Tubular column clamping device

Abstract

The utility model provides a tubular column clamping device which comprises a plurality of driving lifting mechanisms evenly arranged along the periphery of a tubular column, the driving lifting mechanisms are fixedly connected with a lifting frame arranged along the periphery of the tubular column, the lifting frame is connected with a slip body through a connecting rod, and the lifting frame and the connecting rod are both located above the slip body. The connecting rod and the axis of the pipe column are obliquely arranged and form an acute angle, and a slip insert of the slip body makes contact with the outer surface of the pipe column. According to pipe columns with different diameters, the slip body can be controlled to move downwards by different distances, and different clamping forces can be provided, so that the slip can adapt to the pipe columns with different diameters, and the clamping efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of petroleum equipment technology, specifically, it relates to a tubing clamping device. Background Technology

[0002] In oilfield drilling operations, it is often necessary to clamp the tubing string to prevent it from falling. The usual method is to manually operate the slips to achieve this, which is labor-intensive, inefficient, and carries certain risks. Other solutions exist, such as pneumatic and hydraulic slips. However, these two structures have a limited range of tubing string diameters that the slips can hold, requiring frequent replacement of the slip teeth to accommodate different diameters, resulting in similarly low clamping efficiency. Utility Model Content

[0003] One objective of this invention is to provide a pipe clamping device that controls the downward movement of the clamping body by different distances according to pipes of different diameters and can provide different clamping forces, thereby adapting to pipes of different diameters and improving clamping efficiency.

[0004] According to this utility model, a pipe column clamping device is provided, comprising: a plurality of driving lifting mechanisms evenly arranged along the outer periphery of the pipe column, wherein the driving lifting mechanisms are fixedly connected to a lifting frame arranged along the outer periphery of the pipe column, the lifting frame is connected to a clamping body through a connecting rod and both the lifting frame and the connecting rod are located above the clamping body, the connecting rod is inclined to the axis of the pipe column and forms an acute angle, and the clamping teeth of the clamping body are in contact with the outer surface of the pipe column.

[0005] In a preferred embodiment, the driving lifting mechanism includes: a bidirectional motor, a gear shaft connected to the output shaft of the bidirectional motor, a lead screw meshing with the gear shaft, and a push rod driven to lift by the lead screw, wherein the push rod is fixedly connected to a lifting frame arranged along the outer periphery of the column.

[0006] In a preferred embodiment, the lead screw is disposed inside the push rod, and a plurality of balls are disposed between the inner wall of the push rod and the lead screw.

[0007] In a preferred embodiment, the tubing clamping device further includes: a slip seat disposed on the outer periphery of the tubing, the slip seat having a plurality of cavities evenly arranged along the circumference of the tubing, each cavity being provided with the bidirectional motor, gear shaft, lead screw and push rod.

[0008] In a preferred embodiment, the slip seat and the surface of the slip body on the side away from the tube column abut against each other via an inclined surface.

[0009] In a preferred embodiment, the lifting frame has a plurality of mounting holes evenly distributed along the circumference, and each push rod is fixed in the corresponding mounting hole by a locking nut.

[0010] In a preferred embodiment, each of the slips is connected with the lifting frame through two connecting rods.

[0011] In a preferred embodiment, two ends of the connecting rod are fixed with the slip and the lifting frame through a connecting rod locking ring respectively.

[0012] In a preferred embodiment, a gear wheel is arranged on the output shaft of the bidirectional motor and matches with the gear shaft.

[0013] In a preferred embodiment, the bidirectional motor is in communication connection with an electric control system.

[0014] The utility model has at least the following technical effects:

[0015] According to the utility model, a plurality of driving lifting mechanisms are evenly arranged along the outer periphery of the pipe column, and the driving lifting mechanisms are fixedly connected with the lifting frames arranged along the outer periphery of the pipe column, so that the lifting frames can be controlled to lift by the driving lifting mechanisms. In addition, the lifting frames are connected with the slips through the connecting rods, and the lifting frames and the connecting rods are located above the slips, the connecting rods are arranged obliquely to the axis of the pipe column and form an acute angle, and the slip teeth of the slips are in contact with the outer surface of the pipe column, so that the connecting rods can be driven by the lifting frames to move the slips downward and fold the slips to the center to clamp the outer surface of the pipe column. The slips can be controlled to move different distances downward and provide different clamping forces according to pipe columns with different diameters, so that the pipe columns with different diameters can be adapted, and the clamping efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure schematic view of the pipe clamping device according to one embodiment of the utility model is schematically shown;

[0017] Figure 2 The top view structure schematic view of the pipe clamping device according to one embodiment of the utility model is schematically shown.

[0018] In the present application, all the drawings are schematic drawings, which are only used for explaining the principles of the utility model and are not drawn according to the actual proportion. DETAILED DESCRIPTION

[0019] The technical solutions of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] In the description of the utility model, it is understood that the terms "outer", "inner" and the like indicate the position or location relationship based on the position or location relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model.

[0021] In the utility model, unless otherwise expressly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements or interaction relationship of two elements. For ordinary skilled persons in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.

[0022] As shown in Figure 1 and Figure 2 The pipe column clamping device 100 comprises: a plurality of driving lifting mechanisms uniformly arranged along the outer periphery of the pipe column 11, the driving lifting mechanisms are fixedly connected with the lifting frames 2 arranged along the outer periphery of the pipe column, and are used for driving the lifting frames 2 to lift. The lifting frames 2 are connected with the slips 7 through connecting rods 5, and the lifting frames 2 and the connecting rods 5 are located above the slips 7, the connecting rods 5 are arranged obliquely to the axis of the pipe column 11 and form an acute angle, and the slip teeth of the slips 7 are in contact with the outer surface of the pipe column 11.

[0023] In one or more embodiments, the driving lifting mechanism comprises: a bidirectional motor 9, a gear shaft 10 connected with the output shaft of the bidirectional motor 9, a lead screw 8 engaged with the gear shaft 10, and a push rod 3 driven to lift by the lead screw 8, the push rod 3 being fixedly connected with the lifting frames 2 arranged along the outer periphery of the pipe column 11.

[0024] When the pipe column 11 needs to be clamped, the output shaft of the bidirectional motor 9 rotates forward to drive the gear shaft 10 to rotate, and then drive the lead screw 8 to rotate, so that the push rod 3 moves downward, the push rod 3 drives the lifting frames 2 to descend, and then the slips 7 move downward and approach the pipe column 11 through the connecting rods 5, so as to clamp the outer wall of the pipe column 11 and provide the pre-tightening force of the slips 7 clamped on the pipe column 11. After the work is finished, the bidirectional motor 9 reverses, the gear shaft 10 drives the lead screw 8 to reverse, so that the push rod 3 moves upward, the push rod 3 drives the lifting frames 2 to ascend, and then the slips 7 move upward and unlock through the connecting rods 5, so as to release the clamping state.

[0025] According to the utility model, provide a plurality of drive lifting mechanisms that are evenly arranged along the outer periphery of the pipe column 11, and the drive lifting mechanisms are fixedly connected with the lifting frame 2 arranged along the outer periphery of the pipe column, so that the lifting frame 2 can be controlled to ascend and descend through the lifting mechanisms.

[0026] In one or more embodiments, the pipe clamping device 100 further comprises a slip seat 1 arranged on the outer periphery of the pipe column 11, and the slip seat 1 has a plurality of cavities evenly arranged along the circumferential direction of the pipe column 11 inside, and a bidirectional motor 9, a gear shaft 10, a lead screw 8 and a push rod 3 are arranged in each cavity.

[0027] In one or more embodiments, the surface of the slip seat 1 away from the pipe column 11 is in abutment with the inclined surface of the slip body 7, so that when the pipe column 11 has a downward movement trend, the locking force of the slip body 7 can be gradually increased.

[0028] In one or more embodiments, the lead screw 8 is arranged inside the push rod 3, and a plurality of balls are arranged between the inner wall of the push rod 3 and the lead screw 8, so as to realize the axial movement of the push rod 3 and reduce the frictional resistance.

[0029] In one or more embodiments, each slip body 7 is connected with the lifting frame 2 through two connecting rods 5.

[0030] In one or more embodiments, the lifting frame 2 is circumferentially evenly provided with a plurality of mounting holes, and each push rod 3 is fixed in the corresponding mounting hole through a locking nut.

[0031] According to the utility model, the lifting frame 2 is circumferentially evenly provided with a plurality of mounting holes, and each push rod 3 is fixed in the corresponding mounting hole through a locking nut, and through the arrangement of a plurality of push rods 3, the position of each slip 7 can be adaptively compensated and adjusted.

[0032] In one or more embodiments, the bidirectional motor 9 is in communication connection with an electric control system, and through the electric control system, the bidirectional motor 9 can be remotely controlled to rotate forward or reverse, so as to realize the clamping of the pipe column 11 or the release of the clamping, thereby ensuring the safety of the construction personnel.

[0033] In one or more embodiments, the two ends of the connecting rod 5 are fixedly connected with the slip body 7 and the lifting frame 2 through a connecting rod locking ring 6.

[0034] In one or more embodiments, the lower end of the lead screw 8 is fitted with gear teeth that cooperate with the gear shaft 10, and the output shaft of the bidirectional motor 9 is provided with gears that cooperate with the gear shaft 10.

[0035] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tubular clamping device, characterized in that, include: Multiple drive lifting mechanisms are evenly arranged along the outer periphery of the tube column. The drive lifting mechanisms are fixedly connected to the lifting frame arranged along the outer periphery of the tube column. The lifting frame is connected to the slip body through the connecting rod, and the lifting frame and the connecting rod are both located above the slip body. The connecting rod is inclined to the axis of the tube column and forms an acute angle. The slip teeth of the slip body are in contact with the outer surface of the tube column.

2. The tubing clamping device according to claim 1, characterized in that, The driving lifting mechanism includes: a bidirectional motor, a gear shaft connected to the output shaft of the bidirectional motor, a lead screw meshing with the gear shaft, and a push rod driven by the lead screw to lift. The push rod is fixedly connected to a lifting frame arranged along the outer periphery of the column.

3. The tubing clamping device according to claim 2, characterized in that, The lead screw is disposed inside the push rod, and a plurality of balls are disposed between the inner wall of the push rod and the lead screw.

4. The tubing clamping device according to claim 1, characterized in that, Also includes: The slip seat is disposed on the outer periphery of the tube column. The slip seat has multiple cavities evenly distributed along the circumference of the tube column. Each cavity is provided with the bidirectional motor, gear shaft, lead screw and push rod.

5. The tubing clamping device according to claim 4, characterized in that, The slip seat and the surface of the slip body away from the tube column are abutted by an inclined surface.

6. The tubing clamping device according to claim 2, characterized in that, The lifting frame has multiple mounting holes evenly distributed around its circumference, and each push rod is fixed in the corresponding mounting hole by a locking nut.

7. The tubing clamping device according to claim 6, characterized in that, Each of the said locking bodies is connected to the lifting frame via two said connecting rods.

8. The tubing clamping device according to claim 7, characterized in that, The two ends of the connecting rod are respectively fixed to the locking body and the lifting frame by connecting rod locking rings.

9. The tubing clamping device according to claim 1, characterized in that, The lower end of the lead screw is fitted with gear teeth that mate with the gear shaft, and the output shaft of the bidirectional motor is provided with gears that mate with the gear shaft.

10. The tubing clamping device according to claim 1, characterized in that, The bidirectional motor is communicatively connected to the electronic control system.

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