The function of oil pipe couplings is to connect oil pipes. Oil pipe couplings can solve the problem of fatigue and fracture caused by stress concentration in existing couplings. The structure of the oil pipe coupling is mainly that the end of the oil pipe and the inner wall of the coupling body are connected based on the conical thread method. For the oil pipe coupling, the end of the coupling body and the oil pipe are connected based on the same thread and the same pitch flat thread method. The use of oil pipe couplings has the advantage of alleviating the stress concentration at the root of the external thread of a single conical thread connecting oil pipe. The use of oil pipe couplings is not prone to fatigue fracture, and the connection effect is very good.

The design of oil pipe couplings is mainly from the perspective of changing the structure of the coupling. The main focus is to develop corrosion-resistant oil pipe couplings, which play a protective role in the coupling of the oil pipe and the threaded part of the connecting pipe of the coupling. The use of tubing couplings can achieve a strong sealing effect on the connection between the two ends of the tubing coupling, as well as the screw connection between the tubing and threads. Additionally, anti-corrosion treatment is applied to the inside and outside of the coupling. The use of oil pipe couplings has strong operability and practicality on site. After the coupling is removed after use, the threads of the coupling are very complete and there will be no obvious corrosion phenomenon, completely solving the problem of petroleum operation and construction. In the corrosion application of repairing oil pipes and oil pipe couplings, it is a long-term and very difficult problem to solve, and its technical content is relatively high, And the value of use is also very high, which can extend the service life of oil pipes and tubing couplings, thereby reducing production costs and significantly improving the recovery efficiency of oil and gas wells.