Development Status of Oil Casing Pipe

With the development of oil and gas drilling operation to deeper, higher pressure, higher temperature and other more stringent working conditions, as well as the continuous improvement of oil drilling technology, conventional casing pipe thread has been difficult to meet the development needs of the oil field.


At present, there are more and more high pressure oil and gas wells. Ordinary API threaded pipe can not meet the requirements of high pressure sealing. For oil and gas wells with pressure higher than 28Mpa, most choose snap on tubing with special air tightness. With the development of more and more oil and gas wells containing H2S / CO2 / CL, ordinary low-carbon and low-alloy steel pipe can not adapt to harsh corrosion environment, and its service life can not meet the design requirements of petroleum. And gas wells, so 9Cr, 13Cr. The application of corrosion-resistant materials such as 22Cr and 25cr is more and more extensive.