Wellhead anti-rotation device

Abstract

The invention relates to the technical field of oil and gas exploitation, in particular to a wellhead anti-rotation device. The wellhead anti-rotation device comprises a fixing disc, two baffle plates, a torsion bearing block and a square oil pipe; a through hole is formed in the middle of the fixing disc, and an opening for making the square oil pipe enter is formed in one side of the fixing disc, and communicated with the through hole; a fixed matching surface is arranged on the opposite side, located on the opening, of the side wall of the fixing disc; two baffle plates are arranged at thetop of the fixing disc, and one end of each baffle plate is in matching fixing with the fixed matching surface; the torsion bearing block is hinged between the two baffle plates and located above thefixed matching surface, a matching round hole is formed in the outer end of the torsion bearing block, and matching grooves are formed in the torsion bearing block; a plurality of matching concave surfaces are formed in the outer wall of the square oil pipe, and matched with the matching grooves to prevent the square oil pipe from rotating; the square oil pipe is connected with an oil pipe througha wellhead flange. The wellhead anti-rotation device disclosed by the invention has the beneficial effects of simple structure, ingenious design, convenience in use and low cost; the torsion bearingblock is matched with the square oil pipe, thereby being capable of preventing a tube column from rotating.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a wellhead anti-rotation device. Background technique [0002] Horizontal well technology began in the 1980s and is a comprehensive supporting technology, mainly used in oil field development to increase the single well production and recovery of oil and gas wells. With the development of industrial technology and the continuous deepening of people's understanding of horizontal well mining technology, the use of horizontal wells to develop oil fields has received extensive attention. At present, horizontal well mining technology has developed rapidly and is becoming more and more perfect. Therefore, there are more and more drilling and milling techniques for horizontal wells, and it is necessary to improve the drilling and repairing techniques and supporting tools. When the pipe string is milled and the drilling pressure is too large, the pipe string will be rev...

AI Technical Summary

Problems solved by technology

When the pipe string is milled and the drilling pressure is too large, the pipe string will be reversed, which will cause safety hazards in the entire pipe string and wellhead

In the prior art, the purpose of anti-rotation is mostly achieved through the anti-rotation tool in the well. The anti-rotation tool in the well includes the hydraulic anti-rotation tool in the well. This tool requires a l

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