CN219864941U - A soluble bridging plug for oil gas well seal - Google Patents

Abstract

The utility model relates to the technical field of bridge plugs and discloses a soluble bridge plug for an oil gas well sealing layer, which comprises a joint, wherein the bottom of the joint is fixedly connected with a slip body, the bottom of the slip body is movably sleeved with a cone, the top of the outer side of the cone is movably sleeved with a sealing component, the bottom of the cone is fixedly connected with a bottom fixing piece, the other end of a movable plate is provided with a roller groove, the inner side of the roller groove is fixedly connected with a second cylindrical block, the outer side of the second cylindrical block is movably sleeved with a movable roller, the inner side of a second cylindrical pipe is movably sleeved with a second telescopic rod, the bottom of the movable plate is fixedly connected with a second fixed block, the inner side of the second fixed block is fixedly connected with a second fixed rod, the outer side of the second fixed rod is movably sleeved with the other end of the second telescopic rod, and the movable roller can enable the bridge plug to be in a centered position, so that offset blocking is avoided in the process of sending the bridge plug into a well.

Description

A soluble bridging plug for oil gas well seal

Technical Field

The utility model relates to the technical field of bridge plugs, in particular to a soluble bridge plug for an oil gas well sealing layer.

Background

At present, bridge plugs, packers and other plugging tools are commonly used in the fracturing construction of low-permeability oil and gas wells at home and abroad for staged fracturing construction. The bridge plug has the characteristics of few construction procedures, accurate packing position, multiple segmentation stages and the like, so the bridge plug is widely applied to actual construction. The removable bridge plug and the packer are required to be operated in complex sites, and even have the problems of difficult starting, damage to the inner wall of the casing in the using process, casing repair and the like; the types of bridge plugs commonly used at present are cast iron bridge plugs, composite bridge plugs, large-diameter bridge plugs and removable bridge plugs. Except for the removable bridge plugs in the plugging tools, the bridge plugs of other types need to be largely drilled after fracturing construction; the large-diameter bridge plug is not required to be drilled out temporarily after fracturing construction, but a throttle is formed on a production channel, so that the production channel is not beneficial to drainage, and the drilling operation is required to be performed later. Moreover, as the length of the horizontal section of the unconventional oil and gas well is continuously increased, the drilling and grinding cost and difficulty are increased.

The existing bridge plug is mostly connected with a setting tool through a specific connecting piece, setting force released by the setting tool acts on the connecting piece through a piston rod, so that a bridge plug rubber cylinder is extruded and expanded until the bridge plug rubber cylinder is tightly attached to the inner wall of a sleeve under the setting force, meanwhile, slip split sections are gradually opened, and inclined slip teeth are slowly inlaid into the inner wall of the sleeve to keep the rubber cylinder in a compression molding state, and finally the underground plugging work of the bridge plug is completed.

However, existing soluble bridge plugs suffer from the following disadvantages when delivered inside the cannula: the bridging plug can often take place to collide with the friction with sheathed tube inner wall at the in-process of sending into, blocks even, leads to bridging plug to damage and warp, influences the effect of shutoff to sheathed tube inner wall can exist earth, and along with the bridging plug is sent into the intraductal distance of cover length, the bridging plug surface can pile up more earth, leads to the in-process of carrying the bridging plug to appear blocking easily.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, the present utility model provides a soluble bridge plug for an oil and gas well seal, which solves the above-mentioned problems of the prior art.

The utility model provides the following technical scheme: the utility model provides a soluble bridging plug for oil gas well seal, includes connects, the bottom fixedly connected with slips body of joint, the bottom activity of slips body has cup jointed the cone, seal assembly has been cup jointed in the top activity in the cone outside, the bottom fixedly connected with bottom mounting of cone, the movable groove has been seted up to the bottom in the bottom mounting outside, the inboard fixedly connected with cylinder piece in movable groove, the fly leaf has been cup jointed in the outside activity of cylinder piece in first number, the gyro wheel groove has been seted up to the other end of fly leaf, the inboard fixedly connected with cylinder piece in second number in gyro wheel groove, the activity of the outside of cylinder piece in second number has cup jointed movable gyro wheel, the bottom fixedly connected with fixed block in bottom of bottom mounting, the inboard fixedly connected with dead lever in first number in the dead lever, the outside activity of No. two cylinder pipes has cup jointed No. two telescopic links, the bottom fixedly connected with No. two fixed blocks in second number in the bottom fixedly connected with of fly leaf, no. two telescopic links in second number in the outside of fixed link.

Further, the middle fixedly connected with fixed cylinder of bottom mounting bottom, the bottom fixedly connected with cylinder pipe in the fixed cylinder outside, the inboard activity of cylinder pipe has cup jointed a telescopic link, the other end fixedly connected with fixed plate of a telescopic link, the fixed surface of fixed plate fixedly connected with cleaning brush.

Further, one end of the first cylindrical tube, which is close to the fixed cylinder, is higher than one end, which is far away from the fixed cylinder.

Furthermore, the cleaning brush is made of polypropylene.

Further, the inside fixedly connected with spring No. one of No. two cylinder pipes, the other end and the telescopic link fixed connection No. two of spring.

Further, the inside fixedly connected with No. two springs of cylinder pipe, no. two other ends and the telescopic link fixed connection of spring.

The utility model has the technical effects and advantages that:

according to the utility model, the centering positioning device is arranged, and the first spring generates thrust to the second telescopic rod in the process of feeding the bridge plug into the well drilling, so that the movable plate is outwards opened, rolling friction is generated between the movable roller and the inner wall of the pipeline, the friction force is small, the movable rollers around the movable roller can enable the bridge plug to be positioned in a centering position, offset and blocking in the process of feeding the bridge plug are avoided, and the process of feeding the bridge plug is smoother.

According to the utility model, the cleaning brush is arranged, so that the soil and dust on the inner wall of the pipeline can be cleaned by the cleaning brush, and the blocking caused by the blockage of the movable idler wheels and the bridge plug by the soil is avoided.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a schematic diagram of a movable roller structure according to the present utility model.

Fig. 3 is a schematic structural view of a second telescopic rod according to the present utility model.

Fig. 4 is a schematic view of the bottom fixing member according to the present utility model.

Fig. 5 is a schematic view of a moving plate structure according to the present utility model.

FIG. 6 is a schematic view of a spring structure of the present utility model.

Fig. 7 is a schematic diagram of a second spring structure according to the present utility model.

The reference numerals are: 1. a joint; 101. a slip body; 102. a seal assembly; 103. a cone; 2. a bottom fixing member; 21. a movable groove; 22. a first cylindrical block; 201. a first fixed block; 202. a first fixing rod; 203. a second cylindrical tube; 231. a first spring; 204. a second telescopic rod; 3. a movable plate; 31. a roller groove; 32. a second cylindrical block; 301. a movable roller; 302. a second fixed block; 303. a second fixing rod; 4. fixing the cylinder; 401. a first cylindrical tube; 411. a second spring; 402. a first telescopic rod; 403. a fixing plate; 404. and cleaning the brush.

Description of the embodiments

The embodiments of the present utility model will be clearly and fully described below with reference to the accompanying drawings, and the configurations of the structures described in the following embodiments are merely illustrative, and a soluble bridge plug for an oil and gas well seal according to the present utility model is not limited to the structures described in the following embodiments, and all other embodiments obtained by a person skilled in the art without making any inventive effort are within the scope of the present utility model.

Referring to fig. 1-7, the utility model provides a soluble bridge plug for sealing an oil-gas well, comprising a joint 1, wherein the bottom of the joint 1 is fixedly connected with a slip body 101, the bottom of the slip body 101 is movably sleeved with a cone 103, the top of the outer side of the cone 103 is movably sleeved with a sealing component 102, the bottom of the cone 103 is fixedly connected with a bottom fixing piece 2, the bottom of the outer side of the bottom fixing piece 2 is provided with a movable groove 21, the inner side of the movable groove 21 is fixedly connected with a first cylindrical block 22, the outer side of the first cylindrical block 22 is movably sleeved with a movable plate 3, the other end of the movable plate 3 is provided with a roller groove 31, the inner side of the roller groove 31 is fixedly connected with a second cylindrical block 32, the outer side of the second cylindrical block 32 is movably sleeved with a movable roller 301, the bottom of the bottom fixing piece 2 is fixedly connected with a first fixing block 201, the inner side of the first fixing block 201 is fixedly connected with a first fixing rod 202, the outside activity of dead lever 202 has cup jointed No. two cylinder pipes 203, no. two cylinder pipes 203's inboard activity has cup jointed No. two telescopic links 204, the bottom fixedly connected with No. two fixed blocks 302 of fly leaf 3, no. two fixed blocks 302's inboard fixedly connected with No. two dead levers 303, no. two the outside of dead lever 303 and No. two telescopic links 204's the other end activity cup joints, in the in-process of sending the bridging plug into the well drilling inside, no. one spring 231 produces thrust to No. two telescopic links 204, thereby make fly leaf 3 open to the outside, the rolling friction takes place for the inner wall of movable roller 301 and pipeline, the frictional force is less, and the movable roller 301 all around can make the bridging plug be in the position in the middle, avoid taking place the skew card in the in-process of sending into the well drilling, make the in-process of sending into the bridging plug smoother.

In a preferred embodiment, the middle fixedly connected with fixed cylinder 4 of bottom mounting 2 bottom, the bottom fixedly connected with cylinder pipe 401 in the outside of fixed cylinder 4, the inboard activity of cylinder pipe 401 has cup jointed telescopic link 402 No. one, the other end fixedly connected with fixed plate 403 of telescopic link 402, the fixed plate 403's fixed surface is connected with cleaning brush 404, cleaning brush 404 can clear up the earth of pipeline inner wall, the dust, avoids movable roller 301 to be blocked by earth and leads to the card to be in touch with, unable rotation.

In a preferred embodiment, the end of the first cylindrical tube 401 near the fixed cylinder 4 is higher than the end far from the fixed cylinder 4, so that the cleaning brush 404 cleans the inner wall of the tube more sufficiently.

In a preferred embodiment, the cleaning brush 404 is polypropylene, which has high impact resistance, strong mechanical properties, and resistance to various organic solvents and acid-base corrosion.

In a preferred embodiment, the first spring 231 is fixedly connected to the inner side of the second cylinder 203, the other end of the first spring 231 is fixedly connected to the second telescopic rod 204, and the first spring 231 generates thrust to the second telescopic rod 204, so that the movable plate 3 is outwards opened, the movable roller 301 is always in contact with the inner wall of the pipeline, and the device is always kept in a centered position.

In a preferred embodiment, the inner side of the first cylindrical tube 401 is fixedly connected with a second spring 411, the other end of the second spring 411 is fixedly connected with a first telescopic rod 402, and when encountering a narrower pipeline, the first telescopic rod 402 is extruded into the first cylindrical tube 401 by the pipeline, so that the cleaning member is prevented from being clamped by the pipeline.

The working principle of the utility model is as follows: the in-process of sending into the well drilling with the bridging plug, spring 231 produces thrust to No. two telescopic links 204 to make fly leaf 3 open to the outside, movable roller 301 takes place rolling friction with the inner wall of pipeline, the frictional force is less, and movable roller 301 all around can make the bridging plug be in the position in the middle, avoid sending into the in-process of well drilling and take place the skew card and stop, make the in-process of sending into the bridging plug more smooth, clean brush 404 can clear up the earth of pipeline inner wall, the dust avoids movable roller 301 to be blocked by earth and lead to card to stop, unable rotation.

Claims (6)

1. A soluble bridge plug for an oil and gas well seal comprising a joint (1), characterized in that: the bottom fixedly connected with slips body (101) of joint (1), the bottom activity of slips body (101) has cup jointed cone (103), seal assembly (102) have been cup jointed in the activity of the top in cone (103) outside, the bottom fixedly connected with bottom mounting (2) of cone (103), movable groove (21) have been seted up to the bottom in bottom mounting (2) outside, the inboard fixedly connected with cylinder piece (22) of movable groove (21), the activity cup joints fly leaf (3) in the outside of cylinder piece (22), gyro wheel groove (31) have been seted up to the other end of fly leaf (3), the inboard fixedly connected with cylinder piece (32) of gyro wheel groove (31), the outside activity cup joints movable gyro wheel (301) in cylinder piece (32) No. two, the bottom fixedly connected with fixed block (201) No. one, the inboard fixedly connected with fixed rod (202) of No. one, the outside activity pipe (203) of No. one fixed rod (202) No. two, no. two cylinder pieces (203) have the inside flexible pipe (203) of No. two, no. 3 flexible pipe (204) are cup jointed in the outside of cylinder piece (31), the inside fixedly connected with No. two dead levers (303) of No. two fixed blocks (302), the outside of No. two dead levers (303) cup joints with the activity of the other end of No. two telescopic links (204).

2. A soluble bridge plug for an oil and gas well seal according to claim 1, wherein: the middle fixedly connected with fixed cylinder (4) of bottom mounting (2) bottom, the bottom fixedly connected with cylinder pipe (401) in the outside of fixed cylinder (4), the inboard activity of cylinder pipe (401) has cup jointed telescopic link (402) No. one, the other end fixedly connected with fixed plate (403) of telescopic link (402), the fixed surface of fixed plate (403) is connected with cleaning brush (404).

3. A soluble bridge plug for an oil and gas well seal according to claim 2, wherein: one end of the first cylindrical tube (401) close to the fixed cylinder (4) is higher than one end far away from the fixed cylinder (4).

4. A soluble bridge plug for an oil and gas well seal according to claim 2, wherein: the cleaning brush (404) is made of polypropylene.

5. A soluble bridge plug for an oil and gas well seal according to claim 1, wherein: the inside fixedly connected with spring (231) No. two cylinder pipes (203), the other end of spring (231) and telescopic link (204) fixed connection No. two.

6. A soluble bridge plug for an oil and gas well seal according to claim 2, wherein: the inner side of the first cylindrical tube (401) is fixedly connected with a second spring (411), and the other end of the second spring (411) is fixedly connected with a first telescopic rod (402).