Waste and old oil well pipe performance recovery process

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...

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