CN211549642U

CN211549642U - High pressure resistant packer for setting on casing

Info

Publication number: CN211549642U
Application number: CN201922337845.0U
Authority: CN
Inventors: 潘叶信; 吴金枝
Original assignee: Weiqixin Petroleum Machinery Tianjin Co ltd
Current assignee: Bazhou Feilang Energy Technology Co.,Ltd.
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-09-22
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a high pressure resistant packer for setting on a sleeve, wherein a first sealing component, a first clamping component, a second sealing component, a second clamping component, a first locking mechanism, a second locking mechanism and a deblocking mechanism are arranged on an upper central tube and a lower central tube; the ball seat is fixed with the main channel through the shear pin, the steel ball is contained in the ball seat, the ball seat sleeve is arranged on the ball seat, and the ball seat sleeve is locked with the inner wall of the main channel through the locking block. Through passing pressure hole transmission pressure, make locking mechanical system along center tube rebound, first seal assembly, it props to block the sleeve pipe to sit the card subassembly, second seal assembly struts to separate into epicoele and lower chamber with the sleeve pipe, through steel ball and ball seat cooperation, realize suppressing the pressure of the tubular column part more than the ball seat cover, make the packer realize sitting and seal, drop into the steel ball into the ball seat during the deblocking, it makes the ball seat give up to beat to press, ball seat cover and locking piece can be along with the ball seat whereabouts, support the part downstream on the packer because of losing the locking piece, slips and packing element retract, realize safe and reliable's deblocking.

Description

High pressure resistant packer for setting on casing

Technical Field

The utility model relates to an oil field oil recovery technical field, concretely relates to high pressure resistant packer for setting on the sleeve pipe.

Background

A packer is a downhole tool having an elastomeric sealing element and thereby packing the annular space between the string and the wellbore and between the strings, isolating the producing zone to control production and protect the casing. In the oil extraction engineering, an oil extraction channel is designed on the packer, and when setting, the piston sleeve moves upwards and the oil extraction channel is opened; after the setting, the upper layer pressure acts on the balance piston to push the rubber cylinder upwards, so that the deblocking pin is prevented from shearing force; when the oil extraction channel is unsealed, the unsealing pin is cut off by the friction force between the rubber sleeve and the sleeve, and the piston sleeve moves downwards to close the oil extraction channel. The water plugging construction process of the oil well packer is reduced, the well killing and blowout preventing operation can be conveniently realized, the high pressure can be borne in two directions, and the service life is long.

Current high pressure resistant packer, in order to improve the compressive property, often adopt the deblocking shear pin to control the packer deblocking, because the deblocking power is great, make the deblocking shear pin be difficult for cutting, and because the existence of sand, the packing element can be followed the empty upset that flows of sealing ring, the deblocking power is big more, and this kind of phenomenon is just more serious, can lead to the packing element to damage and block dead packer, the problem that can not kick-back, block well appears during the deblocking.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical defects, the utility model adopts the technical scheme that a high pressure resistant packer for setting on a sleeve is provided, which comprises an upper central tube and a lower central tube which are connected by screw thread, wherein the upper central tube and the lower central tube are sequentially provided with a first sealing assembly, a first clamping assembly, a second sealing assembly, a second clamping assembly, a first locking mechanism, a second locking mechanism and a deblocking mechanism;

the upper central pipe and the lower central pipe are provided with a main channel which is communicated with each other, the main channel is provided with a first pressure transmission hole and a second pressure transmission hole, the first pressure transmission hole is used for transmitting the pressure of the central pipe to the first locking mechanism, the second pressure transmission hole is used for transmitting the pressure of the central pipe to the second locking mechanism, so that the first locking mechanism and the second locking mechanism extrude the first sealing assembly when moving upwards along the length direction of the central pipe, the first sealing assembly props open the upper end of the supporting sleeve, the first clamping assembly props open the upper end of the clamping sleeve, the second sealing assembly props open the sleeve to be divided into an upper cavity and a lower cavity, and the second clamping assembly props open the lower end of the clamping sleeve;

deblocking mechanism includes ball seat, steel ball and ball seat cover, the inner wall threaded connection of ball seat and main entrance to it is fixed through first shear pin, the steel ball holding is in the ball seat, the ball seat ways is established in the upper end of ball seat and is spacing with it cooperation, the inner wall locking of ball seat cover through locking piece and main entrance.

Furthermore, a pressure relief sleeve is arranged in the lower joint, and an oil drainage channel communicated with the pressure relief sleeve is arranged on the ball seat.

Further, first seal assembly establishes adjustable ring, foraminiferous packing element, adapter sleeve and the adjustment cover on last center tube including the cover in proper order, the adjustable ring is fixed with the outer wall of last center tube, the adapter sleeve is spacing with the outer wall cooperation of adjustment cover.

Furthermore, the first clamping component comprises an upper cone sleeved on the upper central pipe, an upper clamping tile is installed between the adjusting sleeve and the upper cone through a first clamping tile sleeve and a first spring piece, the upper end of the upper cone is fixed with the first clamping tile sleeve through a second shear pin, and the first clamping tile sleeve is matched with the outer wall of the adjusting sleeve in a limiting mode.

Further, the second sealing assembly comprises an upper rubber cylinder, a middle rubber cylinder and a lower rubber cylinder which are sequentially sleeved on the upper central pipe, and the upper rubber cylinder is abutted to the upper cone.

Furthermore, the second clamping component comprises a lower cone and a second slip sleeve which are sleeved on the upper central pipe, a lower slip and a second spring piece are arranged between the lower cone and the second slip sleeve, and the lower end of the lower cone is fixed with the second slip sleeve through a third shear pin.

Further, first locking mechanism includes thrust piston, piston bush, the thrust piston bush is established on last center tube, just the outer wall of thrust piston upper end is spacing with the inner wall cooperation of second slip cover, the inner wall of piston bush upper end is spacing and fixed with the outer wall cooperation of thrust piston, the middle part cover of piston bush is established and is fixed on center tube down, be equipped with between thrust piston and the piston bush with the communicating first pressure chamber of first pressure transmission hole.

Further, the second locking mechanism comprises a lock sleeve, a middle piston, a lower cylinder sleeve and a lower piston, the middle piston and the lower piston are arranged on the lower central tube in a sleeved mode, the upper end of the middle piston is fixed to the inner wall of the piston sleeve, the inner wall of the upper end of the lock sleeve is matched with the outer wall of the piston sleeve in a limiting mode and fixed through a fifth shear pin, the lock sleeve is sleeved on the middle piston, a second lock ring is arranged between the lock sleeve and the middle piston, the lock sleeve and the second lock ring are fixed through a sixth shear pin, the lower cylinder sleeve is sleeved outside the middle piston in a sliding mode, the upper end of the lower cylinder sleeve is fixed to the outer wall of the lower end of the lock sleeve, the lower end of the lower cylinder sleeve is matched with the outer wall of the lower piston in a limiting mode and fixed, and a second pressure inlet cavity communicated with the second pressure.

Furthermore, be equipped with first spacing groove and first locating piece on the outer wall of going up the center tube, it is equipped with the key to slide in the first spacing groove, the inner wall of adjusting collar is equipped with the first annular space that is used for limiting the removal stroke of key to and be used for restricting the second annular space of the removal stroke of first locating piece.

Furthermore, a limiting ring and a first locking ring which are sleeved on the upper central pipe are arranged between the lower rubber cylinder and the lower cone, and the lower cone and the first locking ring are fixed through a fourth shear pin.

Compared with the prior art the utility model discloses technical scheme's beneficial effect does:

1. the utility model provides a high pressure resistant packer for setting on sleeve pipe, through setting up the steel ball and ball seat cooperation, the locking piece circumference sets up on lower center tube, and the ball seat cover is locked through locking piece and main duct inner wall, and the steel ball that cooperates the input realizes suppressing the pressure to the tubular column part above the ball seat cover, makes the packer realize the setting; when needing the deblocking drop into ball seat 91 with the steel ball, suppress and make the ball seat release, ball seat cover and locking piece can fall along with the ball seat, and the outside part of packer loses the support downstream of locking piece, and slips and packing element retract, and safe and reliable can satisfy different well conditions and different oil recovery technology requirements, compares with the packer of other same specifications, and the internal diameter can be processed bigger, increases the oil production volume.

2. The first pressure transmission hole and the second pressure transmission hole are used for transmitting pressure, so that the first sealing assembly is extruded when the first locking mechanism and the second locking mechanism move upwards along the length direction of the central pipe, the first sealing assembly supports the upper end of the supporting sleeve, and sand in the upper sleeve is prevented from falling to influence the normal work of the packer; the second seal assembly struts the casing into two parts, namely an upper cavity and a lower cavity, so that the packer can be used in a well with higher pressure.

3. The first clamping component is used for expanding the upper end of the clamping sleeve, the second clamping component is used for expanding the lower end of the clamping sleeve, the packer is prevented from sliding upwards due to the increase of the annular pressure of the lower cavity, the packer is locked up and down simultaneously, the reliability of setting is improved, the mode of the perforated rubber cylinder-upper slip-rubber cylinder-lower slip is adopted, the slips can be prevented from being buried by sediments or other impurities falling from the upper part of the sleeve, and the sealing stability of the rubber cylinder of the packer in the sleeve is improved.

4. Through setting up pressure release cover and draining passageway intercommunication, prevent that ball seat cover and locking piece and ball seat from falling the shaft bottom after the product deblocking from causing the pollution, when lifting the tubular column after the packer deblocking, liquid discharges through draining passageway in the oil pipe.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a partial cross-sectional view of a high pressure resistant packer provided by an embodiment of the present invention for setting on a casing;

FIG. 2 is an enlarged view of a portion of the cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view of the lower portion of the cross-sectional view of FIG. 1;

fig. 4 is a partial cross-sectional view of a deblocking mechanism provided in accordance with an embodiment of the present invention;

fig. 5 is a partial cross-sectional view of a first seal assembly provided by an embodiment of the present invention;

fig. 6 is a partial cross-sectional view of a second card seating assembly and a first locking mechanism provided by an embodiment of the invention;

fig. 7 is a partial cross-sectional view of a second locking mechanism provided by an embodiment of the present invention.

Wherein the reference numerals are:

1. upper center tube, 2, lower center tube, 3, first seal assembly, 31, adjusting ring, 32, perforated rubber cylinder, 33, connecting sleeve, 34, adjusting sleeve, 341, first annular space, 342, second annular space, 35, key, 4, first clamping assembly, 41, upper cone, 42, first slip sleeve, 43, first spring plate, 44, upper slip, 45, second shear pin, 5, second seal assembly, 51, upper slip sleeve, 52, middle rubber cylinder, 53, lower rubber cylinder, 54, limiting ring, 55, first locking ring, 56, fourth shear pin, 6, second clamping assembly, 61, lower cone, 62, second slip sleeve, 63, lower slip, 64, second spring plate, 65, third shear pin, 7, first locking mechanism, 71, thrust piston, 72, piston sleeve, 721, first compression cavity, 8, second locking mechanism, 81, locking sleeve, 82, middle piston, 83, The lower cylinder sleeve 831, the second pressure inlet cavity, 84, the lower piston 85, the fifth shear pin 86, the second lock ring 87, the sixth shear pin 9, the unsealing mechanism 91, the ball seat 92, the steel ball 93, the ball seat sleeve 94, the first shear pin 95, the lock block 10, the upper joint 11, the lower joint 111, the pressure relief sleeve 12, the main channel 121, the first pressure transfer hole 122, the second pressure transfer hole 13, the first limit groove 14 and the first locating block.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

Example 1

Please refer to fig. 1-7, the utility model provides a high pressure resistant packer for setting on sleeve pipe, including threaded connection's last center tube 1 and lower center tube 2, upward be equipped with first seal assembly 3 on center tube 1 and the lower center tube 2 in proper order, first seat card subassembly 4, second seal assembly 5, second seat card subassembly 6, first locking mechanism 7, second locking mechanism 8 and deblocking mechanism 9, go up the upper end threaded connection upper joint 10 of center tube 1, the lower extreme threaded connection lower joint 11 of lower center tube 2.

Go up and link up on center tube 1 and the lower center tube 2 and be equipped with continuous main channel 12, first pass pressure hole 121 and second pass pressure hole 122 have been seted up on main channel 12, first pass pressure hole 121 is used for transmitting the pressure of center tube for first locking mechanism 7, second passes pressure hole 122 and is used for transmitting the pressure of center tube 1 for second locking mechanism 8, make first locking mechanism 7, extrude first sealing component 3 when second locking mechanism 8 moves up along the length direction of center tube 1, first sealing component 3 struts the upper end of support sleeve, first seat card subassembly 4 struts the upper end that blocks the sheathed tube, second sealing component 5 struts to separate into upper chamber and lower chamber two parts with the sleeve pipe, second seat card subassembly 6 struts the lower extreme that blocks the sheathed tube.

Deblocking mechanism 9 includes ball seat 91, steel ball 92 and ball seat cover 93, and ball seat 91 and the inner wall threaded connection of main passageway 12 to fixed through first shear pin 94, steel ball 92 holding is in ball seat 91, and ball seat cover 93 cover is established in the upper end of ball seat 91 and is spacing with it cooperation, and ball seat cover 93 passes through the locking piece 95 and locks with the inner wall of main passageway 12.

The steel ball 92 is matched with the ball seat 91, the locking block 95 is circumferentially arranged on the lower central tube 2, the ball seat sleeve 93 is locked with the inner wall of the main channel 12 through the locking block 95, and the steel ball 92 which is input in a matched mode achieves pressure building of the tubular column part above the ball seat sleeve 93, so that the packer achieves setting; when needing the deblocking drop into ball seat 91 with the steel ball, suppress and make the ball seat release, ball seat cover and locking piece can fall along with the ball seat, and the outside part of packer loses the support downstream of locking piece, and slips and packing element retract, and safe and reliable can satisfy different well conditions and different oil recovery technology requirements, compares with the packer of other same specifications, and the internal diameter can be processed bigger, increases the oil production volume.

Preferably, the ball seat 91 may be a cylinder, so that the steel ball 92 falls into the ball seat, and the steel ball 92 and the inner wall of the ball seat 91 are in closer contact, thereby achieving blocking. Be fluted on the outer wall of ball seat 91, the embedding of first shear pin 94 of being convenient for is equipped with first sealing washer between ball seat 91 and the lower center tube 2 to improve ball seat 91 and the sealing performance between the lower center tube 2.

The setting value of the ball seat 91 is preferably set to 40MPa, and the setting value of the ball seat 91 may be changed by adding or subtracting shear pins as needed.

In order to prevent the parts, namely the ball seat sleeve 93, the locking block 95 and the ball seat 91 from falling to the bottom of the well after the product is unsealed, and causing pollution, a pressure relief sleeve 111 is preferably arranged in the lower joint 11; an oil drainage channel communicated with the pressure relief sleeve 111 is arranged on the ball seat 91, and when the pipe column is lifted up after the packer is unsealed, liquid in the oil pipe is discharged through the oil drainage channel.

The packer can be a plurality of while go into the sleeve pipe, set simultaneously, also can adjust the internal diameter of ball seat 91 as required in order to adapt to the not soluble ball of equidimension, from the bottom up sets one by one. Compared with the conventional packer, the packer can bear higher differential pressure, and can bear higher differential pressure by adjusting the releasing value of the ball seat 91 according to different pressure requirements; if the packer needs to be taken out after production is finished or the packer needs to be forcibly taken out when abnormal conditions occur, the packer can be unsealed by directly throwing balls to realize the unsealing, and the lower central tube 2 can also be cut off by using a special mechanical cutting knife or a chemical cutting mode to realize the unsealing.

Example 2

In the present embodiment, on the basis of the above embodiment, one of the optimized designs is made, the first sealing assembly 3 includes an adjusting ring 31, a rubber cylinder 32 with holes, a connecting sleeve 33 and an adjusting sleeve 34, which are sequentially sleeved on the upper central tube 1, the adjusting ring 31 is fixed to the outer wall of the upper central tube 1, and the connecting sleeve 33 is matched with and limited by the outer wall of the adjusting sleeve 34. The packing element is inflated by the action of pressure to seal the annular gap between the casing and the packer against fluid flow.

Be equipped with first spacing groove 13 and first locating piece 14 on the outer wall of last center tube 1, it is equipped with key 35 to slide in first spacing groove 13, and the inner wall of adjusting sleeve 34 is equipped with the first annular space 341 that is used for restricting the removal stroke of key 35 to and be used for restricting the second annular space 342 of the removal stroke of first locating piece 14, with the displacement of control adjusting sleeve 34, avoid excessively extrudeing foraminiferous packing element 32. Wherein, key 35 circumference distributes on the outer wall of last center tube 1, guarantees that the annular component on the center tube can more steady move along the center tube.

The first seating and clamping assembly 4 comprises an upper cone 41 sleeved on the upper central tube 1, an upper slip 44 is installed between the adjusting sleeve 34 and the upper cone 41 through a first slip sleeve 42 and a first spring piece 43, the upper end of the upper cone 41 is fixed with the first slip sleeve 42 through a second shear pin 45, and the first slip sleeve 42 is matched with the outer wall of the adjusting sleeve 34 for limiting. Through setting up first seat card subassembly 4 can prevent effectively that the longitudinal movement of packer from influencing sealing performance, can adapt to in deep well and the high-pressure operation, wherein, go up slips 44 circumference and distribute on the outer wall of last center tube 1, realize with the stable locking of last center tube 1.

Meanwhile, in order to ensure the reliability of recovery of the upper slip 44 of the packer during the lifting and deblocking of the packer, four grooves with different depths are designed on the first slip sleeve 42, so that the upper slip 44 is recovered respectively according to the grooves with different depths on the first slip sleeve 42 during recovery, and the risk during packer deblocking is reduced.

The second sealing assembly 5 comprises an upper rubber tube 51, a middle rubber tube 52 and a lower rubber tube 53 which are sequentially sleeved on the upper central tube 1, wherein the upper rubber tube 51 is abutted with the upper cone 41. The packing element is inflated by the action of pressure to seal the annular gap between the casing and the packer against fluid flow. Preferably, a limiting ring 54 and a first lock ring 55 which are sleeved on the upper central tube 1 are arranged between the lower rubber sleeve 53 and the lower cone 61, and the lower cone 61 and the first lock ring 55 are fixed through a fourth shear pin 56.

The second seating and clamping assembly 6 comprises a lower cone 61 and a second slip sleeve 62 which are sleeved on the upper central tube 1, a lower slip 63 and a second spring piece 64 are arranged between the lower cone 61 and the second slip sleeve 62, and the lower end of the lower cone 61 and the second slip sleeve 62 are fixed through a third shear pin 65. The longitudinal movement of the central pipe can be further prevented from influencing the sealing performance of the packer, the packer can adapt to deep well and high-pressure operation, wherein the lower slips 63 are circumferentially distributed on the outer wall of the upper central pipe 1 and are cooperated with the upper slips 44 to realize stable locking with the upper central pipe 1.

Preferably, a lock ring accommodating cavity is provided in the lower cone 61 to limit the moving stroke of the first lock ring 55.

The first locking mechanism 7 comprises a thrust piston 71 and a piston sleeve 72, the thrust piston 71 is sleeved on the upper central tube 1, the outer wall of the upper end of the thrust piston 71 is matched and limited with the inner wall of the second slip sleeve 62, the inner wall of the upper end of the piston sleeve 72 is matched, limited and fixed with the outer wall of the thrust piston 71, the middle of the piston sleeve 72 is sleeved and fixed on the lower central tube 2, and a first pressure inlet cavity 721 communicated with the first pressure transmission hole 121 is arranged between the thrust piston 71 and the piston sleeve 72.

Preferably, a first steel support ring, a first special-shaped retainer ring, a second sealing ring, a first clamping ring and a second clamping ring are arranged between the thrust piston 71 and the upper central tube 1, and the thrust piston 71 is supported by the first steel support ring; a third sealing ring and a first retaining ring are arranged between the thrust piston 71 and the piston sleeve 72 so as to improve the sealing performance between the thrust piston 71 and the upper central tube 1 and the structural stability of the thrust piston 71 during movement; the piston sleeve 72 is provided with a liquid outlet hole for discharging waste liquid conveniently.

The second locking mechanism 8 comprises a lock sleeve 81, a middle piston 82, a lower cylinder sleeve 83 and a lower piston 84, the middle piston 82 and the lower piston 84 are sleeved on the lower central tube 2, the upper end of the middle piston 82 is fixed with the inner wall of the piston sleeve 72, the inner wall of the upper end of the lock sleeve 81 is matched with the outer wall of the piston sleeve 72 for limiting and is fixed through a fifth shear pin 85, the lock sleeve 81 is sleeved on the middle piston 82 and is provided with a second lock ring 86 therebetween, the lock sleeve 81 and the second lock ring 86 are fixed through a sixth shear pin 87, the lower cylinder sleeve 83 is slidably sleeved outside the middle piston 82, the upper end of the lower cylinder sleeve 83 is fixed with the outer wall of the lower end of the lock sleeve 81, the lower end of the lower cylinder sleeve 83 is matched with the outer wall of the lower piston 84 for limiting and is fixed, and a second pressure inlet cavity 831 communicated with the second pressure transmission hole 122 is arranged between the middle. By providing the fifth shear pin 85, the second locking collar 86 is prevented from rotating when moved.

Preferably, a second steel support ring, a second special-shaped retainer ring, a fourth sealing ring, a third retainer ring and a fourth retainer ring are arranged between the middle piston 82 and the lower central tube 2, and the middle piston 82 is supported by the second steel support ring; and a fifth sealing ring and a second retaining ring are arranged between the middle piston 82 and the lower cylinder sleeve 83 so as to improve the sealing performance between the middle piston 82 and the lower central tube 2 and the stability of the structure when the middle piston 82 moves, and a liquid outlet hole is formed in the lower cylinder sleeve 83 so as to facilitate the discharge of waste liquid. A sixth sealing ring is arranged between the lower piston 84 and the lower cylinder sleeve 83, a seventh sealing ring is arranged between the lower piston 84 and the lower central tube 2, and the upper end and the lower end of the locking block 95 are respectively matched with the lower cylinder sleeve 83 and the lower piston 84 in an inclined plane.

The first lock ring 55 is provided with a first reverse buttress thread that mates with the upper base pipe 1, and the second lock ring 86 is provided with a second reverse buttress thread that mates with the lower base pipe 2. The first locking ring 55 and the second locking ring 86 can only walk downwards and cannot be reversed under the action of pressure, the self-locking function is achieved, when pressure liquid pushes other parts to move downwards, the first locking ring 55 is pushed to move together, the parts moving upwards when pressure is released to zero are locked, and the parts cannot return due to disappearance of pressure, and the key for successful anchoring and packing is achieved.

The first pressure transmission hole 121 and the second pressure transmission hole 122 are used for transmitting pressure, so that the first sealing assembly 3 is extruded when the first locking mechanism 7 and the second locking mechanism 8 move upwards along the length direction of the central pipe, the upper end of the support sleeve is opened by the first sealing assembly 3, and sand of the upper sleeve is prevented from falling to influence the normal operation of the packer; the first seat clamping component 4 is used for expanding and clamping the upper end of the sleeve to prevent the packer from generating longitudinal displacement in the working process; the second seal assembly 5 is expanded to separate the casing into two parts, an upper chamber and a lower chamber, so that the packer can be used downhole at higher pressures and the inner diameter of the main passage 11 can be made larger to increase oil production. The second seat clamping component 6 is used for opening the lower end of the clamping sleeve to prevent the packer from sliding upwards due to the increase of the annular pressure of the lower cavity, the packer is locked up and down simultaneously, the seat sealing reliability is improved, the mode of a rubber cylinder with holes, an upper slip, a rubber cylinder and a lower slip is adopted, the slips can be prevented from being buried by sediments or other impurities falling from the upper side of the sleeve, and the sealing stability of the rubber cylinder of the packer in the sleeve is improved.

The utility model provides a be used for sitting and seal high pressure resistant packer on sleeve pipe, its theory of operation as follows: the upper part of the packer is connected with an oil pipe through a thread, the lower part of the packer is connected with the oil pipe and other tools through a thread, the packer is lowered to a preset depth of an oil well, a soluble ball is thrown into a ball seat 91 for plugging, the releasing value of the ball seat 91 is 40MPa, pressure is injected into a central pipe 1, when the pressure reaches 14-16MPa, the pressure is acted on a thrust piston 71 and a middle piston 82 through a first pressure transmission hole 121 and a second pressure transmission hole 122, the piston is operated to cut a fifth shear pin 85 and a sixth shear pin 87 on a lock sleeve 81, under the action of the pressure, the lock sleeve 81, a second seat clamping assembly 6, a second sealing assembly 5, a first seat clamping assembly 4 and a first sealing assembly 3 all move upwards, a rubber cylinder 32 with holes is squeezed to support the sleeve, a second shear pin 45 is cut, an upper slip 44 supports the sleeve, the rubber cylinder on the second sealing assembly 5 supports the sleeve to separate the sleeve into an upper cavity and a lower cavity, the fourth shear pin 56 on the lower cone 61 is sheared, the lower slip 63 is expanded to clamp the casing, and the pressure is continuously increased to 20MPa, so that the positioning and effective separation of the upper slip 44, the lower slip 63 and the rubber cylinder from the casing are ensured.

After the setting is finished, dissolving the soluble ball, pressing the soluble ball from the annular space of the upper cavity of the packer, performing a sealing verification test on the rubber cylinder, and enabling the packer to enter a production stage after the sealing is qualified; when oil well production finishes or other reasons need take out the packer, throw steel ball 92 to ball seat 91 to the packer inner chamber, hit and press to 40MPa ball seat 91 and release, ball seat cover 93 and locking piece 95 follow ball seat 91 whereabouts to pressure release cover 111 on, the back is fallen down to locking piece 95, loses the outside part downstream of packer that locking piece 95 supported, simultaneously under the effect of spring leaf, the slips is retracted, under the effect of packing element elasticity, the packing element retracts, the packer realizes the deblocking.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A high pressure resistant packer for setting on a casing, characterized in that: the sealing device comprises an upper central tube (1) and a lower central tube (2) which are connected in a threaded manner, wherein a first sealing assembly (3), a first clamping assembly (4), a second sealing assembly (5), a second clamping assembly (6), a first locking mechanism (7), a second locking mechanism (8) and a deblocking mechanism (9) are sequentially arranged on the upper central tube (1) and the lower central tube (2), the upper end of the upper central tube (1) is connected with an upper connector (10) in a threaded manner, and the lower end of the lower central tube (2) is connected with a lower connector (11) in a threaded manner;

the upper central tube (1) and the lower central tube (2) are provided with a main channel (12) which is communicated with each other, the main channel (12) is provided with a first pressure transmission hole (121) and a second pressure transmission hole (122), the first pressure transmission hole (121) is used for transmitting the pressure of the central tube to the first locking mechanism (7), the second pressure transmission hole (122) is used for transmitting the pressure of the central pipe (1) to the second locking mechanism (8) so that the first locking mechanism (7) and the second locking mechanism (8) extrude the first sealing component (3) when moving upwards along the length direction of the central pipe (1), the first sealing component (3) props up the upper end of the support sleeve, the first clamping component (4) is used for expanding to clamp the upper end of the sleeve, the second sealing component (5) is used for expanding to divide the sleeve into an upper cavity and a lower cavity, and the second clamping component (6) is used for expanding to clamp the lower end of the sleeve;

deblocking mechanism (9) include ball seat (91), steel ball (92) and ball seat cover (93), the inner wall threaded connection of ball seat (91) and main entrance (12) to it is fixed through first shear pin (94), steel ball (92) holding is in ball seat (91), ball seat cover (93) cover is established in the upper end of ball seat (91) and is spacing with it cooperation, ball seat cover (93) are through the inner wall locking of locking piece (95) with main entrance (12).

2. The high pressure resistant packer for setting on a casing of claim 1, wherein: and a pressure relief sleeve (111) is arranged in the lower joint (11), and an oil drainage channel communicated with the pressure relief sleeve (111) is arranged on the ball seat (91).

3. The high pressure resistant packer for setting on a casing of claim 1, wherein: first seal assembly (3) are including adjusting ring (31), foraminiferous packing element (32), adapter sleeve (33) and adjusting sleeve (34) of establishing on last center tube (1) in proper order the cover, it is fixed with the outer wall of last center tube (1) to adjust ring (31), adapter sleeve (33) are spacing with the outer wall cooperation of adjusting sleeve (34).

4. A high pressure resistant packer for setting on a casing as claimed in claim 3, wherein: first seat card subassembly (4) is established last cone (41) on last center tube (1) including the cover, slips (44) are installed through first slip cover (42) and first spring leaf (43) between adjusting sleeve (34) and last cone (41), it is fixed through second shear pin (45) to go up between the upper end of cone (41) and first slip cover (42), the outer wall cooperation of first slip cover (42) and adjusting sleeve (34) is spacing.

5. The high pressure resistant packer for setting on a casing of claim 4, wherein: the second sealing assembly (5) comprises an upper rubber tube (51), a middle rubber tube (52) and a lower rubber tube (53) which are sequentially sleeved on the upper central tube (1), and the upper rubber tube (51) is abutted to the upper cone (41).

6. The high pressure resistant packer for setting on a casing of claim 5, wherein: the second clamping component (6) comprises a lower cone (61) and a second slip sleeve (62), the lower cone (61) and the second slip sleeve (62) are sleeved on the upper central pipe (1), a lower slip (63) and a second spring piece (64) are arranged between the lower cone (61) and the second slip sleeve (62), and the lower end of the lower cone (61) and the second slip sleeve (62) are fixed through a third shear pin (65).

7. The high pressure resistant packer for setting on a casing of claim 6, wherein: first locking mechanism (7) are including thrust piston (71), piston sleeve (72), thrust piston (71) cover is established on last center tube (1), just the outer wall of thrust piston (71) upper end is spacing with the inner wall cooperation of second slip cover (62), the inner wall of piston sleeve (72) upper end is spacing and fixed with the outer wall cooperation of thrust piston (71), the middle part cover of piston sleeve (72) is established and is fixed on center tube (2) down, be equipped with between thrust piston (71) and piston sleeve (72) with the communicating first pressure chamber (721) of first biography pressure hole (121).

8. The high pressure resistant packer for setting on a casing of claim 7, wherein: the second locking mechanism (8) comprises a lock sleeve (81), a middle piston (82), a lower cylinder sleeve (83) and a lower piston (84), the middle piston (82) and the lower piston (84) are sleeved on the lower central tube (2), the upper end of the middle piston (82) is fixed with the inner wall of the piston sleeve (72), the inner wall of the upper end of the lock sleeve (81) is matched with the outer wall of the piston sleeve (72) for limiting and is fixed through a fifth shear pin (85), the lock sleeve (81) is sleeved on the middle piston (82) and is provided with a second lock ring (86) between the middle piston and the middle piston, the lock sleeve (81) and the second lock ring (86) are fixed through a sixth shear pin (87), the lower cylinder sleeve (83) is sleeved outside the middle piston (82) in a sliding manner, the upper end of the lower cylinder sleeve (83) is fixed with the outer wall of the lower end of the lock sleeve (81), and the lower end of the lower cylinder sleeve (83) is matched with the outer wall of the lower piston, and a second pressure inlet cavity (831) communicated with the second pressure transmission hole (122) is arranged between the middle piston (82) and the lower cylinder sleeve (83).

9. A high pressure resistant packer for setting on a casing as claimed in claim 3, wherein: the outer wall of the upper central tube (1) is provided with a first limiting groove (13) and a first positioning block (14), a key (35) is arranged in the first limiting groove (13) in a sliding mode, a first annular space (341) used for limiting the moving stroke of the key (35) is arranged on the inner wall of the adjusting sleeve (34), and a second annular space (342) used for limiting the moving stroke of the first positioning block (14) is arranged.

10. The high pressure resistant packer for setting on a casing of claim 7, wherein: a limiting ring (54) and a first locking ring (55) which are sleeved on the upper central tube (1) are arranged between the lower rubber sleeve (53) and the lower cone (61), and the lower cone (61) and the first locking ring (55) are fixed through a fourth shear pin (56).