Tubular column two-way coupling integrated self-adaptive traveling slip

Abstract

The invention discloses a tubular column two-way coupling integrated self-adaptive traveling slip. Specifically, the self-adaptive traveling slip comprises a shell, an upper slip assembly and a lowerslip assembly, and through the matched connection action of the upper and lower slip assemblies and a rotating shaft and the matched connection action of a transmission shaft and the rotating shaft, compared with a single traveling slip or a separated upper and lower slip set, the two-way traveling slip is larger in clamping force on a pipe string and higher in reliability; and the technical problems that in the prior art, a traveling slip set is complex in structure and tedious in operation, and misoperation possibly occurs to cause incorrect limitation of the direction of a tubular column are solved.

Description

technical field [0001] The invention relates to the technical field of shale gas exploitation, in particular to a bidirectionally coupled integrated self-adaptive swimming slip of a pipe string. Background technique [0002] In recent years, the proven reserves of shale gas in my country have grown rapidly, and shale gas mining technology has also made significant progress. Among them, snubbing operation is an important process of shale gas exploitation, and the key technology is to control the pressure in the oil pipe and the annular space of the oil casing and overcome the upward force of the pipe string. In order to overcome the upward force of the pipe string, a fixed slip and a floating slip are usually used to alternately clamp the pipe string. The fixed slip structure is relatively simple, and the technology is relatively mature. However, the development time of swimming slip technology is relatively short, and the technology is relatively imperfect. [0003] In th...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a self-adaptive swimming slip with two-way coupling of the pipe string, aiming to solve the problems in the prior art that the structure of the swimming slip group is complicated, the operation is cumbersome, and the operation error may cause unforeseen failures. Technical issues that can correctly limit the direction of the pipe string

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