Patent ID: 6494495
Filing Date: 2002-12-17
Classification: E21B,F16B,F16L

Abstract:
A locked threaded coupling comprisinga threaded box and a threaded pin providing a flow path extending in an axial direction therethrough and having shoulders abutting in a made-up position of the box and pin and providing a limit of threading movement; the threaded pin having a radially outwardly opening arcuate groove spaced from the threads; the box having at least one passage tangential to the groove in the made-up position of the threads providing a first outer section on a first side of the box, an intermediate section intersecting the groove and a second outer section on a side of the box adjacent to the first side of the box; and a locking pin extending through the first and second outer sections of the passage and through the intermediate section for preventing relative axial movement of the box and threaded pin; the groove and the passage being of the same length in the axial direction and closely receiving the locking pin; the groove, the passage and the locking pin preventing relative axial movement of the box and threaded pin in a multiplicity of rotational positions of the threaded pin relative to the box.