Equal-diameter and equal-thickness repairing process for hot-rolled plastic deformation oil field waste oil pipe

Abstract

The invention discloses an equal-diameter and equal-thickness repairing process for a hot-rolled plastic deformation oil field waste oil pipe. The equal-diameter and equal-thickness repairing process comprises the steps that firstly, dirty oil and dirt in an inner hole of the waste oil pipe are removed; secondly, a coupling is cleaned, and multi-element ion implantation is carried out; thirdly, residues on the inner surface and the outer surface of the waste oil well pipe are loosened; fourthly, the residues are removed; fifthly, the wall is reduced by 1.2 mm + / -0.2 mm, and the diameter is expanded by 15 mm + / -2 mm; sixthly, the two ends of a pierced billet are upset; seventhly, the wall thickness and the outer diameter of the repaired oil well pipe meet the requirements of the API 5CT standard; eighthly, the straightness of a hollow billet is required to meet the standard requirement; ninthly, the hollow billet meets the requirement for the standard length of a polished pipe; tenthly, thread machining is carried out; eleventhly, whether the physical performance indexes of the oil pipe meet the requirements of the API 5CT standard or not is judged; and twelfthly, packaging and delivering are carried out for use. The repairing process has the beneficial effect that the repairing process is a leading technology, and the low-carbon economy of turning waste into wealth in a real sense is realized.

Description

technical field [0001] The invention relates to a process for repairing waste oil pipes in oilfields, in particular to a process for repairing waste oil pipes in hot-rolled plastic variable oilfields with equal diameter and thickness. Background technique [0002] At present, the repair of waste oil pipes in various domestic oil fields is simply to clean the old oil pipes in good condition, re-thread or add inner lining for repair. The remaining 2 / 3 continue to corrode in the open air. [0003] Waste oil pipes are not allowed to be disposed of at will as fixed assets, so the stock of waste oil pipe resources in major oil fields across the country is particularly large, which is a great waste of resources and idle state-owned assets. The high cost of storage is a waste of resources, idle assets and funds. precipitation. Through painstaking research, a set of waste oil pipe hot-rolled repair technology was born, which is a scientific and reasonable circular economy and low-c...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the service life of the waste oil well pipe after repairing by the existing oil field waste oil pipe repair process is not long, the surface corrosion, partial wear, scratch, jam and other parts have not been completely repaired, and various mechanical properties cannot be achieved. A repair process of equal diameter and thickness for waste oil pipes in hot-rolled plastic oilfields to meet the requirements of the specification and the "API" standard of the American Petroleum Institute

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