The
casings pipe used in drilling, the joints they use, are chosen to be a trapezoidal thread, plus the concept of a torsion-resistant shoulder, so that it can transfer a very large turn when in use. Moreover, it is possible to generate a larger torque than a normal
ssaw steel pipe, which ensures a very good seal and can meet the needs and skill requirements of the casing used in the drilling surface.
Now, the international oil industry is constantly developing and perfecting, and the new skills of this casing are constantly being implemented. This skill enables the drilling and the casing to be drilled during the drilling operation. These two different processes are combined into one, so that the drilling of the drill pipe can be saved during drilling. The cost of use can also greatly shorten the production cycle of the well construction, simplify the production structure of all the drilling rigs, reduce the occurrence of the incident, and greatly reduce the cost. Therefore, it has also been expected by drilling in major oil fields.
China's oil industry, when it started using this new drilling skill, paid great attention to the dynamics of this skill application, and its implementation and application in the country is also very active. It has also been used in many large oil wells in China. It has also independently planned and produced several types of drill heads for oil casings for drilling and began to use them.
