Petroleum special pipe is mainly used for oil, gas well drilling, and oil, and gas transportation. It includes an oil drill pipe, oil casing, and pumping pipe. The oil drill pipe is mainly used to connect the drill collar to the drill bit and transfer drilling power. The oil casing is mainly used to support the good wall during the drilling process and after the completion of the well, so as to ensure the drilling process and the normal operation of the whole well after the completion. The pumping pipe mainly carries oil and gas from the bottom of the well to the surface.

Oil casing is the lifeline of oil well operation. Due to the different geological conditions, the underground stress state is complex, and the comprehensive action of tensile, compressive, bending, and torsional stresses on the pipe body puts forward higher requirements for the quality of the casing itself. If the casing itself is damaged for any reason, it can lead to the loss of production or even abandonment of the whole well.

According to the strength of the steel itself, the casing can be divided into different steel grades, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Other good conditions, well depth, and the use of steel grade is also different. The casing itself is also required to have corrosion resistance in a corrosive environment. The casing is also required to be resistant to crushing in places with complex geological conditions.

Use of oil casing

Oil casing is a kind of large-caliber pipe, which plays the role of fixing oil and natural gas well walls or well holes. The casing is inserted into the borehole and cemented to help keep the borehole apart from rock layers and prevent it from collapsing while allowing drilling mud to circulate and flow to facilitate drilling.

Steel class of OIL casing: H40, J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. 

Casing end processing form: short round thread, long round thread, trapezoidal thread, special buckle, etc. It is mainly used to support the well wall during the drilling process and after the completion of the well, so as to ensure the normal operation of the whole oil well after the drilling process.

The important position of an oil pipeline

The petroleum industry is a large number of use oil pipe industry, oil pipe in the petroleum industry occupies a very important position:

1. The amount of oil pipeline is large, the money is more, and the potential of saving expenses and reducing costs is huge. The consumption of oil well tubing can be calculated based on the annual drilling ruler. According to the specific situation in our country, in general, it takes oil well pipe 62kg for every 1M drilling, including 48kg casing and 10kg oil pipe. Drill pipe 3kg, drill collar 0.5kg;

2. The mechanics and environmental behavior of the petroleum pipeline have an important impact on the use of advanced technology and production increase and efficiency in the petroleum industry;

3. The loss of oil pipeline failure is enormous, and its safety, reliability, and service life are of great importance to the petroleum industry.