tube body extends along the axial direction and includes a tube wall and a hollow portion. An AICD valve is fixedly provided on the tube wall. The hollow portion is provided with a sliding sleeve that can slide along the axial direction. The sliding sleeve has an open position and a closed position. A protective sleeve is fixedly fitted onto the outside of the tube body, forming a second annular space between the protective sleeve and the tube body; the first annular space and the second annular space are connected; the AICD valve has an inlet and an outlet, the inlet is oriented towards and connected to the second annular space; the outlet is oriented towards the hollow portion; when the sliding sleeve is in the open position, the outlet is connected to the hollow portion; when the sliding sleeve is in the closed position, the outlet is isolated from the hollow portion.

2. The sliding sleeve type controllable AICD water control screen tube device according to claim 1, characterized in that, A first sealing part and a second sealing part are provided between the sliding sleeve and the pipe wall, and the first sealing part and the second sealing part are spaced apart in the axial direction; when the sliding sleeve is in the open position, the AICD valve, the first sealing part and the second sealing part are arranged sequentially in the axial direction; when the sliding sleeve is in the closed position, the AICD valve is located between the first sealing part and the second sealing part.

3. The sliding sleeve type controllable AICD water control screen tube device according to claim 2, characterized in that, The first sealing portion includes two first sealing rings spaced apart in the axial direction, and the second sealing portion includes two second sealing rings spaced apart in the axial direction; the diameter of the first sealing ring closer to the second sealing portion is larger than the diameter of the first sealing ring farther away from the second sealing portion; the diameter of the second sealing ring closer to the first sealing portion is larger than the diameter of the second sealing ring farther away from the first sealing portion.

4. The sliding sleeve type controllable AICD water control screen tube device according to claim 2, characterized in that, A retaining ring with radial elasticity is provided between the sliding sleeve and the pipe wall; the inner wall surface of the pipe wall is provided with a first groove and a second groove; when the sliding sleeve is in the open position, the retaining ring is located in the first groove; when the sliding sleeve is in the closed position, the retaining ring is located in the second groove; in the axial direction, the retaining ring is located on the side of the second sealing part away from the first sealing part, and the AICD valve, the second groove and the first groove are arranged in sequence.

5. The sliding sleeve type controllable AICD water control screen tube device according to claim 1, characterized in that, The sliding sleeve is provided with a control interface, and the control interface is provided with a meshing structure, which is one or more of the following: threaded meshing structure, positioning block meshing structure, and slot meshing structure.

6. The sliding sleeve type controllable AICD water control screen tube device according to claim 1, characterized in that, A connector is fixedly connected to one end of the tube body away from the central tube; a first end ring is fixedly sleeved at the connection between the connector and the tube body, and the end of the protective sleeve away from the central tube is fixedly connected to the first end ring by a fastening pin.

7. The sliding sleeve type controllable AICD water control screen tube device according to claim 6, characterized in that, An adapter ring is fixedly sleeved on the outside of the central tube, and the adapter ring has a flow channel connecting the first annular space and the second annular space; the end of the protective sleeve near the central tube is fixedly connected to the adapter ring; the end of the screen tube near the tube body is fixedly connected to the adapter ring.

8. The sliding sleeve type controllable AICD water control screen tube device according to claim 7, characterized in that, A third sealing ring is provided between the protective sleeve and the first end ring, and a fourth sealing ring is provided between the protective sleeve and the adapter ring.

9. The sliding sleeve type controllable AICD water control screen tube device according to claim 1, characterized in that, The end of the screen tube away from the tube body is fixedly connected to the central tube via a second end ring, which is fixedly sleeved on the outside of the central tube.

10. The sliding sleeve type controllable AICD water control screen tube device according to claim 1, characterized in that, The tube body includes a first interface and a second interface that are arranged opposite each other in the axial direction. The first interface is fixedly connected to the connector, and the second interface is fixedly connected to the central tube. In the axial direction, the first interface, the AICD valve, the second groove, the first groove, and the second interface are arranged sequentially. There are two AICD valves, which are aligned in the axial direction and opposite each other in the circumferential direction.

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