The oil casing is a large-diameter pipe that acts as a fixed oil and gas well wall or wellbore. The casing is inserted into the wellbore and fixed with cement to prevent the wellbore from separating the formation and the wellbore from collapsing, and to ensure that the drilling mud circulates for drilling.
Steel grades for oil casings: H40, J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Casing end machining form: short round thread, long round thread, trapezoidal thread, special buckle, etc. It is mainly used for oil well drilling mainly for supporting the well wall during and after drilling to ensure the drilling process and the normal operation of the entire well after completion.
The important position of the oil pipeline
The oil industry is an industry that uses a large number of oil pipes. Oil pipes play an important role in the oil industry:
1. The oil pipe has a large amount of consumption and spends a lot of money, and has great potential for saving expenses and reducing costs. The consumption of oil well pipes can be calculated based on the annual drilling scale. According to the specific conditions of China, 62kg of oil well pipe is required for every 1m drilled, including 48kg casing and 10kg oil pipe. Drill pipe 3kg, drill collar 0.5kg;
2. The mechanics and environmental behavior of petroleum pipelines have an important impact on the adoption of advanced technologies and increased production and efficiency in the petroleum industry;
3. The loss of oil pipe failure is huge, and its safety, reliability and service life are of great importance to the petroleum industry.