High pressure filling tool assembly

Abstract

The present invention belongs to the technical field of downhole tools in oil and gas fields, and in particular, relates to a high-pressure filling tool assembly. It avoids the safety hazards of using high-pressure water hoses as fracturing pipelines and pressure-driven pipe columns. It includes a tool assembly body and a plug for use in conjunction with each other, the plug including a plug body, a sealing leather cup is provided on the upper outer wall of the plug body, and a clamping ring is provided on the outer wall of the middle part of the plug body. After the tool assembly body is lowered into a predetermined position in the well, the plug is inserted into the oil pipe, and the plug enters the inner cavity of the body. The clamping ring is an annular groove mechanism, the clamping ring rebounds, and the diameter becomes smaller and enters the inner shear sleeve of the assembly body. The pointed tooth shape of the outer wall of the clamping ring is connected with the pointed groove of the upper inner hole of the inner shear sleeve, and the plug body is limited by the shoulder of the inner shear sleeve.

Description

Technical Field

[0001] The invention belongs to the technical field of downhole tools in oil and gas fields, and in particular relates to a high-pressure filling tool assembly. Background Art

[0002] After using high-pressure filling tools to fractur e the measured layer and circulate sand filling in the casing annulus, the filling channel needs to be closed, otherwise the filled sand will flow back, causing the filling and sand prevention failure. The high-pressure filling tools used in the prior art close the filling channel by lifting the tubing. This operation method has the following main disadvantages: 1. When the sliding wellhead is not used: it is necessary to disassemble the wellhead, lift the tubing string open to close the filling channel, and reverse the pipeline to wash the well, which is time-consuming and has safety hazards. There is a high risk of sand backflow, which may cause obstruction when lifting the tubing string.

[0003] 2. When using a sliding wellhead: a high-pressure water hose is used as the fracturing pipeline during filling. After filling, the formation pressure is high, which pressurizes the pipe string and poses a safety hazard.

[0004] The current tools have the following problems: ① When the sliding wellhead is not used: the wellhead needs to be disassembled, the opening is lifted up to close the filling channel, and the pipeline is reversed to wash the well, which is time-consuming and has safety hazards. The risk of sand filling backspitting is high, which may cause the pipe string to be blocked. ② When the sliding wellhead is used: a high-pressure water hose is used as the fracturing pipeline during filling. After filling, the formation pressure is high, and the pipe string is moved with pressure, which poses a safety hazard. Summary of the invention

[0005] The present invention aims at the defects of the prior art and provides a high-pressure filling tool assembly. It overcomes the shortcomings of the prior art, meets the requirements of not moving the pipe string after fracturing and oil casing annulus circulation filling, and temporarily closes the filling channel by reverse circulation well washing. After the pressure balance in the well allows the wellhead to be removed, the tool is discarded and the filling channel is permanently closed, avoiding the safety hazards of using high-pressure water hoses as fracturing pipelines and moving pipe strings with pressure.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme, including a tool assembly and a plug for use in conjunction with each other, characterized in that the plug includes a plug body, a sealing leather cup is provided on the upper outer wall of the plug body, and a clamping ring is provided on the outer wall of the middle part of the plug body.

[0007] After the tool body is lowered to a predetermined position in the well, a plug is put into the oil pipe and enters the inner cavity of the body. The clamping ring is an annular groove mechanism. The clamping ring rebounds and its diameter decreases to enter the inner shear sleeve of the body. The pointed tooth profile of the outer wall of the clamping ring is connected with the pointed groove of the upper inner hole of the inner shear sleeve, and the plug body is limited by the shoulder of the inner shear sleeve.

[0008] Furthermore, a sealing rubber sleeve four is provided on the lower outer wall of the plug body.

[0009] Furthermore, the tool body includes an upper joint, a release sleeve, and a locking sleeve. The release sleeve is threadedly connected to the upper joint and the locking sleeve respectively. The locking sleeve is connected to the shear pin of the release sleeve. The locking sleeve is provided with a liquid hole. The locking sleeve is threadedly connected to the pressing sleeve. The locking sleeve is threadedly connected to the claw spring. The upper part of the claw spring is provided with a liquid hole.

[0010] The inner wall of the lower part of the locking sleeve is provided with an annular groove, the lower locking spring is installed in the annular groove, the lower end of the unsealing sleeve is provided with an open groove, the upper part of the cylinder sleeve is provided with a pin, and the pin is installed in the open groove.

[0011] An annular groove is arranged on the inner wall of the upper part of the cylinder sleeve, and the upper locking spring is installed in the annular groove. A thread is arranged on the inner wall of the lower end of the cylinder sleeve, and the upper pressure ring is threadedly connected with the cylinder sleeve.

[0012] A semicircular ring groove is provided on the claw spring, a limiting clamp ring is installed in the semicircular ring groove, the auxiliary piston is installed on the claw spring, the auxiliary piston is limited between the locking sleeve and the limiting clamp ring, a threaded hole is provided at the lower part of the auxiliary piston, and the auxiliary piston is connected with the upper pressure ring shear pin.

[0013] A clamping block groove is arranged on the upper part of the upper pressure ring, a clamping block groove is arranged on the claw spring, a clamping block is installed in the clamping block groove, and the clamping block is limited in the clamping block groove by the auxiliary piston.

[0014] The upper cone is installed on the lower part of the upper pressure ring, the shoulder is limited, the rubber cylinder is installed on the upper pressure ring, and the rubber cylinder is limited between the upper pressure ring and the upper cone; the lower part of the upper cone is installed on the upper inner cavity of the slip cover, the shoulder is limited, the slip cover is provided with a slip groove, and the slip is installed in the slip groove.

[0015] The spring is installed between the slip cover and the slip, the upper part of the lower cone is installed in the lower inner cavity of the slip cover, the shoulder is limited, the slip is limited between the upper cone and the lower cone, the claw spring is threadedly connected to the lower cone; the outer channel and the lower cone are threadedly connected, and the sealing rubber sleeve and the limiting sleeve are installed in the upper inner cavity of the outer channel.

[0016] The anti-rotation sleeve is threadedly connected to the outer channel, and the sealing rubber sleeve 1 and the limiting sleeve are limited by the anti-rotation sleeve and the outer channel.

[0017] A filling channel is arranged in the middle part of the outer channel, an axial liquid hole is arranged on the inner wall of the outer channel, the axial liquid hole and the filling channel do not interfere with each other, and a sealing rubber sleeve is installed in the lower inner cavity of the outer channel.

[0018] The lock spring seat is threadedly connected to the outer channel, the sealing rubber sleeve is limited by the lock spring seat and the outer channel, an annular groove is provided at the lower part of the lock spring seat, the small lock spring is installed in the annular groove, the outer channel and the lower joint are threadedly connected, an annular groove is provided on the lower inner wall of the lower joint, and the retaining ring is installed in the annular groove.

[0019] The upper joint and the drag reduction limit sleeve are threadedly connected, the upper outer wall of the hanging sleeve is provided with an annular groove, a small steel ball is installed in the annular groove, the upper shoulder of the hanging sleeve is installed between the lower shoulder of the upper joint and the upper shoulder of the drag reduction limit sleeve, the hanging sleeve is limited by the upper inner cavity shoulder of the drag reduction limit sleeve and the internal shoulder of the claw spring, the middle part of the hanging sleeve is provided with a setting seal liquid inlet hole, the outer wall of the middle part of the hanging sleeve is provided with an axial liquid passage, and the axial liquid passage and the setting seal liquid inlet hole do not interfere with each other.

[0020] The hanging sleeve is threadedly connected to the inner channel, a threaded hole is arranged at the lower part of the hanging sleeve, the inner closing sleeve and the hanging sleeve are connected by shear pins, the inner shear sleeve is arranged to the inner hole at the upper end of the inner closing sleeve, and the inner shear sleeve and the inner closing sleeve are shear pinned.

[0021] The inner hole at the upper end of the inner shear sleeve is provided with locking teeth, and the outer wall of the upper part of the inner closing sliding sleeve is provided with a sealing rubber sleeve 2.

[0022] The inner channel is connected with the anti-rotation sleeve by a sliding key, a filling channel is arranged at the upper part of the inner channel, a limiting shoulder is arranged at the inner hole at the lower middle part of the inner channel, a liquid passing hole is arranged at the lower part of the inner channel, and a liquid passing groove is arranged at the lower part of the inner channel.

[0023] The closing sleeve is installed on the outer wall of the middle part of the inner channel, a threaded hole is provided at the lower part of the closing sleeve, the closing sleeve and the inner channel shear pin are connected, a locking thread is provided at the lower part of the closing sleeve, the upper inner hole of the sealing piston is in contact with the lower end of the closing sleeve for limiting the position, a threaded hole is provided at the lower part of the sealing piston, and the sealing piston and the inner channel shear pin are fixedly connected.

[0024] Furthermore, the lower outer wall of the upper joint is provided with a thread, the upper end and the upper inner wall of the unsealing sleeve are provided with a thread, the upper outer wall of the locking sleeve is provided with a thread, and the unsealing sleeve is threadedly connected to the upper joint and the locking sleeve; a threaded hole is provided on the upper part of the locking sleeve, and a liquid hole is provided in the middle part of the locking sleeve; a keyway is provided on the upper part of the locking sleeve, a keyway is provided on the outer wall of the middle part of the unsealing sleeve, an upper sliding key is installed in the keyway, the lower inner wall of the pressing sleeve is provided with a thread, the upper outer wall of the locking sleeve is provided with a thread, and the upper sliding key is fixed in the keyway by the pressing sleeve; a keyway is provided on the lower part of the locking sleeve, a keyway is provided on the upper outer wall of the claw spring, and the lower sliding key is installed in the keyway.

[0025] Furthermore, the lower outer wall of the hanging sleeve is provided with a thread, the upper inner wall of the inner channel is provided with a thread, the hanging sleeve and the inner channel are threadedly connected, the lower part of the hanging sleeve is provided with a threaded hole, the inner closing sleeve and the hanging sleeve are connected by a shear pin, the inner shear sleeve is arranged to the inner hole of the upper end of the inner closing sleeve, the inner shear sleeve and the inner closing sleeve are shear pin-fixed, the inner hole at the upper end of the inner shear sleeve is provided with locking teeth, and the upper outer wall of the inner closing sleeve is provided with two sealing rubber sleeves; a filling channel is provided at the upper part of the inner channel, a limiting shoulder is provided at the inner hole in the middle and lower part of the inner channel, a liquid hole is provided at the lower part of the inner channel, and a liquid trough is provided at the lower part of the inner channel.

[0026] Furthermore, the lower outer wall of the lower cone is provided with threads, and the inner wall of the upper end of the outer channel is provided with threads; the inner wall of the lower end of the outer channel is provided with threads, and the upper outer wall of the lower joint is provided with threads.

[0027] Furthermore, a key block structure is provided on the upper part of the inner channel, a key slot structure is provided on the inner wall of the anti-rotation sleeve, and the key block is inserted into the key slot; thus, the inner channel and the anti-rotation sleeve are connected by a sliding key.

[0028] Compared with the prior art, the present invention has beneficial effects.

[0029] The present invention satisfies the requirement of not moving the tubing string after fracturing and oil casing annulus circulation filling, temporarily closing the filling channel by reverse circulation well washing, and after the pressure balance in the well allows the wellhead to be removed; the tool is discarded and the filling channel is permanently closed, thus avoiding the potential safety hazard of using a high-pressure water hose as a fracturing pipeline and a pressure-moving tubing string when a sliding wellhead is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. The protection scope of the present invention is not limited to the following description.

[0031] Figure 1 This is a diagram of the filling tool-body structure.

[0032] Figure 2 This is the structural diagram of the high-pressure filling tool - plugger.

[0033] Figure 3 for Figure 1 AA section diagram.

[0034] Figure 4 for Figure 1 BB cross-section diagram.

[0035] Figure 5 It is an enlarged schematic diagram of the upper half of the filling tool-body.

[0036] Figure 6 It is an enlarged schematic diagram of the lower half of the filling tool-body.

[0037] Figure 7 This is the clamp ring parts diagram. DETAILED DESCRIPTION

[0038] like Figure 1-7As shown, the assembly tool body of the present invention includes: the lower outer wall of the upper joint 1 is provided with a thread, the upper end and the upper inner wall of the unsealing sleeve 4 are provided with a thread, the upper outer wall of the locking sleeve 5 is provided with a thread, the unsealing sleeve 4 is threadedly connected with the upper joint 1 and the locking sleeve 5, the upper part of the locking sleeve 5 is provided with a threaded hole, the locking sleeve 5 and the lifting sleeve 8 are shear pin-connected, the middle part of the locking sleeve 5 is provided with a liquid hole, the lower part of the locking sleeve 5 is provided with a keyway, the middle part of the lifting sleeve 8 is provided with a keyway on the outer wall, the upper sliding key 7 is installed in the keyway, the lower end inner wall of the pressing sleeve 6 is provided with a thread, the upper outer wall of the locking sleeve 5 is provided with a thread, the locking sleeve 5 and the pressing sleeve 6 are threadedly connected, the upper sliding key 7 is fixed in the keyway by the pressing sleeve 6, the inner wall of the middle part of the locking sleeve 5 is provided with a thread, the upper outer wall of the claw spring 11 is provided with a thread, the claw spring 11 and the locking sleeve 5 are threadedly connected The lower part of the locking sleeve 5 is provided with a keyway, the upper outer wall of the claw spring 11 is provided with a keyway, the lower key 12 is installed in the keyway, the upper part of the claw spring 11 is provided with a liquid hole, the lower inner wall of the locking sleeve 5 is provided with a ring groove, the lower locking spring 13 is installed in the ring groove, the lower end of the unsealing sleeve 4 is provided with an open groove, the upper part of the cylinder sleeve 9 is provided with a pin, the pin is installed in the open groove, the upper inner wall of the cylinder sleeve 9 is provided with a ring groove, the upper locking spring 10 is installed in the ring groove, the inner wall of the lower end of the cylinder sleeve 9 is provided with a thread, the upper outer wall of the upper pressure ring 17 is provided with a thread, the upper pressure ring 17 is threadedly connected with the cylinder sleeve 9, the claw spring 11 is provided with a semicircular ring groove, the limiting snap ring 15 is installed in the semicircular ring groove, the auxiliary piston 14 is installed on the claw spring 11, the auxiliary piston 14 is limited to between the locking sleeve 5 and the limiting snap ring 15, and the lower part of the auxiliary piston 14 is provided with a thread The auxiliary piston 14 is connected with the upper pressure ring 17 by shear pins. A block groove is provided on the upper part of the upper pressure ring 17. A block groove is provided on the claw spring 11. The block 16 is installed in the block groove. The block 16 is limited to the block groove by the auxiliary piston 14. The upper cone 19 is installed on the lower part of the upper pressure ring 17. The shoulder is limited. The rubber cylinder 18 is installed on the upper pressure ring 17. The rubber cylinder 18 is limited to between the upper pressure ring 17 and the upper cone 19. The lower part of the upper cone 19 is installed in the upper inner cavity of the slip cover 20. The shoulder is limited. The slip cover 20 is provided with a slip groove. The slip 21 is installed in the slip groove. The spring 22 is installed between the slip cover 20 and the slip 21. The upper part of the lower cone 23 is installed in the lower inner cavity of the slip cover 20. The shoulder is limited. The slip 21 is limited to between the upper cone 19 and the lower cone 23. The inner wall of the upper end of the lower cone 23 is provided with a thread, the outer wall of the lower part of the claw spring 11 is provided with a thread, the claw spring 11 and the lower cone 23 are threadedly connected, the lower outer wall of the lower cone 23 is provided with a thread, the inner wall of the upper end of the outer channel 25 is provided with a thread, the outer channel 25 and the lower cone 23 are threadedly connected, the sealing rubber sleeve 1 28 and the limiting sleeve 27 are installed in the upper inner cavity of the outer channel 25, the upper inner wall of the outer channel 25 is provided with a thread, the upper outer wall of the anti-rotation sleeve 26 is provided with a thread, the anti-rotation sleeve 26 and the outer channel 25 are threadedly connected, the sealing rubber sleeve 1 28 and the limiting sleeve 27 are limited by the anti-rotation sleeve 26 and the outer channel 25, the middle part of the outer channel 25 is provided with a filling channel, the inner wall of the outer channel 25 is provided with an axial liquid hole, the axial liquid hole and the filling channel do not interfere, and the sealing rubber sleeve 3 39 is installed in the lower inner cavity of the outer channel 25.The inner wall of the lower part of the outer channel 25 is provided with threads, the outer wall of the upper end of the lock spring seat 29 is provided with threads, the lock spring seat 29 and the outer channel 25 are threadedly connected, the sealing rubber sleeve 39 is limited by the lock spring seat 29 and the outer channel 25, the lower part of the lock spring seat 29 is provided with an annular groove, the small lock spring 30 is installed in the annular groove, the inner wall of the lower end of the outer channel 25 is provided with threads, the upper outer wall of the lower joint 32 is provided with threads, the outer channel 25 and the lower joint 32 are threadedly connected, the lower inner wall of the lower joint 32 is provided with an annular groove, and the retaining ring 34 is installed in the annular groove.

[0039] The lower inner wall of the upper joint 1 is provided with a thread, the lower outer wall of the drag reduction limit sleeve 2 is provided with a thread, the upper joint 1 and the drag reduction limit sleeve 2 are threadedly connected, the upper outer wall of the hanging sleeve 3 is provided with a ring groove, the small steel ball 38 is installed in the ring groove, the upper shoulder of the hanging sleeve 3 is installed between the lower shoulder of the upper joint 1 and the upper shoulder of the drag reduction limit sleeve 2, the hanging sleeve 3 is limited by the upper inner cavity shoulder of the drag reduction limit sleeve 2 and the internal shoulder of the claw spring 11, the middle part of the hanging sleeve 3 is provided with a sealing liquid inlet hole, and the middle of the hanging sleeve 3 Part of the outer wall is provided with an axial liquid passage, the axial liquid passage and the setting seal liquid inlet hole do not interfere, the lower outer wall of the hanging sleeve 3 is provided with a thread, the upper inner wall of the inner channel 24 is provided with a thread, the hanging sleeve 3 and the inner channel 24 are threadedly connected, the lower part of the hanging sleeve 3 is provided with a threaded hole, the inner closing sleeve 35 and the hanging sleeve 3 are connected by a shear pin, the inner shear sleeve 37 is installed in the inner hole of the upper end of the inner closing sleeve 35, the inner shear sleeve 37 and the inner closing sleeve 35 are shear-pinned, and the upper end of the inner shear sleeve 37 The inner hole is provided with locking teeth, the upper outer wall of the inner closing sliding sleeve 35 is provided with a sealing rubber sleeve 2 36, the lower outer wall of the hanging sleeve 3 is provided with a thread, the upper inner wall of the inner channel 24 is provided with a thread, the inner channel 24 and the hanging sleeve 3 are threadedly connected, the upper part of the inner channel 24 is provided with a key block structure, the inner wall of the anti-rotation sleeve 26 is provided with a keyway structure, the key block is inserted into the keyway, the inner channel 24 and the anti-rotation sleeve 26 are connected by a sliding key, the upper part of the inner channel 24 is provided with a filling channel, and the inner hole at the lower middle part of the inner channel 24 is provided with a limit platform A shoulder is provided at the lower part of the inner channel 24 with a liquid hole, a liquid groove is provided at the lower part of the inner channel 24, a closing sleeve 31 is installed on the outer wall of the middle part of the inner channel 24, a threaded hole is provided at the lower part of the closing sleeve 31, the closing sleeve 31 and the inner channel 24 are connected by shear pins, a locking thread is provided at the lower part of the closing sleeve 31, the upper inner hole of the sealing piston 33 is in contact with the lower end of the closing sleeve 31 for limiting, a threaded hole is provided at the lower part of the sealing piston 33, and the sealing piston 33 and the inner channel 24 are connected by shear pins.

[0040] A sealing leather cup 43 is provided on the upper outer wall of the plug body 41 , a clamping ring 42 is provided on the middle part of the plug body 41 , and a sealing rubber sleeve 40 is provided on the lower outer wall of the plug body 41 .

[0041] Working principle of the present invention: initial sealing: lower the high-pressure filling tool assembly-main body (hereinafter referred to as the main body) to the designed position, and put the high-pressure filling tool assembly-plug (hereinafter referred to as the plug) from the oil pipe. The oil pipe is pressurized to send the plug into the inner cavity of the main body, so that the clamping ring on the plug enters the inner shear sleeve of the main body, the clamping ring and the plug are locked into the inner shear sleeve, and the pressure is continued. The liquid enters the liquid hole of the claw spring from the liquid hole of the hanging sleeve, and enters the space between the auxiliary piston and the upper pressure ring. The shear pin connecting the auxiliary piston and the upper pressure ring is sheared off, and the upper pressure ring is pushed by the hydraulic pressure, driving the upper cone to move downward, so that the slip is anchored, and the upper pressure ring continues to move downward, the compression rubber cylinder is sealed, and the slip is further anchored to control the initial sealing pressure to ensure that the sealing is sufficient while the inner closing sleeve is not opened.

[0042] Seal verification: After the initial seal is set, close the tubing, maintain the tubing pressure, and pressurize the casing annulus. The pressure is transmitted to the seal verification piston through the liquid inlet hole in the middle part of the locking sleeve, the axial channel on the upper outer wall of the hanging sleeve, and the axial channel on the inner wall of the outer channel. Stop pressurizing and maintain the seal verification pressure for a certain period of time. If the pressure does not drop, it means that the tool seal verification is successful. After the seal verification is completed, continue to pressurize the casing annulus and increase the pressure to the opening pressure of the seal verification piston. A sudden drop in pressure means that the seal verification piston has been opened.

[0043] Complete sealing: Continue to pressurize the tubing and increase the pressure to the opening pressure of the inner closing sleeve. A sudden drop in pressure indicates that the inner closing sleeve is open and the filling channel is open.

[0044] Extrusion filling: The casing annulus is closed, sand-carrying fluid is added to the tubing, and the sand-carrying fluid is squeezed into the formation through the filling channel.

[0045] Circular filling: open the casing annulus, add sand-carrying fluid into the oil pipe, and the sand in the sand-carrying fluid will be retained in the casing annulus below the rubber sleeve. The liquid will be discharged back to the casing annulus above the rubber sleeve through the liquid holes on the inner channel, the axial channel on the inner wall of the outer channel, the axial channel on the upper outer wall of the hanging sleeve, and the liquid holes in the middle part of the locking sleeve, and then back to the ground. When the sand buries the signal screen pipe, the pressure of the ground pump truck increases, the displacement decreases, and the circular filling is completed.

[0046] Reverse circulation well washing: After the circulation filling is completed, the oil pipe is opened and the washing fluid is pumped into the annulus of the oil casing. The washing fluid enters the inner cavity of the tool through the liquid inlet hole in the middle part of the locking sleeve, the axial channel on the outer wall of the upper part of the hanging sleeve, and the axial channel on the inner wall of the outer channel. Since the plug is locked inside the inner shear sleeve, the inner shear sleeve is connected to the shear pin of the inner closing sleeve. Under the action of hydraulic pressure, the plug moves upward with the inner shear sleeve and the inner closing sleeve. The inner closing sleeve temporarily closes the filling channel. The increased pressure cuts the shear pin, and the plug moves upward with the inner shear sleeve and is discharged out of the well through the oil pipe.

[0047] Release: The pressure in the well is balanced, allowing the wellhead to be opened when it is allowed to move. The thread between the lifting sleeve and the locking sleeve will be reversed by rotating the tubing forward, the tubing will be lifted, the sliding sleeve will be closed and moved upward, and the filling channel will be closed.

[0048] Unsealing: lower the salvage tool to dock with the lifting and releasing sleeve, lift the pipe string, and the lifting and releasing sleeve drives the locking sleeve, cylinder sleeve, upper pressure ring and upper cone to move upward, and the packer is unsealed and unstuck.

[0049] The present invention can meet the requirement of not moving the pipe string after fracturing and oil casing annulus circulation filling, temporarily close the filling channel by reverse circulation well washing, and after the pressure balance in the well allows the wellhead to be removed, the tool is discarded and the filling channel is permanently closed, avoiding the safety hazard of using a high-pressure water hose as a fracturing pipeline and a pressure-moving pipe string when the existing tool adopts a sliding wellhead.

[0050] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A high-pressure filling tool assembly, including a tool assembly body and a plugging device used in conjunction with each other, characterized in that: The plug comprises a plug body (41), the upper outer wall of the plug body (41) is provided with a sealing leather cup (43), and the middle outer wall of the plug body (41) is provided with a clamping ring (42); After the tool body is lowered to a predetermined position in the well, a plug is inserted into the oil pipe, and the plug enters the inner cavity of the body. The clamping ring (42) is an annular slotted mechanism. The clamping ring (42) rebounds and its diameter decreases to enter the inner shear sleeve (37) of the tool body. The pointed tooth profile of the outer wall of the clamping ring (42) is butted against the pointed groove of the upper inner hole of the inner shear sleeve (37). The plug body (41) is limited by the shoulder of the inner shear sleeve (37). The tool assembly comprises an upper joint (1), a release sleeve (4), and a locking sleeve (5); the release sleeve (4) is threadedly connected to the upper joint (1) and the locking sleeve (5), respectively; the locking sleeve (5) is connected to the release sleeve (8) by a shear pin; the locking sleeve (5) is provided with a fluid hole; the locking sleeve (5) is threadedly connected to the pressure sleeve (6); the locking sleeve (5) is threadedly connected to the claw spring (11), and the upper part of the claw spring (11) is provided with a fluid hole; The inner wall of the lower part of the locking sleeve (5) is provided with an annular groove, the lower locking spring (13) is installed in the annular groove, the lower end of the unsealing sleeve (4) is provided with an open groove, the upper part of the cylinder sleeve (9) is provided with a pin, and the pin is installed in the open groove; An annular groove is provided on the inner wall of the upper part of the cylinder sleeve (9), and the upper locking spring (10) is installed in the annular groove. A thread is provided on the inner wall of the lower end of the cylinder sleeve (9), and the upper pressure ring (17) is threadedly connected to the cylinder sleeve (9); A semicircular ring groove is provided on the claw spring (11), a limiting snap ring (15) is installed in the semicircular ring groove, the auxiliary piston (14) is installed on the claw spring (11), the auxiliary piston (14) is limited between the locking sleeve (5) and the limiting snap ring (15), a threaded hole is provided at the lower part of the auxiliary piston (14), and the auxiliary piston (14) is connected to the upper pressure ring (17) by a shear pin; A clamping block groove is provided on the upper portion of the upper pressure ring (17), a clamping block groove is provided on the claw spring (11), a clamping block (16) is installed in the clamping block groove, and the clamping block (16) is limited in the clamping block groove by the auxiliary piston (14); The upper cone (19) is mounted on the lower part of the upper pressure ring (17) and is limited by a shoulder. The rubber cylinder (18) is mounted on the upper pressure ring (17) and is limited between the upper pressure ring (17) and the upper cone (19). The lower part of the upper cone (19) is mounted on the upper inner cavity of the slip cover (20) and is limited by a shoulder. The slip cover (20) is provided with a slip groove, and the slip (21) is mounted in the slip groove. The spring (22) is installed between the slip cover (20) and the slip (21), the upper part of the lower cone (23) is installed in the lower inner cavity of the slip cover (20), the shoulder is limited, the slip (21) is limited between the upper cone (19) and the lower cone (23), the claw spring (11) and the lower cone (23) are threadedly connected; the outer channel (25) and the lower cone (23) are threadedly connected, and the sealing rubber sleeve (28) and the limiting sleeve (27) are installed in the upper inner cavity of the outer channel (25); The anti-rotation sleeve (26) and the outer channel (25) are threadedly connected, and the sealing rubber sleeve (28) and the limiting sleeve (27) are limited by the anti-rotation sleeve (26) and the outer channel (25); A filling channel is provided in the middle part of the outer channel (25), an axial liquid hole is provided on the inner wall of the outer channel (25), the axial liquid hole and the filling channel do not interfere with each other, and a sealing rubber sleeve (39) is installed in the lower inner cavity of the outer channel (25); The lock spring seat (29) and the outer channel (25) are threadedly connected, the sealing rubber sleeve three (39) is limited by the lock spring seat (29) and the outer channel (25), the lock spring seat (29) is provided with an annular groove at the bottom, the small lock spring (30) is installed in the annular groove, the outer channel (25) and the lower joint (32) are threadedly connected, the lower inner wall of the lower joint (32) is provided with an annular groove, and the retaining ring (34) is installed in the annular groove; The upper joint (1) and the drag reduction limit sleeve (2) are threadedly connected, an annular groove is provided on the upper outer wall of the hanging sleeve (3), a small steel ball (38) is installed in the annular groove, an upper shoulder of the hanging sleeve (3) is installed between a lower shoulder of the upper joint (1) and an upper shoulder of the drag reduction limit sleeve (2), the hanging sleeve (3) is limited by the upper inner cavity shoulder of the drag reduction limit sleeve (2) and the inner shoulder of the claw spring (11), a setting seal liquid inlet hole is provided in the middle part of the hanging sleeve (3), an axial liquid passage is provided on the outer wall of the middle part of the hanging sleeve (3), and the axial liquid passage and the setting seal liquid inlet hole do not interfere with each other; The hanging sleeve (3) and the inner channel (24) are threadedly connected, a threaded hole is provided at the lower portion of the hanging sleeve (3), the inner closing sleeve (35) and the hanging sleeve (3) are connected by shear pins, the inner shear sleeve (37) is installed in the inner hole of the upper end portion of the inner closing sleeve (35), and the inner shear sleeve (37) and the inner closing sleeve (35) are connected by shear pins; The inner hole at the upper end of the inner shear sleeve (37) is provided with locking teeth, and the upper outer wall of the inner closing sliding sleeve (35) is provided with a second sealing rubber sleeve (36); The inner channel (24) and the anti-rotation sleeve (26) are connected by a sliding key, a filling channel is provided at the upper part of the inner channel (24), a limit shoulder is provided at the inner hole at the middle lower part of the inner channel (24), a liquid passing hole is provided at the lower part of the inner channel (24), and a liquid passing groove is provided at the lower part of the inner channel (24); The closing sleeve (31) is mounted on the outer wall of the middle part of the inner channel (24); a threaded hole is provided at the lower part of the closing sleeve (31); the closing sleeve (31) and the inner channel (24) are connected by a shear pin; a locking thread is provided at the lower part of the closing sleeve (31); an inner hole at the upper part of the sealing inspection piston (33) contacts and limits the lower end of the closing sleeve (31); a threaded hole is provided at the lower part of the sealing inspection piston (33); and the sealing inspection piston (33) and the inner channel (24) are fixedly connected by a shear pin; A sealing rubber sleeve 4 (40) is provided on the lower outer wall of the plug body (41).

2. The high pressure filling tool assembly according to claim 1, characterized in that: The lower outer wall of the upper joint is provided with a thread, the upper end and the upper inner wall of the unsealing sleeve are provided with a thread, the upper outer wall of the locking sleeve is provided with a thread, and the unsealing sleeve is threadedly connected to the upper joint and the locking sleeve; a threaded hole is provided on the upper part of the locking sleeve, and a liquid hole is provided in the middle part of the locking sleeve; a keyway is provided on the upper part of the locking sleeve, a keyway is provided on the outer wall of the middle part of the unsealing sleeve, the upper sliding key is installed in the keyway, the lower inner wall of the pressing sleeve is provided with a thread, the upper outer wall of the locking sleeve is provided with a thread, and the upper sliding key is fixed in the keyway by the pressing sleeve; a keyway is provided on the lower part of the locking sleeve, a keyway is provided on the upper outer wall of the claw spring, and the lower sliding key is installed in the keyway.

3. The high pressure filling tool assembly according to claim 1, characterized in that: The lower outer wall of the hanging sleeve (3) is provided with a thread, the upper inner wall of the inner channel (24) is provided with a thread, the hanging sleeve (3) and the inner channel (24) are threadedly connected, the lower part of the hanging sleeve (3) is provided with a threaded hole, the inner closing sleeve (35) and the hanging sleeve (3) are connected by a shear pin, the inner shear sleeve (37) is installed in the inner hole of the upper end of the inner closing sleeve (35), the inner shear sleeve (37) and the inner closing sleeve (35) are connected by a shear pin, the upper inner hole of the inner shear sleeve (37) is provided with locking teeth, and the upper outer wall of the inner closing sleeve (35) is provided with a sealing rubber sleeve (36); the upper part of the inner channel (24) is provided with a filling channel, the inner hole at the middle lower part of the inner channel (24) is provided with a limit shoulder, the lower part of the inner channel (24) is provided with a liquid hole, and the lower part of the inner channel (24) is provided with a liquid groove.

4. The high pressure filling tool assembly according to claim 3, characterized in that: The lower outer wall of the lower cone (23) is provided with threads, and the upper inner wall of the outer channel (25) is provided with threads; the lower inner wall of the outer channel (25) is provided with threads, and the upper outer wall of the lower joint (32) is provided with threads.

5. The high pressure filling tool assembly according to claim 3, characterized in that: A key block structure is provided at the upper portion of the inner channel (24), a key slot structure is provided at the inner wall of the anti-rotation sleeve (26), and the key block is inserted into the key slot; thus, the inner channel (24) and the anti-rotation sleeve (26) are connected by a sliding key.

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