Oil well water control production pipe column assembly and using method thereof

Abstract

The invention discloses an oil well water control production pipe column assembly and a using method thereof, and solves the technical problems that the oil well filling efficiency is low, and liquid extraction and production are difficult to achieve at the last stage of production. The device comprises a central pipe, a plurality of bypass isolation packers and water control production assemblies, each water control production assembly comprises a plurality of double-layer screen sleeves and a plurality of water control production short sections, each water control production short section comprises an outer protective cylinder, a setting short section, an AICD valve and a circulating sliding sleeve, the setting short section, the AICD valve and the circulating sliding sleeve are sequentially connected, and the double-layer screen sleeves are connected with the double-layer screen sleeves. An annular flow channel is formed among the setting nipple, the AICD valve, the circulating sliding sleeve and the outer protective cylinder, the setting nipple is used for blocking the side, away from the circulating sliding sleeve, of the annular flow channel, a plurality of circulating holes are formed in the circulating sliding sleeve in a penetrating mode, and a control part used for controlling the circulating holes to be opened and closed at the same time is arranged in the circulating sliding sleeve. The liquid return flow of filling liquid can be increased, the filling efficiency is improved, and liquid extraction and production can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil well production and exploitation, and particularly relates to an oil well water control production pipe string assembly and a use method thereof. Background Art

[0002] Offshore oil and gas field development refers to the whole process of bringing underground oil and gas resources to the surface through development wells and offshore engineering facilities using advanced technology based on the understanding and mastery of offshore oil and gas field geology and oil and gas reservoir characteristics. Currently, offshore oil and gas resource development is a hot topic and focus of the world's marine economic development.

[0003] The oil well production string in the related technology usually includes a central pipe, to which a double-layer screen sleeve, an AICD valve and a plurality of bypass isolation packers are connected. The plurality of bypass isolation packers are used to fill the open hole in sections to realize the sectioned exploitation of the oil well.

[0004] When the oil well production string in the related technology is filled, the filling material enters the annulus between the double-layer screen sleeve and the wellbore through the bypass isolation packer, and the filling liquid enters the center pipe through the flow path of the AICD valve and returns through the top port of the center pipe.

[0005] Due to the small flow path of AICD valve, when gravel or oleophilic and hydrophobic ceramsite is filled in stages, the return of liquid is slow, thus affecting the filling efficiency. At the same time, in the later stage of oil well production, the water content of the reservoir increases significantly. Limited by the throttling effect of AICD valve, it is difficult to achieve liquid increase and production, thus affecting the later production efficiency of oil wells, which needs to be improved. Summary of the invention

[0006] In order to solve all or part of the above problems, the purpose of the present invention is to provide an oil well water control production tubing assembly and a method of using the same, which can increase the return flow rate of the filling liquid, thereby improving the filling efficiency, and at the same time can also achieve liquid lifting and production, so as to ensure the later production efficiency of the oil well.

[0007] In a first aspect, the present invention provides an oil well water control production string assembly, comprising a central pipe and a plurality of bypass isolation packers, the central pipe is connected to a plurality of water control production assemblies, the plurality of bypass isolation packers and the plurality of water control production assemblies are arranged at intervals, each of the water control production assemblies comprises a plurality of double-layer screen sleeves and a plurality of water control production short sections, the plurality of double-layer screen sleeves and the plurality of water control production short sections are arranged at intervals and are interconnected;

[0008] Each of the water control production nipples comprises an outer casing, a sealing nipple, an AICD valve and a circulation sleeve, the two ends of the outer casing are respectively connected to the outer tube of the corresponding double-layer screen sleeve, the sealing nipple, the AICD valve and the circulation sleeve are sequentially connected and coaxially located inside the outer casing, and the sealing nipple and the circulation sleeve are respectively connected to the inner tube of the corresponding double-layer screen sleeve;

[0009] An annular flow channel is formed between the sealing nipple, the AICD valve, the circulation sleeve and the outer casing. The sealing nipple is used to seal the side of the annular flow channel away from the circulation sleeve. A plurality of circulation holes are penetrated through the circulation sleeve. The circulation holes connect the annular flow channel with the interior of the circulation sleeve, and a control unit for controlling the simultaneous opening and closing of the plurality of circulation holes is provided in the circulation sleeve.

[0010] Optionally, the control unit includes:

[0011] A control sleeve, slidably connected in the circulation sleeve;

[0012] A limiter, disposed between the control sleeve and the circulation sleeve;

[0013] The movement of the control sleeve is controlled by an external operating tool. When the control sleeve blocks the multiple circulation holes respectively, or the control sleeve is located on the side of the multiple circulation holes and exposes the multiple circulation holes respectively, the limiting member is used to limit the control sleeve.

[0014] Optionally, the limiting member includes:

[0015] A mounting groove is provided on the control sleeve;

[0016] A limiting clamp ring, which is C-shaped and has an inner edge that is embedded in the mounting groove;

[0017] An opening groove is provided on the inner side wall of the circulating sleeve;

[0018] A closing groove is provided on the inner side wall of the circulating sleeve;

[0019] When the outer edge position of the limit clamp ring forms a snap fit with the opening groove, the multiple circulation holes are exposed respectively. When the outer edge position of the limit clamp ring forms a snap fit with the closing groove, the control sleeve blocks the multiple circulation holes.

[0020] Optionally, the fixed sleeve on the control sleeve is provided with two sets of sealing rings, and the sealing rings are in tight contact with the inner side wall of the circulating sleeve.

[0021] Optionally, when the limiting snap ring forms a snap fit with the closing groove, the plurality of circulation holes are respectively located between two groups of sealing rings.

[0022] Optionally, the limit snap ring is made of elastic metal, a guide arc surface is provided on the limit snap ring, and guide inclined surfaces are provided on both sides of the inner walls of the opening groove and the closing groove respectively, so that the limit snap ring can be smoothly inserted into the opening groove or the closing groove.

[0023] Optionally, the setting sub comprises:

[0024] A rubber tube base pipe, one end of which is connected to the inner pipe of the corresponding double-layer screen sleeve and the other end of which is connected to the AICD valve;

[0025] The sealing rubber sleeve is sleeved on the rubber sleeve base pipe and is used for sealing between the rubber sleeve base pipe and the outer casing.

[0026] Optionally, the setting rubber tube adopts a self-expanding rubber tube, and is vulcanized and fixed to the middle position of the rubber tube base pipe, and there is a flow gap between the setting rubber tube and the outer casing.

[0027] Optionally, a connecting ring is fixedly provided on the rubber sleeve base tube, a limiting ring is fixedly connected to the inner side wall of the outer casing, the connecting ring is threadedly connected to the limiting ring, and a plurality of flow holes are penetrated through the connecting ring.

[0028] In a second aspect, the present invention provides a method for using an oil well water control production string assembly, comprising the following steps:

[0029] S1, according to the detected oil well reservoir point location, select an appropriate number of double-layer screen sleeves and water control production short sections, connect the central pipe, bypass isolation packer and water control production assembly to form an oil well water control production string assembly;

[0030] S2, lowering the oil well water control production string assembly to the preset position, and setting all bypass isolation packers, using multiple bypass isolation packers to separate the wellbore into multiple filling layers;

[0031] S3, ensure that the circulation sleeve at the lowest position between the filling layers is in the open state, and the other circulation sleeves are in the closed state. During the filling operation, the filling material enters the annulus between the double-layer screen sleeve and the wellbore through the bypass packer, and the filling liquid enters the circulation sleeve through the multiple circulation holes at the lowest end, and quickly returns through the upper port of the central pipe, thereby achieving efficient filling. After the filling operation is completed, the circulation sleeve at the lowest position is closed to carry out water control production;

[0032] S4, at the end of oil well production, the circulating sleeve is controlled to open, and the oil reservoir can enter the circulating sleeve through the circulating hole and return through the upper port of the central pipe to achieve oil well liquid extraction and production.

[0033] It can be seen from the above technical solutions that the oil well water control production string assembly and the use method thereof provided by the present invention have the following advantages:

[0034] The device allows the filling liquid to be returned through multiple circulation holes and the flow path of the AICD valve, effectively increasing the return flow rate of the filling liquid, allowing the filling liquid to be quickly returned, thereby improving the filling efficiency of the oil well. At the same time, the circulation hole can also be used as a production channel for the oil reservoir in the late stage of oil well production, allowing the oil reservoir to enter the tubing through the circulation hole, thereby achieving liquid lifting and production in the oil well. Not only that, the device can achieve refined water control production of the oil well, and the oil reservoirs at different locations can enter the annular flow channel through the corresponding double-layer screen sleeve nearby, reducing the risk of general mixing of oil reservoirs at different locations, and allowing low-water-content oil reservoirs to quickly enter the tubing through the corresponding AICD valve, thereby improving production efficiency.

[0035] Other features and advantages of the present invention will be set forth in the description which follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0037] Figure 1 This is a schematic diagram of the overall structure of an oil well water control production string assembly according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of the water control production assembly in an embodiment of the present invention;

[0039] Figure 3 is a cross-sectional view of a circulating sleeve in an embodiment of the present invention;

[0040] Figure 4 It is a cross-sectional view of a setting sub in an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the use of the oil well water control production string assembly in the filling stage in the embodiment of the invention;

[0042] Figure 6 This is a schematic diagram of the use of the oil well water control production string assembly in the production stage in the embodiment of the invention;

[0043] Figure 7 It is a schematic diagram of the use of the oil well water control production string assembly in the liquid extraction stage in the embodiment of the invention.

[0044] Description of reference numerals:

[0045] 1. Center pipe; 2. Bypass isolation packer; 3. Water control production assembly; 31. Double-layer screen sleeve; 32. Water control production short section; 4. Outer casing; 5. Sealing short section; 51. Rubber sleeve base pipe; 52. Sealing rubber sleeve; 6. AICD valve; 7. Circulation sleeve; 8. Annular flow channel; 9. Circulation hole; 10. Control unit; 101. Control sleeve; 102. Limiting piece; 103. Mounting groove; 104. Limiting clamp; 105. Opening groove; 106. Closing groove; 11. Sealing ring; 12. Guide arc surface; 13. Guide slope; 14. Connecting ring; 15. Limiting ring; 16. Flow hole. DETAILED DESCRIPTION

[0046] To make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other arbitrarily without conflict.

[0047] like Figure 1-Figure 7 An embodiment of the present invention is shown, in which an oil well water control production tubing assembly is disclosed, including a central pipe 1, to which a plurality of bypass isolation packers 2 and a plurality of water control production assemblies 3 are connected, and the plurality of bypass isolation packers 2 and the plurality of water control production assemblies 3 are arranged at intervals, that is, there is a water control production assembly 3 between each two adjacent bypass isolation packers 2.

[0048] In one embodiment, Figure 1 , Figure 2 As shown, each water control production assembly 3 includes a plurality of double-layer screen jackets 31 and a plurality of water control production short sections 32. The plurality of double-layer screen jackets 31 and the plurality of water control production short sections 32 are arranged at intervals and connected to each other. In this embodiment, only two double-layer screen jackets 31 and two water control production short sections 32 are shown.

[0049] In one embodiment, Figure 1 , Figure 2 As shown, each water control production pup joint 32 comprises an outer casing 4, a sealing pup joint 5, an AICD valve 6 and a circulation sleeve 7. Both ends of the outer casing 4 are respectively connected to the outer pipe of the corresponding double-layer screen sleeve 31. The sealing pup joint 5, the AICD valve 6 and the circulation sleeve 7 are threadedly connected in sequence and are coaxially located inside the outer casing 4. At the same time, the sealing pup joint 5 and the circulation sleeve 7 are respectively connected to the inner pipe of the corresponding double-layer screen sleeve 31.

[0050] In one embodiment, Figure 1 , Figure 2As shown, an annular flow channel 8 is formed between the setting nipple 5, the AICD valve 6, the circulation sleeve 7 and the outer casing 4, and the setting nipple 5 is used to block the side of the annular flow channel 8 away from the circulation sleeve 7. A plurality of circulation holes 9 are provided through the circulation sleeve 7, and the circulation holes 9 connect the annular flow channel 8 with the inside of the circulation sleeve 7. At the same time, a control unit 10 for controlling the simultaneous opening and closing of the plurality of circulation holes 9 is provided in the circulation sleeve 7.

[0051] When filling operation is performed, the control unit 10 can be used to control multiple circulation holes 9 to be opened simultaneously, so that the filling liquid can be returned through multiple circulation holes 9 and the flow path of the AICD valve 6, effectively improving the return flow rate of the filling liquid, so that the filling liquid can be quickly returned, thereby improving the filling efficiency of the oil well. At the same time, the circulation hole 9 can also be used as a production channel for the oil reservoir in the late stage of oil well production, so that the oil reservoir can enter the pipe string through the circulation hole 9 to achieve liquid lifting and production of the oil well.

[0052] In one embodiment, Figure 2 , Figure 3 As shown, the control unit 10 includes a control sleeve 101 slidably connected to the circulation sleeve 7, and the control sleeve 101 can respectively block multiple circulation holes 9. At the same time, a limit member 102 is provided between the control sleeve 101 and the circulation sleeve 7, and the limit member 102 is used to limit the control sleeve 101.

[0053] In one embodiment, Figure 2 , Figure 3 As shown, the limiting member 102 includes a mounting groove 103 provided on the control sleeve 101, the mounting groove 103 is annular and arranged along the circumference of the control sleeve 101, a C-shaped limiting snap ring 104 is arranged in the mounting groove 103, the inner edge position of the limiting snap ring 104 is embedded in the mounting groove 103, and the outer edge position is exposed outside the mounting groove 103. The inner side wall of the circulating sleeve 7 is provided with an opening groove 105 and a closing groove 106 along its circumference, and the limiting snap ring 104 can form a snap fit with the opening groove 105 or the closing groove 106.

[0054] like Figure 1 As shown, the control sleeve 101 is manipulated to move rightward by an external operating tool, and when the outer edge position of the limit snap ring 104 forms a snap fit with the closing groove 106, the control sleeve 101 blocks the multiple circulation holes 9 respectively, thereby realizing the closing operation of the circulation sleeve 7. Similarly, the control sleeve 101 is manipulated to move leftward by an external operating tool, and when the outer edge position of the limit snap ring 104 forms a snap fit with the opening groove 105, the control sleeve 101 is located on the left side of the multiple circulation holes 9, so that the multiple circulation holes 9 are respectively exposed, thereby realizing the opening operation of the circulation sleeve 7.

[0055] In one embodiment, Figure 2, Figure 3 As shown, the control sleeve 101 is fixedly provided with two groups of sealing rings 11, each group of sealing rings 11 is provided with two, and the four sealing rings 11 are closely abutted against the inner side wall of the circulation sleeve 7 to achieve a stable seal between the control sleeve 101 and the circulation sleeve 7. At the same time, when the limit clamp ring 104 and the closing groove 106 form a snap fit, the four sealing rings 11 are distributed in pairs on both sides of the plurality of circulation holes 9 to achieve a seal between the circulation holes 9 and the control sleeve 101, thereby ensuring a sealing effect.

[0056] In one embodiment, Figure 2 , Figure 3 As shown, the limit snap ring 104 is made of elastic metal, and a guide arc surface 12 is integrally formed on the limit snap ring 104. The inner walls on both sides of the opening groove 105 and the closing groove 106 are respectively integrally formed with guide inclined surfaces 13 to ensure that the limit snap ring 104 can be smoothly inserted into the opening groove 105 or the closing groove 106, and at the same time ensure that the limit snap ring 104 can be smoothly removed from the opening groove 105 or the closing groove 106, thereby realizing rapid control of the opening and closing of the circulating sleeve 7.

[0057] In one embodiment, Figure 2 , Figure 4 As shown, the sealing nipple 5 includes a rubber tube base pipe 51 and a sealing rubber tube 52. One end of the rubber tube base pipe 51 is connected to the inner pipe of the corresponding double-layer screen sleeve 31, and the other end is connected to the AICD valve 6. The sealing rubber tube 52 adopts a self-expanding rubber tube and is fixed to the middle position of the rubber tube base pipe 51 by vulcanization, and there is a flow gap between the sealing rubber tube 52 and the outer casing 4. After a period of filling operation, the sealing rubber tube 52 can automatically expand when encountering oil, water, oil and water, hydrocarbons, etc., and is sealed between the rubber tube base pipe 51 and the outer casing 4, thereby realizing automatic blocking of the annular flow channel 8. Since the self-expanding rubber tube is a prior art, it will not be described in detail here.

[0058] In one embodiment, Figure 2 , Figure 4 As shown, a connecting ring 14 is integrally formed on the rubber tube base tube 51, and a limiting ring 15 is integrally formed and connected to the inner side wall of the outer casing 4, and the connecting ring 14 is threadedly connected to the limiting ring 15 to improve the connection stability between the rubber tube base tube 51 and the outer casing 4. At the same time, a plurality of flow holes 16 are penetrated and arranged at equal intervals along the circumference of the connecting ring 14 to ensure that the liquid can flow smoothly in the annular flow channel 8.

[0059] like Figure 5 , Figure 6 , Figure 7 As shown, this embodiment also discloses a method for using an oil well water control production string assembly, comprising the following steps:

[0060] S1, according to the detected oil well reservoir point location, select a suitable number of double-layer screen sleeves 31 and water control production short sections 32, connect the central pipe 1, bypass isolation packer 2 and water control production assembly 3 to form an oil well water control production string assembly.

[0061] S2, lowering the oil well water control production string assembly to a preset position, and sealing all bypass isolation packers 2, using multiple bypass isolation packers 2 to separate the wellbore into multiple filling layers.

[0062] S3, when lowering the water control production string of the oil well, ensure that the circulation sleeve 7 at the lowest position between the filling layers is in the open state, and the other circulation sleeves 7 are in the closed state. When the filling operation is carried out, the filling material enters the annulus between the double-layer screen sleeve 31 and the wellbore through the bypass packer, and then the filling liquid enters the string through the flow path of the AICD valve 6 and multiple circulation holes 9, and quickly returns through the upper port of the central pipe 1, thereby achieving efficient filling. After a period of time after the filling operation is completed, the sealing rubber tube 52 automatically expands and is sealed between the rubber tube base pipe 51 and the outer casing 4, thereby achieving automatic blocking of the annulus flow channel 8, and then the circulation sleeve 7 at the lowest position is closed, and then water control production can be carried out.

[0063] S4, at the end of the oil well production, the circulation sleeve 7 is controlled to open, so that the oil reservoir can enter the circulation sleeve 7 through the circulation hole 9 and return through the upper port of the central pipe 1 to achieve oil well liquid extraction and production.

[0064] It can be seen from the above process that when the oil well is being filled, the filling liquid can be returned through multiple circulation holes 9 and the flow path of the AICD valve 6, effectively increasing the return flow rate of the filling liquid, allowing the filling liquid to be quickly returned, thereby improving the filling efficiency of the oil well. At the same time, the circulation hole 9 can also be used as a production channel for the oil reservoir at the end of the oil well production, allowing the oil reservoir to enter the pipe string through the circulation hole 9, thereby achieving liquid lifting and production of the oil well.

[0065] In addition, the device can separate the filling layer into multiple small sections, and the oil reservoirs at different levels can enter the annular flow channel 8 through the corresponding double-layer screen sleeve 31 nearby, and then control water production through the corresponding AICD valve 6, effectively reducing the risk of general mixing of oil reservoirs at different levels, thereby achieving refined water control production. Compared with the general water control production in the prior art, this design allows the oil in the low-water-content oil reservoir to quickly pass through the AICD valve 6, effectively improving production efficiency.

[0066] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present invention should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0067] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An oil well water control production string assembly, comprising a central pipe (1) and a plurality of bypass isolation packers (2), characterized in that: The central pipe (1) is connected to a plurality of water control production assemblies (3); the plurality of bypass isolation packers (2) and the plurality of water control production assemblies (3) are arranged at intervals; each of the water control production assemblies (3) comprises a plurality of double-layer screen jackets (31) and a plurality of water control production short sections (32); the plurality of double-layer screen jackets (31) and the plurality of water control production short sections (32) are arranged at intervals and are connected to each other; Each of the water control production nipples (32) comprises an outer casing (4), a sealing nipple (5), an AICD valve (6) and a circulation sleeve (7), the two ends of the outer casing (4) are respectively connected to the outer pipe of the corresponding double-layer screen jacket (31), the sealing nipples (5), the AICD valve (6) and the circulation sleeve (7) are sequentially connected and coaxially located inside the outer casing (4), and the sealing nipples (5) and the circulation sleeve (7) are respectively connected to the inner pipe of the corresponding double-layer screen jacket (31); An annular flow channel (8) is formed between the sealing nipple (5), the AICD valve (6), the circulation sleeve (7) and the outer casing (4). The sealing nipple (5) is used to seal the annular flow channel (8) away from the side of the circulation sleeve (7). The circulation sleeve (7) is penetrated by a plurality of circulation holes (9). The circulation holes (9) connect the annular flow channel (8) with the interior of the circulation sleeve (7). A control unit (10) for controlling the simultaneous opening and closing of the plurality of circulation holes (9) is provided in the circulation sleeve (7).

2. The oil well water control production string assembly according to claim 1, characterized in that: The control unit (10) comprises: A control sleeve (101) is slidably connected in the circulation sleeve (7); A limiting member (102) is arranged between the control sleeve (101) and the circulation sleeve (7); The control sleeve (101) is controlled to move by an external operating tool. When the control sleeve (101) blocks the plurality of circulation holes (9) respectively, or the control sleeve (101) is located on the side of the plurality of circulation holes (9) and exposes the plurality of circulation holes (9) respectively, the limiting member (102) is used to limit the control sleeve (101).

3. The oil well water control production string assembly according to claim 2, characterized in that: The limiting member (102) comprises: A mounting groove (103) is arranged on the control sleeve (101); A limiting clamp ring (104) is C-shaped, and its inner edge is embedded in the installation groove (103); An opening groove (105) is provided on the inner side wall of the circulating sleeve (7); A closing groove (106) is provided on the inner side wall of the circulating sleeve (7); When the outer edge of the limiting snap ring (104) forms a snap fit with the opening groove (105), the plurality of circulation holes (9) are exposed respectively; when the outer edge of the limiting snap ring (104) forms a snap fit with the closing groove (106), the control sleeve (101) blocks the plurality of circulation holes (9).

4. The oil well water control production string assembly according to claim 3, characterized in that: The fixed sleeve on the control sleeve (101) is provided with two groups of sealing rings (11), and the sealing rings (11) are in tight contact with the inner side wall of the circulation sleeve (7).

5. The oil well water control production string assembly according to claim 4, characterized in that: When the limiting snap ring (104) and the closing groove (106) form a snap fit, the plurality of circulation holes (9) are respectively located between the two groups of sealing rings (11).

6. The oil well water control production string assembly according to claim 3, characterized in that: The limiting snap ring (104) is made of elastic metal, and is provided with a guide arc surface (12). The inner walls on both sides of the opening groove (105) and the closing groove (106) are respectively provided with guide inclined surfaces (13), so that the limiting snap ring (104) can be smoothly inserted into the opening groove (105) or the closing groove (106).

7. The oil well water control production string assembly according to claim 1, characterized in that: The setting sub (5) comprises: A rubber base tube (51), one end of which is connected to the inner tube of the corresponding double-layer screen jacket (31) and the other end of which is connected to the AICD valve (6); The sealing rubber sleeve (52) is sleeved on the rubber sleeve base tube (51) and is used for sealing between the rubber sleeve base tube (51) and the outer casing (4).

8. The oil well water control production string assembly according to claim 7, characterized in that: The setting rubber cylinder (52) is a self-expanding rubber cylinder and is fixed to the middle position of the rubber cylinder base pipe (51) by vulcanization, and a flow gap exists between the setting rubber cylinder (52) and the outer casing (4).

9. The oil well water control production string assembly according to claim 7, characterized in that: A connecting ring (14) is fixedly sleeved on the rubber sleeve base tube (51), a limiting ring (15) is fixedly connected to the inner wall of the outer protective tube (4), the connecting ring (14) is threadedly connected to the limiting ring (15), and a plurality of flow holes (16) are penetrated through the connecting ring (14).

10. A method for using the oil well water control production string assembly according to any one of claims 1 to 9, characterized in that: The steps include: S1, according to the detected oil well reservoir point location, select a suitable number of double-layer screen sleeves (31) and water control production short joints (32), connect the central pipe (1), the bypass isolation packer (2) and the water control production assembly (3) to form an oil well water control production string assembly; S2, lowering the oil well water control production string assembly to a preset position, and setting all bypass isolation packers (2), using multiple bypass isolation packers (2) to separate the wellbore into multiple filling layers; S3, ensuring that the circulation sleeve (7) at the lowest position between the filling layers is in an open state and the other circulation sleeves (7) are in a closed state. During the filling operation, the filling material enters the annulus between the double-layer screen sleeve (31) and the wellbore through the bypass packer, and the filling liquid enters the circulation sleeve (7) through the multiple circulation holes (9) at the lowest end and quickly returns through the upper port of the central pipe (1), thereby achieving efficient filling. After the filling operation is completed, the circulation sleeve (7) at the lowest position is closed, and water control production can be carried out; S4, at the end of the oil well production, the circulation sleeve (7) is controlled to open, and the oil reservoir can enter the circulation sleeve (7) through the circulation hole (9) and return through the upper port of the central pipe (1) to achieve oil well liquid extraction and production.

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