A top-drive plug valve for ultra-high pressure deep wells

Abstract

This invention provides a top-drive plug valve for ultra-high pressure deep wells, relating to the field of top-drive plug valve technology. It includes: a connecting and mounting unit, a movable reinforcing unit, an auxiliary multi-purpose unit, a rotation control unit, and an auxiliary positioning unit. The movable reinforcing unit is installed outside the connecting and mounting unit; the rotation control unit is installed inside the connecting and mounting unit; the auxiliary multi-purpose unit is installed on the connecting and mounting unit and the movable reinforcing unit, protecting the external threads of the connecting and mounting unit, improving the reinforcing effect of the movable reinforcing unit, and blocking the rotation control unit; the auxiliary positioning unit is installed at the bottom of the rotation control unit. The movable reinforcing ring of this invention strengthens the valve body, increasing its strength; it solves the problem of low valve body strength near the valve core due to the lack of a reinforcing structure.

Description

Technical Field

[0001] This invention belongs to the technical field of top-drive plug valves, and more specifically, relates to a top-drive plug valve for ultra-high pressure deep wells. Background Technology

[0002] The top-drive plug valve for ultra-high pressure deep wells is a core component designed specifically for deep well drilling. Integrated into the top drive unit, it controls drilling fluid circulation. Its structure is similar to a square drill pipe plug valve, achieving rapid opening and closing through valve core rotation. It possesses high-pressure sealing performance and can withstand extreme downhole pressures. This valve can prevent blowouts and improve operational safety under complex geological conditions. Working in conjunction with the top drive system, the top-drive plug valve optimizes drilling efficiency and reduces the risk of stuck pipe, making it a key piece of equipment for drilling deep, ultra-deep, and complex formations.

[0003] For example, patent application number CN202322426160.X discloses a low-torque, high-life top-drive plug valve for ultra-deep wells. The valve body, lower valve seat, spring, valve core, upper valve seat, upper valve seat cover, fixing ring, upper assembly, lower assembly, and connecting components are included. A tungsten-titanium dual-phase gradient alloy structure is composited on the sealing surfaces of the valve core and the upper and lower valve seats, creating a gradient that enhances the wear resistance of the ball seat and extends its service life. This structure maintains the high strength, high hardness, high wear resistance, high temperature resistance, high oxidation resistance, and chemical stability of the hard phase, while also possessing the good toughness and plasticity of the metallic phase. A low-torque material layer is further composited on the tungsten-titanium dual-phase gradient alloy surface, significantly reducing the friction coefficient of the relative sliding surfaces and enabling controllable switching under working pressure. The upper valve seat is equipped with an upper valve seat cover and spring preload, which, together with the spring preload of the lower valve seat, ensures a more reliable seal between the valve core and valve seat at high and low pressures, meeting user needs.

[0004] Based on the above, the currently used top-drive plug valves still have the following problems: 1. They generally lack a reinforcing structure, resulting in lower valve body strength near the valve core; 2. It is inconvenient to accurately control the tightening force of the valve core, which can easily lead to severe stress when tightening the valve core, affecting its normal service life; 3. The external threads on the valve body are always exposed, making them prone to bumps or damage, affecting subsequent normal connections; 4. They cannot provide elastic positioning for the valve core, making valve core disassembly and installation more troublesome. Summary of the Invention

[0005] This disclosure relates to a top-drive plug valve for ultra-high pressure deep wells, comprising a connection and installation unit, a movable reinforcing unit, an auxiliary multi-purpose unit, a rotation control unit, and an auxiliary positioning unit. The movable reinforcing ring strengthens the valve body, increasing its strength. When the valve core rotates to a specified angle, it stops rotating, while the rotation control unit can continue to rotate a certain angle. This ensures accurate opening and closing while preventing excessive stress on the valve core, thus guaranteeing its normal service life. Two auxiliary multi-purpose plates are located on the left side of the valve body, protecting the external threads and preventing them from being bumped or damaged. When the valve core is disassembled or installed, the two auxiliary positioning heads automatically slide inward under force, automatically releasing the elastic positioning. This solves the problems of low valve body strength near the valve core, excessive stress during valve core tightening, easy bumping or damage to the external threads, and cumbersome valve core disassembly and installation.

[0006] This invention provides a top-drive plug valve for ultra-high pressure deep wells, comprising: a connecting and mounting unit, a movable reinforcing unit, an auxiliary multi-purpose unit, a rotation control unit, and an auxiliary positioning unit; the movable reinforcing unit is installed outside the connecting and mounting unit and is used to increase the strength of the connecting and mounting unit; the rotation control unit is installed inside the connecting and mounting unit and is used to control the opening and closing of the connecting and mounting unit; the auxiliary multi-purpose unit is installed on the connecting and mounting unit and the movable reinforcing unit, and is used to protect the external threads of the connecting and mounting unit, and also to improve the reinforcing effect of the movable reinforcing unit, and also to block the rotation control unit; the auxiliary positioning unit is installed at the bottom of the rotation control unit and is used to assist in positioning the rotation control unit after installation.

[0007] In at least some embodiments, the connection and installation unit includes: a valve body and a positioning magnet; the valve body has two arc-shaped insertion holes a and two arc-shaped limiting grooves; there are a total of four positioning magnets, and the four positioning magnets are fixedly installed on the valve body.

[0008] In at least some embodiments, the movable reinforcing unit includes: a circular mounting shaft and a movable reinforcing ring; there are two circular mounting shafts, and the two circular mounting shafts are fixedly mounted on the valve body; the movable reinforcing ring is slidably mounted on the valve body and the two circular mounting shafts, and the movable reinforcing ring has two arc-shaped insertion holes b.

[0009] In at least some embodiments, the movable reinforcing unit further includes: a support spring a; there are two support springs a, and the two support springs a are sleeved on the outside of the two circular mounting shafts, and the two support springs a are located on the right side of the movable reinforcing ring.

[0010] In at least some embodiments, the auxiliary multi-purpose unit includes: an arc-shaped plug-in plate and an auxiliary multi-purpose plate; there are four arc-shaped plug-in plates, and the four arc-shaped plug-in plates are inserted into two arc-shaped plug-in holes a and two arc-shaped plug-in holes b; there are two auxiliary multi-purpose plates, and the two auxiliary multi-purpose plates are fixedly installed on the inner side of the four arc-shaped plug-in plates, and a circular through hole is opened on the upper auxiliary multi-purpose plate.

[0011] In at least some embodiments, the rotary control unit includes: a valve core and a rubber sealing ring; the valve core is rotatably mounted on the valve body; there are two rubber sealing rings, and the two rubber sealing rings are mounted on the valve core.

[0012] In at least some embodiments, the rotation control unit further includes: a rectangular limiting block and an arc-shaped mounting rod; there are two rectangular limiting blocks, which are fixedly installed at the bottom of the valve core and inserted into two arc-shaped limiting grooves; there are two arc-shaped mounting rods, which are fixedly installed on the valve core.

[0013] In at least some embodiments, the rotation control unit further includes: a rotation control frame and support springs b; the rotation control frame is rotatably mounted on the valve core and two arc-shaped mounting rods; there are four support springs b in total, and the four support springs b are sleeved on the outside of the two arc-shaped mounting rods.

[0014] In at least some embodiments, the auxiliary positioning unit includes: an auxiliary positioning block and an auxiliary positioning head; the auxiliary positioning block is fixedly installed at the bottom of the valve core and penetrates the valve body; there are two auxiliary positioning heads, and the two auxiliary positioning heads are slidably installed inside the auxiliary positioning block; the outer ends of the two auxiliary positioning heads are provided with rounded corners, and the outer ends of the two auxiliary positioning heads are in contact with the valve body.

[0015] In at least some embodiments, the auxiliary positioning unit further includes a support spring c; the support spring c is installed inside the auxiliary positioning block, and both ends of the support spring c are in contact with the inner ends of the two auxiliary positioning heads.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The two circular mounting shafts of this invention enable the movable reinforcing ring to slide, and the movable reinforcing ring strengthens the valve body, increasing the strength of the valve body; the two support springs a provide elastic support for the movable reinforcing ring.

[0017] 2. The two rubber sealing rings of this invention increase the sealing effect between the valve core and the valve body. The setting of two arc-shaped limiting grooves and two rectangular limiting blocks restricts the rotation angle of the valve core, so that the maximum rotation angle of the valve core is ninety degrees. In addition, the two arc-shaped mounting rods prevent the valve core from rotating in real time with the rotary control frame. When the valve core rotates to a specified angle, it stops rotating, while the rotary control frame can continue to rotate to a certain angle. This ensures accurate opening and closing while avoiding excessive stress on the valve core, thus guaranteeing its normal service life.

[0018] 3. The two auxiliary multi-purpose plates of this invention not only enhance the strength of the valve body, but also prevent the valve core from moving out by blocking the upper auxiliary multi-purpose plate from moving out. When the valve core needs to be disassembled, the operator can simply remove the upper auxiliary multi-purpose plate, thus improving the efficiency of valve core disassembly and installation. In addition, when the top-drive plug valve is in transport, the operator can insert two arc-shaped plug plates into two arc-shaped plug holes a, so that the two auxiliary multi-purpose plates are located on the left side of the valve body, which plays a role in shielding and protecting the external threads on the valve body, preventing the external threads of the valve body from being bumped or damaged; the four positioning magnets play a positioning role for the two auxiliary multi-purpose plates, so that the two auxiliary multi-purpose plates are in a relatively stable state.

[0019] 4. The auxiliary positioning block and two auxiliary positioning heads of this invention provide an auxiliary connection effect for the valve core after installation; when the valve core is disassembled or installed, the two auxiliary positioning heads can automatically slide inward under force, thereby automatically releasing the elastic positioning. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0021] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0022] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram of the present invention is shown; Figure 2 A schematic diagram of the connection and installation unit of the present invention is shown; Figure 3 A schematic diagram of the valve body and movable reinforcing unit of the present invention is shown; Figure 4 A schematic diagram of the auxiliary multi-purpose unit of the present invention is shown; Figure 5 A schematic diagram of the structure of the rotary control unit of the present invention is shown; Figure 6 The present invention is shown. Figure 1 A schematic diagram of the central cross-section structure; Figure 7 The present invention is shown. Figure 6 A magnified schematic diagram of a portion of region A in the middle; Figure 8 A top-view structural schematic diagram of the rotation control unit of the present invention is shown; Figure 9 The present invention is shown. Figure 6 Schematic diagram of the cross-sectional structure in the middle BB direction; Figure 10 The present invention is shown. Figure 9 A magnified schematic diagram of the structure of region C in the middle.

[0023] List of reference numerals in the attached diagram: 100. Connection and installation unit; 101. Valve body; 1011. Arc-shaped insertion hole a; 1012. Arc-shaped limiting groove; 102. Positioning magnet; 200. Movable reinforcing unit; 201. Circular mounting shaft; 202. Movable reinforcing ring; 2021. Arc-shaped insertion hole b; 203. Support spring a; 300. Auxiliary multi-purpose unit; 301. Arc-shaped plug-in board; 302. Auxiliary multi-purpose board; 3021. Circular through hole; 400. Rotary control unit; 401. Valve core; 402. Rubber sealing ring; 403. Rectangular limit block; 404. Arc-shaped mounting rod; 405. Rotary control frame; 406. Support spring b; 500, Auxiliary positioning unit; 501, Auxiliary positioning block; 502, Auxiliary positioning head; 503, Support spring c. Detailed Implementation

[0024] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0025] Example: Please refer to Figures 1 to 10As shown: This invention provides a top-drive plug valve for ultra-high pressure deep wells, comprising: a connecting mounting unit 100, a movable reinforcing unit 200, an auxiliary multi-purpose unit 300, a rotation control unit 400, and an auxiliary positioning unit 500; the movable reinforcing unit 200 is installed on the outside of the connecting mounting unit 100, and is used to improve the strength of the connecting mounting unit 100; the rotation control unit 400 is installed inside the connecting mounting unit 100, and is used to control the opening and closing of the connecting mounting unit 100; the auxiliary multi-purpose unit 300 is installed on the connecting mounting unit 100 and the movable reinforcing unit 200, and is used to protect the external threads of the connecting mounting unit 100, and also to improve the reinforcing effect of the movable reinforcing unit 200, and also to block the rotation control unit 400; the auxiliary positioning unit 500 is installed at the bottom of the rotation control unit 400, and is used to assist in positioning the rotation control unit 400 after installation.

[0026] In this embodiment of the disclosure, such as Figure 2 and Figure 3 As shown, the connection and installation unit 100 includes: a valve body 101 and a positioning magnet 102; the valve body 101 is provided with two arc-shaped insertion holes a1011 and two arc-shaped limiting grooves 1012; there are four positioning magnets 102 in total, and the four positioning magnets 102 are fixedly installed on the valve body 101. The movable reinforcing unit 200 includes: a circular mounting shaft 201 and a movable reinforcing ring 202; there are two circular mounting shafts 201, and the two circular mounting shafts 201 are fixedly mounted on the valve body 101; the movable reinforcing ring 202 is slidably mounted on the valve body 101 and the two circular mounting shafts 201, and the movable reinforcing ring 202 has two arc-shaped insertion holes b2021; the movable reinforcing unit 200 also includes: a support spring a203; there are two support springs a203, and the two support springs a203 are sleeved on the outside of the two circular mounting shafts 201, and the two support springs a203 are located on the right side of the movable reinforcing ring 202; Its specific function is as follows: Since the two circular mounting shafts 201 are fixedly mounted on the valve body 101, and the movable reinforcing ring 202 is slidably mounted on the valve body 101 and the two circular mounting shafts 201, the movable reinforcing ring 202 has a sliding effect, and the movable reinforcing ring 202 strengthens the valve body 101, increasing the strength of the valve body 101; and since the two support springs a203 are sleeved on the outside of the two circular mounting shafts 201, and the two support springs a203 are located on the right side of the movable reinforcing ring 202, they provide elastic support for the movable reinforcing ring 202.

[0027] In this embodiment of the disclosure, such as Figure 5 , Figure 8 and Figure 10 As shown, the rotary control unit 400 includes: a valve core 401 and a rubber sealing ring 402; the valve core 401 is rotatably mounted on the valve body 101; two rubber sealing rings 402 are provided, and the two rubber sealing rings 402 are mounted on the valve core 401; the rotary control unit 400 also includes: a rectangular limiting block 403 and an arc-shaped mounting rod 404; two rectangular limiting blocks 403 are provided, and the two rectangular limiting blocks 403 are fixedly mounted on the bottom of the valve core 401, and the two rectangular limiting blocks 403 are inserted into two arc-shaped limiting grooves 1012; two arc-shaped mounting rods 404 are provided, and the two arc-shaped mounting rods 404 are fixedly mounted on the valve core 401; the rotary control unit 400 also includes: a rotary control frame 405 and support springs b406; the rotary control frame 405 is rotatably mounted on the valve core 401 and the two arc-shaped mounting rods 404; four support springs b406 are provided, and the four support springs b406 are sleeved on the outside of the two arc-shaped mounting rods 404; Its specific function is as follows: because the two rubber sealing rings 402 are installed on the valve core 401, the sealing effect between the valve core 401 and the valve body 101 is increased; and because the valve body 101 has two arc-shaped limiting grooves 1012, and two rectangular limiting blocks 403 are fixedly installed at the bottom of the valve core 401, and the two rectangular limiting blocks 403 are inserted into the two arc-shaped limiting grooves 1012, the rotation angle of the valve core 401 is limited, so that the maximum rotation angle of the valve core 401 is ninety degrees. Furthermore, because the two arc-shaped mounting rods 404 are fixedly mounted on the valve core 401, and the rotation control frame 405 is rotatably mounted on the valve core 401 and the two arc-shaped mounting rods 404, the valve core 401 can rotate without following the rotation control frame 405 in real time. Also, because the four support springs b406 are sleeved on the outside of the two arc-shaped mounting rods 404, when the valve core 401 rotates to a specified angle, the valve core 401 stops rotating, and the rotation control frame 405 can continue to rotate to a certain angle. Under the premise of ensuring accurate opening and closing, the valve core 401 is not subjected to excessive force, thus ensuring the normal service life of the valve core 401.

[0028] In this embodiment of the disclosure, such as Figure 4 As shown, the auxiliary multi-purpose unit 300 includes: an arc-shaped plug-in plate 301 and an auxiliary multi-purpose plate 302; there are four arc-shaped plug-in plates 301, and the four arc-shaped plug-in plates 301 are inserted into two arc-shaped plug-in holes a1011 and two arc-shaped plug-in holes b2021; there are two auxiliary multi-purpose plates 302, and the two auxiliary multi-purpose plates 302 are fixedly installed on the inner side of the four arc-shaped plug-in plates 301, and a circular through hole 3021 is opened on the upper auxiliary multi-purpose plate 302; Its specific function is as follows: Since the four arc-shaped plug-in plates 301 are inserted into the two arc-shaped plug-in holes a1011 and the two arc-shaped plug-in holes b2021, and the two auxiliary multi-purpose plates 302 are fixedly installed on the inner side of the four arc-shaped plug-in plates 301, on the one hand, the two auxiliary multi-purpose plates 302 further enhance the strength of the valve body 101; on the other hand, the upper auxiliary multi-purpose plate 302 and the valve core 401 act as a barrier, preventing the valve core 401 from moving out; when the valve core 401 needs to be disassembled, the operator can simply remove the upper auxiliary multi-purpose plate 302, thus improving the efficiency of disassembling and installing the valve core 401. In addition, since the four positioning magnets 102 are fixedly installed on the valve body 101, when the top drive plug valve is in the transport state, the operator can insert the two arc-shaped plug plates 301 into the two arc-shaped plug holes a1011, so that the two auxiliary multi-purpose plates 302 are located on the left side of the valve body 101, which plays a role in shielding and protecting the external threads on the valve body 101, preventing the external threads of the valve body 101 from being bumped or damaged; the four positioning magnets 102 play a positioning role for the two auxiliary multi-purpose plates 302, so that the two auxiliary multi-purpose plates 302 are in a relatively stable state.

[0029] In this embodiment of the disclosure, such as Figure 5 and Figure 7 As shown, the auxiliary positioning unit 500 includes: an auxiliary positioning block 501 and an auxiliary positioning head 502; the auxiliary positioning block 501 is fixedly installed at the bottom of the valve core 401 and passes through the valve body 101; there are two auxiliary positioning heads 502, and the two auxiliary positioning heads 502 are slidably installed inside the auxiliary positioning block 501; the outer ends of the two auxiliary positioning heads 502 are rounded, and the outer ends of the two auxiliary positioning heads 502 are in contact with the valve body 101; the auxiliary positioning unit 500 also includes: a support spring c503; the support spring c503 is installed inside the auxiliary positioning block 501, and the two ends of the support spring c503 are in contact with the inner ends of the two auxiliary positioning heads 502; Its specific function is as follows: Since the auxiliary positioning block 501 penetrates the valve body 101, and the two auxiliary positioning heads 502 are slidably installed inside the auxiliary positioning block 501, and the outer ends of the two auxiliary positioning heads 502 are in contact with the valve body 101, it plays an auxiliary connection role for the installed valve core 401; since the outer ends of the two auxiliary positioning heads 502 are rounded, and the support spring c503 is installed inside the auxiliary positioning block 501, and the two ends of the support spring c503 are in contact with the inner ends of the two auxiliary positioning heads 502, when the valve core 401 is disassembled or installed, the two auxiliary positioning heads 502 can automatically slide inward after being subjected to force, thereby realizing the automatic release of elastic positioning.

[0030] The specific usage and function of this embodiment are as follows: When the top-drive plug valve is in transport, the operator can insert two arc-shaped plug plates 301 into two arc-shaped plug holes a1011, positioning the two auxiliary multi-purpose plates 302 on the left side of the valve body 101. This protects the external threads on the valve body 101, preventing them from being bumped or damaged. Four positioning magnets 102 position the two auxiliary multi-purpose plates 302, keeping them in a relatively stable state. When needed, the movable reinforcing ring 202 is slid to the right, and then the four arc-shaped plug plates 301 are inserted into the two arc-shaped plug holes a1011 and the two arc-shaped plug holes b2021. This allows the two... The auxiliary multi-purpose plate 302 further enhances the strength of the valve body 101. Furthermore, the upper auxiliary multi-purpose plate 302 and valve core 401 act as a barrier, preventing the valve core 401 from shifting out. The movable reinforcing ring 202 strengthens the valve body 101, increasing its overall strength. When the valve core 401 rotates to a specified angle, it stops rotating, while the rotation control frame 405 can continue to rotate a certain angle. This ensures accurate opening and closing while preventing excessive stress on the valve core 401, thus guaranteeing its normal service life. When the valve core 401 is disassembled or installed, the two auxiliary positioning heads 502 automatically slide inward under pressure, automatically releasing the elastic positioning.

[0031] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0032] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0033] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A top-drive plug valve for ultra-high pressure deep wells, comprising a connection and installation unit (100); characterized in that, A movable reinforcing unit (200) is installed on the outside of the connecting mounting unit (100) to increase the strength of the connecting mounting unit (100); a rotation control unit (400) is installed inside the connecting mounting unit (100) to control the opening and closing of the connecting mounting unit (100); an auxiliary multi-purpose unit (300) is installed on the connecting mounting unit (100) and the movable reinforcing unit (200). The auxiliary multi-purpose unit (300) is used to protect the external threads of the connecting mounting unit (100), and also to improve the reinforcing effect of the movable reinforcing unit (200). Furthermore, the auxiliary multi-purpose unit (300) also blocks the rotation control unit (400). The bottom of the rotary control unit (400) is equipped with an auxiliary positioning unit (500), which is used to assist in positioning the rotary control unit (400) after installation; the connection and installation unit (100) includes a valve body (101); the movable reinforcing unit (200) includes a circular mounting shaft (201) and a movable reinforcing ring (202); the movable reinforcing ring (202) is slidably installed on the valve body (101) and the two circular mounting shafts (201); the auxiliary multi-purpose unit (300) includes an arc-shaped plug-in plate (301) and an auxiliary multi-purpose plate (302); there are two auxiliary multi-purpose plates (302), and the two auxiliary multi-purpose plates (302) are fixedly installed on the inner side of the four arc-shaped plug-in plates (301).

2. The top-drive plug valve for ultra-high pressure deep wells according to claim 1, characterized in that, The connection and installation unit (100) further includes: a positioning magnet (102); the valve body (101) is provided with two arc-shaped insertion holes a (1011) and two arc-shaped limiting grooves (1012); there are four positioning magnets (102) in total, and the four positioning magnets (102) are fixedly installed on the valve body (101).

3. The top-drive plug valve for ultra-high pressure deep wells according to claim 2, characterized in that, There are two circular mounting shafts (201), and the two circular mounting shafts (201) are fixedly mounted on the valve body (101); the movable reinforcing ring (202) has two arc-shaped insertion holes b (2021).

4. The top-drive plug valve for ultra-high pressure deep wells according to claim 1, characterized in that, The movable reinforcing unit (200) further includes: a support spring a (203); there are two support springs a (203), and the two support springs a (203) are sleeved on the outside of the two circular mounting shafts (201), and the two support springs a (203) are located on the right side of the movable reinforcing ring (202).

5. A top-drive plug valve for ultra-high pressure deep wells according to claim 3, characterized in that, There are four arc-shaped plug-in plates (301), and the four arc-shaped plug-in plates (301) are inserted into two arc-shaped plug-in holes a (1011) and two arc-shaped plug-in holes b (2021); the auxiliary multi-purpose plate (302) above is provided with a circular through hole (3021).

6. A top-drive plug valve for ultra-high pressure deep wells according to claim 2, characterized in that, The rotary control unit (400) includes a valve core (401) and a rubber sealing ring (402); the valve core (401) is rotatably mounted on the valve body (101); there are two rubber sealing rings (402), and the two rubber sealing rings (402) are mounted on the valve core (401).

7. A top-drive plug valve for ultra-high pressure deep wells according to claim 6, characterized in that, The rotary control unit (400) further includes: a rectangular limiting block (403) and an arc-shaped mounting rod (404); there are two rectangular limiting blocks (403), and the two rectangular limiting blocks (403) are fixedly installed on the bottom of the valve core (401), and the two rectangular limiting blocks (403) are inserted into two arc-shaped limiting grooves (1012); there are two arc-shaped mounting rods (404), and the two arc-shaped mounting rods (404) are fixedly installed on the valve core (401).

8. A top-drive plug valve for ultra-high pressure deep wells according to claim 7, characterized in that, The rotary control unit (400) further includes a rotary control frame (405) and support springs b (406); the rotary control frame (405) is rotatably mounted on the valve core (401) and two arc-shaped mounting rods (404); there are four support springs b (406), and the four support springs b (406) are sleeved on the outside of the two arc-shaped mounting rods (404).

9. A top-drive plug valve for ultra-high pressure deep wells according to claim 6, characterized in that, The auxiliary positioning unit (500) includes: an auxiliary positioning block (501) and an auxiliary positioning head (502); the auxiliary positioning block (501) is fixedly installed at the bottom of the valve core (401) and the auxiliary positioning block (501) penetrates the valve body (101); there are two auxiliary positioning heads (502), and the two auxiliary positioning heads (502) are slidably installed inside the auxiliary positioning block (501); the outer ends of the two auxiliary positioning heads (502) are provided with rounded corners, and the outer ends of the two auxiliary positioning heads (502) are in contact with the valve body (101).

10. A top-drive plug valve for ultra-high pressure deep wells according to claim 9, characterized in that, The auxiliary positioning unit (500) further includes a support spring c (503); the support spring c (503) is installed inside the auxiliary positioning block (501), and the two ends of the support spring c (503) are in contact with the inner ends of the two auxiliary positioning heads (502).

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