PIPE JOINT

摘要

A pipe joint with premium threads having both metal-to-metal and polymeric seals to block fluid leakage through the joint. A polymeric seal ring is preferably carried within an annular groove in the box end. Metal sealing surfaces, each having a different inside diameter, are provided on opposite sides of the annular groove to form metal-to-metal seals with two compatible metal sealing surfaces on the exterior of the pin member. The joint is thus characterized by two metal-to-metal seals formed on opposite sides of the annular groove to trap the seal ring therebetween. The metal-to-metal seals cooperate to prevent undesired extrusion of the seal ring.