Lengthened tubing coupling refers to couplings whose total length is greater than the standard length. The specific length value can be changed according to customer requirements. The other data is the same as the standard coupling!
The oil field saves the cost of oil production. The oil pipe factory repairs and reuses the oil pipe. After testing, the oil pipe with no damage to the external threads is cleaned on the inside and outside surfaces.
Our company supplies tubing couplings and threaded caps in large quantities to major oil fields all year round.
Coupling inspection. The coupling surface must not be severely scored. Pay attention to the end surface damage caused by the impact of the elevator. Attention should be paid to the number of exposed threads on the original thread, which cannot be used beyond the standard, and should generally be less than 2.5. Excessive torque on the buckle is one of the main causes of coupling damage. Visual inspection of special threads with fingers is feasible. Minor nicks should be repaired, and longitudinal nicks will affect sealing performance. When the maximum torque has been applied and there is excessive residual buckle, check the ovality of the coupling. The outer caliper is used to measure in several directions, and the ovality of the pipe body is considered to be qualified if it passes the inner diameter gauge. When the grade of steel is not clear, you should look for the stamp on the coupling.