CN211448612U - Anti-blocking bridge plug - Google Patents
Anti-blocking bridge plug Download PDFInfo
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- CN211448612U CN211448612U CN201921910120.XU CN201921910120U CN211448612U CN 211448612 U CN211448612 U CN 211448612U CN 201921910120 U CN201921910120 U CN 201921910120U CN 211448612 U CN211448612 U CN 211448612U
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Abstract
The utility model relates to an anti-blocking bridge plug, which comprises a central tube, wherein the upper end of the central tube is provided with an adjusting short joint, and the lower end is provided with a guide shoe; the anchoring device is arranged in the middle of the central pipe and comprises an upper slip and an upper cone which are sleeved on the upper part of the central pipe, and a lower slip and a lower cone which are sleeved on the lower part of the central pipe; the protective sleeve is detachably sleeved at the upper end of the central pipe and sleeved outside the adjusting short section and the upper slip; when the lower cone and the lower slip move relatively, the lower slip is pushed to be spread and anchored on the casing; after the protective sleeve is disassembled, the upper cone body and the upper slip move relatively to push the upper slip to be spread and anchored on the sleeve. The utility model discloses can prevent through the protective sheath that the slips is unexpected to be strutted, avoid the bridging plug to meet before not going into preset position and hinder the card and sit in advance and seal.
Description
Technical Field
The utility model relates to a prevent blocking bridge plug belongs to oil gas well shutoff instrument in pit.
Background
A bridge plug is used for accomplishing the downhole tool of oil gas well shutoff operation, and the primary function is: the bridge plug is sent to a preset position of a shaft by a cable or a pipe column, and pressure generated by a hydraulic setting tool acts on the slips before the bridge plug is set; in the setting process, the upper pulling force exceeds the cracking tension of the slips, and the upper cone and the lower cone axially extrude and deform the rubber sealing cylinder. The rubber cylinder realizes expansion sealing after setting, and the upper slips and the lower slips are crushed and embedded on the inner wall of the sleeve; after the sealing, the bridge plug separates the adjacent stratums, and the sealing is finished.
The problem that slips are accidentally propped open and are set in advance easily occurs to a conventional bridge plug under the condition that the wall of a well bore is unclean and irregular, particularly, the probability of setting the bridge plug in advance in a horizontal well is higher, once the bridge plug is set, the bridge plug can only be ground by grinding and milling, and great trouble is brought to later-stage construction.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a prevent blocking bridging plug can prevent down that the slips accident from opening through center tube lower extreme step, goes up the slips and prevents to go up the slips accident and strut with design release ring and protective sheath between the centrum, avoids the bridging plug to meet blocking and seat in advance before not going into preset position down.
The utility model provides a prevent blocking bridge plug, include:
the upper end of the central pipe is provided with an adjusting short section, and the lower end of the central pipe is provided with a guide shoe;
the anchoring device is arranged in the middle of the central pipe and comprises an upper slip and an upper cone which are sleeved on the upper part of the central pipe, and a lower slip and a lower cone which are sleeved on the lower part of the central pipe; and
the protective sleeve is detachably sleeved at the upper end of the central pipe and sleeved outside the adjusting short section and the upper slip;
when the lower cone and the lower slip move relatively, the lower slip is pushed to be spread and anchored on the casing; after the protective sleeve is disassembled, the upper cone body and the upper slip move relatively to push the upper slip to be spread and anchored on the sleeve.
The utility model discloses a further improvement lies in, the middle part of center tube is provided with sealing device, sealing device is including setting up go up the slips with packing element between the slips down.
The utility model discloses a further improvement lies in, the both ends of packing element are provided with the back of the body circle, and the inside of packing element is provided with 0 type sealing washer.
The utility model discloses a further improvement lies in, go up the cone with go up and be provided with the release ring between the slips, be provided with on the outer wall of center tube with release ring form assorted recess, the release ring gets into behind the recess go up the cone with go up slips and just can relative motion.
The utility model discloses a further improvement lies in, the upper end of going up the slips is provided with locking device, locking device is including the cover catch and catch seat on the center tube, the catch with the catch seat links to each other through rolling up the skin round pin.
The utility model discloses a further improvement lie in, the upper end outside of center tube be provided with catch complex ratchet, the lower part of ratchet has the round annular, the inside upper end of annular is provided with and adjusts the screw thread that the nipple joint connects soon.
The utility model discloses a further improvement lies in, be provided with spacing step on the outer wall of the lower part of center tube, the upper portion of slips down be provided with spacing step matched with draw-in groove.
The utility model discloses a further improvement lies in, and there is the screw thread lower part of spacing step, the shoes are led in the screw thread grafting.
The utility model has the further improvement that the upper cone is connected with the central tube through a skin rolling pin; meanwhile, the lower cone is connected with the central tube through a skin rolling pin.
The utility model discloses a further improvement lies in, the protective sheath with the hydraulic pressure setting instrument is all connected to the upper end of adjusting the nipple joint.
Compared with the prior art, the utility model has the advantages of:
prevent blocking bridge plug, can prevent through center tube lower extreme step that the slips accident opens down, go up design release ring and protective sheath between slips and the last centrum and prevent that the slips accident from strutting, avoid the bridge plug to meet before not going into preset position and block and sit in advance and seal. The utility model discloses change conventional bridging plug and meet the current situation that blocks the easy seat of card and seal, increase in the instrument structure and prevent the unexpected structure that struts of slips, make the bridging plug meet the card of blocking and also can not sit in advance and seal under going into the in-process, guarantee that the bridging plug targets in place smoothly and sits and seal a success rate.
Drawings
Fig. 1 is a schematic structural view of an anti-jamming bridge plug according to an embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
The meaning of the reference symbols in the drawings is as follows: 1. the device comprises a central tube, 2, an anchoring device, 3, a protective sleeve, 11, an adjusting short joint, 12, a guide shoe, 13, a locking ring seat, 14, a locking ring, 15, a groove, 16, a limiting step, 21, a rubber cylinder, 22, an upper slip, 23, a lower slip, 24, an upper cone, 25, a lower cone, 26, a release ring, 27, a type 0 sealing ring, 28, a back ring, 29, a rolling leather pin, 30 and a screw.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Figure 1 schematically illustrates an anti-snag bridge plug according to one embodiment of the present invention. According to the utility model discloses a prevent blocking bridging plug can prevent through center tube lower extreme step that the slips accident is opened down, goes up design release ring and protective sheath between slips and the last centrum and prevents that the slips accident from strutting, avoids the bridging plug to meet blocking and seat in advance before not going into preset position down.
As shown in fig. 1, the anti-blocking bridge plug according to the present embodiment includes a central tube 1. The central tube 1 is of a circular tube type structure, a guide shoe 12 is arranged at the lower end of the central tube, and an adjusting short section 11 is arranged at the upper end of the central tube. The middle part of center tube 1 is provided with anchoring device 2, anchoring device 2 includes, the cover is established last slips 22 and last cone 24 on the upper portion of center tube 1 to and the cover is established lower slips 23 and lower cone 25 of the lower part of center tube 1. Prevent hindering card bridge plug still includes protective sheath 3, the detachable connection of protective sheath 3 is in the upper end of center tube 1. Wherein the protective casing 3 is sleeved outside the adjusting short joint 11 and the upper slip 22.
Preferably, the upper cone 24 is a tapered structure with a thick lower portion and a thin upper portion. The thinner end of the upper cone 24 extends into the bottom of the upper slip 22, and when the upper cone 24 and the upper slip 22 move relatively, the upper cone 24 pushes the upper slip 22 to expand, and then the fragments of the upper slip 22 are expanded outwards and anchored on the casing. The lower cone 25 is a conical structure with a thin lower part and a thick upper part, and when the lower cone 25 and the lower slip 23 move relatively, the lower slip 23 is pushed to be spread and anchored on the casing.
In use of the anti-snag bridge plug according to this embodiment, the casing 3 covers the exterior of the upper slip 22 and the adjusting sub 11. In the process of moving the anti-blocking bridge plug, the outer part of the upper slip 22 is completely wrapped in the protective sleeve 3, and the upper slip 22 can be unfolded only after being pushed out of the protective sleeve 3. In this way, the upper slips 22 are effectively prevented from being accidentally spread.
In one embodiment, the central tube is provided with a sealing device in the middle, the sealing device comprises a rubber sleeve 21, and the rubber sleeve 21 has certain elasticity. The upper end of the rubber cylinder 21 is connected with the upper slip 22, and the lower end is connected with the lower slip 23.
In a preferred embodiment, the two ends of the rubber cylinder 21 are provided with back rings 28, and two sets of back rings 28 are respectively arranged at the upper part and the lower part of the rubber cylinder 21. Through setting up back of body 28, can protect packing element 21 to a certain extent, prevent that packing element 21 from producing under the uneven condition of high temperature, high pressure and atress and warping. In this embodiment, a 0-type seal ring 27 is provided inside the rubber cylinder 21. Preferably, the middle part of the inner wall of the rubber cylinder 21 is provided with an annular groove, the annular groove is arranged in a circle along the circumferential direction of the inner wall of the rubber cylinder 21, and the 0-type sealing ring 27 is arranged in the annular groove. The 0-type gasket 27 is provided between the rubber tube 21 and the center tube 1, and is capable of sliding and sealing with the center tube 1.
In one embodiment, in a preferred embodiment, a release ring 26 is disposed between the upper cone 24 and the upper slip 22, the release ring 26 blocking the end of the upper cone 24 to prevent the upper cone 24 from advancing to advance the upper slip 22. The outer wall of the central tube 1 is provided with a groove 15, and the shape of the groove 15 is matched with the shape of the release ring 26. Wherein the thickness of the release ring 26 is close to the depth of the groove 15, into which groove 15 the release ring 26 can fall when it is moved into position in said groove 15. The upper cone 24 and the upper slip 22 can move relative to each other only after the release ring 26 enters the groove 15.
In use of the anti-snag bridge plug according to this embodiment, the upper cone 24 is prevented from moving into the upper slip 22 by providing a release ring 26 between the upper cone 24 and the upper slip 22, causing the upper slip 22 to be opened prematurely. The upper cone 24 and the upper slip 22 are separated by a release ring 26, and the upper slip 22 cannot be expanded in the protective sleeve 3 when parts such as the rubber cylinder 21, the lower cone 25 and the upper cone 24 are blocked. During setting, the hydraulic pressure pushes the upper slips 22, the upper cone 24, the release ring 26 and the like to move downwards, the lower slips 23 are firstly expanded, and then the rubber cylinder 21 is compressed. When the release ring 26 reaches the position of the groove 15 on the base pipe 1, the release ring 26 is received in the groove and the upper slips 22 are in direct contact with the upper cone 24, thereby causing the upper slips 22 to spread and anchor.
In one embodiment, the upper end of the upper slip 22 is provided with a locking device comprising a locking ring 14 and a locking ring seat 13 which are sleeved on the base pipe 1, and the locking ring 14 and the locking ring seat 13 are connected by a roll pin 29. Preferably, the lock ring seat 13 is provided with a screw hole, and the upper slip 22 is provided with a screw hole or a through hole at a corresponding position. Wherein the upper slip 22 is connected to the shackle seat 13 by means of a screw 30.
In the anti-jamming bridge plug according to the present embodiment, the upper slips 22 are locked to the base pipe 1 by a locking device. The lock ring 14 is connected with the lock ring seat 13 through a skin rolling pin, so that the connection is stable, and the disassembly and the assembly are convenient.
In a preferred embodiment, the upper end of the central tube 1 is externally provided with a ratchet matched with the locking ring 14, the lower part of the ratchet is provided with a ring of ring grooves, and the upper inner end of the ring grooves is provided with threads screwed with the adjusting nipple 11.
In one embodiment, the outer wall of the lower part of the central tube 1 is provided with a limiting step 16, and the limiting step 16 is preferably a right-angled step. And a clamping groove matched with the limiting step 16 is arranged on the inner side of the upper part of the lower slip 23. Through setting up spacing step 16 and draw-in groove, can prevent that relative center tube 1 from moving up and lead to lower slips 23 to break and strut after lower slips 23 meets the hindrance.
In one embodiment, the lower portion of the limit step 16 is threaded, the guide shoe 12 is provided with a screw hole, and the threads on the lower portion of the limit step 16 are matched with the screw hole and screwed together. The lower slip 23 is provided with a screw hole or a through hole, and the lower slip 23 is connected to the limit step 16 through a screw 30. Through the mode that screw 30 is connected, not only connect more firmly, the dismouting is more convenient simultaneously.
In one embodiment, the upper cone 24 is connected to the center tube 1 by a wrapper pin 29. At the same time, the lower cone 25 is connected to the central tube 1 by a wrapper pin 29.
In one embodiment, the upper ends of the protective sleeve 3 and the adjusting short joint 11 are connected with a hydraulic setting tool
When the anti-blocking bridge plug is used, the anti-blocking bridge plug is connected with a special hydraulic setting tool through the protective sleeve 3 and the adjusting short section 11, and the upper end of the special hydraulic setting tool is in threaded connection with the oil pipe buckle pin. The trivial matters anti-blocking bridge plug of the embodiment is lowered to the designed well depth position, the ball is thrown from the well mouth, and the pressure is applied to the oil pipe. The tubing internal pressure is transmitted from the hydraulic special setting tool to the upper slip 22 and the lower slip 23 on the central tube 1, and the upper cone 24 and the lower cone 25, so that the upper slip 22, the upper cone 24, the lower slip 23 and the lower cone 25 are pushed to move downwards. After the upper slips 22 and the lower slips 23 are opened, the pressure is continuously applied to start extruding the rubber cylinder 21 until the bridge plug is completely set. And then continuously pressurizing, releasing the bridge plug when the pressure is greater than the maximum setting pressure of the bridge plug, and taking out the upper pipe column.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. An anti-snag bridge plug, comprising:
the device comprises a central pipe (1), wherein the upper end of the central pipe (1) is provided with an adjusting short section (11), and the lower end of the central pipe is provided with a guide shoe (12);
the anchoring device (2) is arranged in the middle of the central tube (1), and the anchoring device (2) comprises an upper slip (22) and an upper cone (24) which are sleeved on the upper part of the central tube (1), and a lower slip (23) and a lower cone (25) which are sleeved on the lower part of the central tube (1); and
the protective sleeve (3) is detachably sleeved at the upper end of the central pipe (1), and the protective sleeve (3) is sleeved outside the adjusting short section (11) and the upper slip (22);
when the lower cone (25) and the lower slip (23) move relatively, the lower slip (23) is pushed to be spread and anchored on the casing; after the protective sleeve (3) is disassembled, the upper cone (24) and the upper slip (22) are pushed to be spread and anchored on the sleeve when moving relatively.
2. Anti-jamming bridge plug according to claim 1, characterized in that the central tube (1) is provided with sealing means in the middle, which sealing means comprise a rubber cylinder (21) arranged between the upper slips (22) and the lower slips (23).
3. Anti-jamming bridge plug according to claim 2, characterized in that the rubber sleeve (21) is provided with back rings (28) at both ends and the rubber sleeve (21) is provided with a type 0 sealing ring (27) inside.
4. The anti-blocking bridge plug according to claim 3, characterized in that a release ring (26) is arranged between the upper cone (24) and the upper slip (22), a groove (15) matched with the release ring (26) in shape is arranged on the outer wall of the central tube (1), and the upper cone (24) and the upper slip (22) can move relatively only after the release ring (26) enters the groove (15).
5. The anti-jamming bridge plug according to any one of claims 1 to 4, characterized in that the upper end of the upper slip (22) is provided with a locking device comprising a locking ring (14) and a locking ring seat (13) which are sleeved on the central pipe (1), the locking ring (14) and the locking ring seat (13) being connected by a sheath rolling pin (29).
6. The anti-blocking bridge plug according to claim 5, characterized in that the upper end of the central tube (1) is externally provided with a ratchet which is matched with the locking ring (14), the lower part of the ratchet is provided with a ring of ring grooves, and the upper inner end of the ring grooves is provided with threads which are screwed with the adjusting short section (11).
7. The anti-blocking bridge plug according to claim 6, characterized in that a limiting step (16) is arranged on the outer wall of the lower part of the central tube (1), and a clamping groove matched with the limiting step (16) is arranged on the upper part of the lower slip (23).
8. The bridge plug as recited in claim 7, wherein the lower portion of the limit step (16) is threaded, and the threads are screwed with the guide shoes (12).
9. Anti-jamming bridge plug according to claim 8, characterized in that the upper cone (24) is connected to the central tube (1) by a crimped pin (29); meanwhile, the lower cone (25) is connected with the central tube (1) through a skin rolling pin (29).
10. The anti-blocking bridge plug according to claim 9, characterized in that the upper ends of the protective casing (3) and the adjusting nipple (11) are connected with a hydraulic setting tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921910120.XU CN211448612U (en) | 2019-11-07 | 2019-11-07 | Anti-blocking bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921910120.XU CN211448612U (en) | 2019-11-07 | 2019-11-07 | Anti-blocking bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211448612U true CN211448612U (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921910120.XU Active CN211448612U (en) | 2019-11-07 | 2019-11-07 | Anti-blocking bridge plug |
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| Country | Link |
|---|---|
| CN (1) | CN211448612U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780220A (en) * | 2019-11-07 | 2021-05-11 | 中国石油化工股份有限公司 | Anti-blocking bridge plug |
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2019
- 2019-11-07 CN CN201921910120.XU patent/CN211448612U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780220A (en) * | 2019-11-07 | 2021-05-11 | 中国石油化工股份有限公司 | Anti-blocking bridge plug |
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