English
Casing and tubing are essential components in oil and gas well construction. Casing is a large steel pipe inserted into a drilled wellbore to stabilize the well, isolate geological formations, and prevent collapse. Tubing is a smaller pipe inside the casing, used to transport oil and gas to the surface. Together, they ensure structural integrity and efficient fluid flow in oil and gas wells. Steel grade of oil casing: H40, J55, K55, N80, L80, P110, Q125, V150, etc. Casing end processing forms: STC, LTC,BTC, special buckle, etc.
Thread processing requires the use of special thread processing equipment, such as thread lathes or thread milling machines, to ensure the connection and sealing performance of tubing and other equipment
Heat treatment can improve the hardness and corrosion resistance of steel, and surface treatment can enhance the corrosion resistance and wear resistance of tubing. According to different requirements, different heat treatment and surface treatment processes can be selected
After the completion of all processing steps, it is necessary to carry out quality inspection on the tubing, including size inspection, appearance inspection, performance testing, etc., to ensure that the tubing meets the relevant standards and customer requirements. Tubing that has passed the quality inspection needs to be packaged to facilitate transportation and storage
Special oil pipe is a key tool used in oil and gas exploitation, mainly used in oil and gas drilling and oil and gas transmission. The utility model includes oil drilling pipe, oil casing and oil pumping pipe. Oil drill pipe is mainly used to connect the drill collar to the drill bit and transfer drilling power. Oil casing is mainly used to support the well wall during drilling and after well completion, so as to ensure the drilling process and the normal operation of the whole well after well completion. Suction tubing mainly carries oil and gas from the bottom of the well to the surface. Due to different geological conditions, the underground stress state is complicated, tensile, compressive, bending and torsional stress act on the pipe body, which puts forward higher requirements on the quality of the casing itself. Once the casing itself is damaged for some reason, the entire well may be reduced or even scrapped.
Oil casing is mainly used to support the well wall during drilling and after well completion, so as to ensure the drilling process and the normal operation of the whole well after well completion. Casing after the well to use cement, it is different from tubing, drill pipe, can not be reused, belongs to a one-time consumption of materials. Therefore, casing consumption accounts for more than 70% of all oil well pipes. The classification of oil casing can be divided into pipe, surface casing, technical casing and oil layer casing according to the use.
Tubing is a pipe that goes into the casing of an oil well during normal production. In the flowing well, oil flow flows into the surface through the tubing and enters the gathering and transportation process. In the mechanical production well, the combination of tubing, sucker rod and deep well pump (that is, three pumping equipment) pumps the oil to the surface and enters the gathering and transportation process.
