CN221462266U - Slip assembly of spiral setting bridge plug - Google Patents

Abstract

The utility model discloses a slip assembly of a spiral setting bridge plug, which comprises an annular slip and a conical sleeve, wherein one end of the inner side of the annular slip is provided with a conical first joint surface, a plurality of guide posts are arranged on the first joint surface, a plurality of anti-slip threads are arranged on the outer wall of the annular slip, a plurality of expansion guide grooves are further formed in the annular slip, and the annular slip is divided into a plurality of clamping tiles through the expansion guide grooves; one end of the outer wall of the conical sleeve is provided with a second fitting surface which is beneficial to the comfort, a spiral guide groove is formed in the second fitting surface, the spiral direction of the guide groove is opposite to that of the anti-skid thread, and when the conical sleeve is inserted into the annular clamp tile. The annular slips are provided with the anti-slip threads, friction force between the annular slips and the inner wall of a shaft is increased through a multi-thread-shaped structure, reliability of fixing of the slips in the shaft is improved, setting effect can be remarkably improved, damage to the inner wall of a shaft pipeline is reduced, service life is prolonged, and application range is wider.

Description

Slip assembly of spiral setting bridge plug

Technical Field

The utility model belongs to the field of bridge plug setting, and particularly relates to a slip assembly for a spiral setting bridge plug.

Background

The bridge plug is an oil-gas well sealing tool, which is generally conveyed to a preset position of a shaft by using a cable or a pipe column, pressure generated by gunpowder blasting, hydraulic setting or mechanical setting tool acts on an upper slip, pulling force acts on a tension rod, two forces are applied to a sealing rubber cylinder by an upper cone and a lower cone to pull the sealing rubber cylinder upwards and downwards, and when the pulling force reaches a certain value, the tension rod breaks, so that the setting tool is separated from the bridge plug. At the moment, the locking device on the bridge plug central tube plays a role, the upper slip and the lower slip are broken and embedded on the inner wall of the sleeve, and the rubber cylinder is expanded and sealed to finish setting.

In the prior art, the setting slips are engaged and fixed with the inner wall of the shaft in a friction mode, and the damage to the inner wall of the shaft can be reduced in the mode, but the pressure bearing capacity is smaller, the reliability of a fracturing process is difficult to ensure, and the setting slips cannot be used in shafts with larger pressure; the expansion type slips are adopted to push the latch to be embedded into the inner wall of the shaft for fixing, and the fixing bearing strength is increased, but the damage to the inner wall of the shaft is larger in the mode, and the damage to the inner wall of the shaft is larger when the bearing stress is larger, so that the service life of the shaft can be seriously influenced.

There is therefore a need for a slip assembly for a screw setting bridge plug that addresses these problems.

Disclosure of utility model

The utility model aims to solve the problem of providing a slip assembly of a screw setting bridge plug, which utilizes screw teeth to bite the casing wall, but has small depth, can prolong the service life of the casing, improves the bearing capacity and ensures the working stability and the effectiveness.

In order to solve the technical problems, the utility model adopts the following technical scheme:

The slip assembly of the spiral setting bridge plug comprises an annular slip and a conical sleeve, wherein one end of the inner side of the annular slip is provided with a conical first joint surface, a plurality of guide posts are arranged on the first joint surface, a plurality of anti-slip threads are arranged on the outer wall of the annular slip, a plurality of expansion guide grooves are further formed in the annular slip, and the annular slip is divided into a plurality of clamping tiles through the expansion guide grooves; the utility model discloses a tapered sleeve, including annular clamp, guide post, annular slip, conical sleeve outer wall, guide post, annular clamp, annular slip, conical sleeve outer wall one end is provided with the second binding face that is helped, set up spiral guide way on the second binding face, the spiral direction of guide way with the spiral direction of anti-skidding screw thread is opposite, works as the conical sleeve inserts annular clamp is worn, on the annular slip first binding face will with the laminating of the second binding face on the conical sleeve, just the guide post is located the guide way.

Preferably, the taper of the second abutment surface on the conical sleeve is the same as the taper of the first abutment surface on the annular slip.

So set up, the pig tripe is the same can increase the laminating area of first laminating face and second laminating face, improves atress intensity.

Preferably, the outer diameter of the annular slip is not smaller than the inner diameter of the conical sleeve, and the outer diameter of the conical sleeve is not smaller than the outer diameter of the annular slip.

By the arrangement, the annular slip can be prevented from sliding into the conical sleeve due to the fact that the outer diameter is too small, and meanwhile, the conical sleeve is prevented from being too small in outer diameter to provide enough extrusion force for the annular slip so that slip sheets can be expanded.

Preferably, the guide posts are located on the first fitting surface of the clamping tile, the number of the guide posts on each clamping tile is two, and the two guide posts are distributed along the spiral direction of the guide groove.

So set up, two guide posts can make the slip piece more reliable and more stable with the connection of toper cover to along the spiral shell direction distribution of guide way can ensure Liu Ang guide posts can both insert in the guide way that corresponds.

Preferably, the number of the guide grooves on the second abutting surface is the same as the number of the slip segments on the annular slip.

This arrangement ensures that each guide slot is able to correspondingly push the slip segments to expand.

The utility model has the advantages and positive effects that:

The utility model adopts the annular slip with the conical surface and the conical sleeve with the conical surface with the same angle, the conical surface of the annular slip is provided with the guide post, the conical surface of the conical sleeve is provided with the spiral guide groove, the outer surface of the annular slip is provided with the anti-skid screw thread which is opposite to the spiral guide groove in screw direction, the conical sleeve and the annular slip move oppositely under the mutual matching of the guide groove and the guide post in the setting process, and the conical sleeve can be subjected to the double effects of the reaction force of the rubber cylinder arranged on the central tube and the friction force caused by the rubber material used by the rubber cylinder, so the annular slip can also rotate along the second bonding surface of the conical sleeve under the limit guiding effect of the guide groove while the annular sleeve and the annular slip move oppositely. The annular slips can rotate relative to the inner wall of the casing during rotation. The slip sheets are guaranteed to form a rotation trend between the anti-slip threads and the inner wall of the shaft when being expanded in the setting process. Namely, a plurality of clamping tiles in the annular slip generate circumferential rotation relative to the inner wall of the sleeve while performing radial expansion; the superposition of the two movements enables the slip sheets to generate a screwing effect with the shaft, so that the bridge plug can be firmly anchored in the shaft, damage to the shaft is reduced, and meanwhile, the pressure-bearing requirement of setting can be met.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic elevational view of the present utility model;

FIG. 2 is a schematic longitudinal cross-sectional view of the internal structure of the present utility model;

FIG. 3 is a schematic view of the location of guide posts on the card tile of the present utility model;

fig. 4 is an enlarged view of the structure at a in fig. 2.

The reference numerals are explained as follows:

1. An annular slip; 101. clamping tiles; 102. expanding the guide groove; 103. a first bonding surface; 104. a guide post; 105. an anti-skid thread; 2. a conical sleeve; 3. a second bonding surface; 4. a guide groove.

Detailed Description

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

The utility model is further described below with reference to the accompanying drawings:

Example 1: as shown in fig. 1-4, a slip assembly of a spiral setting bridge plug comprises an annular slip 1 and a conical sleeve 2, wherein one end of the inner side of the annular slip 1 is provided with a conical first joint surface 103, a plurality of guide posts 104 are arranged on the first joint surface 103, a plurality of anti-slip threads 105 are arranged on the outer wall of the annular slip 1, a plurality of expansion guide grooves 102 are also arranged on the annular slip 1, and the annular slip 1 is divided into a plurality of slip sheets 101 through the expansion guide grooves 102; the second laminating face 3 that the toper cover 2 outer wall one end was provided with to be helped, offered helical guide way 4 on the second laminating face 3, the spiral direction of guide way 4 is opposite with the spiral direction of anti-skidding screw 105, when toper cover 2 inserts annular slips 1, the first laminating face 103 on the annular slips 1 will laminate with the second laminating face 3 on the toper cover 2, and guide post 104 is located guide way 4.

As shown in fig. 2 and fig. 4, the taper of the second bonding surface 3 on the conical sleeve 2 is the same as the taper of the first bonding surface 103 on the annular slip 1, so that the bonding area of the first bonding surface 103 and the second bonding surface 3 can be increased by the same pig tripe, and the stress intensity is improved.

As shown in FIG. 2, the outer diameter of the annular slip 1 is not smaller than the inner diameter of the conical sleeve 2, and the outer diameter of the conical sleeve 2 is not smaller than the outer diameter of the annular slip 1, so that the annular slip 1 can be prevented from sliding into the conical sleeve 2 due to the too small outer diameter, and meanwhile, the conical sleeve 2 cannot provide enough extrusion force for the annular slip 1 to expand the slip sheets 101 due to the too small outer diameter.

As shown in fig. 3, the guide posts 104 are located on the first attaching surface 103 on the clamping tile 101, and the number of the guide posts 104 on each slip sheet 101 is two, and the two guide posts 104 are distributed along the guide grooves 4 in a spiral manner, so that the slip sheets 101 and the conical sleeve 2 can be connected more stably and reliably by the two guide posts 104, and the Liu Ang guide posts 104 can be inserted into the corresponding guide grooves 4 along the spiral direction of the guide grooves 4.

Specifically, the number of the guide grooves 4 on the second abutting surface 3 is the same as the number of the slip sheets 101 on the annular slip 1, so that each guide groove 4 can correspondingly push the card tile 101 to expand.

The working procedure of this embodiment is: when the annular slip 1 and the conical sleeve 2 are sleeved on a setting tool in use, if the slip assembly is required to be fixed through the slip assembly after entering a shaft, the conical sleeve 2 can relatively move with the annular slip 1 through relevant parts on the setting tool, the conical sleeve 2 can apply thrust to a first joint surface 103, which is jointed with a second joint surface 3, on each clamping tile 101 on the annular slip 1, so that the slip sheet 101 is expanded, when the slip sheet 101 is expanded, anti-slip threads 105 on the clamping tile 101 can generate a rotation trend due to larger friction with the inner wall of the shaft, and when the first joint surface 103 is jointed with the second joint surface 3 to push and rotate, under the interaction of a guide post 104 and a guide groove 4, the conical sleeve 2 and the annular slip 1 can generate a relative rotation trend, and after the rotation trend, the rotation direction of the annular slip 1 is opposite to the rotation direction of the anti-slip threads 105 and the inner wall of the shaft, so that the slip sheet 101 on the annular slip 1 is further expanded, and the friction between the anti-slip threads 105 and the inner wall of the annular slip 1 can be further expanded, namely, the anti-slip sheet 101 is also rotated relative to the inner wall of the annular slip 1, and the sleeve is also rotated in a plurality of radial directions; the addition of the two movements creates a tightening effect between the slip segments 101 and the casing, thereby enabling the bridge plug to be firmly anchored in the casing with the cooperation of the annular slip 1 and the conical sleeve 2.

In this embodiment, in order to ensure the consistency and continuity of the threads on each clamping tile 101 on the annular slip 1, the split type slip is not utilized, but the whole round rod is used for processing and forming, the anti-slip threads 105 are engraved on the outer wall of the bar during processing, then the expansion guide groove 102 is further engraved on the outer wall of the annular material, the side wall of the annular material is not completely cut off by the expansion guide groove 102, and only the connecting thickness is reduced at the connecting position of the adjacent clamping tiles 101 as much as possible, so that the slip sheets 101 can be separated from each other, and the adjacent clamping tiles 101 can be buffered through the expansion guide groove 102.

The foregoing describes one embodiment of the present utility model in detail, but the disclosure is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.

Claims (5)

1. A slip assembly for a screw setting bridge plug, comprising: the novel annular slip comprises an annular slip (1) and a conical sleeve (2), wherein a conical first joint surface (103) is arranged at one end of the inner side of the annular slip (1), a plurality of guide posts (104) are arranged on the first joint surface (103), a plurality of anti-slip threads (105) are arranged on the outer wall of the annular slip (1), a plurality of expansion guide grooves (102) are further formed in the annular slip (1), and the annular slip (1) is divided into a plurality of clamping tiles (101) through the expansion guide grooves (102); the utility model discloses a conical sleeve (2) outer wall one end is provided with second binding face (3) that is helped, spiral guide way (4) have been seted up on second binding face (3), the spiral shell direction of guide way (4) with the spiral shell direction of antiskid screw thread (105) is opposite, works as conical sleeve (2) inserts when annular slips (1), on annular slips (1) first binding face (103) will with second binding face (3) laminating on conical sleeve (2), just guide post (104) are located in guide way (4).

2. A slip assembly for a screw setting bridge plug according to claim 1, wherein: the taper of the second abutting surface (3) on the conical sleeve (2) is the same as the taper of the first abutting surface (103) on the annular slip (1).

3. A slip assembly for a screw setting bridge plug according to claim 1, wherein: the outer diameter of the annular slip (1) is not smaller than the inner diameter of the conical sleeve (2), and the outer diameter of the conical sleeve (2) is not smaller than the outer diameter of the annular slip (1).

4. A slip assembly for a screw setting bridge plug according to claim 1, wherein: the guide posts (104) are all located on the first joint surface (103) on the slip sheet (101), the number of the guide posts (104) on each slip sheet (101) is two, and the two guide posts (104) are distributed along the guide grooves (4) in a screw direction.

5. A slip assembly for a screw setting bridge plug according to claim 1, wherein: the number of the guide grooves (4) on the second abutting surface (3) is the same as the number of the slip sheets (101) on the annular slip (1).