CN114607316B

CN114607316B - Recyclable bridge plug

Info

Publication number: CN114607316B
Application number: CN202210425920.2A
Authority: CN
Inventors: 祝效华; 彭扬; 敬俊; 罗义尧; 罗希锐
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2023-05-12
Anticipated expiration: 2042-04-21
Also published as: CN114607316A

Abstract

The invention belongs to a workover tool, and particularly relates to a recyclable bridge plug. The recyclable bridge plug mainly comprises fork rod, safety pin, small shear pin, spring pin bottom plate, shear pin, spring pin, large ratchet, ratchet release frame, large shear pin, rubber sealing element, slips and other parts. Grasping a fork rod bearing neck to put in a bridge plug; when the bridge plug reaches the working position, the bridge plug is seated, the fork rod bearing neck is pulled, the spring pin bottom plate is pressed, the safety pin is sheared firstly to block an internal oil way of the bridge plug, and then the shearing pin is sheared to enable the large ratchet wheel to radially extrude the rubber sealing element and the slips of the bridge plug, and the large ratchet wheel is tightly attached to the pipe wall to block upper and lower layers of oil liquid of the oil pipe; when the bridge plug is recovered, the fork rod bearing neck is pressed, the spring pin is pulled, the small shear pin is sheared firstly to open an oil way in the bridge plug, then the large shear pin is sheared, the ratchet release frame is pushed up by the ratchet, the rubber sealing element slowly rebounds, the slips release the wall of the oil pipe, the bridge plug is unsealed, and the bridge plug is recovered in an upward lifting mode. The invention has simple operation, safety, reliability and strong applicability.

Description

Recyclable bridge plug

Technical Field

The invention relates to a production pipe column plugging operation tool for petroleum well repair operation, in particular to a recyclable bridge plug, and belongs to the field of well repair operation tools.

Background

Bridge plugs are widely used in oilfield development and exploitation processes as a commonly used downhole plugging tool. The bridge plug has a sealing function, and effective support is provided for the implementation of underground processes such as acidification, fracturing and the like and the smooth production of an oil and gas well. The method is widely applied to construction processes such as separate-layer water injection, underground operation, mechanical oil extraction, acid fracturing, shale gas development and the like. However, the existing permanent bridge plugs, soluble bridge plugs and the like have a plurality of problems, such as high cost, low general applicability and the like, and greatly increase the oil extraction cost. Aiming at the problems, a recyclable bridge plug is developed, so that the work requirement can be well met, and the bridge plug can be recycled repeatedly, thereby achieving the purpose of reducing the cost. In addition, the bridge plug can be suitable for various working conditions, has high universal applicability and increases oil extraction efficiency. Therefore, the invention of the recyclable bridge plug has important significance for realizing the oil and gas exploitation by utilizing the recyclable bridge plug.

Disclosure of Invention

The invention aims to solve the problems and provide a novel recyclable bridge plug with good setting effect, simple recovery and reasonable structure.

The technical scheme adopted by the invention is as follows:

a recoverable bridge plug comprises fork rod, coupling, ratchet cap, sand cover, C shape ring casing, C shape ring, little ratchet, safety pin, ratchet fixer, little shear pin, port sleeve, main dabber, sealing ring, spring pin bottom plate, spring pin set screw, spring pin, spring, shear pin, ratchet shell, big ratchet, C shape spring, ratchet release support, dabber, big shear pin, go up manometer ring, rubber seal element, isolation element, lower manometer ring, dabber lid, threaded sleeve, slips, lower cone, piston sleeve, elasticity O type sealing washer, bypass piston, its characterized in that: the fork rod is provided with an external thread, a ratchet, a through hole and a bearing neck, the external thread at the upper end of the fork rod is connected with the fork rod and the coupling, the ratchet at the upper end of the fork rod is meshed with the ratchet of the small ratchet, the external thread at the middle part of the fork rod is screwed with the internal thread of the port sleeve, the through hole at the upper end of the fork rod is communicated with oil inside the piston sleeve and the core shaft through hole at the lower end of the fork rod, the external thread at the lower end of the fork rod is screwed with the internal thread of the bypass piston, and the bearing neck is matched with a throwing and recycling tool. The C-ring housing is mounted between the shroud and the main mandrel. The C-ring is mounted to the end of the ratchet holder at the shoulder of the ratchet cap. The small ratchet is provided with a small ratchet. The ratchet fixer is provided with internal threads and through holes, the ratchet fixer is connected with the ratchet fixer and the ratchet cap through the internal threads, the safety pin is inserted into the middle through hole and the small through hole of the main mandrel, and the through hole at the lower end is used for installing the small shear pin. The port sleeve is provided with an internal thread, a groove and through grooves penetrating through the pipe walls of the two sides, the groove of the port sleeve is used for placing the sealing ring, the through grooves of the port sleeve realize oil circulation, and the deep holes of the port sleeve are used for installing the small shear pins. The main spindle is provided with a deep hole arranged on the opposite side, a small through hole penetrating through the pipe wall on one side, a large through hole penetrating through the pipe walls on the two sides, ratchets, external threads and limiting plates, the large through hole of the main spindle realizes oil circulation, the deep hole of the main spindle and the through hole in the middle of the ratchet shell are used for installing a shear pin, the ratchets of the main spindle are meshed with the ratchets of the large ratchet, the external threads at the upper end of the main spindle are connected with the main spindle and the sand cover, the external threads at the lower end of the main spindle are screwed with the internal threads of the piston sleeve, and the limiting plates limit the screwing depth of the threads. The spring pin bottom plate is fixed at the step inside the ratchet shell and is provided with a bottom plate shallow hole and a bottom plate deep hole. The spring pin fixing screw is arranged in the small through hole of the ratchet shell and the shallow hole of the bottom plate. The spring pin is arranged in the large through hole of the ratchet shell and the deep hole of the bottom plate. The ratchet shell is provided with an inner step, an inner thread, a small through hole, a large through hole and a middle through hole which penetrate through the pipe walls at two sides, and the inner thread of the ratchet shell is screwed with the outer thread of the ratchet release frame. The large ratchet wheel is provided with a groove and a ratchet, and the large ratchet wheel groove is used for installing a C-shaped spring. The ratchet release frame is provided with external threads and through holes penetrating through the pipe walls of the two sides, and the through holes of the ratchet release frame are used for installing the large shear pins. The mandrel is provided with an internal thread, an external thread and a deep hole penetrating through the pipe walls of the two sides, the mandrel is connected with the ratchet release bracket through the internal thread of the mandrel, the external thread at the upper end of the mandrel is connected with the mandrel and the upper pressure gauge ring, the external thread at the lower end of the mandrel is connected with the mandrel cover, and the deep hole of the mandrel is used for installing a large shear pin. The thread sleeve is provided with an external thread and a T-shaped groove, the external thread of the thread sleeve is used for threaded connection of the thread sleeve and the lower pressure gauge ring, and the T-shaped groove of the thread sleeve is matched with the T-shaped frame at the upper end. And T-shaped frames are respectively arranged at two ends of the slips, and the T-shaped frames at the lower ends are matched with the T-shaped grooves of the lower cones. The slip assembly is composed of a threaded sleeve, slips and a lower cone. The piston sleeve is provided with internal threads and 4 through holes are circumferentially arranged, and oil circulation is realized through the through holes of the piston sleeve. The bypass piston is provided with a through hole, an internal thread and 2 annular grooves, the bypass piston through hole realizes oil circulation, and the annular grooves are used for installing elastic O-shaped sealing rings.

Drawings

FIG. 1 is a schematic illustration of a casting configuration of a recyclable bridge plug;

FIG. 2 is a schematic illustration of a setting configuration of a retrievable bridge plug;

FIG. 3 is a schematic illustration of the unsealed state of the recyclable bridge plug;

FIG. 4 is a schematic side plan view of a recyclable bridge plug;

FIG. 5 is a schematic structural view of the yoke;

FIG. 6 is a schematic view of the structure of the small ratchet;

FIG. 7 is a schematic view of the ratchet holder;

FIG. 8 is a schematic structural view of a port sleeve;

FIG. 9 is a schematic structural view of a main core shaft;

FIG. 10 is a schematic structural view of a spring pin base plate;

FIG. 11 is a schematic structural view of the ratchet housing;

FIG. 12 is a schematic view of the construction of a large ratchet;

FIG. 13 is a schematic view of the structure of the ratchet release frame;

FIG. 14 is a schematic structural view of a mandrel;

FIG. 15 is a schematic view of the construction of the slip assembly;

FIG. 16 is a schematic structural view of a piston sleeve;

FIG. 17 is a schematic view of the bypass piston;

in the figure: 1. fork, 1a, fork upper external thread, 1b, fork upper ratchet, 1c, fork middle external thread, 1d, fork upper through hole, 1e, fork lower through hole, 1f, fork lower external thread, 1g, load neck, 2, collar, 3, ratchet cap, 4, sand cover, 5.C ring housing, 6.C ring, 7, small ratchet, 7a, small ratchet, 8, safety pin, 9, ratchet holder, 9a, ratchet holder internal thread, 9b, middle through hole, 9c, lower through hole, 10, small shear pin, 11, port sleeve, 11a, port sleeve internal thread, 11b, port sleeve through hole, 11c, port sleeve groove, 11d, port sleeve deep hole, 12, main spindle, 12a, main spindle small through hole, 12b, main spindle large through hole, 12c, 12d, main spindle ratchet, 12e, main spindle lower external thread, 12f, 12g, main shaft upper end external threads, 13, seal ring, 14, spring pin base plate, 14a, base plate shallow hole, 14b, base plate deep hole, 15, spring pin set screw, 16, spring pin, 17, spring, 18, shear pin, 19, ratchet housing, 19a, ratchet housing small through hole, 19b, ratchet housing internal step, 19c, ratchet housing large through hole, 19d, ratchet housing middle through hole, 19e, ratchet housing internal threads, 20, large ratchet, 20a, large ratchet groove, 20b, large ratchet, 21. C-shaped spring, 22, ratchet release bracket, 23, ratchet release bracket external threads, 23b, ratchet release bracket through hole, 24, mandrel, 24a, mandrel internal threads, 24b, mandrel deep hole, 24c, mandrel upper end external threads, 24d, mandrel lower end external threads, 25, large shear pin, 26, upper pressure gauge ring, 27, rubber seal element, 28, 29. the lower pressure gauge ring 30, the mandrel cap 31, the threaded sleeve 31a, the threaded sleeve external threads 31b, the threaded sleeve T-shaped groove 32, the slips 32a, the upper end T-shaped frame 32b, the lower end T-shaped frame 33, the lower cone 33a, the lower cone T-shaped groove 34, the piston sleeve 34a, the piston sleeve internal threads 34b, the piston sleeve through hole 35, the elastic O-shaped sealing ring 36, the bypass piston 36a, the piston sleeve through hole 36b, the annular groove 36c and the bypass piston internal threads.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1-17, a recyclable bridge plug is composed of a fork 1, a coupling 2, a ratchet cap 3, a sand cover 4, a C-ring housing 5, a C-ring 6, a small ratchet 7, a safety pin 8, a ratchet holder 9, a small shear pin 10, a port sleeve 11, a main mandrel 12, a seal ring 13, a spring pin bottom plate 14, a spring pin set screw 15, a spring pin 16, a spring 17, a shear pin 18, a ratchet housing 19, a large ratchet 20, a C-spring 21, a ratchet release bracket 22, a ratchet release bracket 23, a mandrel 24, a large shear pin 25, an upper pressure gauge ring 26, a rubber seal element 27, a spacer element 28, a lower pressure gauge ring 29, a mandrel cover 30, a threaded sleeve 31, slips 32, a lower cone 33, a piston sleeve 34, an elastic O-ring 35, a bypass piston 36, and is characterized in that: in the initial state, the bypass piston 36 contacts the lower end surface of the interior of the piston sleeve 34, when the recyclable bridge plug is caught by the throwing tool and the fork rod bearing neck 1g is lowered, the well oil flows into the tool inner channel along the piston sleeve through hole 34b, flows out of the main mandrel large through hole 12b through the port sleeve through groove 11b, at the moment, the oil channel is opened, and the tool lowering resistance is reduced. The retractable bridge plug reaches the work designation position and the running tool applies downward pressure to the spring pin base 14 and the upper end of the ratchet housing 19, applying upward tension to the fork-carrying neck 1g. The opposite force acts on the fork rod 1 and the main mandrel 12, the safety pin 8 is sheared, the fork rod 1 carries the port sleeve 11 and the bypass piston 36 to move upwards relative to the whole tool, the port sleeve through groove 11b and the main mandrel big through hole 12b are staggered, the port sleeve groove 11c is provided with the sealing ring 13, and the oil outflow channel is blocked. The bypass piston 36 moves upward to block the piston sleeve through hole 34b, the annular groove 36b is provided with an elastic O-shaped sealing ring 35, an oil inflow channel is blocked, excessive oil in an oil channel enters the bypass piston 36 through the fork rod upper end through hole 1d and the fork rod lower end through hole 1e, and the oil channel is closed after the bypass piston 36 moves to a hollow area generated by the bypass piston 36 and the piston sleeve 34 in the axial direction. The C-shaped ring 6 moves upwards axially, enters a gap area between the upper end of the sand cover 4 and the upper end of the C-shaped ring shell 5 along the chamfering structure of the C-shaped ring shell 5, and the C-shaped ring 6 is clamped at the upper end of the C-shaped ring shell 5. The small ratchet wheel 7 moves upwards axially, and the small ratchet wheel ratchet teeth 7a are meshed with the ratchet teeth 1b at the upper end of the fork rod, so that the small ratchet wheel 7 is allowed to move upwards axially and is prevented from moving downwards axially. The position of the port sleeve 11 is locked and the bypass piston 36 cannot move axially downward to open the oil passage. The yoke 1 and the main spindle 12 are continuously subjected to forces which increase with time and are opposite in direction, and the shear pin 18 is sheared. The large ratchet teeth 20b engage with the main spindle ratchet teeth 12d, allowing the large ratchet 20 to move in the lower axial direction, preventing it from moving in the upper axial direction. The ratchet housing 19 moves axially downward against the large ratchet 20 and the ratchet release bracket 23, and the large ratchet 20, the ratchet release bracket 22, the ratchet release bracket 23, the spindle 24, the upper pressure gauge ring 26, the spindle cover 30 and the threaded sleeve 31 are all moved axially downward due to the tight fit between the components. The upper pressure gauge ring 26, the lower pressure gauge ring 29 and the isolation member 28 press the rubber seal member 27 therebetween to deform it, thereby plugging the oil pipe. Because the piston sleeve 34 and the lower cone 33 do not axially move, the threaded sleeve 31 moves downwards axially, and a special T-shaped frame is designed between the threaded sleeve 31 and the slips 32, and between the slips 32 and the lower cone 33, the slips 32 are radially pushed out by the threaded sleeve 31 and the lower cone 33 along the inclined plane of the T-shaped frame, and the tile teeth touch the oil pipe wall and are blocked. Because the large ratchet 20 is restrained from moving in the upward axial direction, the recyclable bridge plug cannot spontaneously unseal. The setting action of the recyclable bridge plug is completed and the recycling and throwing tool is pulled up.

To retrieve the retrievable bridge plug, the yoke bearing neck 1g is subjected to downward pressure, the spring pin 16 is subjected to upward tension, the small shear pin 10 is sheared, the yoke 1 can axially move downward relative to the whole retrievable bridge plug, the port sleeve through slot 11b is communicated with the main core shaft large through hole 12b, the bypass piston 36 moves downward to contact the lower end surface inside the matched piston sleeve 34, the oil path channel is opened, and the hydraulic pressure inside the tool is balanced. The fork rod bearing neck 1g and the spring pin 16 are continuously subjected to the action force which increases along with time and is opposite in direction, the large shearing pin 25 is sheared, the ratchet release frame 23 moves upwards and axially against the ratchet release frame 22, the ratchet release frame 22 pushes the large ratchet 20 open, the main core shaft ratchet 12d cannot be meshed with the large ratchet 20b, and the setting mechanism is unlocked. The ratchet release support 22 is in threaded connection with the spindle 24, and the spindle 24 moves axially upward, driving the upper pressure gauge ring 26 to move together, and the rubber sealing element 27 rebounds slowly. The threaded sleeve 31 moves axially upward and the slips 32 relax slowly, and the deblocking action is completed. At the moment, the recyclable bridge plug is lifted and recycled by utilizing a recycling tool.

Claims

1. The utility model provides a recoverable bridging plug, by fork arm (1), coupling (2), ratchet cap (3), sand cover (4), C shape ring casing (5), C shape ring (6), little ratchet (7), safety pin (8), ratchet fixer (9), little shear pin (10), port sleeve (11), main mandrel (12), sealing ring (13), spring pin bottom plate (14), spring pin set screw (15), spring pin (16), spring (17), shear pin (18), ratchet shell (19), big ratchet (20), C shape spring (21), ratchet release support (22), ratchet release frame (23), dabber (24), big shear pin (25), go up manometer ring (26), rubber seal element (27), isolation element (28), lower manometer ring (29), dabber lid (30), threaded sleeve (31), slips (32), lower cone (33), piston sleeve (34), elasticity O sealing washer (35), bypass piston (36) are constituteed, its characterized in that: the fork rod (1) is provided with an external thread, a ratchet, a through hole and a bearing neck, the external thread (1 a) at the upper end of the fork rod is used for connecting the fork rod (1) with the coupling (2), the ratchet (1 b) at the upper end of the fork rod is meshed with the ratchet (7 a) of the small ratchet, the external thread (1 c) at the middle part of the fork rod is screwed with the internal thread (11 a) of the port sleeve, the through hole (1 d) at the upper end of the fork rod and the through hole (1 e) at the lower end of the fork rod realize the oil intercommunication between the interior of the piston sleeve (34) and the interior of the mandrel (24), the external thread (1 f) at the lower end of the fork rod is screwed with the internal thread (36 c) of the bypass piston, and the bearing neck (1 g) is matched with a throwing and recovering tool; the C-shaped ring shell (5) is arranged between the sand cover (4) and the main mandrel (12); the C-shaped ring (6) is arranged at the end part of the ratchet fixer (9) and is arranged at the shaft shoulder of the ratchet cap (3); the small ratchet wheel (7) is provided with a small ratchet wheel ratchet (7 a); the ratchet fixer (9) is provided with internal threads and through holes, the internal threads (9 a) of the ratchet fixer are connected with the ratchet fixer (9) and the ratchet cap (3), the safety pin (8) is inserted into the middle through hole (9 b) and the main core shaft small through hole (12 a), and the lower end through hole (9 c) is used for installing the small shear pin (10); the port sleeve (11) is provided with internal threads, deep holes, grooves and through grooves penetrating through the pipe walls at two sides, the port sleeve groove (11 c) is used for placing the sealing ring (13), the port sleeve through groove (11 b) is used for realizing oil circulation, and the port sleeve deep hole (11 d) is used for installing the small shear pin (10); the main mandrel (12) is provided with a deep hole, a small through hole, a large through hole, ratchets, external threads and a limiting plate, wherein the deep holes are arranged on opposite sides, the small through hole penetrates through a pipe wall on one side, the large through hole penetrates through pipe walls on two sides, the large through hole (12 b) of the main mandrel is used for realizing oil circulation, the deep hole (12 c) of the main mandrel and the through hole (19 d) in the middle of a ratchet shell are used for installing a shear pin (18), the ratchet (12 d) of the main mandrel is meshed with the ratchet (20 b) of the large ratchet, the external threads (12 g) on the upper end of the main mandrel are connected with the sand cover (4), the external threads (12 e) on the lower end of the main mandrel are screwed with the internal threads (34 a) of the piston sleeve, and the limiting plate (12 f) limits the screwing depth of the threads; the spring pin bottom plate (14) is fixed at an inner step (19 b) of the ratchet shell and is provided with a bottom plate shallow hole (14 a) and a bottom plate deep hole (14 b); the spring pin fixing screw (15) is arranged in the small through hole (19 a) of the ratchet shell and the shallow hole (14 a) of the bottom plate; the spring pin (16) is arranged in the ratchet shell large through hole (19 c) and the bottom plate deep hole (14 b); the ratchet shell (19) is provided with an inner step, an inner thread, a small through hole penetrating through the pipe walls of the two sides, a large through hole and a middle through hole, and the inner thread (19 e) of the ratchet shell is screwed with the outer thread (23 a) of the ratchet release frame; the large ratchet wheel (20) is provided with a groove and a ratchet, and the large ratchet wheel groove (20 a) is used for installing a C-shaped spring (21); the ratchet release frame (23) is provided with external threads and through holes penetrating through the pipe walls of the two sides, and the ratchet release frame through holes (23 b) are used for installing large shear pins (25); the mandrel (24) is provided with an internal thread, an external thread and a deep hole penetrating through the pipe walls at two sides, the mandrel internal thread (24 a) is connected with the mandrel (24) and the ratchet release bracket (22), the external thread (24 c) at the upper end of the mandrel is connected with the mandrel (24) and the upper pressure gauge ring (26), the external thread (24 d) at the lower end of the mandrel is connected with the mandrel (24) and the mandrel cover (30), and the mandrel deep hole (24 b) is used for installing a large shear pin (25); the threaded sleeve (31) is provided with an external thread and a T-shaped groove, the threaded sleeve external thread (31 a) is connected with the threaded sleeve (31) and the lower pressure gauge ring (29), and the threaded sleeve T-shaped groove (31 b) is matched with the upper end T-shaped frame (32 a); two ends of the slips (32) are respectively provided with a T-shaped frame, and the T-shaped frame (32 b) at the lower end is matched with the T-shaped groove (33 a) of the lower cone; the slip assembly consists of a threaded sleeve (31), a slip (32) and a lower cone (33); the piston sleeve (34) is provided with internal threads, 4 through holes are circumferentially arranged, and the piston sleeve through holes (34 b) realize oil circulation; the bypass piston (36) is provided with a through hole, internal threads and 2 annular grooves, the bypass piston through hole (36 a) is used for realizing oil circulation, and the annular groove (36 b) is used for installing an elastic O-shaped sealing ring (35).

2. A recyclable bridge as defined in claim 1, wherein: in the initial state, the bypass piston (36) contacts the lower end surface of the interior of the piston sleeve (34), when the recyclable bridge plug is caught by a throwing tool and the fork rod bearing neck (1 g) is put down, the oil in the well flows into the tool inner channel along the piston sleeve through hole (34 b), then flows out of the main core shaft through the port sleeve through groove (11 b) and the main core shaft through hole (12 b), at the moment, the oil channel is opened, and the tool lowering resistance is reduced; the recyclable bridge plug reaches a designated working position, and the throwing tool applies downward pressure to the upper ends of the spring pin base plate (14) and the ratchet wheel shell (19) and upward tension to the fork rod bearing neck (1 g); the opposite force acts on the fork rod (1) and the main mandrel (12), the safety pin (8) is sheared, the fork rod (1) moves upwards relative to the bypass piston (36) and the tool, the position of the port sleeve through groove (11 b) is staggered with the position of the main mandrel large through hole (12 b), the port sleeve groove (11 c) is provided with a sealing ring (13), and the oil outflow channel is blocked; the bypass piston (36) moves upwards to block the piston sleeve through hole (34 b) and the annular groove (36 b) is provided with an elastic O-shaped sealing ring (35), an oil inflow channel is blocked, redundant oil in an oil channel enters the bypass piston (36) through a fork rod upper end through hole (1 d) and a fork rod lower end through hole (1 e), and the oil channel is closed after the bypass piston (36) moves to a hollow area generated by the bypass piston (36) and the piston sleeve (34) in the axial direction; the C-shaped ring (6) moves upwards axially, enters a gap area between the upper end of the sand cover (4) and the upper end of the C-shaped ring shell (5) along a chamfer structure of the C-shaped ring shell (5), and the C-shaped ring (6) is clamped at the upper end of the C-shaped ring shell (5); the small ratchet wheel (7) moves upwards axially, the small ratchet wheel ratchet teeth (7 a) are meshed with the ratchet teeth (1 b) at the upper end of the fork rod, the small ratchet wheel (7) is allowed to move upwards axially, and the small ratchet wheel is prevented from moving downwards axially; the position of the port sleeve (11) is locked, and the bypass piston (36) cannot move downwards axially to open the oil path channel; the fork rod (1) and the main core shaft (12) are continuously subjected to the action force which increases along with time and is opposite to the action force, and the shearing pin (18) is sheared; the large ratchet wheel ratchet (20 b) is meshed with the main mandrel ratchet (12 d) to allow the large ratchet wheel (20) to move along the lower axial direction and prevent the large ratchet wheel from moving along the upper axial direction; the ratchet shell (19) props against the large ratchet (20) and moves downwards and axially with the ratchet release frame (23), and the large ratchet (20), the ratchet release frame (22), the ratchet release frame (23), the mandrel (24), the upper pressure gauge ring (26), the mandrel cover (30) and the threaded sleeve (31) are tightly matched, so that the components move downwards and axially; the upper pressure gauge ring (26), the lower pressure gauge ring (29) and the isolation element (28) squeeze the rubber sealing element (27) between the upper pressure gauge ring and the lower pressure gauge ring to deform the rubber sealing element and block the oil pipe; because the piston sleeve (34) and the lower cone (33) do not axially move, the threaded sleeve (31) axially moves downwards, and a special T-shaped frame is designed between the threaded sleeve (31) and the slips (32) and between the slips (32) and the lower cone (33), the slips (32) are radially pushed out by the threaded sleeve (31) and the lower cone (33) along the inclined plane of the T-shaped frame, and the tile teeth touch the wall of the oil pipe and are blocked; since the large ratchet wheel (20) is restrained from moving in the upward axial direction, the recyclable bridge plug cannot spontaneously unseal; the setting action of the recyclable bridge plug is completed, and the recycling and throwing tool is pulled up; when the recyclable bridge plug is recycled, the fork rod bearing neck (1 g) is subjected to downward pressure, the spring pin (16) is subjected to upward tension, the small shearing pin (10) is sheared, the fork rod (1) can axially move downwards relative to the whole recyclable bridge plug, the port sleeve through groove (11 b) is communicated with the main core shaft large through hole (12 b), the bypass piston (36) moves downwards to be in contact with the inner lower end surface of the matched piston sleeve (34), the oil path channel is opened, and the hydraulic pressure in the tool is balanced; the fork rod bearing neck (1 g) and the spring pin (16) are continuously subjected to the action force which increases along with time and is opposite in direction, the large shearing pin (25) is sheared, the ratchet release frame (23) moves upwards and axially to prop against the ratchet release frame (22), the ratchet release frame (22) pushes the large ratchet wheel (20) open, the main core shaft ratchet teeth (12 d) and the large ratchet wheel ratchet teeth (20 b) cannot be meshed, and the setting mechanism is unlocked; the ratchet release bracket (22) is in threaded connection with the mandrel (24), the mandrel (24) moves upwards axially to drive the upper pressure gauge ring (26) to move together, and the rubber sealing element (27) rebounds slowly; the threaded sleeve (31) moves upwards axially, the slips (32) relax slowly, and the deblocking action is completed; at the moment, the recyclable bridge plug is lifted and recycled by utilizing a recycling tool.