Tensioner for repairing lined oil pipe and its repairing process

Abstract

The invention provides a tensioner for repairing a lining oil pipe and a repair technology thereof. The tensioner is suitable for repairing of the lining oil pipe used in the oil industry, simplifies the repair technology and reduces machining cost. The tensioner for repairing the lining oil pipe comprises tensioning pieces, spring steel rings and a tensioning mechanism, wherein the tensioning pieces are combined to a connecting rod of the tensioning mechanism through the spring steel rings in a circular mode. The repair technology includes the steps of external washing, internal washing and inspection classification. After inspection classification, processes sequentially carried out are as follows: the tensioner is installed, the lining oil pipe is shaped, a pipe head is cut, threads of an oil pipe body are turned, the lining oil pipe is heated, the edge of the lining oil pipe is turned and the tensioner is dismantled. The current situations that according to an existing technology, a pipe product of a lining oil pipe cannot be longer than an oil pipe body and liner remachining has to be carried out are solved. By means of the tensioner, liner remachining does not need to be carried out on the lining oil pipe with the damaged threads and damaged turned edge, machining cost is greatly reduced, the defects that the existing repair technology is high in complexity and high in repair cost are compensated, and the use cycle of the lining oil pipe is prolonged.

Description

technical field [0001] The invention relates to a repair process for lined oil pipes in the petroleum industry, in particular to a tensioner for repairing lined oil pipes and a repair process thereof, which is suitable for repairing lined oil pipes, simplifies the repair process, and reduces processing costs. Background technique [0002] Polyethylene composite oil pipe is made of ultra-high molecular weight polyethylene pipe lined into ordinary oil pipe through a certain process, and processed into composite oil pipe. The product has excellent properties such as extremely high wear resistance, corrosion resistance, temperature resistance, impact resistance, aging resistance, self-lubricating property, self-repairing property, non-stickiness, and high pressure resistance. It is especially suitable for eccentric wear wells, Seriously corroded oil and water wells, therefore, in recent years, more and more oil companies have expressed their favor for this product. As time went...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a tensioner for repairing lined oil pipes and its repair process, to solve the problem of huge cost of lining oil pipes such as thread damage and flanging damage using the existing drag lining repair method, and to use the tensioner to fix the inner liner Oil pipe, with thread processing and other processes, simplifies the repair process and reduces processing costs

Images