Lining oil tube and manufacturing process thereof

Abstract

The invention relates to a liner oil pipe and its manufacturing process, including oil pipe, liner pipe and oil pipe collar; the two ends of the oil pipe are provided with external thread structures, the two ends of the oil pipe collar are provided with internal thread structures, and the adjacent oil pipes pass through the oil pipe Coupling threaded connection; the oil pipe has a built-in liner pipe, and the inner liner pipe is flanged along the radial direction of the oil pipe at the nozzle of the oil pipe to form a flanged nozzle, and a guide cone is set on the outer surface of the flanged nozzle; by using raw materials Stirring, extrusion molding, oven preheating, interference fit, high temperature heating, lining flanging, ring cutting, end plug anti-shrinkage; eight steps to complete the production of lined oil pipes; adopt heat setting process to simulate lined oil pipes The temperature of underground oil extraction is fixed and installed, which avoids the situation that the inner liner extends out of the oil pipe due to the large expansion of the inner liner due to the temperature rise, which accelerates the wear and distortion of the inner liner, and improves the service life of the inner liner.

Description

technical field [0001] The invention relates to the field of petroleum equipment, in particular to a lining oil pipe and a manufacturing process thereof. Background technique [0002] The current oil-lined oil pipes all use anti-corrosion and wear-resistant liners built in the oil pipes, which can prevent the wear of the sucker rod and the inner wall of the oil pipe and the internal corrosion of the oil pipe. The surface of the lining pipe is smooth and flexible, which can prevent direct friction between the sucker rod and the inner wall of the oil pipe, and reduce the wear of the sucker rod. Therefore, the wear-resistant liner can protect both the oil pipe and the sucker rod at the same time. [0003] As described in Chinese patent 201620263869.X, a large-diameter lined oil pipe includes an oil pipe and a thin-walled liner. External threads are provided at both ends of the oil pipe, and the thin-walled liner is interference-fitted in the inner wall of the oil pipe; The th...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a lined oil pipe and its manufacturing process, which can solve the problem that the lined oil pipe extends out of the oil pipe due to thermal expansion when the lined oil pipe is driven into the high-temperature underground, and accelerates the wear of the lined pipe And the problem of twisting; and the problem of slow setting speed and poor effect of the inner liner at high temperature

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