Waste and old oil well pipe performance recovery process

A technology for oil well pipes and waste, which is applied in the field of performance restoration of waste oil well pipes. It can solve the problems of high energy consumption in smelting waste oil well pipes, pollute the environment, and the inability to fundamentally restore the original specifications and mechanical properties of oil well pipes. The effect of tissue densification

Active Publication Date: 2012-07-18
梅河口市弘业无缝钢管有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that a large number of waste oil well pipes produced in oilfield production consume a lot of energy for smelting, pollute the environment, and the original specifications, sizes and mechanical properties of oil well pipes cannot be fundamentally restored when repairing waste oil well pipes by conventional methods. A performance recovery process for waste oil well pipes

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  • Waste and old oil well pipe performance recovery process

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Embodiment Construction

[0028] The waste oil well pipe performance recovery process described in the present invention is as follows:

[0029] The first step, heat treatment: transport the waste oil well pipe to a multi-line roller hearth continuous heat treatment furnace for heating, the heating temperature is 860±10°C, during the heating process, the residual oil stain on the waste oil well pipe can be burned off, and the heated The waste oil well pipe is transported to the cooling table for natural cooling, and after cooling, it is straightened by a straightening machine to loosen the residues on the inner and outer surfaces of the waste oil well pipe, and an air compressor is used to blow high pressure on the inner and outer surfaces of the waste oil well pipe, and the above The residues are completely removed;

[0030] The second step, sorting treatment: check the waste oil well pipes processed in the first step, and cut off the waste oil well pipes whose inner wall wear depth is ≥ 3mm; the wast...

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Abstract

The invention discloses a waste and old oil well pipe performance recovery process which comprises the following steps: (1) heating; (2) sorting; (3) carrying out constant-diameter wall reducing; (4) carrying out heat diffusion; (5) carrying out negative-tension diameter reducing; (6) sorting and dimensioning; (7) stretching and carrying out a hydraulic test: stretching the sorted and dimensioned waste and old oil well pipes, and carrying out the hydraulic test; and (8) packaging: packaging the detected and qualified waste and old oil well pipes, and putting into service. The waste and old oil well pipe performance recovery process has the advantages that the waste and old oil well pipes are reforged, so that the repaired oil well pipes are more compact in internal structures, higher in corrosion resistance and higher in wear resistance, the waste and old oil well pipes are subjected to same-specification regenerative repair to meet the specification and the API (American Petroleum Institute) standard requirements, and the purposes of saving energy, reducing consumption and changing waste materials into valuable materials are achieved.

Description

technical field [0001] The invention relates to a performance recovery process of an oil well pipe, in particular to a performance recovery process of a waste oil well pipe. Background technique [0002] At present, a large number of waste oil well pipes are produced in oil field production. At present, there are usually two ways to deal with waste oil well pipes: one is to treat them as scrap steel and return them to the furnace for smelting; the other is to carry out simple repair treatment. [0003] Using the first method will cause a great waste of resources, consume a lot of energy, and pollute the environment; the second treatment method uses heating or cleaning with a cleaning agent, and after rust removal, select a good state to reprocess the end thread, which is complete repair work. The service life of the waste oil well pipe repaired by this method is not long, and the corrosion points, eccentric wear parts, scratched parts and stuck parts of the inner surface ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
CPCY02P70/10
Inventor 吕学民
Owner 梅河口市弘业无缝钢管有限公司
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