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Back tong for top-drive drilling unit

A back tong and drilling technology, which is applied in the field of back tongs of top drive drilling equipment, can solve problems such as scratching, wearing drill pipes, and reducing the service life of back tongs, so as to avoid wear, work safely and reliably, and have uniform locking force Effect

Active Publication Date: 2009-05-06
BEIJING CSR TIMES LOCOMOTIVE & ROLLING STOCK MECHANICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the object of the present invention is to provide a top-driven drilling device back tong to solve the problem that the drilling device back tong in the prior art is easy to cause wear and scratches on the drill pipe, thereby reducing the service life of the back tong

Method used

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  • Back tong for top-drive drilling unit
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  • Back tong for top-drive drilling unit

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Embodiment Construction

[0023] The core of the present invention is to provide a back tong of a top drive drilling device, which includes a back tong shell and a pair of tong heads consisting of a left tong head and a right tong head. The shell moves left and right with the clamp head floating mounting seat. A hydraulic cylinder is installed on one side of the inner cavity of the floating mounting seat. The hydraulic cylinder floats left and right through the change of internal oil pressure. on the side wall of the hydraulic cylinder.

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] The structure of the back tong of the top drive drilling device of the present invention is a...

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Abstract

The invention discloses a back tong of a top-driving well drilling device. The back tong comprises a back tong shell and a pair of tongs consisting of a left tong head and a right tong head; the back tong also comprises a tong head float mounting seat which can move right and left along the shell; one side of an inner cavity of the float mounting seat is provided with a hydraulic cylinder; the hydraulic cylinder float right and left through the pressure change of inner oil liquid; and the pair of the tong heads are connected with the float mounting seat and the sidewall of the hydraulic cylinder respectively. When the back tong of the top-driving well drilling device is shackled, the back tong can realize the effects of the reliable clamping of the back tong and the even and consistent locking force of the left tong head and the right tong head, and avoid the problems that the back tong is worn and a drill stem is scratched and needs mechanical strengthening; and when the shackling is finished and is loosened, the back tong can keep proper distance with the drill stem, has the same clearance with the drill stem, prolongs the service cycle and replacement cycle of the back tong so that the whole top-driving well drilling device is safer and more reliable.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to a back tong of a top drive drilling device. Background technique [0002] In recent years, with the continuous development of drilling equipment and in order to better meet the needs of drilling special process wells, a top drive drilling device has been developed. The device combines the faucet with the motor to drive the drill tool and the drill bit to rotate in the upper part of the derrick space, and is equipped with a make-up and break-out device for the drill pipe, which can complete various drilling operations. Since the top drive drilling device is a new type of oil drilling equipment, it has the function of make-up and break-out, and can perform make-up and break-out operations at any height of the derrick, and the function of make-up and break-out is completed through the back clamp of the top drive drilling device. Clamping the drill pipe, while the hydraulic power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B3/02E21B19/16
Inventor 李昂
Owner BEIJING CSR TIMES LOCOMOTIVE & ROLLING STOCK MECHANICS
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