CN216553838U - Mechanical type release device of oil pipe hanger - Google Patents

Abstract

The utility model provides a mechanical release device of an oil pipe hanger, which comprises a core rod and a sleeve sleeved outside the core rod, wherein the sleeve slides along the axial direction of the core rod; the releasing device also comprises a releasing structure, and the releasing structure is used for clamping and releasing the core rod; the handle releasing device also comprises a transposition structure, and the transposition structure is used for changing the gliding distance of the sliding sleeve; the disengaging device also comprises a plurality of claws, the positioning of the sliding sleeve and the sleeve with the oil well is realized through the propping open of the claws, the upward moving and releasing of the core rod are realized, and the hanger can be disengaged from the lower end of the core rod; the releasing device also comprises a furling structure used for furling the clamping jaws. According to the mechanical release device of the oil pipe hanger, the mechanical release device releases the hanger, and compared with an electronic release device, the mechanical release device is more durable, and the occurrence probability of faults of the release device is reduced; the simple operation, and can used repeatedly, can satisfy the hanger and transfer the operation demand of oil well.

Description

Mechanical type release device of oil pipe hanger

Technical Field

The utility model relates to an oil well throwing device, in particular to a mechanical type releasing device of an oil pipe hanger.

Background

At present, in the process of oil field exploitation, in order to know the pressure, temperature and other conditions of an oil well, a gas well and a water injection well, well conditions are tested regularly and at a fixed depth, so that the downhole conditions of the oil well, the gas well and the water injection well are known. In the prior art, an electronic type release device is adopted, but due to the complex underground environment and high underground temperature, internal electronic components are easy to lose effectiveness due to high temperature and vibration, and the normal work of the release device is influenced.

Disclosure of Invention

In view of the above, the present invention is directed to overcome the above-mentioned shortcomings in the prior art, and to provide a mechanical release device for a tubing hanger.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a mechanical release device of an oil pipe hanger comprises a core rod, wherein the core rod is fixedly connected with a first core rod and a second core rod through a connector;

the release device also comprises a sleeve sleeved outside the core rod, and the sleeve slides along the axial direction of the core rod; the sleeve is fixedly connected with the second sleeve through a first connecting sleeve, the top end of the first sleeve is fixedly sleeved outside an assembling ring, and the assembling ring is sleeved outside the first core rod and is connected with the first core rod in a sliding manner;

the releasing device further comprises a releasing structure, and the releasing structure is positioned at the upper end of the releasing device:

the releasing structure comprises a first spring and a sleeve ring, the first spring and the sleeve ring are both arranged between the first core bar and the first sleeve, the upper end of the first spring is abutted against the assembling ring, the lower end of the first spring is abutted against the sleeve ring, a plurality of through holes are formed in the sleeve ring, balls are arranged in the through holes, the balls are connected with the through holes of the sleeve ring in a sliding manner, and the sleeve ring is connected with the first core bar and the first sleeve in a sliding manner;

the lower end of the lantern ring abuts against the upper end of an annular boss arranged on the inner ring of the first sleeve, the ball abuts against a clamping table arranged outside the first core rod, a first clamping groove is formed in the side wall of the first sleeve at the position of the first spring, the thickness of the clamping table is smaller than the depth of the first clamping groove, and the depth of the first clamping groove is not larger than the diameter of the ball;

a clamping block is arranged outside the first core rod and can be abutted against the annular boss and the connector to limit the moving distance of the core rod;

the release device further comprises a transposition structure, and the transposition structure is positioned at the lower end of the release device:

the outer wall of the second sleeve is provided with an annular partition groove, the transposition structure comprises a first indexing claw and a second indexing claw which are arranged at two ends of the partition groove, and a plurality of indexing grooves which are arranged on the outer wall of the second sleeve, and the indexing grooves extend downwards from the partition groove; the inclined planes of the first indexing claw and the second indexing claw are opposite in inclination direction, the indexing groove is opposite to the inclined plane of the first indexing claw in position, and the inclined plane of the second indexing claw is opposite to the inclined plane bottom end of the first indexing claw in position; the indexing grooves comprise short indexing grooves and long indexing grooves which are arranged at intervals, and the length of each short indexing groove is smaller than that of each long indexing groove;

the second sleeve is externally sleeved with a sliding sleeve, and the sliding sleeve is connected with the second sleeve in a sliding manner; the sliding sleeve is formed by assembling a first positioning sleeve, a sliding sleeve, a second positioning sleeve, a second sliding ring, a second connecting sleeve and a third connecting sleeve which are sleeved outside the sleeve; the sliding sleeve is sleeved outside the second sleeve and is connected with the second sleeve in a sliding manner, and the first positioning sleeve and the second positioning sleeve are fixedly assembled at the upper end and the lower end of the sliding sleeve respectively; the lower end of the second positioning sleeve is fixedly connected with the second sliding ring, the second sliding ring is sleeved on the periphery of the second connecting sleeve and is connected with the second connecting sleeve in a sliding manner, and the upper end of the second connecting sleeve is provided with a retaining ring which is clamped at the upper end of the second sliding ring; the lower end of the second connecting sleeve is fixedly connected with a third connecting sleeve, and an annular groove is formed in the inner side wall of the third connecting sleeve;

the transposition structure further comprises a first sliding ring and a sliding block embedded in the first sliding ring, the first sliding ring is located in the annular groove, and the first sliding ring is connected with the second sleeve and the third connecting sleeve in a sliding mode; the sliding block is inserted into the short indexing groove or the long indexing groove; the transposition structure further comprises a plurality of elastic sheets arranged on the periphery of the sliding sleeve, and the middle parts of the elastic sheets are outwards protruded;

the releasing device further comprises a plurality of claws: the clamping jaws are positioned at the bottom end of the third connecting sleeve, the bottom end of the third connecting sleeve is hollow, the upper ends of the four clamping jaws are inserted in the hollow position, a second clamping groove in the middle of the clamping jaws is clamped and connected with a positioning ring arranged on the inner side wall of the lower end of the third connecting sleeve, four movable holes are formed in the hollow side wall of the third connecting sleeve above the positioning ring, and the upper ends of the clamping jaws can outwards extend from the movable holes and swing along the radial direction of the release device; a second sleeve below the clamping jaw is sleeved with a conical block, the mouth part of the conical block is adjacent to the side where the clamping jaw is located, and the clamping jaw can move to the periphery of the mouth part of the conical block to open the clamping jaw;

the releasing device further comprises a furling structure: the folding structure comprises a sliding plate fixed at the bottom end of the second core rod, the width of the sliding plate is larger than the diameter of the second sleeve, two ends of the sliding plate penetrate through sliding holes formed in the second sleeve and are inserted into a third sliding groove formed in the inner side wall of a third connecting sleeve, the bottom of the third sliding groove is provided with an opening, and the moving distance of the sliding plate is smaller than that of the clamping block.

Further, the width of the clamping table is smaller than the moving distance of the clamping block, the clamping table can move from the upper side of the first clamping groove to the lower side of the first clamping groove, and the balls are respectively clamped at the first clamping end and the second clamping end of the clamping table.

Furthermore, a first sliding groove and a second sliding groove are respectively formed in the adjacent ends of the first positioning sleeve and the second positioning sleeve, hook plates arranged at the two ends of the elastic sheet are respectively inserted into the first sliding groove and the second sliding groove and can slide along the axial direction of the first positioning sleeve or the second positioning sleeve, a first baffle is arranged at the insertion end of the first sliding groove, and a second baffle is arranged at the insertion end of the second sliding groove.

Furthermore, a second spring is arranged between the clamping jaw and the sliding sleeve piece, and the second spring is positioned at the upper end of the clamping jaw and is in a compressed state; the periphery of the bottom of the clamping jaw is provided with a plurality of circles of clamping teeth, and the outer edges of the clamping teeth incline upwards.

Further, a first locking block is fixedly assembled at the top end of the first core rod; the lower end of the second sleeve is fixedly provided with a second locking block; and a top cap is fixed on the periphery of the bottom end of the first core rod.

Compared with the prior art, the mechanical type release device of the oil pipe hanger has the following beneficial effects:

(1) according to the mechanical release device for the oil pipe hanger, the mechanical release device is used for releasing the hanger, and compared with an electronic release device, the mechanical release device is more durable, and the occurrence probability of failure of the release device is reduced.

(2) The mechanical type release device for the oil pipe hanger is convenient and fast to operate, can be repeatedly used, and can meet the operation requirement of lowering an oil well by the hanger.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic view of the overall structure of a mechanical release device for a tubing hanger according to the present invention;

FIG. 2 is a schematic view of the upper half of the structure of FIG. 1;

FIG. 3 is a schematic view of the lower half of FIG. 1;

FIG. 4 is a schematic diagram of a right-side view of a mechanical release device for a tubing hanger according to the present invention;

FIG. 5 is a schematic sectional view taken along line A-A of FIG. 4;

FIG. 6 is an enlarged view of the section A in FIG. 5;

FIG. 7 is an enlarged view of the portion B of FIG. 5;

FIG. 8 is an enlarged view of the section C in FIG. 5;

FIG. 9 is an enlarged view of the structure of section D in FIG. 5;

FIG. 10 is an enlarged view of section E of FIG. 5;

FIG. 11 is a schematic view of the cross-sectional structure along the line B-B in FIG. 4;

FIG. 12 is an enlarged view of the structure of section F in FIG. 11;

FIG. 13 is a schematic view of the internal structure of a mechanical release device for a tubing hanger according to the present invention;

FIG. 14 is an enlarged view of the upper half of FIG. 13;

FIG. 15 is an enlarged view of the lower half of FIG. 13;

FIG. 16 shows a block diagram of a release device;

fig. 17 shows a block diagram of a tubing hanger.

Description of reference numerals:

1-a first locking block; 1001-first assembly hole; 101-a first jacking bolt;

2-a first core rod; 201-a first positioning groove; 202-card table; 2021-a first clamping end; 2022-a second snap end; 203-a cartridge;

3-a first sleeve; 301-a first receiving groove; 302-a first card slot; 303-a second holding tank; 305-a first opening; 306-a second opening; 31-an assembly ring; 32-a first spring; 33-a collar; 34-a ball bearing; 35-an annular boss;

4-a connector;

5-a first connecting sleeve; 502-a first threaded hole;

6-a second core rod; 61-a slide plate; 62-a locating pin; 63-top cap;

7-a second sleeve; 701-a first ring groove; 702-a second ring groove; 703-a separation groove; 71-a first indexing pawl; 72-second indexing jaw; 73-short indexing groove; 74-long indexing groove; 75-a slide hole;

8-a first slip ring; 81-a slide block;

9-a spring plate; 901-hook plate;

11-a first locating sleeve; 1101-a first chute; 11011-first baffle; 1102-a second assembly hole; 111-a second jacking bolt;

12-a sliding sleeve; 1201-a second detent;

13-a second locating sleeve; 1301-a second chute; 13011 — a second baffle;

14-a second slip ring; 1401-a third opening;

15-a second connecting sleeve; 151-baffle ring;

16-a third connecting sleeve; 161-ring groove; 162-a third runner; 1601-a movable hole; 1602-grooves; 1603-positioning ring;

17-a jaw; 1701-a second card slot; 1702-latch; 171-a second spring;

18-a conical block;

19-a second locking block; 1901-second threaded hole;

300-a release device; 3001-first connection hole; 3002-second connection hole; 3003-hook; 30031-an abutment head; 3004-a third spring; 3005-threaded connection holes;

400-a hanger; 4001-card connector; 4002-roller support arm.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 13, the present embodiment provides a mechanical release device for a tubing hanger, which comprises a core rod, wherein the core rod is fixedly connected by a first core rod 2 and a second core rod 6 through a connector 4 by screw threads;

the release device also comprises a sleeve sleeved outside the core rod, and the sleeve slides along the axial direction of the core rod; the sleeve is fixedly connected with a first sleeve 3 and a second sleeve 7 through a first connecting sleeve 5 by screw threads, the top end of the first sleeve 3 is fixedly sleeved outside an assembling ring 31 through screw threads, and the assembling ring 31 is sleeved outside the first core rod 2 and is connected with the first core rod 2 in a sliding manner;

further, in this embodiment, the lower end of the first connecting sleeve 5 is provided with a plurality of first threaded holes 502, the upper end of the second sleeve 7 is provided with a first annular groove 701, and the second sleeve 7 is prevented from being loosened from the threaded connection of the first connecting sleeve 5 by the jackscrew inserted into the first threaded holes 502 and the first annular groove 701.

Should take off the hand device and still including taking off the card structure, should take off the card structure and be located the upper end of taking off the hand device:

specifically, the releasing structure comprises a first spring 32 and a sleeve ring 33, wherein the first spring 32 and the sleeve ring 33 are both arranged between the first core rod 2 and the first sleeve 3, the upper end of the first spring 32 abuts against the assembling ring 31, the lower end of the first spring abuts against the sleeve ring 33, a plurality of through holes are formed in the sleeve ring 33, four balls 34 are arranged in the through holes, the four balls 34 are connected with the through holes of the sleeve ring 33 in a sliding manner, and the sleeve ring 33 is connected with the first core rod 2 and the first sleeve 3 in a sliding manner;

the lower end of the lantern ring 33 abuts against the upper end of an annular boss 35 arranged on an inner ring of the first sleeve 3, the ball 34 abuts against a clamping table 202 arranged outside the first core rod 2, a first clamping groove 302 is formed in the side wall of the first sleeve 3 at the position of the first spring 32, the thickness of the clamping table 202 is smaller than the depth of the first clamping groove 302, and the depth of the first clamping groove 302 is not larger than the diameter of the ball 34;

further, in this embodiment, in order to avoid that the sleeve rebounds downward due to the elastic force of the first spring 32 after the ball 34 enters the first engaging groove 302, the sleeve slides downward due to the steeply increased elastic force, so that the releasing device 300 collides with the hanger 400, in this embodiment, the width of the snap ring is smaller than the moving distance of the latch 203, when the snap ring can move from the lower side of the first engaging groove 302 to the upper side of the first engaging groove 302, the ball 34 is separated from the first engaging groove 302 from the side of the second engaging end 2022 at the lower end of the snap ring, and when the first spring 32 rebounds downward, the second engaging end 2022 of the snap ring abuts against the ball 34, so as to prevent the sleeve from continuously moving downward.

Further, in this embodiment, a first opening 305 and a second opening 306 are respectively opened on the side wall of the first receiving groove 301 where the first spring 32 and the collar 33 are located and the side wall of the second receiving groove 303 where the latch 203 is located, so as to balance the pressure in the first receiving groove 301 and the second receiving groove 303 and reduce the resistance when the mandrel moves.

In the initial state, the core rod and the sleeve are kept at the positions shown in fig. 3 and 5 under the action of the elastic force of the first spring 32; during the use, when jack catch 17 anchor was on the wall of a well, the device of taking off the hand moved up, drove core bar and snap ring and moved up, and ball 34 moves up and falls into first draw-in groove 302, loses the joint effect to snap ring and core bar for the core bar can continue to move up for the sleeve, loses hood 63 and to the supporting role of taking off the hand device 300 interior couple 3003 butt head 30031, makes the joint head 4001 of hanger 400 take off the hand because of losing the hook effect of couple 3003.

A clamping block 203 is arranged outside the first core rod 2, and the clamping block 203 can be abutted against the annular boss 35 and the connector 4 to limit the moving distance of the core rod and prevent the core rod from falling off from the sleeve;

this take off hand device still includes transposition structure, and transposition structure is located the lower extreme of taking off the hand device:

an annular partition groove 703 is formed in the outer wall of the second sleeve 7, the transposition structure comprises a first indexing claw 71 and a second indexing claw 72 which are arranged at two ends of the partition groove 703, and a plurality of indexing grooves which are arranged on the outer wall of the second sleeve 7, and the indexing grooves extend downwards from the partition groove 703; the inclined surfaces of the first indexing claw 71 and the second indexing claw 72 are opposite in inclined direction, the inclined surface of the indexing groove is opposite to the inclined surface of the first indexing claw 71, and the inclined surface of the second indexing claw 72 is opposite to the inclined surface bottom end position of the first indexing claw 71; the indexing grooves comprise short indexing grooves 73 and long indexing grooves 74 which are arranged at intervals, and the length of each short indexing groove 73 is smaller than that of each long indexing groove 74;

a sliding sleeve is sleeved outside the second sleeve 7 and is connected with the second sleeve 7 in a sliding manner; specifically, the sliding sleeve is formed by assembling a first positioning sleeve 11, a sliding sleeve 12, a second positioning sleeve 13, a second sliding ring 14, a second connecting sleeve 15 and a third connecting sleeve 16 which are sleeved outside the sleeve; wherein, the sliding sleeve 12 is sleeved outside the second sleeve 7 and is connected with the second sleeve 7 in a sliding way, and the first positioning sleeve 11 and the second positioning sleeve 13 are respectively fixedly assembled at the upper end and the lower end of the sliding sleeve 12; the lower end of the second positioning sleeve 13 is fixedly connected with the second sliding ring 14 through threads, the second sliding ring 14 is sleeved on the periphery of the second connecting sleeve 15, the second sliding ring 14 is connected with the second connecting sleeve 15 in a sliding manner, the upper end of the second connecting sleeve 15 is provided with a retaining ring 151, and the retaining ring 151 is clamped at the upper end of the second sliding ring 14; the lower end of the second connecting sleeve 15 is fixedly connected with the third connecting sleeve 16 through threads, and an annular groove 161 is formed in the inner side wall of the third connecting sleeve 16;

the second sliding ring 14 is connected with the second connecting sleeve 15 in a sliding manner, so that the second positioning sleeve 13, the sliding sleeve 12, the second positioning sleeve 13 and the first positioning sleeve 11 which are fixedly connected with the second sliding ring 14 can rotate along the axial direction of the core rod, and the influence on the operation of other structures when the elastic sheet 9 is clamped with the side wall of the oil well is avoided; the second slip ring 14 is provided with a third opening 1401, so that a straight rod can be inserted during assembly, and the second slip ring 14 can be screwed conveniently.

The transposition structure further comprises a first sliding ring 8 and a sliding block 81 embedded in the first sliding ring 8, the first sliding ring 8 is located in the annular groove 161, and the first sliding ring 8 is connected with the second sleeve 7 and the third connecting sleeve 16 in a sliding manner; the sliding block 81 is inserted into the short indexing groove 73 or the long indexing groove 74; the transposition structure also comprises a plurality of elastic sheets 9 arranged on the periphery of the sliding sleeve 12, and the middle parts of the elastic sheets 9 protrude outwards;

further, in this embodiment, a first sliding groove 1101 and a second sliding groove 1301 are respectively formed in adjacent ends of the first positioning sleeve 11 and the second positioning sleeve 13, hook plates 901 respectively disposed at two ends of the elastic sheet 9 are respectively inserted into the first sliding groove 1101 and the second sliding groove 1301 and can slide along the axial direction of the first positioning sleeve 11 or the second positioning sleeve 13, and the hook plates 901 are limited by a first baffle 11011 disposed at an insertion end of the first sliding groove 1101 and a second baffle 13011 disposed at an insertion end of the second sliding groove 1301, so as to prevent the hook plates 901 from slipping from the first sliding groove 1101 or the second sliding groove 1301.

When the oil well anti-slip device is used, the oil well is lowered by the hand-off device, the elastic sheet 9 is in contact with the inner wall of the oil well, the sleeve moves downwards relative to the sliding sleeve due to friction force, the sliding block 81 slides upwards along the indexing groove to the inclined plane of the first indexing claw 71, and the sliding block 81 continues to slide upwards along the inclined plane of the first indexing claw 71 to the bottom end of the inclined plane; and (3) moving the releasing hand device upwards, moving the sleeve upwards relative to the sliding sleeve, and enabling the sliding block 81 to enter the indexing groove axially opposite to the sliding sleeve from the bottom end of the inclined surface of the first indexing claw 71 where the sliding block is located, namely, before the releasing hand device is lowered, the sliding block 81 is located in the indexing groove adjacent to the indexing groove, so that the switching of the sliding block 81 in the short indexing groove 73 and the long indexing groove 74 is realized.

The release device further comprises four jaws 17: the four claws 17 are positioned at the bottom end of the third connecting sleeve 16, the bottom end of the third connecting sleeve 16 is hollow, the upper ends of the four claws 17 are inserted into the hollow, the second clamping groove 1701 in the middle of the claws 17 is clamped on a positioning ring 1603 arranged on the inner side wall of the lower end of the third connecting sleeve 16, four movable holes 1601 are arranged on the hollow side wall of the third connecting sleeve 16 above the positioning ring 1603, and the upper ends of the claws 17 can be outwards extended from the movable holes 1601 and swing along the radial direction of the release device; a conical block 18 is sleeved outside the second sleeve 7 below the jaw 17, the mouth part of the conical block 18 is adjacent to the side of the jaw 17, and the jaw 17 can move to the periphery of the mouth part of the conical block 18 to prop the jaw 17 open;

further, in this embodiment, the upper end of the claw 17 is fixed with the second spring 171, the inner end of the second spring 171 is inserted into the groove 1602 arranged in the inner ring of the third connecting sleeve 16, and the second spring 171 is in a compressed state, so that the tightening force of the claw 17 can be ensured, and the clamping force of the claw 17 on the tapered block 18 can be improved; the periphery of the bottom of the claw 17 is provided with a plurality of circles of clamping teeth 1702, and the outer edges of the clamping teeth 1702 are inclined upwards, so that the friction force between the clamping teeth 1702 and the side wall of the oil well can be improved.

When the oil well, the sliding block 81 moves to the long indexing groove 74, the hand releasing device moves upwards, the sleeve is pushed by the clamping ring to fall into the first clamping groove 302, the sliding block 81 slides downwards to the clamping claw 17 to connect with the conical block 18, the hand releasing device moves upwards, the clamping ring is fixed to the conical block 18, and the core rod moves upwards alone.

The releasing device further comprises a furling structure: the folding structure comprises a sliding plate 61 fixed at the bottom end of the second core rod 6, the width of the sliding plate 61 is larger than the diameter of the second sleeve 7, two ends of the sliding plate 61 penetrate through sliding holes 75 formed in the second sleeve 7 and are inserted into a third sliding groove 162 formed in the inner side wall of the third connecting sleeve 16, the bottom of the third sliding groove 162 is open, the moving distance of the sliding plate 61 is smaller than that of a clamping block 203, and the sliding plate 61 is positioned by a positioning pin 62 inserted in the middle of the second core rod 6 and the sliding plate 61.

When the hanger 400 is used, after the hand is taken off, the core rod moves upwards to drive the sliding plate 61 to move upwards along the sliding hole 75, after the hand is taken off from the hanger 400, the core rod drives the sliding plate 61 to move upwards continuously until the sliding plate 61 abuts against the bottom of the third sliding groove 162 to drive the sliding sleeve piece and the clamping jaw 17 to move upwards, so that the clamping jaw 17 is folded inwards to be separated from the anchoring with the well wall, the core rod moves upwards continuously until the clamping block 203 abuts against the first blocking platform, the clamping jaw 17 is separated from the conical block 18, and then the core rod is lifted upwards to retract the hand-off device.

Further, in this embodiment, the upper end of the first core rod 2 is inserted into the first locking block 1, four first assembling holes 1001 are formed in the first locking block 1, four first positioning grooves 201 corresponding to the first assembling holes 1001 are formed in the first core rod 2, and the first locking block 1 and the first core rod 2 are assembled and fixed by the first tightening bolt 101; the lower extreme of second sleeve 7 is through fixed the being equipped with second latch segment 19 of threaded connection, has seted up four second screw holes 1901 on the second latch segment 19, and second ring groove 702 has been seted up to the lower extreme of second sleeve 7, and the accessible is pegged graft and is prevented that the threaded connection of second sleeve 7 and second latch segment 19 is not hard up in second screw hole 1901 and the jackscrew of second ring groove 702.

The working process is as follows:

when in use, the clamping joint 4001 of the hanger 400 is inserted into the second connecting hole 3002 of the releasing device 300 and is hooked by the hook 3003; meanwhile, the second locking block 19 is screwed into the threaded connection hole 3005 of the releasing device 300, the top cap 63 at the lower end of the core rod is inserted into the first connection hole 3001, the outer side wall of the top cap 63 abuts against the abutting head 30031 of the hook 3003, and the hook 3003 is prevented from rotating.

The connected releasing device, the releasing device 300 and the hanger 400 are lowered into the oil well by using the tool string, and after the releasing device, the releasing device 300 and the hanger 400 are lowered into place, the tool string is lifted up to perform transposition operation of the sliding block 81 in the indexing groove, so that the operation that the claw 17 is anchored on the inner wall of the oil well is completed; the tool string is lifted continuously, the first spring 32 is stressed and compressed, attention is paid to the stress condition of a tension meter on the tool string (the tension is obviously increased), the ball 34 enters the first clamping groove 302, the core rod moves upwards continuously, the top cap 63 is separated from the abutting head 30031 of the hook 3003, the hook 3003 rotates, the clamping head 4001 is separated from the hook 3003 and retracts into the hanger 400, and the roller support arm 4002 of the hanger 400 is opened and hung in an oil well. And lifting the tool string to recover the releasing device to complete the operation.

The releasing device 300 and the hanger 400 are prior art, and the internal structure and the working principle thereof can be referred to a patent CN201621301353, a hanger and a tubing positioning device and a logging assembly using the hanger.

Note: the fixing manner described herein is, if not specifically stated, a conventional fixing manner such as a screw connection, a welding, an adhesion, etc. may be used.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (5)

1. The mechanical release device of the oil pipe hanger is characterized by comprising a core rod, wherein the core rod is fixedly connected with a first core rod (2) and a second core rod (6) through a connector (4);

the release device also comprises a sleeve sleeved outside the core rod, and the sleeve slides along the axial direction of the core rod; the sleeve is fixedly connected with a first sleeve (3) and a second sleeve (7) through a first connecting sleeve (5), the top end of the first sleeve (3) is fixedly sleeved outside an assembling ring (31), and the assembling ring (31) is sleeved outside the first core rod (2) and is connected with the first core rod (2) in a sliding manner;

the releasing device further comprises a releasing structure, and the releasing structure is positioned at the upper end of the releasing device:

the releasing structure comprises a first spring (32) and a sleeve ring (33), the first spring (32) and the sleeve ring (33) are arranged between the first core rod (2) and the first sleeve (3), the upper end of the first spring (32) abuts against the assembling ring (31), the lower end of the first spring (32) abuts against the sleeve ring (33), a plurality of through holes are formed in the sleeve ring (33), balls (34) are arranged in the through holes, the balls (34) are connected with the through holes of the sleeve ring (33) in a sliding mode, and the sleeve ring (33) is connected with the first core rod (2) and the first sleeve (3) in a sliding mode;

the lower end of the lantern ring (33) abuts against the upper end of an annular boss (35) arranged on an inner ring of the first sleeve (3), the ball (34) abuts against a clamping table (202) arranged outside the first core rod (2), a first clamping groove (302) is formed in the side wall of the first sleeve (3) at the position of the first spring (32), the thickness of the clamping table (202) is smaller than the depth of the first clamping groove (302), and the depth of the first clamping groove (302) is not larger than the diameter of the ball (34);

a clamping block (203) is arranged outside the first core rod (2), and the clamping block (203) can be abutted against the annular boss (35) and the connector (4) to limit the moving distance of the core rod;

the release device further comprises a transposition structure, and the transposition structure is positioned at the lower end of the release device:

an annular partition groove (703) is formed in the outer wall of the second sleeve (7), the transposition structure comprises a first indexing claw (71) and a second indexing claw (72) which are arranged at two ends of the partition groove (703), and a plurality of indexing grooves which are arranged in the outer wall of the second sleeve (7), and the indexing grooves extend downwards from the partition groove (703); the inclined surfaces of the first indexing claw (71) and the second indexing claw (72) are opposite in inclined direction, the indexing groove is opposite to the inclined surface of the first indexing claw (71), and the inclined surface of the second indexing claw (72) is opposite to the inclined surface bottom end position of the first indexing claw (71); the indexing grooves comprise short indexing grooves (73) and long indexing grooves (74) which are arranged at intervals, and the length of the short indexing grooves (73) is smaller than that of the long indexing grooves (74);

a sliding sleeve is sleeved outside the second sleeve (7) and is connected with the second sleeve (7) in a sliding manner; the sliding sleeve is formed by assembling a first positioning sleeve (11), a sliding sleeve (12), a second positioning sleeve (13), a second sliding ring (14), a second connecting sleeve (15) and a third connecting sleeve (16) which are sleeved outside the sleeve; the sliding sleeve (12) is sleeved outside the second sleeve (7) and is connected with the second sleeve (7) in a sliding manner, and the first positioning sleeve (11) and the second positioning sleeve (13) are fixedly assembled at the upper end and the lower end of the sliding sleeve (12) respectively; the lower end of the second positioning sleeve (13) is fixedly connected with the second sliding ring (14), the second sliding ring (14) is sleeved on the periphery of the second connecting sleeve (15), the second sliding ring (14) is connected with the second connecting sleeve (15) in a sliding manner, a retaining ring (151) is arranged at the upper end of the second connecting sleeve (15), and the retaining ring (151) is clamped at the upper end of the second sliding ring (14); the lower end of the second connecting sleeve (15) is fixedly connected with a third connecting sleeve (16), and an annular groove (161) is formed in the inner side wall of the third connecting sleeve (16);

the transposition structure further comprises a first sliding ring (8) and a sliding block (81) embedded in the first sliding ring (8), the first sliding ring (8) is located in an annular groove (161), and the first sliding ring (8) is connected with the second sleeve (7) and the third connecting sleeve (16) in a sliding mode; the sliding block (81) is inserted into the short indexing groove (73) or the long indexing groove (74); the transposition structure further comprises a plurality of elastic sheets (9) arranged on the periphery of the sliding sleeve (12), and the middle parts of the elastic sheets (9) are outwards protruded;

the release device also comprises a plurality of claws (17): the clamping jaws (17) are located at the bottom end of the third connecting sleeve (16), the bottom end of the third connecting sleeve (16) is hollow, the upper ends of the four clamping jaws (17) are inserted into the hollow position, a second clamping groove (1701) in the middle of each clamping jaw (17) is clamped with a positioning ring (1603) arranged on the inner side wall of the lower end of the third connecting sleeve (16), four movable holes (1601) are formed in the hollow side wall of the third connecting sleeve (16) above each positioning ring (1603), and the upper ends of the clamping jaws (17) can outwards extend from the movable holes (1601) and swing along the radial direction of the release device; a conical block (18) is sleeved outside the second sleeve (7) below the clamping jaw (17), the mouth part of the conical block (18) is adjacent to the side where the clamping jaw (17) is located, and the clamping jaw (17) can move to the periphery of the mouth part of the conical block (18) to prop the clamping jaw (17) open;

the releasing device further comprises a furling structure: the furling structure comprises a sliding plate (61) fixed at the bottom end of the second core rod (6), the width of the sliding plate (61) is larger than the diameter of the second sleeve (7), two ends of the sliding plate (61) penetrate through sliding holes (75) formed in the second sleeve (7) and are inserted into a third sliding groove (162) formed in the inner side wall of a third connecting sleeve (16), the bottom of the third sliding groove (162) is provided with an opening, and the moving distance of the sliding plate (61) is smaller than the moving distance of the clamping block (203).

2. The mechanical release handle device of a tubing hanger of claim 1, wherein: the width of the clamping table (202) is smaller than the moving distance of the clamping block (203), the clamping table (202) can move from the upper part of the first clamping groove (302) to the lower part of the first clamping groove (302), and the balls (34) are clamped at a first clamping end (2021) and a second clamping end (2022) of the clamping table (202) respectively.

3. The mechanical release handle device of a tubing hanger of claim 1, wherein: adjacent ends of the first positioning sleeve (11) and the second positioning sleeve (13) are respectively provided with a first sliding groove (1101) and a second sliding groove (1301), hook plates (901) arranged at two ends of the elastic sheet (9) are respectively inserted into the first sliding groove (1101) and the second sliding groove (1301) and can slide along the axial direction of the first positioning sleeve (11) or the second positioning sleeve (13), the insertion end of the first sliding groove (1101) is provided with a first baffle (11011), and the insertion end of the second sliding groove (1301) is provided with a second baffle (13011).

4. The mechanical release handle device of a tubing hanger of claim 1, wherein: a second spring (171) is arranged between the clamping jaw (17) and the sliding sleeve piece, and the second spring (171) is positioned at the upper end of the clamping jaw (17) and is in a compressed state; the periphery of the bottom of the clamping jaw (17) is provided with a plurality of circles of clamping teeth (1702), and the outer edges of the clamping teeth (1702) incline upwards.

5. The mechanical release handle device of a tubing hanger of claim 1, wherein: the top end of the first core rod (2) is fixedly provided with a first locking block (1); the lower end of the second sleeve (7) is fixedly provided with a second locking block (19); and a top cap (63) is fixed on the periphery of the bottom end of the first core rod (2).

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