Patent ID: 6609735
Filing Date: 2003-08-26
Classification: E21B,F16L

Abstract:
A coupling for a threaded and coupled connector used to secure the ends of tubular pipe sections together comprising:tubular coupling body having axially extending, internally threaded areas at each end of said coupling body, tapering external surfaces formed on said coupling body, each of said surfaces extending from a central portion of said coupling body toward the end of said body and reducing in diameter in an axial direction from said central portion toward the end of said body, said tapering external surfaces extending axially along said coupling body for functionally relating a taper length to the minimum outside diameter of the pipe section to which the coupling is to connect, wherein said taper extends over internal threads of said coupling that are radially disengaged from the external surface of the pipe section to which the coupling is to connect when the coupling is fully engaged with the pipe section, an internally formed annular seating area in said coupling body intermediate said internally threaded areas for engagement with the end of a pipe section, and wherein a coupling face is formed at each end of said coupling and the thickness of said coupling face is less than the thickness of a thread length and coupling thickness at a last fully formed thread in said coupling adjacent said coupling end.