Top drive back-up wrench for drilling machine

Abstract

The utility model relates to the technical field of drilling equipment, and provides a top drive back-up wrench for a drilling machine, which comprises a mounting part used for being connected with the drilling machine. The lifting part is slidably arranged on the mounting part and is provided with a mounting cavity; one ends of the plurality of clamp bodies are arranged in the mounting cavity in a sliding manner; the clamping parts are arranged at the other ends of the pliers bodies, the clamping parts are tooth-shaped, and the clamping parts clamp a drill rod after the pliers bodies get close to one another. By means of the technical scheme, the problem that in the prior art, a back-up wrench cannot conveniently conduct fine adjustment on the height of a drill column is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a top drive back-up tong for a drilling rig. Background Art

[0002] The top drive back-up tong for drilling rigs is an important component in the top drive drilling system, and is mainly used for the make-up and break-out of drill pipes, drill collars and other drill strings during drilling operations. The top drive back-up tong uses its strong clamping force to fix the drill string, so that the top drive device can make or break the drill pipe by rotating it. In this way, the connection or disassembly of the drilling tools can be completed at any height on the drilling platform without moving the drill pipe to the rotary table position, which greatly improves the operation efficiency and flexibility.

[0003] However, the existing top drive back-up tongs are not suitable for the installation and disassembly of large-diameter drill strings when fixing the drill string. Secondly, the back-up tongs cannot be raised or lowered during the installation and disassembly process, which makes it inconvenient to fine-tune the height of the drill string. It is not convenient to adjust to a suitable height during actual use, and the operation is very cumbersome. Therefore, it is necessary to improve the existing back-up tongs to solve the above problems. Utility Model Content

[0004] The utility model provides a top drive back-up tong for a drilling rig, which solves the problem that the back-up tong in the related art is inconvenient for fine-tuning the height of a drill string.

[0005] The technical solution of the utility model is as follows:

[0006] Top drive back-up tongs for drilling rigs, including

[0007] A mounting portion, the mounting portion being used to connect to a drilling rig;

[0008] A lifting part, the lifting part is slidably arranged on the mounting part, and the lifting part has a mounting cavity;

[0009] A pliers body, the pliers body having a plurality of pliers bodies, one end of the plurality of pliers bodies being slidably disposed in the mounting cavity;

[0010] The clamping part is arranged at the other end of the clamp body, and the clamping part is tooth-shaped. When a plurality of the clamp bodies are close to each other, the clamping part clamps the drill rod.

[0011] Optionally, one end of the clamp body located in the installation cavity has a guiding slope, and further includes

[0012] A top block, wherein the top block is slidably disposed in the mounting cavity, and one end of the top block abuts against the guide inclined surface;

[0013] A first elastic member, two ends of which are arranged on the inner wall of the mounting cavity and the pliers body, and the first elastic member is used to provide a force for the plurality of pliers bodies to move away from each other.

[0014] Optionally, the top block divides the installation cavity into a first oil cavity and a second oil cavity, and hydraulic oil is introduced into the first oil cavity or the second oil cavity to push the top block to slide.

[0015] Optionally, also include

[0016] The guide block has a conical inner wall, is arranged on the caliper body, and an end of the guide block with a small inner diameter is close to the caliper body.

[0017] Optionally, the lifting part includes

[0018] A first sliding part, one end of which is lifted and lowered on the mounting part;

[0019] A second sliding part, one end of which is lifted and lowered on the mounting part, the other end of which is disposed on the other end of the first sliding part, and both the first sliding part and the second sliding part have the mounting cavity.

[0020] Optionally, also include

[0021] A first telescopic member, wherein the first telescopic member is disposed in the mounting cavity, and the first telescopic extending end is connected to the pliers body.

[0022] Optionally, the clamping portion has a raised portion and a recessed portion, and the raised portion and the recessed portion are sequentially connected end to end to form a tooth shape.

[0023] Optionally, also include

[0024] A second telescopic member, wherein the second telescopic member is disposed in the mounting portion, and the second telescopic member is used for driving the lifting portion to move up and down.

[0025] The working principle and beneficial effects of the utility model are:

[0026] In the utility model, the lifting and lowering of the back-up tong is realized by the second telescopic member, thereby controlling the height of the clamped drill string, and the control is convenient and reliable; Figure 1 As shown in , the back-up tongs can also be set as large-caliber tongs, which can be better adapted to work on drill strings of various calibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0028] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0029] Figure 2This is a structural cross-sectional view of the first embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the second embodiment of the utility model;

[0031] Figure 4 This is a structural sectional view of the second embodiment of the utility model.

[0032] In the figure: 1, mounting part, 2, lifting part, 3, mounting cavity, 4, clamp body, 401, clamping part, 402, guide slope, 5, top block, 6, first elastic member, 7, first oil chamber, 8, second oil chamber, 9, guide block, 201, first sliding part, 202, second sliding part, 10, first telescopic member, 4011, protrusion, 4012, recess, 11, second telescopic member. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0034] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0035] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] Embodiment 1

[0038] Reference Figure 1~Figure 2, which is the first embodiment of the utility model, proposes a top drive back tong for a drilling rig, including a mounting portion 1, the mounting portion 1 is used to connect with the drilling rig; a lifting portion 2 is slidably arranged on the mounting portion 1, and the lifting portion 2 has a mounting cavity 3; there are multiple tongs 4, one end of which is slidably arranged in the mounting cavity 3; a clamping portion 401 is arranged at the other end of the tongs 4, and the clamping portion 401 is tooth-shaped, and the clamping portion 401 clamps the drill rod after the multiple tongs 4 are close to each other. One end of the tongs 4 located in the mounting cavity 3 has a guide slope 402, and also includes a top block 5, which is slidably arranged in the mounting cavity 3, and one end of the top block 5 abuts against the guide slope 402; the two ends of the first elastic member 6 are arranged on the inner wall of the mounting cavity 3 and the tongs 4, and the first elastic member 6 is used to provide a force for the multiple tongs 4 to move away from each other. The top block 5 divides the mounting cavity 3 into a first oil cavity 7 and a second oil cavity 8, and the hydraulic oil is introduced into the first oil cavity 7 or the second oil cavity 8 to push the top block 5 to slide. The inner wall of the guide block 9 is conical, and the guide block 9 is arranged on the pliers body 4, and the end of the guide block 9 with a small inner diameter is close to the pliers body 4. A second telescopic member 11 is also included, and the second telescopic member 11 is arranged in the mounting part 1, and the second telescopic member 11 is used to drive the lifting part 2 to rise and fall.

[0039] In this embodiment, the mounting part 1 is used as the basic component of the back-up clamp, and is tightly connected to the drilling rig by bolts or welding to ensure the stability of the entire device. The lifting part 2 can slide on the mounting part 1, and the clamp body 4 is slidably arranged in the mounting cavity 3. The lifting and lowering of the lifting part 2 enables the clamp body 4 to maintain good alignment and clamping capabilities when working at different heights. A clamping part 401 is configured at one end where the multiple clamp bodies 4 are close to each other. The clamping part 401 is specifically tooth-shaped. After the multiple clamp bodies 4 are close to each other, the clamping part 401 ensures a tight engagement with the drill rod. The other end of the clamp body 4 is provided with a guide slope 402. After the top block 5 slides, it contacts the guide slope 402 to push the sliding of the clamp body 4, so that the clamping part 401 can clamp the drill rod. When the drill rod does not need to be clamped, the top block 5 is reset, and the clamp body 4 is reset under the action of the first elastic member 6. The distance between the multiple clamp bodies 4 is adjusted by the cooperation between the first elastic member 6 and the top block 5.

[0040] By injecting hydraulic oil into the first oil chamber 7 or the second oil chamber 8, the top block 5 can be pushed to slide along the installation chamber 3, thereby achieving precise control of the spacing between the pliers 4 and adjusting the clamping force of the drill rod. The inner wall of the guide block 9 is conical in design, with the end with a smaller inner diameter facing the pliers 4, ensuring that the drill rod can smoothly enter between the multiple clamping parts 401, thereby improving the stability of the connection. The lifting part 2 is lifted and lowered by the second telescopic member 11, and the height of the lifting part 2 is controlled, which is convenient and reliable. In addition, Figure 1 As shown in , the back-up tongs can also be configured as large-caliber tong bodies 4, which can be better adapted to work on drill strings of various calibers.

[0041] Embodiment 2

[0042] Reference Figure 3~Figure 4 , which is the second embodiment of the utility model, proposes a top drive back tong for a drilling rig, comprising a mounting portion 1, the mounting portion 1 is used to connect to the drilling rig; a lifting portion 2 is slidably arranged on the mounting portion 1, and the lifting portion 2 has a mounting cavity 3; there are multiple tongs 4, and one end of the multiple tongs 4 is slidably arranged in the mounting cavity 3; a clamping portion 401 is arranged at the other end of the tongs 4, and the clamping portion 401 is tooth-shaped, and the clamping portion 401 clamps the drill rod after the multiple tongs 4 are close to each other. The lifting portion 2 includes a first sliding portion 201, one end of the first sliding portion 201 is lifted and arranged on the mounting portion 1; one end of the second sliding portion 202 is lifted and arranged on the mounting portion 1, and the other end of the second sliding portion 202 is arranged at the other end of the first sliding portion 201, and the first sliding portion 201 and the second sliding portion 202 both have a mounting cavity 3. It also includes a first telescopic member 10, the first telescopic member 10 is arranged in the mounting cavity 3, and the first telescopic protruding end is connected to the tongs 4. The clamping part 401 has a protrusion 4011 and a recess 4012, which are connected end to end to form a tooth shape. The second telescopic member 11 is arranged in the mounting part 1 and is used to drive the lifting part 2 to move up and down.

[0043] In this embodiment, the mounting part 1 is used as the basic component of the back-up clamp, and is tightly connected to the drilling rig by bolts or welding to ensure the stability of the entire device. The lifting part 2 can slide on the mounting part 1, and the clamp body 4 is slidably arranged in the mounting cavity 3. The lifting of the lifting part 2 enables the clamp body 4 to maintain good alignment and clamping capabilities when operating at different heights. A clamping part 401 is configured at one end where the multiple clamp bodies 4 are close to each other. The clamping part 401 is specifically tooth-shaped. After the multiple clamp bodies 4 are close to each other, the clamping part 401 ensures a tight engagement with the drill rod. The lifting part 2 is a split structure composed of a first sliding part 201 and a second sliding part 202, and its mounting cavity 3 is an exposed groove-type structure, which is convenient for the installation of the clamp body 4. The extension and retraction of the first telescopic member 10 can drive the sliding of the clamp body 4, so that the multiple clamping parts 401 are close to each other and clamp the drill rod. The tooth shape of the clamping part 401 is composed of a protrusion 4011 and a recessed part 4012, which increases the friction between the drill rod and the drill rod while reducing the damage to the drill rod caused by the sharp structure, thereby increasing the service life of the drill rod. The lifting and lowering of the lifting part 2 is realized by the second telescopic member 11. The first telescopic member 10 and the second telescopic member 11 can be specifically a hydraulic cylinder, which is easy to control and has better reliability.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A top drive back-up tong for a drilling rig, characterized in that: include A mounting portion (1), the mounting portion (1) being used to be connected to a drilling rig; A lifting portion (2), the lifting portion (2) being slidably arranged on the mounting portion (1), the lifting portion (2) having a mounting cavity (3); A pliers body (4), the pliers body (4) comprising a plurality of pliers bodies (4), one end of the plurality of pliers bodies (4) being slidably disposed in the mounting cavity (3); A clamping portion (401) is arranged at the other end of the clamp body (4), the clamping portion (401) is tooth-shaped, and when a plurality of the clamp bodies (4) are brought close to each other, the clamping portion (401) clamps the drill rod.

2. The top drive back-up tong for drilling rig according to claim 1, characterized in that: One end of the clamp body (4) located in the installation cavity (3) has a guiding inclined surface (402), and further includes A top block (5), the top block (5) being slidably disposed in the mounting cavity (3), one end of the top block (5) being in contact with the guide inclined surface (402); A first elastic member (6), wherein two ends of the first elastic member (6) are arranged on the inner wall of the mounting cavity (3) and the pliers body (4), and the first elastic member (6) is used to provide a force for moving the plurality of pliers bodies (4) away from each other.

3. The top drive back-up tong for drilling rig according to claim 2, characterized in that: The top block (5) divides the installation cavity (3) into a first oil cavity (7) and a second oil cavity (8), and hydraulic oil is introduced into the first oil cavity (7) or the second oil cavity (8) to push the top block (5) to slide.

4. The top drive back-up tong for drilling rig according to claim 3, characterized in that: Also includes A guide block (9), the inner wall of the guide block (9) being conical, the guide block (9) being arranged on the pliers body (4), and the end of the guide block (9) having a smaller inner diameter being close to the pliers body (4).

5. The top drive back-up tong for drilling rig according to claim 1, characterized in that: The lifting part (2) comprises A first sliding portion (201), one end of the first sliding portion (201) being arranged on the mounting portion (1) in a lifting manner; A second sliding part (202), one end of the second sliding part (202) being arranged on the mounting part (1) in a lifting manner, the other end of the second sliding part (202) being arranged on the other end of the first sliding part (201), and the first sliding part (201) and the second sliding part (202) both having the mounting cavity (3).

6. The top drive back-up tong for drilling rig according to claim 5, characterized in that: Also includes A first telescopic member (10), wherein the first telescopic member (10) is arranged in the installation cavity (3), and the first telescopic extending end is connected to the pliers body (4).

7. The top drive back-up tong for drilling rig according to claim 6, characterized in that: The clamping portion (401) comprises a raised portion (4011) and a recessed portion (4012), wherein the raised portion (4011) and the recessed portion (4012) are sequentially connected end to end to form a tooth shape.

8. The top drive back-up tong for drilling rig according to claim 4 or 7, characterized in that: Also includes A second telescopic member (11), wherein the second telescopic member (11) is arranged in the mounting portion (1), and the second telescopic member (11) is used to drive the lifting portion (2) to move up and down.

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