Anti-corrosion drill pipe for oil field drilling and its anti-corrosion treatment process

Abstract

The invention provides an anti-corrosion drill rod for well drilling of an oilfield, which has the advantages of resistance to high temperature and high pressure, corrosion resistance, anti-scaling property, scouring resistance and resistance to corrosion of hydrogen sulfide and carbon dioxide, as well as an anti-corrosion treatment process thereof. The technical scheme is as follows: the anti-corrosion treatment process mainly comprises five process steps of high-temperature oil removal, acid washing, activation, anti-corrosion treatment and heat treatment. After the ordinary drill rod is treated by the process provided by the invention, the failure problems of thorn formation, perforation and brittle fracture of a rod body of the drill rod caused by corrosion and a hydrogen sulfide environment during drilling and production process of the oilfield can be effectively solved, the anti-corrosion and anti-hydrogen sulfide capability of the drill rod can be improved by 7 times, the efficiency of well drilling is greatly improved, the service life of the drill rod is prolonged, and the anti-corrosion drill rod has excellent economic benefits and social benefits and is suitable for general popularization and application.

Description

technical field [0001] The invention relates to the technical field of oil well drill pipes, in particular to an anti-corrosion drill pipe for oil field drilling and an anti-corrosion treatment process thereof. Background technique [0002] Due to different geological conditions, the quality of drilling oil production is uneven. Most of them contain a large amount of sediment, impurities and sandstone. In service, this harsh environment greatly reduces the service life of the drill pipe. The main cause of drill pipe corrosion is that the mud was not scraped when the drill was pulled out, and the mud film adhering to the outer wall of the drill pipe left iron ore powder, barite, soil powder, carbonic acid after the water volatilization process in the air and the formation of mud cake shell Calcium powder and other solid-phase substances as the skeleton are called scale layers. The scaling layer is in contact with the surface of the drill pipe, resulting in three interrelate...

AI Technical Summary

Problems solved by technology

As the drilling environment becomes more and more harsh and the drilling footage gets deeper and deeper, the corrosion of the drill pipe becomes more and more serious. The existing coated drill pipe cannot meet the needs of field use. A new type of surface treatment for the drill pipe is sought. Technology is more and more urgent