Circulating leaking stoppage nipple

Abstract

The utility model discloses a circulation leaking stoppage pup joint which comprises a pup joint pipe and an inner fluid pipe fixedly connected in the pup joint pipe, the two sides of the inner fluid pipe extend out of openings in the two sides of the pup joint pipe respectively, the two sides of the inner fluid pipe are welded and fixed to the pup joint pipe, and servo motors are fixed to the two opposite sides of the pup joint pipe respectively. An inflator pump is further fixed to the position, close to one servo motor, of the outer wall of the short section pipe, an air pipe entering an inner cavity of the short section pipe is fixedly connected to the inflator pump, extending cylinders are welded to the two sides of the inner cavity of the short section pipe correspondingly, and storage grooves are formed in the opposite sides of the two extending cylinders correspondingly; output shafts of the two servo motors are coaxially connected with screws correspondingly, the two screws are sleeved with a first leaking stoppage block and a second leaking stoppage block in a threaded mode correspondingly, and the first leaking stoppage block and the second leaking stoppage block are attached to the inner walls of the two storage grooves correspondingly. According to the circulating leaking stoppage short section, the well leakage phenomenon is completely prevented, and corresponding economic losses are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling plugging, in particular to a circulation plugging nipple. Background Art

[0002] In the downhole drilling operations of oil and natural gas, the safe handling of well leakage has always been the top priority of the operation. Well leakage is a common downhole complex situation in drilling projects. At present, it is necessary to install a plugging short joint in the drilling well to facilitate timely plugging when fluid leaks.

[0003] In the process of realizing the utility model, the inventors found that there are at least the following problems in the technology: the current plugging pup joints usually do not block the fluid delivery pipeline thoroughly enough, resulting in slow leakage in the gap after the fluid is blocked, which makes the subsequent processing work more complicated and even brings greater economic losses.

[0004] To this end, we proposed a circulating plugging short section to solve the above problems. Utility Model Content

[0005] The main purpose of the utility model is to provide a circulating plugging short joint, which combines a first plugging block with a second plugging block, and then drives the inflation cylinder to inflate the airbag, so that it squeezes two movable blocks and two sealing pads, and seals the gap between the first plugging block and the second plugging block, thereby completely preventing well leakage, reducing corresponding economic losses, and effectively solving the problems in the background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A circulation plugging pup joint, comprising a pup joint pipe and an inner fluid pipe fixedly connected to the pup joint pipe, wherein two sides of the inner fluid pipe extend out from openings on both sides of the pup joint pipe respectively, and both sides of the inner fluid pipe are welded and fixed to the pup joint pipe, servo motors are fixed on opposite sides of the pup joint pipe respectively, and an air cylinder is fixed on the outer wall of the pup joint pipe near one of the servo motors, wherein an air pipe entering the inner cavity of the pup joint pipe is fixedly connected to the air cylinder;

[0008] Extension tubes are welded on both sides of the inner cavity of the short tube, and receiving grooves are formed on the opposite sides of the two extension tubes. The output shafts of the two servo motors are coaxially connected with screws, and the first plugging block and the second plugging block are respectively threadedly sleeved on the two screws, and the first plugging block and the second plugging block are respectively fitted with the inner walls of the two receiving grooves;

[0009] A notch is provided on the side of the first leak-plugging block facing the second leak-plugging block, and the second leak-plugging block is fitted into the notch. A mounting groove is provided inside one side of the second leak-plugging block located in the notch, and an airbag is filled in the mounting groove. Movable blocks are fixedly bonded on both sides of the airbag, and sealing gaskets are fixedly bonded on opposite sides of the two movable blocks, respectively, and the two sealing gaskets seal the gap between the first leak-plugging block and the second leak-plugging block.

[0010] As a preferred implementation scheme, extension bosses are integrally welded on the two opposite side walls of the short section pipe, the interiors of the two extension bosses are both hollow in design, and the two servo motors are horizontally installed on the inner walls of the two extension bosses, respectively, so that the servo motor structure remains stable.

[0011] As a preferred embodiment, a mounting plate is welded to the outer wall of the short tube section, wherein the inflatable cylinder is mounted on the mounting plate; the inflatable cylinder is available in the prior art.

[0012] As a preferred embodiment, two screw rods are horizontally arranged in two receiving grooves, and the two screw rods are rotationally connected to two extension tubes, respectively; so that the screw rods can operate stably under the drive of the servo motor.

[0013] As a preferred embodiment, a movable opening identical to the receiving groove thereon is formed on one of the extension tubes, and the air pipe passes through the movable opening and enters the second plugging block; wherein a sufficient length of the air pipe needs to be reserved in the short section pipe so that the functionality of the air pipe can be ensured when the second plugging block is extended and retracted.

[0014] In summary, the technical effects and advantages of the utility model are as follows:

[0015] When a well leakage accident occurs, the circulating plugging nipple makes two servo motors run respectively to drive two screws to operate, so that the first plugging block is combined with the second plugging block, and then drives the air cylinder to operate to inflate the airbag, so that the airbag squeezes the two movable blocks and two sealing pads to seal the gap between the first plugging block and the second plugging block, thereby completely preventing the well leakage phenomenon and reducing the corresponding economic losses.

[0016] When fluid leakage occurs in the internal fluid pipe, the circulating plugging nipple immediately drives two servo motors to operate and drive two screws to operate, so that the first plugging block and the second plugging block are close to each other, and the second plugging block is inserted into the gap of the first plugging block to block the internal space of the internal fluid pipe. At the same time, the air cylinder is driven to operate through the air pipe to inflate air into the air bag, so that the air bag is in an expanded state, and the two movable blocks are squeezed. After the two sealing pads are squeezed, the gap between the first plugging block and the second plugging block can be completely filled, thereby achieving a complete sealing effect and plugging the leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a horizontal cross-sectional view of the utility model;

[0019] Figure 3 For this utility model Figure 2 A magnified view of the structure in the middle.

[0020] In the figure: 1. short tube; 2. internal fluid tube; 3. extension boss; 4. servo motor; 5. mounting plate; 6. inflator; 7. air pipe; 8. extension tube; 9. storage groove; 10. screw; 11. first plugging block; 12. second plugging block; 13. movable port; 14. air bag; 15. movable block; 16. sealing gasket. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-Figure 3 A circulation plugging pup joint comprises a pup joint pipe 1 and an inner fluid pipe 2 fixedly connected to the pup joint pipe 1, wherein the two sides of the inner fluid pipe 2 extend out from the openings on the two sides of the pup joint pipe 1 respectively, and the two sides of the inner fluid pipe 2 are welded and fixed to the pup joint pipe 1, and the two opposite side walls of the pup joint pipe 1 are respectively welded with extension bosses 3 in an integral manner, and the interiors of the two extension bosses 3 are both hollow in design, and servo motors 4 are respectively fixed on the opposite sides of the pup joint pipe 1, and the two servo motors 4 are respectively horizontally mounted on the inner walls of the two extension bosses 3, so that the structure of the servo motors 4 remains stable, and an air cylinder 6 is also fixed on the outer wall of the pup joint pipe 1 near one of the servo motors 4, and a mounting plate 5 is also welded on the outer wall of the pup joint pipe 1, wherein the air cylinder 6 is mounted on the mounting plate 5, and the air cylinder 6 is all in the prior art, wherein an air pipe 7 entering the inner cavity of the pup joint pipe 1 is fixedly connected to the air cylinder 6;

[0023] Wherein, extension tubes 8 are welded on both sides of the inner cavity of the short tube 1, and receiving grooves 9 are formed on the opposite sides of the two extension tubes 8. The output shafts of the two servo motors 4 are coaxially connected with screws 10, and the two screws 10 are horizontally arranged in the two receiving grooves 9, and the two screws 10 are rotatably connected to the two extension tubes 8, so that the screws 10 can operate stably under the drive of the servo motor 4. The first plugging block 11 and the second plugging block 12 are respectively threadedly sleeved on the two screws 10, and the first plugging block 11 and the second plugging block 12 are respectively fitted with the inner walls of the two receiving grooves 9;

[0024] A notch is provided on the side of the first plugging block 11 facing the second plugging block 12, and the second plugging block 12 is inserted into the notch, and a mounting groove is provided inside the side of the second plugging block 12 located in the notch, and the mounting groove is filled with an air bag 14, and a movable opening 13 identical to the receiving groove 9 thereon is formed on one of the extension tubes 8, and the trachea 7 passes through the movable opening 13 and penetrates into the second plugging block 12, wherein the trachea 7 needs to reserve a sufficient length in the short section pipe 1 so that the functionality of the trachea 7 can be ensured when the second plugging block 12 is extended and retracted, and movable blocks 15 are fixedly bonded on both sides of the air bag 14, and sealing gaskets 16 are fixedly bonded on the opposite sides of the two movable blocks 15, respectively, and the two sealing gaskets 16 seal the gap between the first plugging block 11 and the second plugging block 12, and only a small opening is left at the center position of the internal fluid tube 2 (i.e., the position close to the first plugging block 11), so that it is convenient for the two plugging blocks to seal it.

[0025] The circulating plugging nipple: when in use, the corresponding fluid is transported in the inner fluid pipe 2 during drilling; if fluid leakage occurs in the inner fluid pipe 2, the two servo motors 4 are driven to operate and drive the two screws 10 to operate, so that the first plugging block 11 and the second plugging block 12 are close to each other, and finally the second plugging block 12 is inserted into the gap of the first plugging block 11 to block the internal space of the inner fluid pipe 2, and at the same time the air cylinder 6 is driven to operate through the air pipe 7 to inflate into the air bag 14, so that the air bag 14 is in an expanded state, and the two movable blocks 15 are squeezed, so that the two sealing pads 16 can completely fill the gap between the first plugging block 11 and the second plugging block 12 after being squeezed, thereby achieving the best sealing performance and preventing the fluid from continuing to leak.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A circulation plugging nipple, comprising a nipple pipe (1) and an internal fluid pipe (2) fixedly connected to the nipple pipe (1), wherein both sides of the internal fluid pipe (2) are welded and fixed to the nipple pipe (1), characterized in that: A servo motor (4) is fixed to opposite sides of the short tube (1), and an air cylinder (6) is fixed to the outer wall of the short tube (1) near one of the servo motors (4), wherein the air cylinder (6) is fixedly connected to an air pipe (7) entering the inner cavity of the short tube (1); Extension tubes (8) are welded to both sides of the inner cavity of the short tube (1), and receiving grooves (9) are formed on the opposite sides of the two extension tubes (8). The output shafts of the two servo motors (4) are coaxially connected with screw rods (10), and the two screw rods (10) are respectively threadedly sleeved with a first plugging block (11) and a second plugging block (12), and the first plugging block (11) and the second plugging block (12) are respectively fitted with the inner walls of the two receiving grooves (9); A notch is provided on one side of the first leak-blocking block (11) facing the second leak-blocking block (12), and the second leak-blocking block (12) is inserted into the notch. A mounting groove is provided inside one side of the second leak-blocking block (12) located inside the notch, and an air bag (14) is filled in the mounting groove. Movable blocks (15) are fixedly bonded to both sides of the air bag (14), and sealing pads (16) are fixedly bonded to opposite sides of the two movable blocks (15).

2. A circulation plugging nipple according to claim 1, characterized in that: The two opposite side walls of the short tube section (1) are respectively integrally welded with extension bosses (3), and the two servo motors (4) are respectively horizontally mounted on the inner walls of the two extension bosses (3).

3. A circulation plugging nipple according to claim 1, characterized in that: A mounting plate (5) is also welded to the outer wall of the short tube (1), wherein the inflation cylinder (6) is mounted on the mounting plate (5).

4. A circulation plugging nipple according to claim 1, characterized in that: The two screw rods (10) are respectively arranged horizontally in the two receiving grooves (9), and the two screw rods (10) are respectively rotatably connected to the two extension tubes (8).

5. The circulation plugging nipple according to claim 1, characterized in that: A movable opening (13) identical to the receiving groove (9) thereon is formed on one of the extension tubes (8), and the air pipe (7) passes through the movable opening (13) and penetrates into the second leak-blocking block (12).

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