Renewed superhigh intensity distortion-resistant anti-corrosive oil well pipe and its process

Abstract

The invention relates to a refreshed oil-well pipe with ultra strength, deformation resistance and corrosion resistance and a technique for the same, belonging to the manufacturing and refreshing of an oil-well pipe during the process of oil production engineering technical field. The oil-well pipe is formed by connecting an oil-well pipe body and external upset end heads on both ends; an area between welded seams of the internal surface and the external surface of the oil-well pipe body is provided with a plasticized modified epoxy powder protective layer; the external surfaces of the external upset end heads except a threaded section are provided with a self-fluxing high-strength alloy anticorrosive and abrasion-resistant layer, and the internal surfaces of the external upset end heads and an external thread area are provided with a tungsten alloy plated anticorrosive and abrasion-resistant layer; pipe head upsetting wall-thickness external upsets on both ends of the oil-well pipe body are connected with the external upset end heads on both ends; and the surface of the oil-well pipe body is provided with a strengthening layer. The technique for the oil-well pipe makes the oil-well pipe achieve the aims of high strength, stretch resistance, pressure resistance, deformation resistance and corrosion resistance mainly through the procedures of pipe selection, cleaning, straightening, fault detection, dimensioning, leveling of an end face, pipe head upsetting, tempering in a large furnace, friction welding, finishing processing of the welded seams, tempering of the welded seams, nondestructive flaw detection of the welded seams, surface strengthening and anticorrosive treatment.

Description

technical field [0001] The invention relates to a refurbished ultra-high-strength anti-deformation and anti-corrosion oil well pipe and its technology, belonging to the technical field of oil well pipe manufacture and refurbishment in oil production engineering. Background technique [0002] During oil and gas development, the existing oil well pipes are subjected to various loads and the joint action of different corrosive media, which greatly reduces the service life of the oil well pipes. The oil well pipes need to be replaced regularly. Over the years, a large number of waste oil well pipes have been replaced by various oil fields. , resulting in a serious waste of resources. [0003] At present, the repair of old oil well pipes is simply repeated picking and buckling, which cannot fundamentally improve the performance of oil well pipes, which is time-consuming, laborious, and affects oilfield operations. Therefore, it is an important measure to make full use of idle ol...

AI Technical Summary

Problems solved by technology

[0002] During oil and gas development, the existing oil well pipes are subjected to various loads and the joint action of different corrosive media, which greatly reduces the service life of the oil well pipes. The oil well pipes need to be replaced regularly. Over the years, a large number of waste oil well pipes have been replaced by various oil fields. , resulting in a serious waste of resources

[0003] At present, the repair of old oil well pipes is simply repeated picking and buckling, which cannot fundamentally improve the performance of oil well pipes, is time-consuming, laborious, and affects oilfield operations

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