The structure of the tubing coupling is: the top of the tubing is connected with the inner wall of the coupling in the form of tapered threads, and the top of the tubing coupling is connected with the tubing in the form of flat threads with the same thread and pitch. It has the characteristics of reducing the stress concentration at the root of the external thread of the tubing with a single taper threaded joint, is not prone to fatigue cracking, and the connection effect is obvious.

Reasonably and effectively avoid safety accidents of oil well string disconnection. Tubing Couplings, Wear-resistant Tubing Couplings, Extra Large Tubing Couplings, Wholesale Tubing Couplings, Coupling Manufacturers, L80 Tubing Couplings, Various Threaded Variable buckle Tubing Casing Couplings, Direct buckle Tubing Couplings, Nitrided tubing coupling, Q125 material tubing coupling material, thick-walled seamless steel pipe coupling material In order to prevent the tubing male and female threads (couplings) from sticking and damage during the tightening process, it is necessary to Phosphate the tubing coupling or casing coupling to avoid thread damage reasonably and effectively after disassembly.

There are also many materials that are not suitable for phosphating. BCSG casing couplings are electroplated with copper-tungsten alloy to achieve the actual effect of wear resistance.