Oil casing is a large-diameter pipe that plays a role in fixing the walls or wellbore of oil and natural gas wells. The casing is inserted into the wellbore and fixed with cement to help the wellbore separate the rock formations and prevent the wellbore from collapsing while ensuring the circulation of drilling mud to facilitate drilling and mining.

Steel grades of oil casing: H40, J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Casing end processing forms: short round thread, long round thread, partial trapezoidal thread, special buckle, etc. It is used in oil well drilling to support the well wall during the drilling process and after well completion to ensure the drilling process and the normal operation of the entire oil well after completion.

The important position of oil tubing: The petroleum industry is an industry that uses a lot of Oil tubing. Oil tubing occupies a very important position in the petroleum industry:
1. Oil tubing uses a lot of money and costs a lot, so it has huge potential to save expenses and reduce costs. The consumption of oil well pipes can be calculated based on the annual drilling footage. According to the specific conditions of our country, roughly 62kg of oil well pipe is required for every 1m of drilling, including 48kg of casing and 10kg of tubing. Drill pipe 3kg, drill collar 0.5kg;
2. The mechanics and environmental behavior of Oil tubing have an important impact on the petroleum industry’s adoption of advanced technology and increased production and efficiency;
3. Oil tubing failure will cause huge losses, and its safety, reliability, and service life are of great concern to the petroleum industry.