Casing power tongs with automatic righting mechanism

Abstract

The utility model relates to the relevant technical field of casing pipe power tongs, in particular to a casing pipe power tong with an automatic righting mechanism, which comprises a tong disc and a lantern ring, a hydraulic power disc is mounted in the tong disc, a righting fixing mechanism penetrates through the middle of the hydraulic power disc, the lantern ring is fixedly connected to the top end of the righting fixing mechanism, and the righting fixing mechanism is fixedly connected with the hydraulic power disc. According to the utility model, the air bag clamp and the arc-shaped clamp are sleeved on the sleeve, the sleeve can be pre-installed and positioned, and the air bag clamp and the arc-shaped clamp are pneumatically driven by the pneumatic pipe, so that the air bag clamp is expanded to clamp the outside of the sleeve, and the air bag clamp and the arc-shaped clamp are clamped by the gear motor. The sleeve power tongs are arranged on a sleeve in a pre-sleeving mode through the arc-shaped clamp, when the sleeve power tongs are clamped through a gear motor and an air bag, the sleeve can be pre-assembled and positioned, the sleeve power tongs are clamped through the gear motor and the air bag, rotation of the tongs around a tubular column due to torque force is facilitated, and reaction torque is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of casing power tongs, in particular to a casing power tong with an automatic righting mechanism. Background Art

[0002] The casing power tongs are driven by a hydraulic motor. The motor adopts a single or double transmission structure. The driving force is provided by a gear box and a hydraulic power device. The liquid and gas are jointly driven, and the tightening and rotation are achieved by a gear motor and an air bag. During operation, the casing tongs are suspended on the wellhead with a steel cable, and a spare rope is used to prevent the tongs from rotating around the pipe string due to torque force, and to provide counter-torque.

[0003] When the existing casing power tongs use gear motors and air bags for clamping, it is difficult to pre-position the casing, resulting in deviations in the clamping of the gear motors and air bags. This causes the tongs to rotate around the pipe column due to torque force and provide opposite torque. After straightening, it needs to be installed a second time for auxiliary straightening, which requires manual installation and causes deviations in the auxiliary straightening. Utility Model Content

[0004] The utility model aims to provide a casing power tongs with an automatic righting mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution, the casing power tongs with automatic righting mechanism: comprising a pliers disc and a collar, a hydraulic power disc is installed inside the pliers disc, and a righting and fixing mechanism is passed through the middle of the hydraulic power disc, the collar is fixedly connected to the top of the righting and fixing mechanism, a gear disc is fixed to the rear end of the pliers disc, and a gear motor is movably installed at the top of the gear disc, positioning bolts are arranged around the top of the pliers disc, a fastening disc is threadedly connected to the bottom end of the pliers disc, and an automatic righting clamping mechanism is installed at the bottom end of the righting and fixing mechanism.

[0006] Preferably, the hydraulic power disc and the straightening and fixing mechanism are movably connected, and the straightening and fixing mechanism and the collar are fixedly connected.

[0007] Preferably, the clamp disc is threadably fastened to the fastening disc via positioning bolts.

[0008] Preferably, the automatic righting clamping mechanism comprises a pneumatic tube, an airbag clamp and an arc-shaped clamp, the airbag clamp is installed inside the arc-shaped clamp, and pneumatic tubes are arranged on both sides of the arc-shaped clamp.

[0009] Preferably, the airbag clamp and the arc clamp are driven by a pneumatic tube to perform clamping.

[0010] Preferably, the straightening and fixing mechanism comprises a pneumatic lifting rod and a through ring, and the bottom end of the pneumatic lifting rod is penetrated by the through ring.

[0011] Preferably, the pneumatic lifting rod and the through-ring are pneumatically locked on the hydraulic power disc.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model provides an airbag clamp and an arc clamp, which are sleeved on the casing to pre-install and position the casing. The airbag clamp and the arc clamp are pneumatically driven by a pneumatic tube so that the airbag clamp expands and clamps on the outside of the casing. The arc clamp is pre-sleeved on the casing. When the casing power tongs are clamped by a gear motor and an airbag, the casing can be pre-installed and positioned. The gear motor and the airbag are clamped, which is conducive to the rotation of the tongs around the pipe column due to torque force and provides counter-torque.

[0014] 2. The utility model provides a pneumatic lifting rod and a through ring. The pneumatic lifting rod and the through ring on the sleeve rely on air pressure power to insert into the clamp plate and the hydraulic power plate, so as to pre-install the airbag clamp and the arc clamp for automatic straightening and clamping. After straightening, they need to be installed for secondary auxiliary straightening to prevent secondary auxiliary straightening deviation caused by manual installation. Therefore, the airbag clamp and the arc clamp are automatically straightened and pre-clamped, and then positioned and clamped by the pneumatic lifting rod and the through ring, so as to further improve the accuracy and stability of the auxiliary straightening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0016] Figure 2 This is a structural schematic diagram of the automatic righting clamping mechanism of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the righting and fixing mechanism of the utility model.

[0018] In the figure: 1. Clamp disc; 2. Hydraulic power disc; 3. Straightening and fixing mechanism; 4. Ring; 5. Gear motor; 6. Gear disc; 7. Positioning bolt; 8. Fastening disc; 9. Automatic straightening and clamping mechanism; 10. Pneumatic tube; 11. Airbag clamp; 12. Arc clamp; 13. Pneumatic lifting rod; 14. Through ring. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1

[0021] See also Figure 1-Figure 3 The utility model provides a technical solution, including a clamp disc 1 and a collar 4, a hydraulic power disc 2 is installed inside the clamp disc 1, and a straightening and fixing mechanism 3 is penetrated in the middle of the hydraulic power disc 2, the collar 4 is fixedly connected to the top of the straightening and fixing mechanism 3, a gear disc 6 is fixed to the rear end of the clamp disc 1, and a gear motor 5 is movably installed on the top of the gear disc 6, positioning bolts 7 are arranged around the top of the clamp disc 1, a fastening disc 8 is threadedly connected to the bottom end of the clamp disc 1, and an automatic straightening clamping mechanism 9 is installed at the bottom end of the straightening and fixing mechanism 3, the sleeve is installed on the clamp disc 1 and the hydraulic power disc 2, so that the straightening and fixing mechanism 3 and the collar 4 are movably installed on the clamp disc 1 and the hydraulic power disc 2, and auxiliary straightening installation is performed, and the positioning bolt 7 and the fastening disc 8 are threadedly penetrated. Positioning and installation are carried out around the clamp disc 1 and the hydraulic power disc 2, and then the gear motor 5 and the gear disc 6 provide driving force for the gear box and the hydraulic power device. The hydraulic and gas are driven jointly, and the hydraulic power disc 2 and the straightening and fixing mechanism 3 are movably connected, and the straightening and fixing mechanism 3 and the collar 4 are fixedly connected. The straightening and fixing mechanism 3 is movably installed on the hydraulic power disc 2, and the middle casing of the hydraulic power disc 2 can be fixedly installed. The straightening and fixing mechanism 3 and the collar 4 are secondary auxiliary reinforced on the casing for secondary auxiliary straightening clamping. The clamp disc 1 is threadedly fastened to the fastening disc 8 by the positioning bolts 7. The clamp disc 1 and the hydraulic power disc 2 are threadedly penetrated through the fixed casing by the positioning bolts 7 and the fastening disc 8, so that the casing power clamp can be fixed as a whole.

[0022] Embodiment 2

[0023] like Figure 2 and Figure 3As shown, the automatic straightening clamping mechanism 9 includes a pneumatic tube 10, an airbag clamp 11 and an arc clamp 12. The airbag clamp 11 is installed inside the arc clamp 12, and pneumatic tubes 10 are set on both sides of the arc clamp 12. The airbag clamp 11 and the arc clamp 12 are driven by the pneumatic tube 10 to clamp. The automatic straightening clamping mechanism 9 component is installed at the bottom of the clamp plate 1 and the hydraulic power disk 2 in a movable manner, so that the automatic straightening clamping mechanism 9 component is sleeved on the casing. The airbag clamp 11 and the arc clamp 12 are sleeved on the casing, and the casing can be pre-installed and positioned. The airbag clamp 11 and the arc clamp 12 are pneumatically driven by the pneumatic tube 10, so that the airbag clamp 11 is expanded and clamped on the outside of the casing, and is pre-sleeved on the casing by the arc clamp 12. When the casing power tongs adopt the gear motor 5 and the airbag to clamp the casing, the casing can be Pre-installation positioning, after clamping through the gear motor 5 and the airbag, it is beneficial for the pliers to rotate around the pipe column due to the torque force and provide counter-torque. The straightening and fixing mechanism 3 includes a pneumatic lifting rod 13 and a through ring 14. The bottom end of the pneumatic lifting rod 13 is penetrated by the through ring 14. The pneumatic lifting rod 13 and the through ring 14 are pneumatically locked on the hydraulic power disk 2. The airbag clamp 11 and the arc clamp 12 are mounted on the sleeve, and the sleeve can be pre-installed and positioned. After the airbag clamp 11 and the arc clamp 12 are pneumatically driven and clamped through the pneumatic tube 10, the pneumatic lifting rod 13 and the through ring 14 on the sleeve ring 4 are inserted into the pliers disk 1 and the hydraulic power disk 2 by relying on pneumatic power. The airbag clamp 11 and the arc clamp 12 can be pre-installed with automatic straightening clamping. After straightening, they need to be installed for secondary auxiliary straightening to prevent auxiliary straightening deviation caused by manual installation.

[0024] In actual use, the positioning bolt 7 and the fastening plate 8 are threaded through the clamp plate 1 and the hydraulic power plate 2 for positioning and installation, and then the gear motor 5 and the gear plate 6 provide driving force for the gear box and the hydraulic power device, and the airbag clamp 11 and the arc clamp 12 are mounted on the sleeve to pre-install and position the sleeve. After the airbag clamp 11 and the arc clamp 12 are clamped by the pneumatic tube 10 through the pneumatic drive, the pneumatic lifting rod 13 and the through ring 14 on the sleeve ring 4 are inserted into the clamp plate 1 and the hydraulic power device by relying on the pneumatic power. On the power disk 2, the airbag clamp 11 and the arc clamp 12 can be pre-installed with automatic straightening clamps, and the automatic straightening clamping mechanism 9 components are installed on the bottom of the clamp 1 and the hydraulic power disk 2 in a movable manner, so that the automatic straightening clamping mechanism 9 components are sleeved on the casing, and the airbag clamp 11 and the arc clamp 12 are sleeved on the casing, and the casing can be pre-installed and positioned. The airbag clamp 11 and the arc clamp 12 are pneumatically driven by the pneumatic tube 10, so that the airbag clamp 11 is expanded and clamped on the outside of the casing, and then pre-sleeved on the casing through the arc clamp 12.

[0025] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A casing power tong with an automatic righting mechanism, characterized in that: The casing power tongs with an automatic straightening mechanism include a tongs disc (1) and a collar (4); a hydraulic power disc (2) is installed inside the tongs disc (1), and a straightening and fixing mechanism (3) is passed through the middle of the hydraulic power disc (2); the collar (4) is fixedly connected to the top of the straightening and fixing mechanism (3); a gear disc (6) is fixed to the rear end of the tongs disc (1), and a gear motor (5) is movably installed at the top of the gear disc (6); positioning bolts (7) are arranged around the top of the tongs disc (1); a fastening disc (8) is threadedly connected to the bottom end of the tongs disc (1); and an automatic straightening clamping mechanism (9) is installed at the bottom end of the straightening and fixing mechanism (3).

2. A casing power tong with an automatic righting mechanism according to claim 1, characterized in that: The hydraulic power disc (2) and the straightening and fixing mechanism (3) are movably connected, and the straightening and fixing mechanism (3) and the sleeve ring (4) are fixedly connected.

3. The casing power tongs with an automatic righting mechanism according to claim 1, characterized in that: The clamp disc (1) is threadedly fastened to the fastening disc (8) via a positioning bolt (7).

4. The casing power tongs with an automatic righting mechanism according to claim 1, characterized in that: The automatic straightening clamping mechanism (9) comprises a pneumatic tube (10), an airbag clamp (11) and an arc-shaped clamp (12); the airbag clamp (11) is installed inside the arc-shaped clamp (12), and the pneumatic tube (10) is arranged on both sides of the arc-shaped clamp (12).

5. The casing power tongs with an automatic righting mechanism according to claim 4, characterized in that: The airbag clamp (11) and the arc-shaped clamp (12) are driven by a pneumatic tube (10) to perform clamping.

6. The casing power tongs with an automatic righting mechanism according to claim 1, characterized in that: The straightening and fixing mechanism (3) comprises a pneumatic lifting rod (13) and a through-hole ring (14), and the bottom end of the pneumatic lifting rod (13) is penetrated by the through-hole ring (14).

7. A casing power tong with an automatic righting mechanism according to claim 6, characterized in that: The pneumatic lifting rod (13) and the through ring (14) are pneumatically locked on the hydraulic power disc (2).

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