Ring Drill Power Tong

Abstract

The invention provides an annular drill pipe power tong. The annular drill pipe power tong includes a base and a clamping mechanism, the base has a central through hole, and the clamping mechanism includes: a driving assembly; a gland assembly, and the driving assembly can drive the gland assembly Move along the axial direction of the central through hole; multiple power tong slips are distributed along the circumference of the central through hole; connecting rod, one end of the connecting rod is hinged with the gland assembly, and the other end of the connecting rod is connected with the power tongs The shoes are hinged, and when the drive assembly drives the gland assembly to move along the axis of the central through hole, the gland assembly can drive the power tong slips to surround or expand radially of the central through hole through the connecting rod. Through the annular drill pipe power tong of the present invention, it can realize the clamping of the drill pipe in the continuous cycle drilling process, and can provide sufficient clamping force for the drill pipe, ensuring that the annular drill pipe power tong, the drill pipe and the drill pipe are clamped. There is no relative sliding between the clamping mechanisms, and the indentation on the drill pipe is guaranteed to be as small as possible.

Description

technical field [0001] The invention relates to the field of drilling equipment in the petroleum industry, in particular to an annular drill pipe power tong. Background technique [0002] Continuous circulation drilling achieves stable equivalent circulation density and uninterrupted cuttings discharge during the entire drilling period, which improves wellbore conditions and drilling safety in an all-round way. This technology is especially suitable for safe drilling under the condition of narrow drilling fluid density window. In addition, in extended-reach wells, horizontal wells, high-pressure / high-temperature wells, and underbalanced wells, this technology can ensure that the well wall does not collapse to the greatest extent, avoid stuck pipe, reduce drilling accidents, and increase the ROP. [0003] The power tongs in the prior art are the key components of the main engine of the continuous circulation drilling device. They are mainly composed of four parts: the base, ...

AI Technical Summary

Problems solved by technology

Therefore, the power tongs used for continuous circulation drilling must be able to provide sufficient clamping force to ensure that after the power tong slips clamp the drill pipe, there will be no relative sliding between the power tong slips and the drill pipe, and ensure the indentation of the drill pipe As small as possible, the power tongs in the prior art cannot guarantee that the power tongs can reliably and safely clamp the drill pipe body to realize the functions of turning buckle and make-up and breakout

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