Efficient tong tooth replacing device for drill rod power tongs

Abstract

The utility model relates to the technical field of jaw plates of petroleum drill rod power tongs, in particular to an efficient tong tooth replacing device for drill rod power tongs, which comprises a jaw plate, a dovetail groove communicated with an arc-shaped surface on the front side of the jaw plate is arranged at the top of the jaw plate, and a long block with tong teeth on one side is slidably connected to the inner side of the dovetail groove. A containing opening communicating with the dovetail groove is formed in the top of the jaw plate, and a penetrating hole is formed in the side face, away from the dovetail groove, of the containing opening. According to the utility model, through the design of the guide rod and the convex block driven by the spring, the convex block moves to the upper part of the long block with the clamp teeth on one side when the operation is not carried out, so that the long block with the clamp teeth on one side is limited to move upwards, and the long block with the clamp teeth on one side can be quickly taken out by only manually operating the handle in the disassembly process; and meanwhile, the mode is also convenient for mounting the long block with the tong teeth on one surface after replacement, so that the maintenance cost is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of the jaw plate of a power tong for oil drill pipes, in particular to a device for efficiently replacing the jaw teeth of a drill pipe power tong. Background Art

[0002] With the continuous increase of the drilling depth, the frequency of tripping in and out at the drilling site is higher. When using a hydraulic pneumatic tong to make and break joints, the jaw plate and the jaw teeth are fixed by bolts. During frequent make and break operations in dynamic work, the bolts come loose due to back-off. If inspections are not timely, the bolts collide and rub against the drill pipe coupling, resulting in damaged threads, deformed make and break areas, and the inability to replace them in time, causing downhole complications, high failure rates, low work efficiency, and great safety risks.

[0003] The existing connection structure between the jaw plate and the jaw teeth is inconvenient for disassembling and assembling the jaw teeth. In order to improve the replacement efficiency of the jaw teeth and reduce the working intensity of the staff, the utility model provides a device for efficiently replacing the jaw teeth of a drill pipe power tong. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and a device for efficiently replacing the jaw teeth of a drill pipe power tong is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: A device for efficiently replacing the jaw teeth of a drill pipe power tong, including a jaw plate. The front side of the jaw plate has an arc surface, and the rear side of the jaw plate is fixedly installed with a jaw plate frame of a hydraulic pneumatic tong. A dovetail groove communicating with the arc surface on the front side of the jaw plate is opened at the top of the jaw plate. A long block with jaw teeth on one surface is slidably connected inside the dovetail groove. A receiving opening communicating with the dovetail groove is opened at the top of the jaw plate. A through hole is opened on one side surface of the receiving opening away from the dovetail groove. A guide rod is arranged inside the through hole. One end of the guide rod and inside the receiving opening is fixedly connected with a convex block. A spring is sleeved outside the guide rod between the convex block and the inner wall of the receiving opening. The end of the guide rod away from the convex block is fixedly connected with a handle.

[0006] As a further description of the above technical scheme:

[0007] A middle hole is opened at the top of the jaw plate. The middle hole communicates with the through hole. A sliding hole is opened on the side surface of the guide rod along the axial direction of the guide rod. A limiting nail is fixedly connected to the inner bottom of the middle hole and inside the sliding hole.

[0008] As a further description of the above technical scheme:

[0009] A connection opening is opened at the rear side of the jaw plate. Ear plates are formed above and below the connection opening on the rear side of the jaw plate, and ear holes are provided on the ear plates;

[0010] It further includes: a main pin shaft, and the main pin shaft is located in the ear holes of two ear plates.

[0011] As a further description of the above technical solution:

[0012] The top of the jaw plate is rotatably connected with a first guide block and a second guide block. A guiding opening is formed between the first guide block and the second guide block. The guiding opening is a tapered shape that is larger at the top and smaller at the bottom, and the guiding opening is coaxial with the ear hole on the ear plate. A tapered head section is fixedly connected to the top of the main pin shaft and located inside the guiding opening.

[0013] As a further description of the above technical solution:

[0014] Transverse holes are formed on the sides of the first guide block and the second guide block;

[0015] It further includes: a single-head pin. One end of the single-head pin passes through the transverse hole and the jack formed on the side of the tapered head section, and a screw is fixedly installed at the end of the single-head pin.

[0016] As a further description of the above technical solution:

[0017] There are two long blocks with jaw teeth on one side.

[0018] The utility model has the following beneficial effects:

[0019] 1. Compared with the prior art, for this efficient jaw replacement device of a drill pipe power tong, by designing a guide rod and a convex block driven by a spring, when not in operation, the convex block moves above the long block with jaw teeth on one side, thereby restricting the upward movement of the long block with jaw teeth on one side, completing the installation of the long block with jaw teeth on one side. When disassembling, only need to manually operate the handle to drive the guide rod and the convex block to move against the elastic force of the spring, and the long block with jaw teeth on one side can be quickly taken out. At the same time, this method is also convenient for installing and replacing the long block with jaw teeth on one side after installation, so as to be able to replace the long block with jaw teeth on one side efficiently and quickly, reducing the working intensity of the staff.

[0020] 2. Compared with the prior art, for this efficient jaw replacement device of a drill pipe power tong, by designing a first guide block and a second guide structure, the formed guiding opening can accommodate the tapered head section of the main pin shaft, and at the same time, the guiding opening can facilitate the downward insertion of the main pin shaft into the ear hole on the ear plate, so as to be convenient for quick installation and use. Description of the Drawings

[0021] Figure 1 is a three-dimensional view of an efficient jaw replacement device of a drill pipe power tong proposed by the utility model;

[0022] Figure 2 is Figure 1 the partial enlarged view at A in

[0023] Figure 3 The front view of an efficient jaw replacement device for a drill pipe power tong proposed by the present utility model;

[0024] Figure 4 The side view of an efficient jaw replacement device for a drill pipe power tong proposed by the present utility model;

[0025] Figure 5 The top view of an efficient jaw replacement device for a drill pipe power tong proposed by the present utility model;

[0026] Figure 6 The exploded view of an efficient jaw replacement device for a drill pipe power tong proposed by the present utility model.

[0027] Legend:

[0028] 1. Jaw plate; 2. Connection port; 3. First guide block; 4. Second guide block; 5. Guide port; 6. Transverse hole; 7. Main pin shaft; 8. Tapered head section; 9. Insertion hole; 10. Single-head pin; 11. Screw; 12. Long block with jaws on one side; 13. Accommodating port; 14. Intermediate hole; 15. Perforation; 16. Slide hole; 17. Limit pin; 18. Handle; 19. Spring; 20. Protrusion; 21. Guide rod. Specific implementation mode

[0029] Referring to Figures 1-6 , an efficient jaw replacement device for a drill pipe power tong provided by the present utility model: includes a jaw plate 1, the front side of the jaw plate 1 has an arc surface corresponding to the arc side surface of the drill pipe, the rear side of the jaw plate 1 is fixedly installed with the jaw plate frame of the hydraulic and pneumatic tong, the jaw plate 1 is driven by the hydraulic and pneumatic tong to work, a dovetail groove communicating with the front arc surface of the jaw plate 1 is opened at the top of the jaw plate 1, the bottom end of the dovetail groove is not through, a long block 12 with jaws on one side is slidably connected inside the dovetail groove, an accommodating port 13 communicating with the dovetail groove is opened at the top of the jaw plate 1, the accommodating port 13 is used for temporarily accommodating the protrusion 20, a perforation 15 is opened on the side surface of the accommodating port 13 away from the dovetail groove, a guide rod 21 is arranged inside the perforation 15, one end of the guide rod 21 and located inside the accommodating port 13 is fixedly connected with the protrusion 20, a spring 19 is sleeved outside the guide rod 21 and between the protrusion 20 and the inner wall of the accommodating port 13, and the end of the guide rod 21 away from the protrusion 20 is fixedly connected with a handle 18.

[0030] Under the action of the spring 19, the bump 20 is pushed into the dovetail groove, so as to limit the upward sliding of the long block 12 with clamping teeth on one side, realizing the quick installation of the long block 12 with clamping teeth on one side; when disassembling, the user operates the handle 18 to pull the guide rod 21 and the bump 20, and the bump 20 presses the spring 19, so as to pull the bump 20 into the accommodation port 13. At this time, the long block 12 with clamping teeth on one side can slide upward and be taken out. After replacing with a new long block 12 with clamping teeth on one side, the handle 18 is released, and under the action of the spring 19, the bump 20 automatically returns to its position, automatically completing the fixation of the long block 12 with clamping teeth on one side.

[0031] In one embodiment, a middle hole 14 is opened at the top of the jaw plate 1, the middle hole 14 is communicated with the through hole 15, a sliding hole 16 is opened on the side surface of the guide rod 21 along the axial direction of the guide rod 21, and a limiting nail 17 is fixedly connected to the inner bottom of the middle hole 14 and inside the sliding hole 16.

[0032] When the guide rod 21 moves axially, the limiting nail 17 slides relatively inside the sliding hole 16. When the two ends of the sliding hole 16 contact the limiting nail 17, the continued sliding of the guide rod 21 will be restricted. The design of this structure enables the guide rod 21 to slide between a set distance.

[0033] In one embodiment, a connection port 2 is opened at the rear side of the jaw plate 1, and ear plates are formed on the rear side of the jaw plate 1 above and below the connection port 2, and ear holes are provided on the ear plates.

[0034] It further includes: a main pin shaft 7, the main pin shaft 7 is located in the ear holes of the two ear plates, and mounting holes are also opened at corresponding positions on the jaw plate frame of the hydraulic pneumatic tong. The main pin shaft 7 passes through the mounting holes to achieve quick installation.

[0035] In one embodiment, a first guide block 3 and a second guide block 4 are rotatably connected to the top of the jaw plate 1. A guiding port 5 is formed between the first guide block 3 and the second guide block 4. The guiding port 5 is a tapered shape with a larger upper part and a smaller lower part, and the guiding port 5 is coaxial with the ear hole on the ear plate. A tapered head section 8 is fixedly connected to the top of the main pin shaft 7 and inside the guiding port 5.

[0036] By designing the first guide block 3 and the second guide structure 4, the formed guiding port 5 can accommodate the tapered head section 8 of the main pin shaft, and at the same time, the guiding port can facilitate the downward insertion of the main pin shaft into the ear hole on the ear plate for convenient quick installation and use.

[0037] In one embodiment, transverse holes 6 are opened on the side surfaces of the first guide block 3 and the second guide block 4. It further includes: a single-head pin 10, one end of the single-head pin 10 passes through the transverse hole 6 and the jack 9 opened on the side surface of the tapered head section 8, and a screw 11 is fixedly installed at the end of the single-head pin 10.

[0038] After the single-headed pin 10 and the screw 11 are installed, the separation movement of the first guide block 3 and the second guide block 4 can be restricted, and the structure is in a stable state.

[0039] In one embodiment, two long blocks 12 with clamping teeth on one side are provided, so that the jaw plate 1 has a good use effect.

[0040] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for efficiently replacing jaws of a drill pipe power tong, comprising a jaw plate (1), wherein the front side of the jaw plate (1) has an arc-shaped surface, and the rear side of the jaw plate (1) is fixedly mounted to a jaw plate frame of a hydraulic and pneumatic tong, characterized in that: The top of the jaw plate (1) is provided with a dovetail groove connected to the front curved surface of the jaw plate (1), and a long block (12) with jaw teeth on one side is slidably connected to the inner side of the dovetail groove. The top of the jaw plate (1) is provided with a receiving opening (13) connected to the dovetail groove, and a through hole (15) is provided on a side of the receiving opening (13) away from the dovetail groove. A guide rod (21) is arranged inside the through hole (15), and a protrusion (20) is fixedly connected to one end of the guide rod (21) and located inside the receiving opening (13). A spring (19) is sleeved on the outer side of the guide rod (21) and located between the protrusion (20) and the inner wall of the receiving opening (13), and a handle (18) is fixedly connected to one end of the guide rod (21) away from the protrusion (20).

2. The device for efficiently replacing jaws of a drill pipe power tong according to claim 1, characterized in that: A middle hole (14) is provided on the top of the jaw plate (1), the middle hole (14) being in communication with the through hole (15), a sliding hole (16) is provided on the side of the guide rod (21) and along the axial direction of the guide rod (21), and a limiting pin (17) is fixedly connected to the inner bottom of the middle hole (14) and located inside the sliding hole (16).

3. The device for efficiently replacing jaws of a drill pipe power tong according to claim 1, characterized in that: A connection port (2) is provided on the rear side of the jaw plate (1), and ear plates are formed on the rear side of the jaw plate (1) and above and below the connection port (2), and the ear plates have ear holes; It also comprises a main pin shaft (7), wherein the main pin shaft (7) is located in the ear holes of the two ear plates.

4. The device for efficiently replacing jaws of a drill pipe power tong according to claim 3, characterized in that: The top of the jaw plate (1) is rotatably connected to a first guide block (3) and a second guide block (4); a guide opening (5) is formed between the first guide block (3) and the second guide block (4); the guide opening (5) is in a conical shape with a larger upper portion and a smaller lower portion, and the guide opening (5) is coaxial with the ear hole on the ear plate; a cone head section (8) is fixedly connected to the top of the kingpin shaft (7) and located on the inner side of the guide opening (5).

5. The device for efficiently replacing jaws of a drill pipe power tong according to claim 4, characterized in that: The side surfaces of the first guide block (3) and the second guide block (4) are both provided with transverse holes (6); It also includes a single-head pin (10), one end of which passes through the transverse hole (6) and the insertion hole (9) opened on the side of the cone head section (8), and the end of the single-head pin (10) is fixedly mounted with a screw (11).

6. The device for efficiently replacing jaws of a drill pipe power tong according to claim 1, characterized in that: Two long blocks (12) with clamp teeth on one side are provided.

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