Impactor for loosening tubing coupling threads

Abstract

The invention provides an impactor for releasing screw threads of a tubing coupling. The tubing coupling is connected with a tubing thread, and is clamped by a tubing elevator; a tubing is elevated above the well mouth by an operation machine; two hydraulic devices are arranged on the edge of the upper end face of a terminal pad in a bilaterally symmetrical manner, and upper ends of pistons of the two hydraulic devices are connected into a whole by a connecting cross beam; an impact body is hoisted on the connecting cross beam, a through hole is formed in the terminal pad, and the impact body is aligned to the through hole; two suspension rods are arranged on the edge of the upper end face of the terminal pad in a back-and-forth symmetrical manner, a hook is connected to each upper end of the two suspension rods, and the two hooks can be suspended on the big hook of the operation machine; the tubing coupling runs through the through hole in the terminal pad and is positioned under the impact body, the impact body is aligned to the tubing coupling, the hydraulic devices are operated to drive the impact body to reciprocate up and down and impact the tubing coupling above the tubing coupling, and the connecting screw threads of the tubing coupling and the tubing are released, so that the connecting screw threads can be detached by using a conventional tool, and violation operation can be avoided.

Description

technical field [0001] The invention belongs to the equipment used for oil field workover operations. It is installed on the hook of the operating machine above the oil pipe suspended at the wellhead, and is used to hit the oil pipe coupling to loosen the connecting thread of the oil pipe coupling. Specifically, it is a method for loosening the oil pipe coupling. Impactor for threads. Background technique [0002] The depth of most oil and water wells exceeds 2000m. It is necessary to run tubing with a length matching the depth in the well. The length of the tubing is generally 9.5m. The 2000m tubing is composed of many 9.5m long tubing connected by tubing collars. These oil pipes will be pulled out one by one during well workover, and the connecting thread of the oil pipe bottom and the oil pipe collar will be unloaded when pulling out the oil pipes to realize the operation of pulling out the oil pipes one by one. Because some oil pipes have been used in the well for a cer...

AI Technical Summary

Problems solved by technology

Because some oil pipes have been used in the well for a certain period of time, the connecting thread of the oil pipe and the oil pipe coupling has corrosion problems, and the connecting thread of the oil pipe and the oil pipe coupling cannot be loosened by using ordinary thread removal tools.

At present, the way to solve this problem on site is to replace the high-power hydraulic screwing machine. This method is time-consuming and laborious. Replacing the high-power hydraulic screwing machine will also damage the oil pipe and reduce the service life of the oil pipe.

Sometimes on site, in order to save time and reduce construction troubles, the method of manually hitting the coupling of the oil pipe with a sledgehammer is used to loosen the connecting thread.

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