CN113047809B

CN113047809B - Fishable bridge plug

Info

Publication number: CN113047809B
Application number: CN202110610492.6A
Authority: CN
Inventors: 刘泉亭; 盛江飞; 张磊晶
Original assignee: Dongying Hongyuan Logging Tool Accessories Co ltd
Current assignee: Dongying Hongyuan logging tool accessories Co.,Ltd.
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2021-11-05
Anticipated expiration: 2041-06-02
Also published as: CN113047809A

Abstract

The invention provides a salvaging type bridge plug, which relates to the technical field of petroleum exploration equipment and comprises a guide head, wherein the interior of the guide head is fixedly connected with a main pipe, the right part of the outer side wall of the main pipe is transversely and slidably connected with a first main pressure ring, the right part of the outer side wall of the main pipe is transversely and slidably connected with a first slip fixing ring, the outer side wall of the first slip fixing ring is uniformly and fixedly connected with a plurality of groups of first part of clamping tiles, the right part of the outer side wall of the main pipe is transversely and slidably connected with a first conical auxiliary ring, the first conical auxiliary ring fixed by a T-shaped structure consisting of the other part of second limiting columns and second sliding rods and slidably connected with the interior of a T-shaped groove is driven to slide upwards, the cone of the first slip fixing ring is loosened from contact with slip sheets of the first slip fixing ring, the slip sheets of the first slip fixing ring are also loosened from contact with the inner wall of an oil pipe, and the salvaging can be finished by utilizing ground extraction equipment to withdraw the bridge plug, the automatic setting relief fishing performance of the bridge plug is realized, and the bridge plug is worthy of great popularization.

Description

Fishable bridge plug

Technical Field

The invention relates to the technical field of bridge plugs, in particular to a fishable bridge plug.

Background

The permanent bridge plug is formed in the early stage of 80 years, and because the permanent bridge plug has few construction procedures, short period and accurate blocking position, the permanent bridge plug is widely applied to the aspect of oil and gas well sealing layer as soon as coming out, basically replaces the prior process technology of cement plug sealing layer, becomes a main sealing layer process for plugging a tested layer of a test well and returning test oil. In order to facilitate subsequent oil testing and seal waste layers, special layers such as dry layers, water layers, gas layers, abnormal high pressure and the like in middle and shallow oil testing construction are generally sealed by the bridge plug, and meanwhile, a permanent bridge plug is also adopted for a part of oil testing end wells without development plans in a short period. In addition, the bridge plug is also used for plugging a tested layer of a deep gas well, and guarantees are provided for successful implementation of process technologies such as upward return testing, fracturing modification and the like.

After the permanent bridge plug is used, the bridge plug is usually unsealed by directly damaging the bridge plug, the bridge plug cannot be salvaged by equipment for recycling, and after the bridge plug is put down and fixed, the steel ball is put down by the recycling equipment for plugging in the bridge plug, so that extra working time and working procedures are increased.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a fishable bridge plug, which solves the problems that the fishing can not be unpacked and the steel ball lowering process is increased.

In order to achieve the purpose, the invention is realized by the following technical scheme: a salvaging type bridge plug comprises a guide head, wherein the guide head is fixedly connected with a main pipe, the right part of the outer side wall of the main pipe is transversely and slidably connected with a first main press ring, the right part of the outer side wall of the main pipe is transversely and slidably connected with a first slip fixing ring, the outer side wall of the first slip fixing ring is uniformly and fixedly connected with a plurality of groups of first part clamping pieces, the right part of the outer side wall of the main pipe is transversely and slidably connected with a first conical auxiliary ring, the left side of the first conical auxiliary ring is uniformly and fixedly connected with a plurality of groups of first part first sliding rods, the left side end of the first sliding rods of the first part is uniformly and fixedly connected with a first limiting column of the first part, the right part of the outer side wall of the main pipe is transversely and slidably connected with a first auxiliary press ring, the right side of the inner part of the first auxiliary press ring is uniformly provided with a plurality of first part second sliding holes, the inner part of the first auxiliary press ring is uniformly provided with a plurality of second limiting grooves of the plurality of groups of the first part, the first sliding rod is respectively and transversely connected with second sliding holes of a group of first parts in a sliding manner, the first limiting columns are respectively and transversely connected with second limiting grooves of a group of first parts in a sliding manner, the left side of the first auxiliary pressing ring is fixedly connected with an auxiliary rubber ring, the left side of the auxiliary rubber ring is fixedly connected with a main rubber ring, the left side of the main rubber ring is fixedly connected with another group of auxiliary rubber rings, the left side of the auxiliary rubber ring is fixedly connected with a second auxiliary pressing ring, the left side of the second auxiliary pressing ring is uniformly provided with a plurality of groups of second sliding holes of second parts, the left side of the outer side wall of the main pipe is transversely connected with a second conical auxiliary ring in a sliding manner, the right side of the second conical auxiliary ring is uniformly and fixedly connected with a plurality of groups of second sliding rods of second parts, the right side ends of the second sliding rods are respectively and fixedly connected with second limiting columns of the second parts, and the second sliding rods are respectively and transversely connected with second sliding holes of the second parts, the second part the spacing post of second is a set of second spacing groove of lateral sliding connection second part respectively, second toper auxiliary ring left side portion evenly is provided with the first sliding hole of multiunit, second toper auxiliary ring inside evenly is provided with the first spacing groove of multiunit, be responsible for the solid fixed ring of left part lateral sliding connection second slips in the lateral wall, the card tile piece of the equal fixed connection multiunit second part of second slips fixed ring lateral wall, be responsible for lateral wall left part lateral sliding connection second owner clamping ring, the even fixed connection multiunit first slide bar in second owner clamping ring right side, the equal fixedly connected with first spacing post of first slide bar right side end, whole first slide bar is a set of first sliding hole of lateral sliding connection respectively, whole a set of first spacing groove of lateral sliding connection respectively of first spacing post.

Preferably, a connecting through hole is formed in the guide head, and the connecting through hole transversely penetrates through the guide head.

Preferably, the first part of the second sliding holes penetrate through the right side wall of the first secondary compression ring and extend into the second limiting groove of the first part, the left side of the inside of the main pipe is fixedly connected with the blocking ring, the left side of the blocking ring is fixedly connected with the limiting cylinder, the limiting cylinder and the inside of the blocking ring are transversely connected with the blocking ball in a sliding mode, and the left side of the main pipe is fixedly connected with the retaining ring.

Preferably, the main pipe transversely penetrates through the main rubber ring and the two sets of auxiliary rubber rings, and the main pipe transversely and slidably connects the main rubber ring and the two sets of auxiliary rubber rings.

Preferably, the second sliding holes transversely penetrate through the left side wall of the second secondary compression ring and extend to the second limiting grooves of the second part.

Preferably, a group of positioning holes are formed in the clamping tiles of the second part, all the positioning holes transversely penetrate through the group of clamping tiles of the second part respectively, and all the first sliding rods are transversely connected with the group of positioning holes of the second part in a sliding manner respectively.

Preferably, the left side of the second main pressure ring is fixedly connected with the sealing ring.

The working principle is as follows: when the bridge plug is lowered to a specific position of an oil pipe, an external hydraulic device is utilized to push a second main pressing ring, after the second main pressing ring is pushed, a second slip fixing ring is pushed to slide downwards on a main pipe, a second conical auxiliary ring on the main pipe is pushed to slide downwards, a clamping tile on the second slip fixing ring extends outwards under the action of a conical body of the second conical auxiliary ring and is tightly contacted with the inner wall of the oil pipe, the second conical auxiliary ring is pushed downwards by the second slip fixing ring and pushes a second auxiliary pressing ring below to slide downwards, the second auxiliary pressing ring pushes an auxiliary rubber ring and a main rubber ring downwards and moves downwards, a first auxiliary pressing ring is pushed to slide downwards, the first auxiliary pressing ring pushes the first conical auxiliary ring downwards and the first conical auxiliary ring downwards, and the clamping tile on the fixed first slip fixing ring is deformed outwards by the conical body, when the first conical auxiliary ring can not descend continuously, the generated reaction force causes the auxiliary rubber ring and the main rubber ring to deform and expand outwards and to contact with the oil pipe tightly, so that the bridge plug is stabilized at a lower position, and when the seat seal needs to be removed, the second main pressing ring is pulled upwards by using external hydraulic equipment, the second main pressing ring utilizes a T-shaped structure formed by a first sliding rod and a first limiting column to ensure that a second conical auxiliary ring additionally provided with a T-shaped groove structure formed by a first limiting groove and a first sliding hole is pulled upwards, at the moment, the conical body of the second conical auxiliary ring is released from contacting with the clamping tile of a second slip fixing ring, so that the slip piece is released from contacting with the inner wall of the oil pipe, the second conical auxiliary ring further utilizes a T-shaped pull rod structure formed by a second sliding rod and a second limiting column additionally provided by the second conical auxiliary ring, and the second auxiliary pressing ring additionally provided with a T-shaped groove structure formed by a second limiting groove and a second sliding hole is pulled upwards The slip, the secondary rubber ring that the rebound of second secondary clamping ring made its below fixed slips with main rubber ring upwards, the fixed first secondary clamping ring in three group's rubber ring below is also upwards driven, first secondary clamping ring utilizes the T type groove structure of installing equally by another part second spacing groove and second sliding hole constitution, the T type pull rod structure that drives the inside sliding connection of T type groove and comprises another part second spacing post and second sliding rod uplift upwards, make its fixed first toper auxiliary ring upwards slide, the upwards slip of first toper auxiliary ring, make its centrum and the solid fixed ring's of first slips piece loose the contact, make the solid fixed ring's of first slips piece also loosen the contact with the oil pipe inner wall, utilize ground extraction equipment to take back the bridging plug and can accomplish to drag for.

The invention provides a fishable bridge plug. The method has the following beneficial effects:

1. the invention uses the external hydraulic equipment to pull the second main press ring upwards, the second main press ring uses the T-shaped structure composed of the first slide bar and the first limit post to pull the second conical auxiliary ring which is provided with the T-shaped groove composed of the first limit groove and the first slide hole upwards, at this time, the cone of the second conical auxiliary ring removes the contact with the clamping tile of the second slip fixing ring, the slip sheet loosens the contact with the inner wall of the oil pipe, the second conical auxiliary ring uses the T-shaped structure composed of the second slide bar and the second limit post which are additionally provided, the second auxiliary ring pulls the T-shaped groove composed of the second limit groove and the second slide hole to slide upwards, the upward movement of the second auxiliary press ring makes the auxiliary rubber ring and the main rubber ring which are fixed at the lower part of the second auxiliary press ring slide upwards, the first auxiliary press ring which is fixed at the lower part of the three rubber rings is also driven upwards, the first auxiliary press ring uses the T-shaped groove composed of the other part of the second limit groove and the second slide hole, the first conical auxiliary ring which is connected with the inside of the T-shaped groove in a sliding mode and is fixed by the T-shaped structure formed by the second limiting column and the second sliding rod in the other part slides upwards, the first conical auxiliary ring slides upwards, the cone body of the first conical auxiliary ring is in loose contact with the slip sheet of the first slip fixing ring, the slip sheet of the first slip fixing ring is also in loose contact with the inner wall of the oil pipe, the bridge plug can be pulled back by utilizing ground extraction equipment, so that the fishing back can be completed, and the automatic removing, setting and fishing performance of the bridge plug is realized.

2. According to the invention, the stopping ring and the limiting cylinder are additionally arranged in the main pipe, and the additionally arranged stopping ball slides by utilizing the limiting sliding cavity formed by the limiting cylinder and the stopping ring, so that the later process of additionally arranging a steel ball below is omitted.

Drawings

FIG. 1 is an isometric illustration of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic view of the main tube of the present invention in partial cross-section;

FIG. 4 is an isometric illustration of a second primary pressure ring of the present invention;

FIG. 5 is a schematic cross-sectional structural view of a second conical auxiliary ring portion of the present invention;

FIG. 6 is a schematic cross-sectional structural view of a tapered auxiliary ring portion of the present invention;

fig. 7 is a schematic cross-sectional view of the structure of the secondary compression ring portion of the present invention.

Wherein, 1, a guide head; 2. a main pipe; 3. a first primary compression ring; 4. a first slip retaining ring; 5. a first conical auxiliary ring; 6. a first sub-compression ring; 7. a second slip retaining ring; 8. a retaining ring; 9. a second main pressure ring; 10. a second conical auxiliary ring; 11. a second secondary compression ring; 12. a main rubber ring; 13. a secondary rubber ring; 14. a connecting through hole; 15. a limiting cylinder; 16. a blocking ball; 17. a barrier ring; 18. a first slide bar; 19. a seal ring; 20. a first limit post; 21. a second slide bar; 22. a second limit post; 23. a first limit groove; 24. a first slide hole; 25. positioning holes; 26. a card tile; 27. a second limit groove; 28. a second slide hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only one set of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1-6, an embodiment of the present invention provides a fishable bridge plug, which includes a guide head 1, the guide head 1 is fixedly connected to a main pipe 2, a right portion of an outer side wall of the main pipe 2 is connected to a first main compression ring 3 in a transverse sliding manner, a right portion of an outer side wall of the main pipe 2 is connected to a first slip fixing ring 4 in a transverse sliding manner, an outer side wall of the first slip fixing ring 4 is uniformly and fixedly connected to a plurality of sets of slip sheets 26 of a first portion, a right portion of an outer side wall of the main pipe 2 is connected to a first conical auxiliary ring 5 in a transverse sliding manner, a left side of the first conical auxiliary ring 5 is uniformly and fixedly connected to a plurality of sets of first sliding rods 18 of the first portion, a left side end of each first sliding rod 18 of the first portion is fixedly connected to a first position limiting column 20 of the first portion, a right portion of an outer side of the main pipe 2 is connected to a first auxiliary compression ring 6 in a transverse sliding manner, a plurality of second sliding holes 28 of sets of the first auxiliary compression ring 6 are uniformly arranged on the right side of the first auxiliary compression ring, a plurality of groups of second limiting grooves 27 of the first part are uniformly arranged in the first auxiliary pressing ring 6, the first part of the first limiting rods 18 are respectively and transversely slidably connected with a group of second sliding holes 28 of the first part, the first part of the first limiting columns 20 are respectively and transversely slidably connected with a group of second limiting grooves 27 of the first part, the left side of the first auxiliary pressing ring 6 is fixedly connected with an auxiliary rubber ring 13, the left side of the auxiliary rubber ring 13 is fixedly connected with a main rubber ring 12, the left side of the main rubber ring 12 is fixedly connected with another group of auxiliary rubber ring 13, the left side of the auxiliary rubber ring 13 is fixedly connected with a second auxiliary pressing ring 11, the left side of the second auxiliary pressing ring 11 is uniformly provided with a plurality of groups of second sliding holes 28 of the second part, the left side of the outer side wall of the main pipe 2 is transversely and slidably connected with a second conical auxiliary ring 10, the right side of the second conical auxiliary ring 10 is uniformly and fixedly connected with a plurality of second sliding rods 21 of the second part, the right side end of the second sliding rod 21 of the second part is fixedly connected with a second limiting post 22 of the second part, the second sliding rod 21 of the second part is respectively in transverse sliding connection with a second part second sliding hole 28, the second limiting post 22 of the second part is respectively in transverse sliding connection with a group of second limiting grooves 27 of the second part, the left side of the second conical auxiliary ring 10 is uniformly provided with a plurality of groups of first sliding holes 24, the inside of the second conical auxiliary ring 10 is uniformly provided with a plurality of groups of first limiting grooves 23, the left side of the left second conical auxiliary ring 10 in the main pipe 2 is transversely in sliding connection with a second slip fixing ring 7, the side wall of the second slip fixing ring 7 is fixedly connected with a plurality of groups of slip sheets 26 of the second part, the left side of the outer side wall of the main pipe 2 is transversely in sliding connection with a second main pressing ring 9, the right side of the second main pressing ring 9 is uniformly and fixedly connected with a plurality of groups of first sliding rods 18, the right side end of the first sliding rod 18 is fixedly connected with a first limiting column 20, all the first sliding rods 18 are respectively and transversely and slidably connected with a group of first sliding holes 24, all the first limiting columns 20 are respectively and transversely and slidably connected with a group of first limiting grooves 23, when the bridge plug is lowered to a specific position of an oil pipe, an external hydraulic device is utilized to push the second main pressing ring 9, after the second main pressing ring 9 is pushed, the second slip fixing ring 7 slides downwards on the main pipe 2, then the second conical auxiliary ring 10 on the main pipe 2 is pushed to slide downwards, the clamping pieces 26 on the second slip fixing ring 7 extend outwards under the action of the conical body of the second conical auxiliary ring 10, the second conical auxiliary ring 10 is tightly contacted with the inner wall of the oil pipe, and then the second auxiliary pressing ring 11 below is pushed to slide downwards, the second auxiliary pressing ring 11 pushes the auxiliary rubber ring 13 and the main rubber ring 12 downwards to move, the auxiliary rubber ring 13 slides downwards, the first auxiliary pressing ring 6 is pushed to slide downwards, the first auxiliary pressing ring 6 pushes the first conical auxiliary ring 5 to slide downwards, the first conical auxiliary ring 5 slides downwards, a clamping tile 26 on the fixed first slip fixing ring 4 is deformed outwards by using a conical body of the first auxiliary pressing ring and is in close contact with the inner wall of an oil pipe, when the first conical auxiliary ring 5 cannot descend continuously, the generated reaction force enables the auxiliary rubber ring 13 and the main rubber ring 12 to deform and expand outwards and to be in close contact with the oil pipe, so that a bridge plug is stabilized at a lower position, when seat sealing needs to be removed, an external hydraulic device is used for pulling the second main pressing ring 9 upwards, the second main pressing ring 9 utilizes a T-shaped structure consisting of a first sliding rod 18 and a first limiting column 20, and a T-shaped auxiliary ring structure consisting of a first limiting groove 23 and a first sliding hole 24 is additionally arranged The pipe joint sealing device is characterized in that 10 is pulled upwards, at the moment, the conical body of the second conical auxiliary ring 10 releases the contact with the slip sheet 26 of the second slip fixing ring 7, so that the slip sheet 26 loosens the contact with the inner wall of an oil pipe, the second conical auxiliary ring 10 utilizes a T-shaped pull rod structure consisting of a second sliding rod 21 and a second limiting column 22 additionally arranged on the conical body, a second auxiliary press ring 11 additionally provided with a T-shaped groove structure consisting of a second limiting groove 27 and a second sliding hole 28 is pulled to slide upwards, the second auxiliary press ring 11 moves upwards to enable an auxiliary glue ring 13 and a main glue ring 12 fixed below the second auxiliary press ring to slide upwards, a first auxiliary press ring 6 fixed below three groups of glue rings is also driven upwards, the first auxiliary press ring 6 utilizes a T-shaped groove structure consisting of the other part of the second limiting groove 27 and the second sliding hole 28 to drive the T-shaped pull rod structure consisting of the other part of the second limiting column 22 and the second sliding rod 21 and connected in a sliding mode in the T-shaped groove to lift upwards, make its fixed first toper auxiliary ring 5 upwards slide, the upwards slide of first toper auxiliary ring 5 makes its centrum and the solid fixed ring 4's of first slips slip piece 26 loosen the contact, makes the solid fixed ring 4's of first slips slip piece 26 also loosen the contact with the oil pipe inner wall, utilizes ground extraction equipment to withdraw the bridging plug and can accomplish and retrieve.

The guide head 1 is internally provided with a connecting through hole 14, the connecting through hole 14 transversely penetrates through the guide head 1, the additionally arranged guide head 1 is used for preventing a bottom opening of a sleeve from being scratched or inserted into a well wall, and the guide sleeve smoothly goes down to the bottom of the well.

The first part second sliding holes 28 penetrate through the right side wall of the first secondary compression ring 6 and extend into the first part second limiting groove 27, the blocking ring 17 is fixedly connected to the left side inside the main pipe 2, the limiting cylinder 15 is fixedly connected to the left side of the blocking ring 17, the blocking balls 16 are transversely and slidably connected to the limiting cylinder 15 and the blocking ring 17, and the retaining ring 8 is fixedly connected to the left side of the main pipe 2.

The main pipe 2 transversely penetrates through the main rubber ring 12 and the two groups of auxiliary rubber rings 13, and the main pipe 2 is transversely connected with the main rubber ring 12 and the two groups of auxiliary rubber rings 13 in a sliding manner.

The second-part second sliding holes 28 transversely penetrate through the left side wall of the second sub-pressing ring 11 and extend to the second-part second limiting groove 27.

A set of positioning holes 25 is formed in each of the second set of clamping plates 26, all the positioning holes 25 transversely penetrate through the second set of clamping plates 26, and all the first sliding rods 18 are transversely slidably connected with the second set of positioning holes 25.

And a sealing ring 19 is fixedly connected to the left side of the second main pressing ring 9 to increase the seating property of the bridge plug.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A can drag for formula bridging plug, includes guide head (1), its characterized in that: the guiding head (1) is fixedly connected with a main pipe (2) internally, the main pipe (2) is connected with a first main press ring (3) through a right transverse sliding manner, the main pipe (2) is connected with a first slip fixing ring (4) through a right transverse sliding manner, the first slip fixing ring (4) is fixedly connected with a plurality of groups of first part clamping pieces (26) through a lateral wall uniformly, the main pipe (2) is connected with a first conical auxiliary ring (5) through a right transverse sliding manner, the left side of the first conical auxiliary ring (5) is fixedly connected with a plurality of groups of first part first sliding rods (18), the left side of the first sliding rods (18) of the first part is fixedly connected with a first limiting column (20) of the first part, the main pipe (2) is connected with a right transverse sliding manner through a first auxiliary press ring (6), and a plurality of groups of second sliding holes (28) of the first part are uniformly arranged on the right side of the inside of the first auxiliary press ring (6), a plurality of groups of second limiting grooves (27) of the first part are uniformly arranged in the first secondary pressing ring (6), the first sliding rod (18) of the first part is respectively transversely slidably connected with a group of second sliding holes (28) of the first part, the first limiting column (20) of the first part is respectively transversely slidably connected with a group of second limiting grooves (27) of the first part, the left side of the first secondary pressing ring (6) is fixedly connected with a secondary rubber ring (13), the left side of the secondary rubber ring (13) is fixedly connected with a main rubber ring (12), the left side of the main rubber ring (12) is fixedly connected with another group of secondary rubber ring (13), the left side of the secondary rubber ring (13) is fixedly connected with a second secondary pressing ring (11), a plurality of groups of second sliding holes (28) of the second part are uniformly arranged at the left side part of the second secondary pressing ring (11), and the left part of the outer side wall of the main pipe (2) is transversely slidably connected with a second tapered auxiliary ring (10), the right side of the second conical auxiliary ring (10) is uniformly and fixedly connected with a plurality of groups of second sliding rods (21) of a second part, the right side end of the second sliding rod (21) of the second part is fixedly connected with a second limiting column (22) of the second part, the second sliding rods (21) of the second part are respectively and transversely slidably connected with second part second sliding holes (28), the second limiting columns (22) are respectively and transversely slidably connected with a plurality of second limiting grooves (27) of the second part, the left side part of the second conical auxiliary ring (10) is uniformly provided with a plurality of groups of first sliding holes (24), a plurality of groups of first limiting grooves (23) are uniformly arranged in the second conical auxiliary ring (10), the left part of the outer side wall of the main pipe (2) is transversely and slidably connected with a second fixing ring (7), the side wall of the second slip fixing ring (7) is fixedly connected with a plurality of groups of second part clamping tiles (26), be responsible for (2) lateral wall left part lateral sliding connection second owner clamping ring (9), the even fixed connection multiunit first slide bar (18) in second owner clamping ring (9) right side, first slide bar (18) right side end first spacing post (20) of the equal fixedly connected with, whole first slide bar (18) lateral sliding connection a set of first sliding hole (24), whole respectively first spacing post (20) a set of first spacing groove (23) of lateral sliding connection respectively.

2. A bailable bridge plug as claimed in claim 1, wherein: the guide head is characterized in that a connecting through hole (14) is formed in the guide head (1), and the connecting through hole (14) transversely penetrates through the guide head (1).

3. A bailable bridge plug as claimed in claim 1, wherein: the first part second slip hole (28) all run through first secondary clamping ring (6) right side wall and extend to in first part second spacing groove (27), be responsible for (2) inside left fixed connection and block ring (17), block ring (17) left side fixed connection spacing section of thick bamboo (15), spacing section of thick bamboo (15) and the inside transverse sliding connection of block ring (17) block ball (16), be responsible for (2) left side fixed connection buckle (8).

4. A bailable bridge plug as claimed in claim 1, wherein: the main pipe (2) transversely penetrates through the main rubber ring (12) and the two sets of auxiliary rubber rings (13), and the main pipe (2) is transversely connected with the main rubber ring (12) and the two sets of auxiliary rubber rings (13) in a sliding mode.

5. A bailable bridge plug as claimed in claim 1, wherein: and in the second part, the second sliding holes (28) transversely penetrate through the left side wall of the second secondary pressing ring (11) and extend to the second part of the second limiting groove (27).

6. A bailable bridge plug as claimed in claim 1, wherein: a group of positioning holes (25) are formed in the clamping tiles (26) of the second part, all the positioning holes (25) penetrate through the group of clamping tiles (26) of the second part respectively in the transverse direction, and all the first sliding rods (18) are connected with the group of positioning holes (25) of the second part respectively in the transverse sliding mode.

7. A bailable bridge plug as claimed in claim 1, wherein: and the left side of the second main pressure ring (9) is fixedly connected with a sealing ring (19).