Use of oil casing

　　The ASTM steel pipe can be divided into different steel grades according to the strength of the steel itself, that is, J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. The steel grade is different from well condition and well depth. The corrosion resistance of the casing itself is also required under corrosive environment. API K55 Seamless Steel Petroleum Oil Casing also requires the casing to resist collapse under complex geological conditions. The tubing mainly transfers the oil and gas at the bottom of the oil well to the ground.

　　API oil casing is mainly used for drilling oil and gas well and transporting oil and gas. It includes oil drill pipe, oil casing and oil suction pipe.

　　The API K55 Seamless Steel Petroleum Oil Casing is mainly used to connect collar and drill bit and transmit drilling power. The oil casing is mainly used to support the wellbore during drilling and completion, so as to ensure the normal operation of the whole well after completion of the drilling process.

　　Oil casing is the lifeline for maintaining the operation of oil wells. Because of the different geological conditions, the stress state of the underground is complex. The combined action of tension, pressure, bending and torsion stresses on the tube body, which puts forward higher requirements for the quality of the casing itself. Once the casing itself is damaged for some reason, the whole well can be reduced or even scrapped.