Oil casingIt is a steel pipe used to support the well wall of oil and gas wells to ensure the normal operation of the entire oil well during drilling and after completion. According to different drilling depth and geological conditions,.Several layers of casing shall be used for each well. After running the casing, cement shall be used for well cementing,.Unlike tubing and drill pipe, it cannot be reused. It is a disposable consumable material..Therefore, the consumption of casing accounts for all oil well pipes.70%Above.

Casing can be divided:Conduit, surface casing, technical casing and reservoir casing.

Oil casing;Definition

Special tubing is mainly used for drilling oil and gas wells and transporting oil and gas..It includes oil drill pipe, oil casing and oil pumping pipe. Oil drill pipe is mainly used to connect drill collars and drill bits,.Transfer drilling power. Oil casing is mainly used to support the well wall during drilling and after completion,.To ensure the normal operation of the entire well during drilling and after completion..The oil pumping pipe mainly transports the oil and gas at the bottom of the well to the surface.

Oil casing is the lifeline of oil well operation. Due to different geological conditions, the underground stress state is complex, and the tensile, compressive, bending and torsional stresses act on the pipe body,.The quality of the casing itself is put forward higher requirements. Once the casing itself is damaged for some reason,.The production of the whole well may be reduced or even scrapped.

According to the strength of the steel itself, the casing can be divided into different steel grades, namelyJ55,K55,N80,L80,C90,T95,P110,Q125,V150Wait..Different steel grades are used for different well conditions and well depths. In a corrosive environment, the casing itself is required to have corrosion resistance. In complex geological conditions, the casing is required to have the ability to resist collapse.

Oil casing;Use

Oil casing is a large diameter pipe,.The well wall or borehole of the oil and gas well can be fixed. Casing is inserted into the borehole and fixed with cement to help the borehole separate the rock formation,.Prevent borehole collapse, while ensuring drilling mud circulation flow for drilling and production.

Steel grade for oil casing:H40,J55,K55,N80,L80,C90,T95,P110,Q125,V150Wait. Processing form of casing head:Short round thread, long round thread, trapezoidal thread, special buckle, etc. Used in oil well drilling, mainly used to support the well wall during drilling and after completion,.To ensure the normal operation of the entire well during drilling and after completion.

important position of the tubing.

The oil industry is an industry that uses a lot of tubing,.Tubing occupies a very important position in the petroleum industry:

1.The large number of oil pipes and the high cost have great potential for saving expenses and reducing costs. The consumption of oil well pipe can be calculated according to the annual drilling footage. According to the specific situation in China, generally every drill1Meters need62kg of oil well pipe, where casing48kilos,.Tubing10Kilograms.3kg drill pipe and0.5Drill Collar;

2.The mechanical and environmental behavior of oil pipelines has an important impact on the oil industry's adoption of advanced technologies and increased production and efficiency.

3.The failure loss of oil pipe is huge, and its safety, reliability and service life are very important to the oil industry.