Multifunctional Power Slips

Abstract

The present invention provides a multifunctional power slip, which relates to the technical field of oil wells. The multifunctional power slip comprises a seat body, a driving member, a slip and an elevator; a first passage for a pipe string to pass through is provided on the seat body; the slip is arranged in the seat body, the driving member is in transmission connection with the slip, and the slip can clamp or loosen the pipe string under the driving of the driving member; the elevator is arranged on the seat body, a second passage for a pipe string to pass through is provided on the elevator, and a top plate of the elevator can move up and down relative to the seat body. The technical effect of facilitating the withdrawal of the elevator is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of oil wells, in particular to multifunctional power slips. Background Art

[0002] As the need for oilfields to reduce labor intensity and improve safety is becoming more urgent, fully automated operating equipment is gradually being promoted and applied. As a supporting tool for operations, the demand for power slips is also increasing day by day. Power slips are tools installed on the wellhead platform during operations to clamp and fix the pipe. On the premise of improving the core functions, power slips are developing in the direction of multi-functional integration and miniaturization.

[0003] In oilfield automation operations, during the process of lowering the pipe string, the elevator falls on the power slips. After the power slips hold the pipe string tightly, part of the gravity is still borne by the elevator, and the contact surface between the elevator and the slips is too close. This will make it difficult to withdraw the elevator, seriously affecting the efficiency of the automation equipment. To withdraw the elevator, you need to lift the big hook, which increases the operation process and reduces efficiency.

[0004] Therefore, providing a multifunctional power slip for conveniently withdrawing the elevator becomes an important technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a multifunctional power slip to alleviate the technical problem of inconvenience in withdrawing the elevator in the prior art.

[0006] In a first aspect, an embodiment of the present invention provides a multifunctional power slip, including a seat body, a driving member, a slip and a lifter;

[0007] The seat body is provided with a first passage for the pipe column to pass through;

[0008] The slips are arranged in the seat body, the driving member is in driving connection with the slips, and the slips can clamp or loosen the pipe string under the driving of the driving member;

[0009] The lifter is arranged on the seat body, and a second passage for the pipe column to pass through is arranged on the lifter. The top plate of the lifter can move up and down relative to the seat body.

[0010] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the lifter comprises an annular piston cylinder and an annular piston;

[0011] The annular piston cylinder is fixedly arranged on the top of the seat body;

[0012] The annular piston is arranged in the annular piston cylinder, and the annular piston is fixedly connected to the top plate.

[0013] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the middle blank area of ​​the annular piston cylinder forms the second channel.

[0014] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the lifter comprises a columnar piston and a columnar piston cylinder disposed on the seat body;

[0015] The columnar piston is arranged in the columnar piston cylinder, and the columnar piston is fixedly connected to the top plate through a piston rod.

[0016] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein an outer cover is provided on the top of the above-mentioned columnar piston cylinder, an elastic return member is sleeved on the piston rod, one end of the elastic return member abuts against the columnar piston, and the other end abuts against the outer cover.

[0017] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the above-mentioned columnar piston cylinder adopts a bidirectional piston cylinder.

[0018] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the number of the above-mentioned columnar pistons is multiple, and the multiple columnar pistons are evenly distributed along the circumference of the first channel.

[0019] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the multifunctional power slip further comprises a self-sealing rubber core, and the inner diameters of the first channel and the second channel are not less than the outer diameter of the self-sealing rubber core;

[0020] A mounting seat for mounting the self-sealing rubber core is arranged in the first channel.

[0021] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a mounting hole is provided on the side wall of the seat body, and the axis of the mounting hole is perpendicular to the axis of the self-sealing rubber core;

[0022] A limiting member for limiting the self-sealing rubber core from being separated from the mounting seat is arranged in the mounting hole.

[0023] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the above-mentioned limiting member adopts a top screw.

[0024] Beneficial effects:

[0025] An embodiment of the present invention provides a multifunctional power cava, including a seat body, a driving member, a cava and a lifter; a first channel for a pipe column to pass through is opened on the seat body; the cava is arranged in the seat body, the driving member is transmission-connected to the cava, and the cava can clamp or loosen the pipe column under the drive of the driving member; the lifter is arranged on the seat body, a second channel for the pipe column to pass through is arranged on the lifter, and a top plate of the lifter can move up and down relative to the seat body.

[0026] During operation, the pipe string can be lowered into or pulled out of the oil well along the first channel of the seat body and the second channel of the lifter. During the lowering or pulling out process, the lifter can drive the top plate to move up and down relative to the seat body, so that the elevator can be easily and quickly made to give way and withdraw during the well repair operation, which can significantly improve the efficiency of the well repair operation. For example, when the pipe string is lowered, the lifter drives the top plate to rise, and the elevator with the pipe string falls into the second channel and the first channel, and then the elevator falls on the top plate. At this time, the total weight of the elevator and the pipe string falls on the top plate, and then the driving member pushes the slip to clamp the pipe string. Before the elevator lifts the pipe string again, the slip will continue to hold the pipe string, and then the top plate of the lifter will drop, and the elevator will drop a short distance. During the descent process, the pipe string will continue to drop a short distance under the action of gravity until the slip completely holds the pipe string and the top plate of the lifter drops to the lowest point. At this time, a space for making way will be formed between the top plate and the elevator, so that the elevator can flip to give way and withdraw, and go to hang a pipe string. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the overall structure of a first implementation mode of the multifunctional power slips provided in an embodiment of the present invention;

[0029] Figure 2 A cross-sectional view of a first embodiment of the multifunctional power slips provided in an embodiment of the present invention;

[0030] Figure 3 A cross-sectional view of a first embodiment of a lifter in a multifunctional power slip provided in an embodiment of the present invention;

[0031] Figure 4 A cross-sectional view of a second embodiment of the multifunctional power slips provided in an embodiment of the present invention.

[0032] icon:

[0033] 100 - seat body; 110 - mounting seat; 120 - mounting hole; 130 - limiter;

[0034] 200 - driving element;

[0035] 300 - kava;

[0036] 400 - lifter; 410 - top plate; 420 - annular piston cylinder; 430 - annular piston; 431 - columnar piston; 440 - columnar piston cylinder; 450 - outer cover; 460 - elastic reset member;

[0037] 500 - connecting rod mechanism;

[0038] 600-Self-sealing rubber core. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0044] See also Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a multifunctional power cava, including a base body 100, a driving member 200, a cava 300 and a lifter 400; a first channel for a pipe string to pass through is opened on the base body 100; the cava 300 is arranged in the base body 100, the driving member 200 is transmission-connected with the cava 300, and the cava 300 can clamp or loosen the pipe string under the drive of the driving member 200; the lifter 400 is arranged on the base body 100, and a second channel for a pipe string to pass through is arranged on the lifter 400, and a top plate 410 of the lifter 400 can move up and down relative to the base body 100.

[0045] During operation, the pipe string can be lowered into or pulled out of the oil well along the first channel of the seat body 100 and the second channel of the elevator 400. During the lowering or pulling out process, the elevator 400 can drive the top plate 410 to move up and down relative to the seat body 100, so that during the well repair operation, the lifting card can be easily and quickly given way and withdrawn, which can significantly improve the efficiency of the well repair operation. For example, when lowering a pipe string, the elevator 400 drives the top plate 410 to rise, and the elevator carries the pipe string into the second channel and the first channel, and then the elevator falls on the top plate 410. At this time, the entire weight of the elevator and the pipe string falls on the top plate 410, and then the driving member 200 pushes the slips 300 to clamp the pipe string. Before the elevator lifts the pipe string again, the slips 300 will continue to hold the pipe string, and then the top plate 410 of the elevator 400 will drop, at which point the elevator will drop a short distance. During the descent, the pipe string will continue to drop a short distance under the action of gravity until the slips 300 completely hold the pipe string and the top plate 410 of the elevator 400 drops to the lowest point. At this time, a clearance space will be formed between the top plate 410 and the elevator, so that the elevator can flip over to make way and withdraw, and then hang the next pipe string.

[0046] Specifically, in the actual production process, the elevator is driven by the big hook through the lifting ring. When the elevator lifts the pipe column into or out of the multifunctional power slip, the lifter 400 can drive the top plate 410 to descend, thereby making way for the elevator, so that the elevator can be easily flipped and withdrawn.

[0047] In the process of pulling out the pipe string: there is a coupling locator at the upper end of the slip 300, which is used in conjunction with the slip 300, and then the lifter 400 drives the top plate 410 to rise to the highest position, and then the elevator lifts a pipe string, the coupling locator moves forward and stops on the top plate 410, and then the elevator falls, and the coupling at the lower end of the pipe string falls on the coupling locator. At this time, the weight falls on the top plate 410, and then the driving member 200 drives the slip 300 to close, the slip 300 holds the pipe string, and the lifter 400 drives the top plate 410 down, and the pipe string will continue to move down a short distance under the action of gravity. Then the lifter 400 drives the top plate 410 down to the lowest position, and then the coupling locator retracts, and then the hydraulic clamp is used to unfasten the buckle to loosen the thread between the pipe string and the coupling. Then the big hook and the lifting ring drive the elevator to lift and put down the pipe string. The big hook and the lifting ring bring the elevator down to lift the next pipe. At the same time, the lifter 400 drives the top plate 410 up, starting a new cycle.

[0048] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, the lifter 400 includes an annular piston cylinder 420 and an annular piston 430; the annular piston cylinder 420 is fixedly arranged on 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 to the top plate 410.

[0049] Specifically, the lifter 400 includes an annular piston cylinder 420 that can be independently arranged on the top of the seat body 100. An annular piston 430 is arranged in the annular piston cylinder 420, and the up and down positions of the annular piston 430 are controlled by hydraulic oil.

[0050] The annular piston 430 is fixedly connected to the top plate 410 , and when the annular piston 430 moves in the annular piston cylinder 420 , it can push the top plate 410 to move up and down.

[0051] An outer cover 450 is provided at the outlet of the annular piston cylinder 420 to protect the annular piston 430 and prevent the annular piston 430 from escaping from the annular piston cylinder 420 .

[0052] It should be pointed out that by adopting an independent annular piston cylinder 420, the power slips of existing oil wells can be modified by directly fixing the annular piston cylinder 420 on the top of the seat body 100, without modifying the seat body 100, the drive member 200, the slips 300 and other components.

[0053] The oil cylinder formed by the annular piston cylinder 420 and the annular piston 430 is a bidirectional cylinder, a first oil port is provided at the bottom of the annular piston cylinder 420, and a second oil port is provided at the top of the annular piston cylinder 420, and the annular piston 430 can be driven to move up and down by hydraulic oil.

[0054] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, the middle blank area of ​​the annular piston cylinder 420 forms a second channel.

[0055] Specifically, the blank area of ​​the inner circle of the annular piston cylinder 420 forms a second channel, and the second channel is for the pipe string to pass through.

[0056] See also Figure 4 As shown, in an optional scheme of this embodiment, the lifter 400 includes a cylindrical piston 431 and a cylindrical piston cylinder 440 opened on the base body 100; the cylindrical piston 431 is arranged in the cylindrical piston cylinder 440, and the cylindrical piston 431 is fixedly connected to the top plate 410 through a piston rod; an outer cover 450 is provided on the top of the cylindrical piston cylinder 440, and an elastic return member 460 is sleeved on the piston rod, one end of the elastic return member 460 abuts against the cylindrical piston 431, and the other end abuts against the outer cover 450.

[0057] The columnar piston cylinder 440 may also be a bidirectional piston cylinder.

[0058] Specifically, the lifter 400 may also adopt a columnar piston cylinder 440 opened on the base body 100, and the columnar piston 431 is arranged in the columnar piston cylinder 440. Under the action of hydraulic oil, the position of the columnar piston 431 in the columnar piston cylinder 440 can be controlled.

[0059] In addition, an elastic reset member 460 is sleeved on the piston rod, and when the top plate 410 needs to be lowered, it can be reset by the elastic reset member 460 and the self-weight of the top plate 410.

[0060] It should be pointed out that by setting the columnar piston cylinder 440 on the base body 100, it can be applied to occasions where the height of the entire machine is restricted. At the same time, the oil circuit hole is arranged inside the base body 100, eliminating the external drive pipeline, reducing pipeline leakage points, and the appearance is simpler and easier to maintain.

[0061] The elastic reset member 460 may be a compression spring.

[0062] Among them, the oil cylinder composed of 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 descent of the columnar piston 431 is driven by the elastic reset part 460 and the dead weight of the top plate 410; the oil cylinder composed of the columnar piston cylinder 440 and the columnar piston 431 can also be a two-way cylinder, and the rise and fall of the columnar piston 431 are all driven by hydraulic oil.

[0063] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in an optional solution of this embodiment, there are multiple columnar pistons 431, and the multiple columnar pistons 431 are evenly distributed along the circumference of the first channel.

[0064] Specifically, the lifter 400 is provided with a plurality of columnar pistons 431 , which can reduce the pressure on a single columnar piston 431 , increase the service life of the columnar piston 431 , and improve the stability of the top plate 410 .

[0065] See also Figure 2 As shown, in an optional scheme of this embodiment, the multifunctional power cava also includes a self-sealing rubber core 600, and the inner diameters of the first channel and the second channel are not less than the outer diameter of the self-sealing rubber core 600; a mounting seat 110 for mounting the self-sealing rubber core 600 is provided in the first channel.

[0066] Specifically, the inner diameters of the first channel and the second channel are not less 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, so that the self-sealing rubber core 600 can be quickly taken out and replaced.

[0067] In the operation process of the prior art, a self-sealing well sealer is installed on the wellhead, and the self-sealing well sealer is located below the working platform. The self-sealing rubber core 600 in the self-sealing well sealer is a consumable part and is easy to wear. When the self-sealing rubber core 600 is damaged, the power slip on the working platform needs to be removed, and the working platform needs to be moved, and then the self-sealing rubber core 600 needs to be replaced, which is time-consuming and laborious, and requires a long period of downtime, causing great economic losses. In the multifunctional power slip provided in this embodiment, by providing a mounting seat 110 for mounting the self-sealing rubber core 600 in the first channel of the seat body 100, the self-sealing rubber core 600 can be installed in the seat body 100. When the self-sealing rubber core 600 is damaged and needs to be replaced, there is no need to move the working platform and the multifunctional power slip.

[0068] See also Figure 2As shown, in an optional scheme of this embodiment, a mounting hole 120 is opened on the side wall of the seat body 100, and the axis of the mounting hole 120 is perpendicular to the axis of the self-sealing rubber core 600; a limiting member 130 is arranged in the mounting hole 120 for limiting the self-sealing rubber core 600 from detaching from the mounting seat 110.

[0069] Specifically, when the self-sealing rubber core 600 needs to be replaced, the limiting piece 130 in the mounting hole 120 is first taken outward so that the self-sealing rubber core 600 can move along the first channel of the seat body 100, and then the cava 300 is opened by the driving piece 200. When the cava 300 is fully opened, the pipe column is lifted, and the self-sealing rubber core 600 can be brought out of the multifunctional power cava by the pipe column and raised to a position on the platform for convenient inspection and replacement. Then the driving piece 200 drives the cava 300 to close and hold the pipe column tightly, and the staff can inspect and replace the self-sealing rubber core 600.

[0070] The mounting hole 120 may be a threaded through hole.

[0071] In an optional solution of this embodiment, the limiting member 130 is a top screw.

[0072] Specifically, the limit member 130 can be a top screw for easy operation. The top screw is threadedly connected to the mounting hole 120. When fixing the self-sealing rubber core 600, the top screw is screwed in. One end of the top screw protruding from the inner wall of the seat body 100 will constrain the self-sealing rubber core 600.

[0073] See also Figure 1 , Figure 2 and Figure 4 As shown, in an optional solution of this embodiment, the driving member 200 is connected to the slip 300 through a connecting rod mechanism 500.

[0074] Specifically, the driving member 200 drives the slips 300 to move through the connecting rod mechanism 500. When the driving member 200 is working, it drives the connecting rod mechanism 500 to move, thereby driving the slips 300 to hold the pipe string tightly.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for using a multifunctional power slip, characterized in that: include: A seat body (100), a driving member (200), a slip (300) and a lifter (400); The seat body (100) is provided with a first passage for the pipe column to pass through; The slip (300) is arranged in the seat body (100), the driving member (200) is drivingly connected to the slip (300), and the slip (300) can clamp or loosen the pipe column under the drive of the driving member (200); The lifter (400) is arranged on the base (100), a second passage for a pipe column to pass through is arranged on the lifter (400), and a top plate (410) of the lifter (400) can move up and down relative to the base (100); When lowering a pipe string, the elevator (400) drives the top plate (410) to rise, and the elevator with the pipe string falls into the second channel and the first channel, and then the elevator falls on the top plate (410). At this time, the entire weight of the elevator and the pipe string falls on the top plate (410). Then, the driving member (200) pushes the slip (300) to clamp the pipe string. Before the elevator lifts the pipe string again, the slip (300) continues to hold the pipe string. Then, the top plate (410) of the elevator (400) descends, and at this time, the elevator descends a short distance. During the descent, the pipe string continues to fall a short distance under the action of gravity until the slip (300) completely holds the pipe string and the top plate (410) of the elevator (400) descends to the lowest point. A clearance space is formed between the top plate (410) and the elevator, so that the elevator can flip over to make way and withdraw, and then suspend the next pipe string.

2. The method for using the multifunctional power slips according to claim 1, characterized in that: The lifter (400) comprises an annular piston cylinder (420) and an annular piston (430); The annular piston cylinder (420) is fixedly arranged on the top of the seat body (100); The annular piston (430) is disposed in the annular piston cylinder (420), and the annular piston (430) is fixedly connected to the top plate (410).

3. The method for using the multifunctional power slips according to claim 2, characterized in that: The middle blank area of ​​the annular piston cylinder (420) forms the second channel.

4. The method for using the multifunctional power slips according to claim 1, characterized in that: The lifter (400) comprises a columnar piston (431) and a columnar piston cylinder (440) arranged on the seat body (100); The columnar piston (431) is disposed in the columnar piston cylinder (440), and the columnar piston (431) is fixedly connected to the top plate (410) via a piston rod.

5. The method for using the multifunctional power slips according to claim 4, characterized in that: An outer cover (450) is provided on the top of the columnar piston cylinder (440), and an elastic return member (460) is sleeved on the piston rod; one end of the elastic return member (460) abuts against the columnar piston (431), and the other end abuts against the outer cover (450).

6. The method for using the multifunctional power slips according to claim 4, characterized in that: The columnar piston cylinder (440) is a bidirectional piston cylinder.

7. The method for using the multifunctional power slips according to claim 4, characterized in that: There are a plurality of columnar pistons (431), and the plurality of columnar pistons (431) are evenly distributed along the circumference of the first channel.

8. The method for using the multifunctional power slips according to claim 1, characterized in that: It also includes a self-sealing rubber core (600), wherein the inner diameters of the first channel and the second channel are not less than the outer diameter of the self-sealing rubber core (600); A mounting seat (110) for mounting the self-sealing rubber core (600) is provided in the first channel.

9. The method for using the multifunctional power slips according to claim 8, characterized in that: A mounting hole (120) is provided on the side wall of the seat body (100), and the axis of the mounting hole (120) is perpendicular to the axis of the self-sealing rubber core (600); A limiting member (130) is provided in the mounting hole (120) for limiting the self-sealing rubber core (600) from being separated from the mounting seat (110).

10. The method for using the multifunctional power slips according to claim 9, characterized in that: The limiting member (130) is a top screw.

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