CN110821440A - Packer - Google Patents

Abstract

The invention discloses a packer, which comprises a packer body, a first fixing assembly, a second fixing assembly and a control assembly, wherein a circulation pipeline is arranged in the packer body; the first fixing assembly comprises a sliding block and a slip, a first adjusting cavity is formed in the packer body, a third through hole communicated with the first adjusting cavity is formed in the packer body, the first adjusting cavity is communicated with the circulation pipeline through the third through hole, the sliding block is arranged in the first adjusting cavity in an embedded mode, a first sliding groove communicated with the first adjusting cavity is formed in the outer wall of the packer body, the sliding block is connected with the first sliding groove in a sliding mode, one end, far away from the packer body, of the sliding block is connected with the slip, and the moving direction of the slip is perpendicular to the axial direction of the packer body; the second fixing component comprises a rubber cylinder; the control assembly is connected in a flow pipeline of the packer body in a sliding manner; the problem of adopt transition fit's mode between packer and the pipeline among the prior art, the oil leak can appear in the too big oil pressure even cause the incident is solved.

Description

Packer

Technical Field

The invention relates to the technical field of packers applied to oil fields in the well, in particular to a packer.

Background

In oil field development, a packer is one of the main downhole tools for performing injection and production process operations such as separate-zone oil production, separate-zone water injection, separate-zone fracturing or acidizing, mechanical blocking and water plugging and the like.

The mode that current packer adopted transition fit mostly installs the packer in the pipeline, however when the pressure of oil inlet one end was too big, the pressure that the packing element can bear was limited, leads to the packer to take place to rock for the pipeline, leads to the leakage of fluid, and application scope is limited, if the oil pressure is too big, can appear sealing the phenomenon of the good oil leak of effect, and the packer is malfunctioning even, causes the incident.

Disclosure of Invention

The invention aims to overcome the technical defects, provides a packer and solves the problems that in the prior art, a transitional fit mode is adopted between the packer and a pipeline, the oil pressure born by the packer is limited, and oil leakage occurs even safety accidents occur due to too high oil pressure.

In order to solve the technical problem, the invention provides a packer which comprises a packer body, a first fixing assembly, a second fixing assembly and a control assembly, wherein a circulation pipeline is arranged in the packer body; the first fixing assembly comprises a sliding block and a slip, a first adjusting cavity is formed in the packer body, a third through hole communicated with the first adjusting cavity is formed in the packer body, the first adjusting cavity is communicated with the circulation pipeline through the third through hole, the sliding block is arranged in the first adjusting cavity, a first sliding groove communicated with the first adjusting cavity is formed in the outer wall of the packer body, the sliding block is connected with the first sliding groove in a sliding mode, one end, far away from the packer body, of the sliding block is connected with the slip, and the moving direction of the slip is perpendicular to the axial direction of the packer body; the second fixing component comprises a rubber cylinder, and the rubber cylinder is extruded by oil pressure to deform and is abutted against the inner wall of the pipeline; the control assembly is connected in a flow pipeline of the packer body in a sliding mode and controls the flow pipeline and the first adjusting cavity to be switched on and off.

The invention has the beneficial effects that: different from the situation of the prior art, the packer is provided with the first fixing assembly, when the control assembly moves to the circulation pipeline to be communicated with the first adjusting cavity, liquid enters the first adjusting cavity and extrudes the sliding block, so that the sliding block drives the slip to move towards the direction vertical to the axis of the packer body, the slip is firmly propped against the inner wall of the pipeline, the stability of connection between the packer and the pipeline is enhanced in the packing process, the packer can bear higher pressure, and the application range is wider.

Drawings

FIG. 1 is a schematic structural view of the packer body of the present invention;

FIG. 2 is a schematic structural view of the control assembly of the present invention;

FIG. 3 is a schematic structural view of a first fixing assembly of the present invention;

fig. 4 is a schematic structural view of a second fixing assembly of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The invention provides a packer, which comprises apacker body 100, afirst fixing assembly 300, a second fixing assembly 400 and acontrol assembly 200, wherein in implementation, acirculation pipeline 140 is arranged in thepacker body 100, when liquid flows into thecirculation pipeline 140, the liquid is communicated with thefirst fixing assembly 300 under the action of thecontrol assembly 200 to extrude thefirst fixing assembly 300, so that the telescopic end of thefirst fixing assembly 300 is firmly propped against the inner wall of a pipeline, and similarly, under the action of thecontrol assembly 200, the liquid is communicated with the second fixing assembly 400 to extrude the second fixing assembly 400, so that the second fixing assembly 400 is firmly propped against the inner wall of the pipeline in a deformation manner, and the packer is firmly fixed on the inner wall of the pipeline, and the following description is given in more detail.

As shown in fig. 1, thepacker body 100 in this embodiment includes apipe body 110, anupper joint 120 and alower joint 130, two ends of thepipe body 110 are detachably connected to theupper joint 120 and thelower joint 130, respectively, and an inside of theupper joint 120, an inside of thepipe body 110 and an inside of thelower joint 130 are sequentially communicated to form acirculation line 140.

As shown in fig. 3, thefirst fixing assembly 300 in this embodiment includes asliding block 310 and aslip 320, thepacker body 100 has afirst adjusting chamber 131 therein, thepacker body 100 is provided with a third throughhole 133 communicated with thefirst adjusting chamber 131, thefirst adjusting chamber 131 is communicated with thecirculation line 140 through the third throughhole 133, thesliding block 310 is disposed in thefirst adjusting chamber 131, the outer wall of thepacker body 100 is provided with a first slidinggroove 132 communicated with thefirst adjusting chamber 131, thesliding block 310 is connected with the firstsliding groove 132 in a sliding manner, one end of thesliding block 310 away from thepacker body 100 is connected with theslip 320, and a moving direction of theslip 320 is perpendicular to an axial direction of thepacker body 100.

A pressure relief hole 412 is formed in the limiting cylinder 410, and the pressure relief hole 412 communicates the outside with the second adjusting cavity 411.

Preferably, the number of thefirst fixing assemblies 300 may be multiple, and a plurality of thefirst fixing assemblies 300 are uniformly arranged along the circumference of thepacker body 100.

Specifically, the first adjustingcavity 131 is annular, thesliding block 310 is boss-shaped, the end with the larger diameter of the slidingblock 310 slides in the first adjustingcavity 131, and the end with the smaller diameter of the slidingblock 310 slides in the firstsliding groove 132.

As shown in fig. 2, thecontrol assembly 200 in this embodiment is slidably coupled to theflow line 140 of thepacker body 100 and controls the opening and closing of theflow line 140 to thefirst adjustment chamber 131.

Specifically, the control assembly 200 is arranged in the circulation line 140, the control assembly 200 includes a fixed cylinder 210, a central body 220, a first limit spring 230, a limit ball 240, a port sleeve 250, a pin 260 and a second limit spring 270, the fixed cylinder 210, the central body 220, the first limit spring 230, the port sleeve 250 and the second limit spring 270 are coaxially arranged along the length direction of the circulation line 140, the central body 220 is arranged in the fixed cylinder 210, the first limit spring 230 is positioned on one side of the central body 220 away from the inlet of the packer body 100, one end of the first limit spring 230 abuts against the central body 220, the other end of the first limit spring 230 abuts against the inner wall of the packer body 100, the limit ball 240 is arranged in the central body 220, the limit ball 240 abuts against a protrusion 221 on one side of the central body 220 away from the opening of the packer body 100, the port sleeve 250 is sleeved on the outer wall of the fixed cylinder 210, the outer wall of the port sleeve 250 is connected with the inner, the clearance between the fixed barrel 210 and the packer body 100 is divided into a control cavity 280 and an installation cavity 290 by the eyelet sleeve 250, the control cavity 280 is arranged close to an inlet of the packer body 100 and communicated with the circulation pipeline 140 through a first through hole 211 formed in the fixed barrel 210, the second limiting spring 270 is sleeved on the fixed barrel 210 and positioned in the installation cavity 290, one end of the second limiting spring 270 is connected with the eyelet sleeve 250, and the other end of the second limiting spring 270 is abutted against the fixed barrel 210.

Preferably, the outer wall of thecentral body 220 and one end of thepin 260 are embedded in a mounting hole formed in theport sleeve 250, and the other end of thepin 260 is embedded in a mounting hole formed in thepacker body 100, so that when one side of theport sleeve 250 is subjected to excessive pressure, thepin 260 is broken, theport sleeve 250 extrudes the second limitingspring 270, and the inlet of the check valve 440 is communicated with thecontrol chamber 280.

Preferably, the number ofpins 260 is a plurality of, and a plurality ofpins 260 are evenly arranged along the circumference ofport sleeve 250, and the inner wall ofport sleeve 250 is abutted with fixedcylinder 210, and the outer wall ofport sleeve 250 is abutted with the inner wall ofpacker body 100, and it can be understood that the number ofpins 260 is decided according to specific conditions, and specifically, when limitingball 240 receives a certain pressure and needs to be cut off, pins 260 will be broken, and the number ofpins 260 is to satisfy the requirement of the above pressure.

As shown in fig. 4, the packer in this embodiment further includes a second fixing assembly 400, the second fixing assembly 400 includes a limiting cylinder 410, two sliding sleeves 420, two rubber sleeves and a one-way valve 440, the limiting cylinder 410, the two sliding sleeves 420 and the two rubber sleeves are all sleeved in a second sliding groove 110 formed on the outer wall of the packer body 100, the two sliding sleeves 420 are symmetrically disposed on two sides of the limiting cylinder 410, the two rubber sleeves are symmetrically disposed on two sides of the limiting cylinder 410, one end of the sliding block 310 is located in a gap between the limiting cylinder 410 and the packer body 100, the outer wall of the sliding block 310 is slidably connected with the limiting cylinder 410, the inner wall of the sliding block 310 is slidably connected with the outer wall of the packer body 100, the opposite side of the sliding block 310, the inner wall of the limiting cylinder 410 and the outer wall of the packer body 100 form a second adjusting cavity 411, the other end of the sliding block 310 is abutted to the rubber sleeves, one side of, the second adjusting cavity 411 is communicated with the flow pipe 140 through the check valve 440, and the flow direction flows from the flow pipe 140 to the second adjusting cavity 411, the second adjusting cavity 411 is annular, and the second sliding groove 110 is annular.

Preferably, the limiting cylinder 410 is provided with a pressure relief hole 412, and the pressure relief hole 412 communicates the outside with the second adjusting cavity 411, so as to facilitate the resetting of the rubber cylinder.

It will be appreciated that the vertical distance from thesecond throughbore 222 to the end of thecenterbody 220 adjacent the opening of thepacker body 100 is less than the vertical distance from thethird throughbore 133 to the check valve 440, and that the second modulation chamber 411 is in communication with theflow line 140 when thefirst modulation chamber 131 is in communication with theflow line 140.

The working process is as follows: when a pipeline needs to be sealed, the packer is placed in the pipeline and is in transition fit with the pipeline, a soluble limiting ball 240 is put into the pipe body 110, the limiting ball 240 blocks the central body 220, one end of the central body 220 is under the pressure of liquid, the other end of the central body 220 extrudes the first limiting spring 230 until the central body 220 moves to the position where the second through hole 222 faces the third through hole 133, the inside of the central body 220 is communicated with the first adjusting cavity 131, the oil enters the first adjusting cavity 131 and extrudes the slider 310, the slider 310 is pushed to drive the slip 320 connected with the slider 310 to move towards the direction perpendicular to the pipe body 110 and far away from the pipe body 110 until the slip 320 is abutted against the inner wall of the pipeline, so that primary fixing is realized, at the moment, the liquid enters the control cavity 280 through the first through hole 211, the pressure of the control cavity 280 is continuously increased until the pin 260 breaks, the water eye sleeve 250 extrudes the, until the check valve 440 is communicated with the control cavity 280, liquid enters the second adjusting cavity 411 to extrude the two sliding sleeves 420 to move back to back, so that the two rubber cylinders are extruded to deform and abut against the inner wall of the pipeline, and the function of separation is realized.

Different from the situation of the prior art, by arranging thefirst fixing assembly 300, when thecontrol assembly 200 moves to thecommunication pipeline 140 and is communicated with the first adjustingcavity 131, liquid enters the first adjustingcavity 131 and extrudes the slidingblock 310, so that the slidingblock 310 drives theslip 320 to move towards the direction vertical to the axis of thepacker body 100, and the slip firmly props against the inner wall of a pipeline, thereby enhancing the stability of connection between the packer and the pipeline in the packing process, bearing larger pressure and having wider application range.

It should be noted that the above embodiments belong to the same inventive concept, and the description of each embodiment has a different emphasis, and reference may be made to the description in other embodiments where the description in individual embodiments is not detailed.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A packer, comprising:

the packer comprises a packer body, wherein a circulation pipeline is arranged in the packer body;

the first fixing assembly comprises a sliding block and a slip, a first adjusting cavity is formed in the packer body, a third through hole communicated with the first adjusting cavity is formed in the packer body, the first adjusting cavity is communicated with the circulation pipeline through the third through hole, the sliding block is arranged in the first adjusting cavity, a first sliding groove communicated with the first adjusting cavity is formed in the outer wall of the packer body, the sliding block is connected with the first sliding groove in a sliding mode, one end, far away from the packer body, of the sliding block is connected with the slip, and the moving direction of the slip is perpendicular to the axial direction of the packer body;

the second fixing assembly comprises a rubber cylinder, and the rubber cylinder is extruded by oil pressure to deform and is abutted against the inner wall of the pipeline;

and the control assembly is connected in the flow pipeline of the packer body in a sliding manner and controls the flow pipeline and the first adjusting cavity to be switched on and off.

2. The packer of claim 1, wherein the packer body comprises a pipe body, an upper joint and a lower joint, two ends of the pipe body are detachably connected with the upper joint and the lower joint respectively, and the inside of the upper joint, the inside of the pipe body and the inside of the lower joint are communicated in sequence to form the circulation pipeline.

3. The packer of claim 1, wherein the control assembly is disposed in the circulation line, the control assembly comprises a fixed cylinder, a central body, a first limiting spring, a limiting ball, a port sleeve, a pin, and a second limiting spring, the fixed cylinder, the central body, the first limiting spring, the port sleeve, and the second limiting spring are coaxially disposed along a length direction of the circulation line, the central body is disposed in the fixed cylinder, the first limiting spring is disposed on a side of the central body away from an inlet of the packer body, one end of the first limiting spring abuts against the central body, the other end of the first limiting spring abuts against an inner wall of the packer body, the limiting ball is disposed in the central body, the limiting ball abuts against a protrusion of the central body away from an opening of the packer body, the water hole sleeve is sleeved on the outer wall of the fixed cylinder, the outer wall of the water hole sleeve is connected with the inner wall of the packer body through the pin, the water hole sleeve is used for connecting the fixed cylinder with a gap between the packer body and is divided into a control cavity and an installation cavity, the control cavity is close to the inlet of the packer body and is communicated with the circulation pipeline through a first through hole formed in the fixed cylinder, the second limiting spring is sleeved on the fixed cylinder and is located in the installation cavity, one end of the second limiting spring is connected with the water hole sleeve, and the other end of the second limiting spring is abutted to the fixed cylinder.

4. A packer as claimed in claim 3, in which the outer wall of the central body and one end of the pin are embedded in a mounting hole provided in the port sleeve, and the other end of the pin is embedded in a mounting hole provided in the packer body.

5. A packer as claimed in claim 3, wherein the number of pins is plural, the plural pins are arranged uniformly along the circumference of the port sleeve, the inner wall of the port sleeve abuts against the fixed barrel, and the outer wall of the port sleeve abuts against the inner wall of the packer body.

6. The packer of claim 1, wherein the second fixing assembly further comprises two limiting barrels, two sliding sleeves and a one-way valve, the number of the rubber barrels is two, the limiting barrels, the two sliding sleeves and the two rubber barrels are all sleeved in a second sliding groove formed in the outer wall of the packer body, the two sliding sleeves are symmetrically arranged on two sides of the limiting barrel, the two rubber barrels are symmetrically arranged on two sides of the limiting barrel, one end of a sliding block is located in a gap between the limiting barrel and the packer body, the outer wall of the sliding block is slidably connected with the limiting barrel, the inner wall of the sliding block is slidably connected with the outer wall of the packer body, the opposite side of the sliding block, the inner wall of the limiting barrel and the outer wall of the packer body form a second adjusting cavity, and the other end of the sliding block abuts against the rubber barrels, one side that the packing element kept away from the slider with the second spout butt, the second is adjusted the chamber and is passed through the check valve with the circulation pipeline intercommunication, and the flow direction by the circulation pipeline flow direction second is adjusted the chamber, the second is adjusted the chamber and is cyclic annular, the second spout is cyclic annular.

7. A packer as claimed in claim 1, wherein the first fixing elements are provided in a plurality, the plurality being circumferentially uniform along the packer body.

8. A packer as claimed in claim 1, wherein the first chamber is annular and the slide is in the form of a boss, the larger diameter end of the slide sliding in the first chamber and the smaller diameter end of the slide sliding in the first chute.

9. The packer of claim 6, wherein the limiting cylinder is provided with a pressure relief hole, and the pressure relief hole communicates the outside with the second adjusting cavity.

10. A packer as claimed in claim 1, wherein the slips are provided with a plurality of parallel prismatic dogs on the side remote from the packer body.

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