Lining oil tube and manufacturing process thereof

A manufacturing process and lining pipe technology, which is applied in the direction of drill pipe, casing, drilling equipment, etc., can solve the problems of accelerated lining pipe wear and distortion, slow speed of lining pipe shaping, and a large number of lining pipes, etc., to improve The effect of service life

Inactive Publication Date: 2017-06-13
NANTONG HUAYE PETROLEUM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 wh

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  • Lining oil tube and manufacturing process thereof

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Embodiment Construction

[0025] The following examples can enable those skilled in the art to understand the present invention more comprehensively, but the present invention is not limited to the scope of the described examples.

[0026] Such as figure 1 A lined oil pipe and its manufacturing process are shown, including an oil pipe 1, an inner liner pipe 2 and an oil pipe collar 3; the two ends of the oil pipe 1 are provided with external thread structures, and the two ends of the oil pipe collar 3 are provided with internal thread structures, corresponding The adjacent oil pipes 1 are threaded through the oil pipe collar 3; the oil pipe 1 has a built-in inner liner 2 with an interference fit with it, and the inner liner 2 is flanged at the nozzle of the oil pipe along the radial direction of the oil pipe to form a flanged nozzle. The outer diameter of the flanging nozzle is smaller than the minor diameter of the external thread of the oil pipe; a guiding tapered surface is arranged on the outer sur...

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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...

Claims

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Application Information

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IPC IPC(8): E21B17/00E21B17/042
CPCE21B17/00E21B17/0426
Inventor 陆华飞李荣明孙昌平张翔
Owner NANTONG HUAYE PETROLEUM MACHINERY
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