CN212671681U

CN212671681U - Reducing hydraulic blocking tool

Info

Publication number: CN212671681U
Application number: CN202021523685.5U
Authority: CN
Inventors: 不公告发明人
Original assignee: Jiangtian Technology Co ltd
Current assignee: Jiangtian Technology Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-03-09
Anticipated expiration: 2030-07-28

Abstract

The utility model provides a reducing hydraulic blocking tool. Relates to the field of oil field downhole tools. The lower part of the body is connected with a thrust body, a piston is arranged between the outer circle of the thrust body and the body, expansion blocks are uniformly distributed on the circumference of the lower part of the piston, the shape of the inner surface of each expansion block is the same as that of the two conical surfaces, and a rubber cylinder is vulcanized outside each expansion block. The utility model discloses following beneficial effect has: through setting up the inside expansion piece that can outwards expand that has of packing element, the diameter inflation degree that can make the packing element is greater than the elastic deformation of rubber self, can block up the sleeve pipe at bigger diameter scope, and simultaneously, the effect of being close to of expansion piece from top to bottom, also make the packing element have a shrink deformation in width direction, two elastic deformation superposes together, the expandable range of the diameter of packing element has further been improved, improve sealing performance simultaneously, so the structure can be done very little with the blanking plug diameter, the dirt layer in the accessible sleeve pipe, adaptability is better.

Description

Reducing hydraulic blocking tool

The technical field is as follows:

the utility model belongs to the technical field of the oil field instrument technique in the pit and specifically relates to a reducing water conservancy blocks up instrument.

Background art:

before the pressurized workover of the water injection well, the interior of an oil pipe needs to be plugged in advance, the pressure in the oil pipe needs to be sealed, then the oil pipe lifting operation is realized by matching a pressurized operation machine and a workover rig, the traditional plugging device is only suitable for plugging the unobstructed oil pipe in the oil pipe, and the traditional plugging device can be suitable for plugging the oil pipe with a small diameter when the oil pipe with a large diameter is penetrated underground, but can not be plugged when the oil pipe with a large diameter is plugged by the oil pipe with a small diameter;

after the oil pipe is used for a long time, the inner wall is often stained with thicker dirt, the conventional plug cannot pass through the scaling section when the thickness of the dirt reaches a certain degree, and if the diameter of the body of the conventional plug is reduced too much, reliable setting cannot be realized in the oil pipe.

The utility model has the following contents:

in order to solve the problem, the utility model provides a reducing hydraulic blocking tool.

The technical scheme of the utility model is that: a reducing hydraulic blocking tool comprises a body, wherein an upper joint is arranged at the upper part of the body, the lower part of the body is connected with a thrust body in a sealing manner through threads, a piston is arranged between an outer cylinder of a shaft at the lower part of a threaded shaft of the thrust body connection body and an inner hole at the lower part of the body, and the piston is in clearance fit connection with the body and the thrust body through a sealing ring;

the lower part of the piston is a conical surface with a downward reduced diameter, a thrust body at the lower part of the conical surface is a conical surface with a larger diameter, eight expansion blocks which are uniformly distributed on the circumference are arranged at the positions of the two conical surfaces, the shape of the inner surface of each expansion block is the same as that of the two conical surfaces, and a rubber cylinder is vulcanized outside each expansion block;

an upper central hole is formed in an upper connector of the body, a lower central hole is formed in the upper part of the thrust body, the upper central hole is communicated with the lower central hole, and a liquid inlet hole is formed in the hole wall of the lower central hole and is communicated with the bottom space of the piston;

the lower part of the piston is provided with a unidirectional tooth socket on the inner hole of the piston, the corresponding position of the unidirectional tooth socket is provided with a unidirectional tooth ring on the cylindrical surface of the thrust body.

And at the gap position of the two expansion blocks, a stress groove extending outwards is formed on the inner hole wall of the rubber cylinder.

Each expansion block is divided into an upper part and a lower part, a space which is close to each other in the vertical direction is reserved between the expansion blocks of the upper part and the lower part, and a deformation groove is formed outwards at the position of a rubber cylinder of the space.

The utility model discloses following beneficial effect has: through setting up the inside expansion piece that can outwards expand that has of packing element, the diameter inflation degree that can make the packing element is greater than the elastic deformation of rubber self, can block up the sleeve pipe at bigger diameter scope, and simultaneously, the effect of being close to of expansion piece from top to bottom, also make the packing element have a shrink deformation in width direction, two elastic deformation superposes together, the expandable range of the diameter of packing element has further been improved, improve sealing performance simultaneously, so the structure can be done very little with the blanking plug diameter, the dirt layer in the accessible sleeve pipe, adaptability is better.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1.

In the figure, 1-a body, 2-an upper joint, 3-a piston, 4-an expansion block, 5-a rubber cylinder, 6-a thrust body, 7-a one-way toothed ring, 8-a one-way toothed groove, 9-a lower central hole, 10-a liquid inlet hole, 11-an upper central hole, 12-a stress groove and 13-a deformation groove.

The specific implementation mode is as follows:

the present invention will be further explained with reference to the accompanying drawings:

as shown in a figure 1 and a figure 2, the reducing hydraulic blocking tool comprises a body 1, wherein an upper joint 2 is arranged at the upper part of the body 1, the lower part of the body 1 is connected with a thrust body 6 in a sealing manner through threads, a piston 3 is arranged between an outer cylinder of a shaft at the lower part of a threaded shaft of the thrust body 6, which is connected with the body 1, and an inner hole at the lower part of the body 1, and the piston 3 is in clearance fit connection with the body 1 and the thrust body 6 through a sealing ring;

the lower part of the piston 3 is a conical surface with the diameter decreasing downwards, a thrust body 6 at the lower part of the conical surface is a conical surface with the diameter increasing, eight expansion blocks 4 which are uniformly distributed on the circumference are arranged at the positions of the two conical surfaces, the inner surface of each expansion block 4 is the same as the two conical surfaces, and a rubber cylinder 5 is vulcanized outside each expansion block 4;

an upper central hole 11 is arranged in the upper joint 2 of the body 1, a lower central hole 9 is arranged at the upper part of the thrust body 6, the upper central hole 11 is communicated with the lower central hole 9, and a liquid inlet hole 10 is formed in the hole wall of the lower central hole 9 and is communicated with the bottom space of the piston 3;

the lower part of the piston 3 is provided with a unidirectional tooth socket 8 on the inner hole of the piston 3, the corresponding position of the unidirectional tooth socket 8 is provided with a unidirectional tooth ring 7 on the cylindrical surface of the thrust body 6.

At the clearance position of two expansion blocks 4, open on the wall of rubber tube 5 inner bore and have stress groove 12 of outside extension, stress groove 12 can provide sufficient deflection for rubber tube 5 when the expansion block opens, makes it elastic deformation more even, and rubber tube 5 diameter enlarges and hugs closely comprehensively and play the jam effect at the cover inside pipe wall.

The expansion blocks 4 are divided into an upper expansion block 4 and a lower expansion block 4, a space which is close to each other in the vertical direction is reserved between the expansion blocks 4 of the upper expansion block and the lower expansion block, a deformation groove 13 is formed in the position of a rubber cylinder 5 in the space outwards, when the expansion blocks are in practical use, pressure liquid enters a piston 3 through a liquid inlet hole 10, the piston 3 descends to push the upper expansion block and the lower expansion block 4 to be close to each other and simultaneously outwards expand, the rubber cylinder 5 outwards generates elastic deformation under the action of the expansion blocks 4 which are close to each other in the vertical direction, the expansion blocks 4 which can be outwards expanded are arranged in the rubber cylinder 5, the diameter expansion degree of the rubber cylinder 5 can be larger than the elastic deformation of rubber per se, a sleeve can be blocked in a larger diameter range, meanwhile, the upper expansion block and the lower expansion block 4 are close to each other, the rubber cylinder 5 also has a contraction deformation in the width direction, and the two, the diameter of the rubber cylinder 5 can be expanded, the sealing performance is improved, the diameter of the blanking plug can be made very small through the structure, and the adaptive performance is better through a dirt layer in the sleeve.

Claims

1. A reducing hydraulic plugging tool comprises a body (1), and is characterized in that: the upper part of the body (1) is provided with an upper joint (2), the lower part of the body (1) is hermetically connected with a thrust body (6) through threads, a piston (3) is arranged between an outer cylinder of a shaft at the lower part of a threaded shaft of the thrust body (6) connected with the body (1) and an inner hole at the lower part of the body (1), and the piston (3) is in clearance fit connection with the body (1) and the thrust body (6) through a sealing ring;

the lower part of the piston (3) is a conical surface with a downward reduced diameter, the thrust body (6) at the lower part of the conical surface is a conical surface with a larger diameter, eight expansion blocks (4) which are uniformly distributed on the circumference are arranged at the positions of the two conical surfaces, the inner surface of each expansion block (4) is the same as the two conical surfaces, and a rubber cylinder (5) is vulcanized outside each eight expansion block (4);

an upper central hole (11) is formed in an upper connector (2) of the body (1), a lower central hole (9) is formed in the upper portion of the thrust body (6), the upper central hole (11) is communicated with the lower central hole (9), and a liquid inlet hole (10) is formed in the hole wall of the lower central hole (9) and is communicated with the bottom space of the piston (3);

the lower part of the piston (3) is provided with a unidirectional tooth socket (8) on the inner hole of the piston (3), the corresponding position of the unidirectional tooth socket (8) is provided with a unidirectional tooth ring (7) on the cylindrical surface of the thrust body (6).

2. The variable diameter hydraulic plugging tool of claim 1, wherein: at the gap position of the two expansion blocks (4), the inner hole wall of the rubber cylinder (5) is provided with a stress groove (12) extending outwards.

3. The variable diameter hydraulic plugging tool of claim 1, wherein: each expansion block (4) of the expansion blocks (4) is divided into an upper part and a lower part, a space which is close to each other in the vertical direction is reserved between the expansion blocks (4) of the upper part and the lower part, and a deformation groove (13) is formed outwards in the position of a rubber cylinder (5) of the space.