Anti-corrosion drill pipe for oil field drilling and its anti-corrosion treatment process
A technology for anti-corrosion treatment and oil field drilling, applied in the field of oil well drill pipes, can solve problems such as corrosion and serious drill pipes, and achieve the effects of prolonging service life, improving hydrogen sulfide resistance, and improving drilling efficiency
Active Publication Date: 2016-01-20
SHENGLI OILFIELD SHENGXIN ANTISEPSIS
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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
Method used
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Experimental program
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Effect test
Embodiment Construction
[0005] Anti-corrosion drill pipe for oil field drilling and its anti-corrosion treatment process mainly include five processes of high-temperature degreasing, pickling, activation, anti-corrosion treatment and heat treatment. The high-temperature degreasing process is to determine the temperature and time of high-temperature degreasing according to the actual situation of the drill pipe. The temperature is 300-450°C, and the time is 2-5 hours. The temperature and time depend on the amount of oil on the drill pipe and the material of the drill pipe. ;The drill pipe enters the pickling process after degreasing and derusting. The pickling formula is 100-300g / L sulfuric acid, 100-350g / L hydrochloric acid, and the time is 5-20 minutes. The pickling concentration and time vary depending on the material of the drill pipe. The drill pipe enters the activation process after the pickling process. The activation formula is sulfuric acid 100-400g / L, and the time is 15-25 minutes. The activ...
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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...
Claims
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IPC IPC(8): C25D3/12
Inventor 赵华翔任伟王建春许文忠周泉梅海瑛
Owner SHENGLI OILFIELD SHENGXIN ANTISEPSIS