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Simple introduction of tubing coupling

Tubing coupling is a kind of oil field drilling tool, which is mainly used in the connection of tubing. The tubing coupling mainly solves the problem of fatigue fracture caused by the stress concentration of the existing joint.
The tubing coupling structure is: the end of the oil pipe and the inner wall of the conical collar screw connection, the connection of the hoop body end and the tubing with thread pitch with flat thread. It has the characteristics of relieving the stress concentration of the outer screw thread of the oil pipe with single taper thread connection, which is not easy to produce fatigue fracture, and the connection effect is good. Effectively prevent the accidents of oil well pipe string break off.
The coupling is divided into the tubing coupling and the casing collar. Commonly used in steel grade J55, K55, N80, L80, P110, etc..

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