CN212479135U - Oil pipe anchor of hanging is sat to pushing down - Google Patents

Abstract

The utility model relates to a press down and sit tubing anchor of hanging belongs to anchoring tool technical field in the pit. The tubing anchor comprises a central tube, a hanging and deblocking mechanism and a lower joint, wherein the hanging and deblocking mechanism is sleeved on the central tube, and the lower joint is arranged at the end head of the central tube on one side of the hanging and deblocking mechanism. The tubing anchor extrudes the slips through the cone, so that the slips are meshed on the casing, the setting and hanging can be realized, when the setting and the hanging are not performed, the central pipe can be directly lifted up to perform the setting and the hanging, the recovery is performed, the setting and the releasing are not required to be performed through rotation, and the setting and the releasing are rapid; through the central tube to the lower clutch transmission moment of torsion of lock ring seat cooperation key piece ability, solved traditional mechanical oil pipe anchor and sat through the rotation and hang and the deblocking, sit and hang and deblocking process slow, and can not transmit the problem of moment of torsion.

Description

Oil pipe anchor of hanging is sat to pushing down

Technical Field

The utility model relates to a press down and sit tubing anchor of hanging belongs to anchoring tool technical field in the pit.

Background

In the process of underground measure operation and sucker-rod oil pumping production, because the production or measure tubular column is influenced by underground complex working conditions, the tubular column inevitably faces the problems of play and worsening of the stress state, and in order to prevent the up-and-down play of an oil pipe and improve the stress state of the tubular column, the tubular column is mainly fixed by using an underground tubing anchor to protect the oil pipe at present. The tubing anchor is anchored on the wall of the casing through the slips, so that the tubing string is relatively fixed on the casing, thereby improving the play of the tubing string, reducing the fatigue damage of the tubing string, controlling the extension and retraction of the tubing string, reducing the leakage and prolonging the service life of the tubing string. Existing tubing anchors can be divided into two broad categories: hydraulic tubing anchors and mechanical tubing anchors. The hydraulic oil pipe is characterized in that under the action of a wellhead high-pressure pump liquid, high-pressure drilling fluid acts on a setting piston through a hydraulic hole of a central pipe, the setting piston pushes a cone to squeeze a slip to realize anchoring, but in a specific pipe column and a specific process, due to the limitation of the structure and the process of the pipe column, a hydraulic oil pipe anchor cannot be used, so that a mechanical oil pipe anchor is adopted in most petroleum drilling projects; the mechanical tubing anchor generally works by rotating a central pipe, namely a cone is in threaded engagement with the central pipe, a slip is extruded in the axial movement process of the cone, the tubing anchor is hung, the slip is unlocked by reverse rotation in the releasing and recovering process, the hanging and recovering processes are slow, the tubing anchor cannot be hung and recovered rapidly, and meanwhile, the tubing anchor cannot transmit torque in the rotating hanging process, so that the improvement of the mechanical tubing anchor is needed.

Disclosure of Invention

The utility model aims at: aiming at the defects of the prior art, the tubing anchor which can be quickly hung and recovered and can be pressed down to hang is provided.

The technical scheme of the utility model is that:

the utility model provides a tubing anchor of hanging is sat to pushing down, it comprises center tube, seat string deblocking mechanism and lower clutch, its characterized in that: the central pipe is sleeved with a hanging and deblocking mechanism, and the end of the central pipe on one side of the hanging and deblocking mechanism is provided with a lower joint; the slip setting and releasing mechanism consists of a slip, a slip sleeve, an upper cone, a lower cone and a locking ring seat, wherein the slip sleeve is arranged on the slip and is movably embedded and connected with the slip; an upper cone is arranged on the slip sleeve on one side of the slip through a shearing pin A; the slip sleeve on the other side of the slip is provided with a lower cone through a guide ring, and the lower cone and the upper cone are respectively connected with the slip in an intermittent abutting mode; the inside of the slip is provided with a lock ring seat which is respectively connected with the slip and the lower cone in a sliding way.

And a spring is arranged between the slip and the slip sleeve.

The end of the upper cone extends to the upper part of the slip sleeve, an upper guide ring is arranged on the upper cone extending to the upper part of the slip sleeve through a fastening screw B, and the upper guide ring is fixedly connected with the central pipe through a fastening screw A.

The guide ring is in threaded connection with the slip sleeve, and the end face of the guide ring is intermittently abutted and connected with the lower cone.

The lower cone is provided with a guide pin and is connected with the slip sleeve in a sliding manner through the guide pin; the end of the lower cone extends to the lower part of the guide ring, and the end of the lower cone extending to the lower part of the guide ring is in threaded connection with the lower joint; and a setting lock ring is arranged on the lower cone on one side of the lower joint through a cylindrical head bolt, and the setting lock ring is meshed and connected with the lock ring seat.

The end socket of one end of the lock ring seat is fixedly connected with the central pipe through a shearing pin B, an unsealing lock ring is arranged between the end socket of the other end of the lock ring seat and the central pipe, and the unsealing lock ring is meshed with the lock ring seat.

The unsealing lock ring is intermittently meshed and connected with the central pipe.

The lower joint is fixedly connected with the locking ring seat through shear pins C which are uniformly distributed along the circumferential direction; the lower connector is axially provided with a key groove, the lock ring seat is correspondingly provided with a key block, and the key block is slidably connected with the key groove.

The central tube is provided with a limit groove corresponding to the lock ring seat, and the limit groove is connected with the end of the lock ring seat in an inserting way.

The beneficial effects of the utility model reside in that:

the tubing anchor of the downward pressing hanging seat extrudes the slips through the cone, so that the slips are meshed on the casing, the hanging seat can be realized, when the slip is unsealed, the central tube can be unsealed by directly lifting up, the central tube can be recovered, the hanging seat and the unsealing do not need to be rotated, and the hanging seat and the unsealing are rapid; through the central tube to the lower clutch transmission moment of torsion of lock ring seat cooperation key piece ability, solved traditional mechanical oil pipe anchor and sat through the rotation and hang and the deblocking, sit and hang and deblocking process slow, and can not transmit the problem of moment of torsion.

Drawings

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

FIG. 2 is a schematic view of the structure in the direction A-A of FIG. 1;

FIG. 3 is a schematic view of the structure in the direction B-B in FIG. 1;

FIG. 4 is an enlarged schematic view at C of FIG. 1;

fig. 5 is a schematic view of the sitting and hanging state of the present invention;

fig. 6 is a schematic view of the unsealing state of the present invention;

fig. 7 is a schematic diagram of the emergency release state of the present invention.

In the figure: 1. the pipe comprises a central pipe, 2, a lower joint, 3, a slip, 4, a slip sleeve, 5, an upper cone, 6, a lower cone, 7, a lock ring seat, 8, a spring, 9, a shearing pin A, 10, a fastening screw B, 11, an upper guide ring, 12, a fastening screw A, 13, a guide ring, 14, a guide pin, 15, a limiting slot, 16, a cylindrical head bolt, 17, a setting lock ring, 18, a shearing pin B, 19, an unlocking lock ring, 20, a shearing pin C, 21, a key block, 22, a key groove, 23, a limiting groove, 24 and a sleeve.

Detailed Description

The downward pressing and hanging tubing anchor consists of a central tube 1, a hanging and deblocking mechanism and a lower joint 2, wherein the central tube 1 is sleeved with the hanging and deblocking mechanism, the hanging and deblocking mechanism consists of a slip 3, a slip sleeve 4, an upper cone 5, a lower cone 6 and a locking ring seat 7, the slip sleeve 4 is arranged on the slip 3, the slip sleeve 4 is movably embedded and connected with the slip 3, and during operation, the slip 3 can extend out of the slip sleeve 4 to be occluded with the inner wall of a sleeve 24 so as to realize hanging and hanging; a spring 8 is arranged between the slips 3 and the slip sleeve 4, and when the slips 3 are recovered, the slips can radially reset under the elastic force action of the spring 8 to be unlocked; an upper cone 5 is arranged on the slip sleeve 4 at one side of the slip 3 through a shearing pin A9; the end of the upper cone 5 extends to the upper part of the slip sleeve 4, an upper guide ring 11 is arranged on the upper cone 5 extending to the upper part of the slip sleeve 4 through a fastening screw B10, and the upper guide ring 11 is fixedly connected with the central pipe 1 through a fastening screw A12; a guide ring 13 is arranged on the slip sleeve 4 on the other side of the slip 3 in a threaded manner, a lower cone 6 is arranged on the inner side of the slip sleeve 4 through the guide ring 13, and the lower cone 6 and the upper cone 5 are respectively connected with the slip 3 in an intermittent abutting manner; the end face of the guide ring 13 is intermittently abutted and connected with the lower cone 6, the guide ring 13 is used for facilitating the assembly of the slip sleeve 4 and the lower cone 6, and meanwhile, the slip sleeve 4 can pull the lower cone to move upwards through the guide ring 13; the lower cone 6 is provided with a guide pin 14, and the guide pin 14 is connected with the slip sleeve 4 in a sliding manner through a limiting slot 15; the end of the lower cone 6 extends to the lower part of the guide ring 13, and the lower joint 2 is installed at the end of the lower cone 6 extending to the lower part of the guide ring 13 through threads; a setting lock ring 17 is arranged on the lower cone 6 at one side of the lower joint 2 through a cylindrical head bolt 16.

A lock ring seat 7 is arranged on the inner side of the slip 3, the lock ring seat 7 is respectively connected with the slip 3 and the lower cone 6 in a sliding manner, the lock ring seat 7 is connected with a setting lock ring 17 in a meshing manner, and teeth of the lock ring seat 7 and the setting lock ring 17 have directionality, so that the lock ring seat 7 can slide downwards relative to the setting lock ring 17 and cannot move upwards; one end of the lock ring seat 7 is fixedly connected with the central tube 1 through a shearing pin B18, an unsealing lock ring 19 is arranged between the other end of the lock ring seat 7 and the central tube 1, the outer side of the unsealing lock ring 19 is meshed with the lock ring seat 7, the inner side of the unsealing lock ring 19 is intermittently meshed with the central tube 1, and the teeth of the unsealing lock ring 19 and the central tube 1 have directionality, so that the central tube 1 can slide upwards relative to the unsealing lock ring 19 and cannot move downwards; the lock ring seat 7 is fixedly connected with the lower connector 2 through shearing pins C20 which are uniformly distributed along the circumferential direction, the lock ring seat 7 is provided with a key block 21, the lower connector 2 is provided with a key groove 22 which corresponds to the key block 21 along the axial direction, the key groove 22 is in sliding connection with the key block 21, after the shearing pin C20 is sheared, the lock ring seat 7 can move in the axial direction under the action of the key block 21 and the key groove 22 and cannot rotate in the circumferential direction, and therefore the lock ring seat 7 can transmit torque to the lower connector 2 through the key block 21 and the key groove 22; the central tube 1 is provided with a limiting groove 23 corresponding to the locking ring seat 7, the limiting groove 23 is connected with the end of the locking ring seat 7 in a plug-in manner, when the limiting groove 23 is connected with the end of the locking ring seat 7 in a plug-in manner, the central tube 1 can drive the locking ring seat 7 to rotate through the limiting groove 23, and then the lower joint 2 is driven to rotate, namely, the central tube 1 transmits torque to the lower joint 2 through the locking ring seat 7 when the limiting groove 23 is connected with the end of the locking ring seat 7 in a plug-in manner.

When the tubing anchor of the downward pressing hanging device is hung, the central tube 1 is pressed downwards, under the action of a supporting force of a tubing string below the lower connector 2 on the lower connector 2, the central tube 1 moves downwards relative to the lower connector 2, in the downward movement process of the central tube 1, the lock ring seat 7 is driven to move downwards through the shearing pin B18, in the downward movement process of the lock ring seat 7, the lock ring seat 7 forms shearing force relative to the lower connector 2, the shearing pin C is cut off under the action of the shearing force, the lock ring seat 7 moves downwards relative to the lower connector 2, the lower cone 6 is gradually contacted with the slips 3 and is abutted against each other under the action of the lower connector 2, the slips 3 is pushed by the lower cone 6 to move upwards, and the slip sleeve 4 is driven to move upwards through the slips 3; in the downward movement process of the central tube 1, the fastening screw A12 drives the upper guide ring 11 to move downwards, so that the upper guide ring 11 drives the upper cone 5 to move downwards through the fastening screw B10, the slip sleeve 4 moves upwards due to the downward movement of the upper cone 5, a shearing force is formed between the upper cone 5 and the slip sleeve 4, the shearing pin A9 is cut off under the action of the shearing force in the relative movement process of the upper cone 5 and the slip sleeve 4, the upper cone 5 moves downwards relative to the slip sleeve 4, and the upper cone 5 is gradually contacted with the slips 3 and is abutted against each other in the downward movement process of the upper cone 5 relative to the slip sleeve 4; after the upper cone 5 and the slips 3 are abutted against each other, in the process that the central tube 1 continues to move downwards, the central tube 1 drives the upper cone 5 to downwards extrude the slips 3 through the upper guide ring 11, the lower joint 2 enables the lower cone 6 to upwards extrude the slips 3, under the action of the conical inclined planes of the upper cone 5 and the lower cone 6, the slips 3 are outwards extruded by the upper cone 5 and the lower cone 6 in the radial direction, the slips 3 overcome the elastic force of the spring 8 to move outwards in the radial direction, and the slips 3 are gradually engaged with the inner wall of the sleeve 24 in the outward movement process to realize sitting and hanging; in the relative movement process of the lock ring seat 7 and the lower cone 6, the lower cone 6 drives the setting lock ring 17 to move through the cylindrical head bolt 16, so that the setting lock ring 17 moves upwards relative to the lock ring seat 7, after the slips 3 are meshed with the inner wall of the sleeve 24, the setting lock ring 17 is meshed with the lock ring seat 7, under the action of teeth of the setting lock ring 17 and the lock ring seat 7, the setting lock ring 17 is meshed with the lock ring seat 7 and cannot slide relatively, the lock ring seat 7 is kept unchanged in position with the upper cone 5 through the shearing pin B18, the central tube 1 and the upper guide ring 11 in sequence, the setting lock ring 17 is kept unchanged in position with the lower cone 6 through the cylindrical head bolt 16, namely, after the slips 3 are meshed with the inner wall of the sleeve 24, under the action of the setting lock ring 17 and the lock ring seat 7, the positions of the upper cone 5 and the lower cone 6 are kept unchanged, and the upper cone 5 and the lower cone 6 are always kept in extrusion on the slips 3, the slips 3 are always engaged with the inner wall of the casing 24, and the slip 3 is kept in a sitting state with the inner wall of the casing 24.

After the oil pipe anchor of hanging is sat to this pressure down and is hung, the end of lock ring seat 7 passes through spacing groove 23 and is connected with center tube 1, and center tube 1 rotates in-process and drives lock ring seat 7 and rotate, and lock ring seat 7 rotates the in-process, drives lower clutch 2 through key piece 21 cooperation keyway 22 and rotates, makes center tube 1 can sit behind the slips 3 hang and transmit the moment of torsion to lower clutch 2 from this.

When the tubing anchor hung on the lower pressing seat is released and recovered, the central tube 1 is lifted up, in the process of lifting the central tube 1, the lock ring seat 7 is kept unchanged from the position of the lower connector 2 through the setting lock ring 17 and the lower cone 6, the lower connector 2 enables a shearing force to be formed between the lock ring seat 7 and the central tube 1, when the shearing force is large enough, the shearing pin B18 is cut off, the central tube 1 and the lock ring seat 7 slide relatively, in the process of upward movement of the central tube 1, the upper cone 5 is driven to move upwards through the upper guide ring 11, the slips 3 and the upper cone 5 are not contacted to form a gap, the slips 3 push the slips 3 to reset radially under the action of the elastic force of the spring 8, the slips 3 are not engaged with the inner wall of the sleeve 24 any more and are released, after the slips 3 are released from the inner wall of the sleeve 24, the central tube 1 is lifted up again, the central tube 1 pulls the upper cone 5 to move upwards through the upper guide ring 11, then the lower joint 2 is driven to move upwards, and the device can be recovered; in the process, the unlocking ring 19 and the central tube 1 slide relatively, and when the unlocking ring 19 slides to teeth on the central tube 1, the unlocking ring 19 is meshed and connected with the central tube 1.

When the central tube 1 cannot be unlocked by lifting the central tube 1, the central tube 1 is pressed downwards, the central tube 1 drives the lock ring seat 7 to move downwards through the unlocking lock ring 19, the lock ring seat 7 is gradually contacted with and abutted against the lower connector 2 in the downward movement process, after the lock ring seat 7 is abutted against the lower connector 2, in the process that the central tube 1 continues to be pressed downwards, the central tube 1 drives the lower connector 2 to move downwards through the lock ring seat 7, the lower connector 2 drives the lower cone 6 to move downwards in the downward movement process, the lower cone 6 is gradually not contacted with the slips 3, so that a gap is formed between the slips 3 and the lower cone 6, the slips 3 push the slips 3 to reset radially under the elastic force of the spring 8, the slips 3 are not engaged with the inner wall of the sleeve 24 any more, the slips 3 are emergently unlocked, and after the slips 3 are unlocked, the central tube 1 is lifted upwards to.

The tubing anchor pressed down and hung is used for extruding the slips 3 through the cone, so that the slips 3 are meshed on the casing, the hanging can be realized, when the sealing is released, the central tube 1 is directly lifted up to release the sealing, the sealing is recovered, the hanging and releasing are not required to be carried out through rotation, and the hanging and releasing are quick; through 7 cooperation key pieces 21 of lock ring seat, enable the 2 transmission torques of center tube 1 below joint, solved traditional mechanical oil pipe anchor and sat through the rotation and hang and the deblocking, sit and hang and deblocking process slowly, and can not transmit the problem of moment of torsion.

Claims (8)

1. The utility model provides a tubing anchor of hanging is sat to pushing down, it comprises center tube (1), sit string deblocking mechanism and lower clutch (2), its characterized in that: the central pipe (1) is sleeved with a hanging and deblocking mechanism, and the end of the central pipe (1) on one side of the hanging and deblocking mechanism is provided with a lower joint (2); the hanging and unlocking mechanism is composed of a slip (3), a slip sleeve (4), an upper cone (5), a lower cone (6) and a lock ring seat (7), the slip sleeve (4) is arranged on the slip (3), and the slip sleeve (4) is movably embedded and connected with the slip (3); an upper cone is arranged on the slip sleeve (4) on one side of the slip (3) through a shearing pin A (9); a slip sleeve (4) on the other side of the slip (3) is provided with a lower cone (6) through a guide ring (13), and the lower cone (6) and the upper cone (5) are respectively connected with the slip (3) in an intermittent abutting mode; the inner side of the slip (3) is provided with a lock ring seat (7), and the lock ring seat (7) is respectively connected with the slip (3) and the lower cone (6) in a sliding manner.

2. A landing tubing anchor according to claim 1, wherein: and a spring is arranged between the slip (3) and the slip sleeve (4).

3. A landing tubing anchor according to claim 1, wherein: the end of the upper cone (5) extends to the upper part of the slip sleeve (4), an upper guide ring (11) is arranged on the upper cone (5) extending to the upper part of the slip sleeve (4) through a fastening screw B (10), and the upper guide ring (11) is fixedly connected with the central pipe (1) through a fastening screw A (12).

4. A landing tubing anchor according to claim 1, wherein: the guide ring (13) is in threaded connection with the slip sleeve (4), and the end face of the guide ring (13) is intermittently abutted and connected with the lower cone (6).

5. A landing tubing anchor according to claim 1, wherein: the lower cone (6) is provided with a guide pin (14), and the lower cone (6) is connected with the slip sleeve (4) in a sliding manner through the guide pin (14); the end of the lower cone (6) extends to the lower part of the guide ring (13), and the end of the lower cone (6) extending to the lower part of the guide ring (13) is in threaded connection with the lower joint (2); a setting lock ring (17) is arranged on the lower cone (6) at one side of the lower joint (2) through a cylindrical head bolt (16), and the setting lock ring (17) is meshed and connected with the lock ring seat (7).

6. A landing tubing anchor according to claim 1, wherein: one end of the lock ring seat (7) is fixedly connected with the central tube (1) through a shearing pin B (18), an unsealing lock ring (19) is arranged between the other end of the lock ring seat (7) and the central tube (1), and the unsealing lock ring (19) is meshed with the lock ring seat (7); the unsealing lock ring (19) is intermittently meshed and connected with the central pipe (1).

7. A landing tubing anchor according to claim 1, wherein: the lower connector (2) is fixedly connected with the lock ring seat (7) through shear pins C (20) which are uniformly distributed along the circumferential direction; a key groove (22) is axially formed in the lower connector (2), a key block (21) is arranged on the lock ring seat (7) corresponding to the key groove (22), and the key block (21) is in sliding connection with the key groove (22).

8. A landing tubing anchor according to claim 1, wherein: the central tube (1) is provided with a limiting groove (23) corresponding to the lock ring seat (7), and the limiting groove (23) is connected with the end of the lock ring seat (7) in a plug-in manner.

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