Centering device for well mouth of workover rig

Abstract

The utility model discloses a centering device for a well mouth of a workover rig, which relates to the technical field of auxiliary equipment of the workover rig and comprises supports, two cross beams symmetrically fixed between the two supports, a rectangular cylinder movably mounted between the two cross beams, a rotary support component mounted on the rectangular cylinder, and a centering auxiliary component mounted on the rotary support component. The centering auxiliary assembly comprises a first half-cone cylinder and a second half-cone cylinder, the outer wall of the first half-cone cylinder is connected with a first hydraulic push rod through a steering corner piece, the rotary supporting assembly comprises an L-shaped supporting plate fixed to one side of the top end of the rectangular cylinder, and one end of the horizontal section of the L-shaped supporting plate is rotationally connected with a rectangular frame through a steering corner piece. According to the utility model, the support, the cross beam, the rectangular cylinder, the rotary supporting assembly and the centering auxiliary assembly are matched for use, so that a pipe column is stably supported and aligned with a wellhead, the operation is convenient and fast, the danger of manual pipe supporting work is reduced, the labor intensity of operators is reduced, and the manpower waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of workover machine auxiliary equipment, in particular to a centering device for a wellhead of a workover machine. Background Art

[0002] During the pipe lowering operation of overhaul drilling on the market, it is difficult to complete the docking of the pipe string with the next stage pipe string during the descending process. Usually, the pipe string needs to be manually pushed and supported for docking, which results in one or two people needing to be placed on the operating platform for operation, resulting in high labor costs. At the same time, during the centering process, there are certain safety risks for the operators. Therefore, a centering device for the wellhead of a workover rig is provided. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a centering device for the wellhead of a well repair rig, which can stably support the pipe column and align it with the wellhead through the coordinated use of the support, crossbeam, rectangular cylinder, rotating support assembly and centering auxiliary assembly, which is convenient and quick, reduces the danger of manual pipe supporting work, reduces the labor intensity of operators, reduces manpower waste, overcomes the deficiencies in the prior art, and effectively solves the problem that the existing drilling pipe column docking requires one or two people to operate, which has high labor costs. At the same time, during the centering process, the operator also faces certain safety risks.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A centering device for a wellhead of a workover machine comprises a support, two crossbeams are symmetrically fixed between two of the supports, a rectangular cylinder is movably installed between the two crossbeams, a rotating support assembly is installed on the rectangular cylinder, and a centering auxiliary assembly is installed on the rotating support assembly;

[0006] The centering auxiliary assembly comprises a first semi-conical cylinder and a second semi-conical cylinder, wherein the outer wall of the first semi-conical cylinder is connected to a first hydraulic push rod via a steering angle piece.

[0007] Through the above scheme, through the coordinated use of the support, beam, rectangular tube, rotating support assembly and centering auxiliary assembly, the pipe column can be stably supported and aligned with the wellhead, which is convenient and quick, reduces the danger of manual pipe supporting work, reduces the labor intensity of operators, and reduces manpower waste.

[0008] Preferably, the rotating support assembly includes an L-shaped support plate fixed on one side of the top end of the rectangular cylinder, one end of the horizontal section of the L-shaped support plate is rotatably connected to a rectangular frame through a steering angle piece, a second hydraulic push rod is installed on the other side of the top end of the rectangular cylinder through a steering angle piece, a support rod is installed on one side of the lower end surface of the rectangular frame, and one end of the second hydraulic push rod is connected to the bottom end of the support rod through a steering angle piece.

[0009] Preferably, a fixed block is installed on one side of the upper end surface of the rectangular frame above the second hydraulic push rod, one end of the first hydraulic push rod is fixedly connected to one side of the fixed block, and the second semi-cone is fixed to the other side of the upper end surface of the rectangular frame through a steering angle piece.

[0010] Preferably, the first semi-cone cylinder and the second semi-cone cylinder have the same size.

[0011] Preferably, the outer walls on two opposite sides of the rectangular tube are provided with sliding grooves, and the two cross beams are respectively slidably engaged with the two sliding grooves.

[0012] Preferably, an adjusting bolt is threaded on the top of one of the supports, and one end of the adjusting bolt is rotatably connected to one side of the rectangular tube via a bearing.

[0013] The beneficial effects of the utility model are:

[0014] 1. Place the tubing of the workover rig between the first half cone and the second half cone. According to the inclination of the tubing, the second hydraulic push rod is used to drive the rectangular frame to rotate to adjust the angle of the rectangular frame so that the plane where the rectangular frame is located is perpendicular to the tubing. The first hydraulic push rod is used to push the first half cone toward the second half cone so that the first half cone and the second half cone are combined into a complete cone and the tubing is covered to support the tubing and ensure the stability of the tubing when it is lowered.

[0015] 2. By turning the adjusting bolts to drive the rectangular tube to move, the pipe string is driven to move. The position of the pipe string is adjusted and aligned with the wellhead, and the pipe can be lowered stably. This is convenient and quick, and reduces the danger of manual pipe support.

[0016] The work of manually pushing the pipe column for docking is completed by mechanically dropping the pipe column, which reduces the waste of manpower, is convenient for installation, reduces the labor intensity of operators, and reduces the risk of workers' work

[0017] In summary, through the coordinated use of the support, beam, rectangular tube, rotating support assembly and centering auxiliary assembly, the pipe string can be stably supported and aligned with the wellhead, which is convenient and quick, reduces the danger of manual pipe supporting work, reduces the labor intensity of operators, and reduces manpower waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic diagram of a three-dimensional structure of a centering device for a wellhead of a workover rig from a first viewing angle.

[0019] Figure 2 This is a schematic diagram of the stereoscopic structure from a second viewing angle of a centering device for a wellhead of a well repair rig proposed by the utility model.

[0020] Figure 3 The utility model is a schematic structural diagram of a rectangular tube of a centering device for a wellhead of a workover rig.

[0021] In the figure: 1. support; 2. rectangular cylinder; 3. fixed block; 4. first hydraulic push rod; 5. first semi-conical cylinder; 6. second semi-conical cylinder; 7. rectangular frame; 8. L-shaped support plate; 9. crossbeam; 10. adjusting bolt; 11. second hydraulic push rod; 12. support rod; 13. steering angle piece; 14. slide groove. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Example 1, reference Figure 1-3 A centering device for a wellhead of a workover rig comprises a support 1, two cross beams 9 are symmetrically fixed between the two supports 1, a rectangular cylinder 2 is movably installed between the two cross beams 9, a rotating support assembly is installed on the rectangular cylinder 2, a centering auxiliary assembly is installed on the rotating support assembly, the centering auxiliary assembly comprises a first semi-conical cylinder 5 and a second semi-conical cylinder 6, and the outer wall of the first semi-conical cylinder 5 is connected to a first hydraulic push rod 4 through a steering angle piece 13;

[0024] The rotating support assembly includes an L-shaped support plate 8 fixed to one side of the top end of the rectangular tube 2, one end of the horizontal section of the L-shaped support plate 8 is rotatably connected to the rectangular frame 7 through a steering angle piece, a second hydraulic push rod 11 is installed on the other side of the top end of the rectangular tube 2 through a steering angle piece 13, a support rod 12 is installed on one side of the lower end surface of the rectangular frame 7, one end of the second hydraulic push rod 11 is connected to the bottom end of the support rod 12 through the steering angle piece 13, and the rectangular frame 7 can be driven to rotate by the extension and contraction of the second hydraulic push rod 11 to adjust the angle of the rectangular frame 7;

[0025] A fixing block 3 is installed on one side of the upper end surface of the rectangular frame 7, located above the second hydraulic push rod 11. One end of the first hydraulic push rod 4 is fixedly connected to one side of the fixing block 3. The second semi-cone cylinder 6 is fixed to the other side of the upper end surface of the rectangular frame 7 through a steering angle piece 13. The first semi-cone cylinder 5 and the second semi-cone cylinder 6 have the same size.

[0026] The pipe string of the workover rig is placed between the first half cone 5 and the second half cone 6, and the first hydraulic push rod 4 is used to push the first half cone 5 toward the second half cone 6, so that the first half cone 5 and the second half cone 6 are combined into a complete cone, and the pipe string is sleeved to support the pipe string;

[0027] The outer walls of the two opposite sides of the rectangular tube 2 are provided with slide grooves 14, and the two cross beams 9 are respectively slidably engaged with the two slide grooves 14. An adjusting bolt 10 is screwed on the top of one of the supports 1, and one end of the adjusting bolt 10 is rotatably connected to one side of the rectangular tube 2 through a bearing.

[0028] By rotating the adjusting bolt 10 to drive the rectangular tube 2 to move, thereby driving the pipe string to move, the position of the pipe string can be adjusted and aligned with the wellhead.

[0029] Working principle: the pipe string of the well repair machine is placed between the first semi-conical cylinder 5 and the second semi-conical cylinder 6. According to the inclination degree of the pipe string, the second hydraulic push rod 11 is used to drive the rectangular frame 7 to rotate to adjust the angle of the rectangular frame 7, so that the plane where the rectangular frame 7 is located is perpendicular to the pipe string. The first hydraulic push rod 4 is used to push the first semi-conical cylinder 5 to move toward the second semi-conical cylinder 6, so that the first semi-conical cylinder 5 and the second semi-conical cylinder 6 are combined into a complete cone, and the pipe string is covered to support the pipe string, thereby ensuring the stability of the pipe string when lowering the pipe. The rectangular cylinder 2 is driven to move by rotating the adjusting bolt 10, thereby driving the pipe string to move. The position of the pipe string is adjusted and aligned with the wellhead, and stable pipe lowering can be carried out. It is convenient and quick, and reduces the danger of manual pipe supporting work.

[0030] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A centering device for a wellhead of a workover rig, comprising a support (1), characterized in that: Two crossbeams (9) are symmetrically fixed between the two supports (1), a rectangular cylinder (2) is movably installed between the two crossbeams (9), a rotating support assembly is installed on the rectangular cylinder (2), and a centering auxiliary assembly is installed on the rotating support assembly; The centering auxiliary component comprises a first semi-conical cylinder (5) and a second semi-conical cylinder (6), wherein the outer wall of the first semi-conical cylinder (5) is connected to a first hydraulic push rod (4) via a steering angle piece (13).

2. A centering device for a wellhead of a workover rig according to claim 1, characterized in that: The rotary support assembly comprises an L-shaped support plate (8) fixed to one side of the top end of the rectangular cylinder (2); one end of the horizontal section of the L-shaped support plate (8) is rotatably connected to a rectangular frame (7) via a steering angle piece (13); a second hydraulic push rod (11) is installed on the other side of the top end of the rectangular cylinder (2) via the steering angle piece (13); a support rod (12) is installed on one side of the lower end surface of the rectangular frame (7); one end of the second hydraulic push rod (11) is connected to the bottom end of the support rod (12) via the steering angle piece (13).

3. A centering device for a wellhead of a workover rig according to claim 2, characterized in that: A fixed block (3) is installed on one side of the upper end surface of the rectangular frame (7) above the second hydraulic push rod (11); one end of the first hydraulic push rod (4) is fixedly connected to one side of the fixed block (3); and the second semi-conical cylinder (6) is fixed to the other side of the upper end surface of the rectangular frame (7) via a steering angle piece (13).

4. The centering device for a wellhead of a workover rig according to claim 1, characterized in that: The first semi-cone cylinder (5) and the second semi-cone cylinder (6) have the same size.

5. A centering device for a wellhead of a workover rig according to claim 4, characterized in that: The outer walls of the rectangular tube (2) on both opposite sides are provided with sliding grooves (14), and the two cross beams (9) are respectively slidably engaged with the two sliding grooves (14).

6. A centering device for a wellhead of a workover rig according to claim 5, characterized in that: An adjusting bolt (10) is screwed onto the top of one of the supports (1), and one end of the adjusting bolt (10) is rotatably connected to one side of the rectangular tube (2) via a bearing.

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