The casing pipe is used to support the oil and gas well walls to ensure the normal operation of the entire well after the drilling process is completed. Each well is based on different depths of drilling and geology, using several layers of casing. After the casing is down, the cement is to be cemented. It is different from the oil pipe and the drill pipe and cannot be reused. It is a disposable material. Therefore, the consumption of casing accounts for more than 70% of all oil well pipes.Casing can be divided into: conduit, surface casing, technical casing and oil casing.
The oil special pipe is mainly used for drilling oil and gas wells and conveying oil and gas. It includes oil drill pipes, oil casings, and oil pipes. Oil drill pipes are mainly used to connect drill collars and drill bits and transmit drilling power. The oil casing is mainly used 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 oil pipe mainly transports the oil and gas at the bottom of the oil well to the ground.
Oil casing pipe is the lifeline for maintaining oil well operations. Due to different geological conditions, the state of the downhole is complicated, and the combined action of tension, compression, bending and torsion stress acts on the pipe body, which puts high requirements on the quality of the casing itself. Once the casing itself is damaged for some reason, it may result in a reduction in production and even scrapping of the entire well.
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.
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