CN111577167A

CN111577167A - Multifunctional power slip

Info

Publication number: CN111577167A
Application number: CN202010563746.9A
Authority: CN
Inventors: 王春垒; 范晓贤; 沈君芳; 宫树战; 袁德章; 吕海龙; 赵长增
Original assignee: Shengli Oilfield Shengji Petroleum Equipment Co Ltd
Current assignee: Shengli Oilfield Shengji Petroleum Equipment Co Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2020-08-25

Abstract

The invention provides a multifunctional power slip, and relates to the technical field of oil wells. The multifunctional power slip comprises a base body, a driving piece, a slip and a lifter; the base body is provided with a first channel for the pipe column to pass through; the slips are arranged in the seat body, the driving piece is in transmission connection with the slips, and the slips can clamp or loosen the tubular column under the driving of the driving piece; the riser sets up on the pedestal, is provided with the second passageway that supplies the tubular column to pass through on the riser, and the roof of riser can reciprocate relatively the pedestal. The technical effect of facilitating the withdrawal of the elevator is achieved.

Description

Multifunctional power slip

Technical Field

The invention relates to the technical field of oil wells, in particular to a multifunctional power slip.

Background

Along with the increasing demand of oil fields on reducing the labor intensity and improving the operation safety, fully-automatic operation equipment is gradually popularized and applied. The demand of the power slip as a matching tool for operation is increasing day by day. The power slip is a tool which is arranged on a wellhead platform and used for clamping and fixing a pipe column in the operation process. The power slip is developed towards multifunctional integration and miniaturization on the premise of perfect core functions.

In the automatic operation of the oil field, the elevator falls on the power slip in the process of lowering the pipe column. After the power slips grip the string, some of the gravity is still carried by the elevator and the elevator is too close to the contact surface of the slips. This can lead to elevator evacuation difficulties that severely impact the efficiency of the automated equipment. The hook needs to be lifted up when the elevator is withdrawn, so that the operation procedures are increased, and the efficiency is reduced.

Therefore, it is an important technical problem to provide a multifunctional power slip for conveniently withdrawing an elevator.

Disclosure of Invention

The invention aims to provide a multifunctional power slip to solve the technical problem that an elevator is inconvenient to withdraw in the prior art.

In a first aspect, an embodiment of the present invention provides a multifunctional power slip, including a seat, a driving element, a slip and a lifter;

the base body is provided with a first channel for the pipe column to pass through;

the slips are arranged in the seat body, the driving piece is in transmission connection with the slips, and the slips can clamp or loosen a tubular column under the driving of the driving piece;

the riser is arranged on the base body, a second channel for the pipe column to pass through is arranged on the riser, and the top plate of the riser can move up and down relative to the base body.

In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the lifter includes an annular piston cylinder and an annular piston;

the annular piston cylinder is fixedly arranged at the top of the seat body;

the annular piston is arranged in the annular piston cylinder and is fixedly connected with the top plate.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the second passage is formed by an intermediate blank space of the annular piston cylinder.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the lifter includes a cylindrical piston and a cylindrical piston cylinder disposed on the seat body;

the columnar piston is arranged in the columnar piston cylinder and is fixedly connected with the top plate through a piston rod.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein an outer cover is disposed at a top of the cylindrical piston cylinder, an elastic resetting member is sleeved on the piston rod, one end of the elastic resetting member abuts against the cylindrical piston, and the other end of the elastic resetting member abuts against the outer cover.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the columnar piston cylinder is a bidirectional piston cylinder.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the number of the above-mentioned cylindrical pistons is multiple, and the multiple cylindrical pistons are uniformly distributed along a circumferential direction of the first passage.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the multifunctional power slip further includes a self-sealing rubber core, and inner diameters of the first channel and the second channel are not smaller than an outer diameter of the self-sealing rubber core;

and the first channel is internally provided with a mounting seat for mounting the self-sealing rubber core.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a side wall of the seat body is provided with a mounting hole, and an axis of the mounting hole is perpendicular to an axis of the self-sealing rubber core;

and a limiting part used for limiting the self-sealing rubber core to be separated from the mounting seat is arranged in the mounting hole.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the limiting member is a jackscrew.

Has the advantages that:

the embodiment of the invention provides a multifunctional power slip which comprises a base body, a driving piece, a slip and a lifter, wherein the base body is provided with a driving piece; the base body is provided with a first channel for the pipe column to pass through; the slips are arranged in the seat body, the driving piece is in transmission connection with the slips, and the slips can clamp or loosen the tubular column under the driving of the driving piece; the riser sets up on the pedestal, is provided with the second passageway that supplies the tubular column to pass through on the riser, and the roof of riser can reciprocate relatively the pedestal.

When the lifting device works, the pipe column can be put into or taken out of an oil well along the first channel of the base body and the second channel of the lifter, and the lifter can drive the top plate to move up and down relative to the base body in the putting-in or taking-out process, so that the elevator is conveniently and quickly withdrawn in a yielding mode in the well repairing operation process, and the well repairing operation efficiency can be obviously improved. For example, when a pipe column is put in, the elevator drives the top plate to ascend, the elevator drives the pipe column to fall into the second channel and the first channel, then the elevator falls onto the top plate, at the moment, all the weight of the elevator and the pipe column falls onto the top plate, then the driving piece pushes the slip to clamp the pipe column, before the elevator lifts the pipe column again, the slip can continuously hold the pipe column, then the top plate of the elevator descends, at the moment, the elevator can descend for a short distance, in the descending process, the pipe column can continuously fall for a short distance under the action of gravity until the slip completely holds the pipe column, and the top plate of the elevator descends to the lowest position, at the moment, a yielding space can be formed between the top plate and the elevator, so that the elevator can be overturned to give way for withdrawal, and the next pipe column is hung.

Drawings

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

FIG. 1 is a schematic diagram of the overall structure of a first implementation of a multi-function power slip according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a first embodiment of a multi-function power slip provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a first embodiment of a multi-function power riser in slips provided by an example of the present invention;

FIG. 4 is a cross-sectional view of a second embodiment of a multi-function power slip according to an embodiment of the present invention.

Icon:

100-a seat body; 110-a mount; 120-mounting holes; 130-a limit piece;

200-a driver;

300-slips;

400-a lifter; 410-a top plate; 420-an annular piston cylinder; 430-annular piston; 431-cylindrical piston; 440-a cylindrical piston cylinder; 450-outer cover; 460-a resilient return member;

500-linkage mechanism;

600-self-sealing rubber core.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" 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" or "second" 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 specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

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

Referring to fig. 1, 2 and 3, an embodiment of the invention provides a multifunctional power slip, which includes a seat 100, a driving member 200, a slip 300 and a lifter 400; the base 100 is provided with a first channel for the pipe column to pass through; the slips 300 are arranged in the base body 100, the driving piece 200 is in transmission connection with the slips 300, and the slips 300 can clamp or loosen a pipe string under the driving of the driving piece 200; the elevator 400 is disposed on the base 100, and the elevator 400 is provided with a second passage through which the column passes, and the top plate 410 of the elevator 400 can move up and down with respect to the base 100.

During operation, a pipe column can be lowered into or lifted out of an oil well along the first channel of the base body 100 and the second channel of the lifter 400, and the lifter 400 can drive the top plate 410 to move up and down relative to the base body 100 in the lowering or lifting process, so that the elevator is conveniently and quickly moved out of the way in the well repairing operation process, and the well repairing operation efficiency can be obviously improved. For example, when a tubular string is put in, the elevator 400 drives the top plate 410 to ascend, the elevator drives the tubular string to fall into the second channel and the first channel, the elevator falls on the top plate 410, at the moment, the total weight of the elevator and the tubular string falls on the top plate 410, then the driving piece 200 pushes the slips 300 to clamp the tubular string, before the elevator lifts the tubular string again, the slips 300 can continuously hold the tubular string, then the top plate 410 of the elevator 400 descends, at the moment, the elevator descends for a short distance, in the descending process, the tubular string can continuously fall for a short distance under the action of gravity until the slips 300 completely hold the tubular string, and the top plate 410 of the elevator 400 descends to the lowest position, at the moment, a yielding space can be formed between the top plate 410 and the elevator, so that the elevator can overturn and withdraw, and hang the next tubular string.

Specifically, in the actual production process, the elevator is driven by the hook through the hanging ring, and after the elevator lifts the tubular column into or out of the multifunctional power slip, the lifter 400 can drive the top plate 410 to descend, so that the elevator can be moved away, and the elevator can be easily turned over and withdrawn.

In the process of pulling out the tubular column: the upper end of the slip 300 is provided with a coupling positioner which is matched with the slip 300 for use, then the elevator 400 drives the top plate 410 to ascend to the highest position, then the elevator lifts a pipe column, the coupling positioner moves forwards and stops on the top plate 410, then the elevator falls, a coupling at the lower end of the pipe column falls on the coupling positioner, at the moment, the weight falls on the top plate 410, then the driving piece 200 drives the slip 300 to close, the slip 300 embraces the pipe column, the elevator 400 drives the top plate 410 to descend, the pipe column continues to move downwards for a short distance under the action of gravity, then the elevator 400 drives the top plate 410 to descend to the lowest position, then the coupling positioner retracts, then the threads between the pipe column and the coupling are loosened through hydraulic clamp shackle, then the hook and the lifting ring drive the elevator to lift and put down the pipe column, the hook and the lifting ring drive the elevator to fall to lift a pipe, and simultaneously the elevator 400 drives the top plate 410 to ascend, a new cycle is started.

Referring to fig. 1, 2 and 3, in an alternative to the present embodiment, the elevator 400 includes an annular piston cylinder 420 and an annular piston 430; the annular piston cylinder 420 is fixedly arranged at the top of the seat body 100; the annular piston 430 is disposed within the annular piston cylinder 420, and the annular piston 430 is fixedly coupled to the top plate 410.

Specifically, the lifter 400 includes an annular piston cylinder 420 that can be independently disposed on the top of the seat body 100, an annular piston 430 is disposed in the annular piston cylinder 420, and the upper and lower positions of the annular piston 430 are controlled by hydraulic oil.

The annular piston 430 is fixedly connected with the top plate 410, and the annular piston 430 can push the top plate 410 to move up and down when moving in the annular piston cylinder 420.

An outer cover 450 is disposed at an outlet of the annular piston cylinder 420 to protect the annular piston 430 and prevent the annular piston 430 from being separated from the annular piston cylinder 420.

It should be noted that, by using the independent annular piston cylinder 420, the power slip of the existing oil well can be modified, and the annular piston cylinder 420 is directly fixed on the top of the seat body 100, without modifying the seat body 100, the driving member 200, the slip 300 and other components.

The oil cylinder formed by the annular piston cylinder 420 and the annular piston 430 is a bidirectional cylinder, a first oil port is formed in the bottom of the annular piston cylinder 420, a second oil port is formed in the upper portion of the annular piston cylinder 420, and the annular piston 430 can be driven to move up and down through hydraulic oil.

Referring to fig. 1, 2 and 3, in an alternative to this embodiment, the intermediate blank space of the annular piston cylinder 420 forms the second passage.

Specifically, the blank area of the inner ring of the annular piston cylinder 420 forms a second passage through which the tubing string passes.

Referring to fig. 4, in an alternative embodiment, the lifter 400 includes a cylindrical piston 431 and a cylindrical piston cylinder 440 opened on the housing 100; the columnar piston 431 is arranged in the columnar piston cylinder 440, and the columnar piston 431 is fixedly connected with the top plate 410 through a piston rod; the top of the cylindrical piston cylinder 440 is provided with an outer cover 450, the piston rod is sleeved with an elastic resetting piece 460, one end of the elastic resetting piece 460 is abutted to the cylindrical piston 431, and the other end of the elastic resetting piece is abutted to the outer cover 450.

Wherein, the columnar piston cylinder 440 can also adopt a bidirectional piston cylinder.

Specifically, the lifter 400 may further adopt a cylindrical piston cylinder 440 provided on the seat body 100, and the cylindrical piston 431 is provided in the cylindrical piston cylinder 440, and under the action of hydraulic oil, the position of the cylindrical piston 431 in the cylindrical piston cylinder 440 may be controlled.

In addition, the piston rod is sleeved with an elastic resetting piece 460, and when the top plate 410 is required to descend, the elastic resetting piece 460 and the top plate 410 can reset through self weight.

It should be noted that, through setting up columnar piston cylinder 440 on pedestal 100, can be applicable to the occasion that has the restriction to whole machine height, arrange the oil circuit hole inside pedestal 100 simultaneously, saved external drive pipeline, reduced the pipeline leakage point, the more succinct maintenance of being convenient for of outward appearance moreover.

Wherein, the elastic restoring member 460 may adopt a compression spring.

The cylinder formed by the columnar piston cylinder 440 and the columnar piston 431 can be a one-way cylinder, the lifting of the columnar piston 431 is driven by hydraulic oil, and the descending of the columnar piston 431 is driven by the self weight of the elastic resetting piece 460 and the top plate 410; the oil cylinder formed by the columnar piston cylinder 440 and the columnar piston 431 can also be a bidirectional cylinder, and the ascending and descending of the columnar piston 431 are driven by hydraulic oil.

Referring to fig. 1, 2, 3, and 4, in an alternative of the present embodiment, the number of the cylindrical pistons 431 is plural, and the plural cylindrical pistons 431 are uniformly distributed in the circumferential direction of the first passage.

Specifically, the lifter 400 is provided with a plurality of cylindrical pistons 431, so that the pressure applied to a single cylindrical piston 431 can be reduced, the service life of the cylindrical piston 431 can be prolonged, and the stability of the top plate 410 can be improved.

Referring to fig. 2, in an alternative of this embodiment, the multifunctional power slip further includes a self-sealing rubber core 600, and the inner diameters of the first channel and the second channel are not smaller than the outer diameter of the self-sealing rubber core 600; the first channel is provided with a mounting seat 110 for mounting the self-sealing rubber core 600.

Specifically, the inner diameters of the first channel and the second channel are not smaller than the outer diameter of the self-sealing rubber core 600, so that the self-sealing rubber core 600 can smoothly pass through the first channel and the second channel, and the self-sealing rubber core 600 can be rapidly taken out and replaced.

In prior art's operation in-process, install on the well head from sealing the well ware, lie in below the operation platform from sealing the well ware, from sealing gluey core 600 of sealing in the well ware belongs to the consumption piece, easy wearing and tearing, when sealing gluey core 600 and damaging, need remove the power slips on the operation platform, and need remove the operation platform, then change from sealing gluey core 600, it is hard to take trouble, need stop for a long time moreover, cause great economic loss. In the multifunctional power slip provided by this embodiment, the installation seat 110 for installing the self-sealing rubber core 600 is arranged in the first channel of the seat body 100, so that the self-sealing rubber core 600 can be installed in the seat body 100, and when the self-sealing rubber core 600 is damaged and needs to be replaced, the operation platform and the multifunctional power slip do not need to be moved.

Referring to fig. 2, in an alternative of this embodiment, a mounting hole 120 is formed in a side wall of the seat body 100, and an axis of the mounting hole 120 is perpendicular to an axis of the self-sealing rubber core 600; the mounting hole 120 is provided therein with a limiting member 130 for limiting the separation of the self-sealing rubber core 600 from the mounting seat 110.

Specifically, when need to be changed and seal gluey core 600, take out locating part 130 in the mounting hole 120 outwards earlier, make and seal gluey core 600 and can move along the first passageway of pedestal 100 from, then open slips 300 through driving piece 200, open the back completely when slips 300, lift the tubular column, seal gluey core 600 from can taking out multi-functional power slips by the tubular column, rise to the position of convenient inspection and change on the platform, then driving piece 200 drive slips 300 closes, hold the tubular column tightly, the staff can inspect and change sealing gluey core 600 from.

Wherein, the mounting hole 120 may be a threaded through hole.

In an alternative of this embodiment, the limiting member 130 is a jackscrew.

Specifically, the limiting member 130 may be a jackscrew, which is convenient to operate, the jackscrew is in threaded connection with the mounting hole 120, when the self-sealing rubber core 600 is fixed, the jackscrew is screwed in, and one end of the jackscrew protruding out of the inner wall of the seat body 100 can form a constraint on the self-sealing rubber core 600.

Referring to fig. 1, 2 and 4, in an alternative to this embodiment, the driving member 200 is connected to the slips 300 by a linkage 500.

Specifically, the driving member 200 drives the slips 300 to move through the link mechanism 500, and when the driving member 200 works, the link mechanism 500 is driven to move, so that the slips 300 are driven to hold the pipe string tightly.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-functional power slip, comprising: the device comprises a base body (100), a driving element (200), slips (300) and a lifter (400);

a first channel for the pipe column to pass through is formed in the base body (100);

the slips (300) are arranged in the seat body (100), the driving piece (200) is in transmission connection with the slips (300), and the slips (300) can clamp or release a pipe column under the driving of the driving piece (200);

the lifting device (400) is arranged on the base body (100), a second channel for the pipe column to pass through is arranged on the lifting device (400), and a top plate (410) of the lifting device (400) can move up and down relative to the base body (100).

2. The multi-functional power slip of claim 1, wherein the riser (400) comprises an annular piston cylinder (420) and an annular piston (430);

the annular piston cylinder (420) is fixedly arranged at the top of the seat body (100);

the annular piston (430) is arranged in the annular piston cylinder (420), and the annular piston (430) is fixedly connected with the top plate (410).

3. The multi-functional power slip of claim 2, wherein an intermediate blank space of the annular piston cylinder (420) forms the second channel.

4. The multi-functional power slip of claim 1, wherein the riser (400) comprises a cylindrical piston (431) and a cylindrical piston cylinder (440) disposed on the retainer body (100);

the cylindrical piston (431) is arranged in the cylindrical piston cylinder (440), and the cylindrical piston (431) is fixedly connected with the top plate (410) through a piston rod.

5. The multifunctional power slip of claim 4, wherein an outer cover (450) is arranged on the top of the cylindrical piston cylinder (440), an elastic resetting piece (460) is sleeved on the piston rod, one end of the elastic resetting piece (460) is abutted with the cylindrical piston (431), and the other end of the elastic resetting piece is abutted with the outer cover (450).

6. The multi-functional power slip of claim 4, wherein the cylindrical piston cylinder (440) is a bi-directional piston cylinder.

7. A multi-functional power slip according to claim 4, wherein the number of the cylindrical pistons (431) is plural, and the plural cylindrical pistons (431) are evenly distributed circumferentially along the first channel.

8. The multi-functional power slip of claim 1, further comprising a self-sealing plug (600), wherein the first and second passages each have an inner diameter that is no less than an outer diameter of the self-sealing plug (600);

and a mounting seat (110) for mounting the self-sealing rubber core (600) is arranged in the first channel.

9. The multifunctional power slip of claim 8, wherein the side wall of the seat body (100) is provided with a mounting hole (120), and the axis of the mounting hole (120) is perpendicular to the axis of the self-sealing rubber core (600);

a limiting piece (130) used for limiting the self-sealing rubber core (600) to be separated from the mounting base (110) is arranged in the mounting hole (120).

10. The multi-functional power slip of claim 9, wherein the retaining member (130) is a jackscrew.