Patent ID: 6283477
Filing Date: 2001-09-04
Classification: E21B

Abstract:
A method of manufacturing an annular chamber in a tubular body joint having internal and external metal-to-metal interference seals, said chamber capable of being a part of a pressurized hydraulic system, comprising:selecting a reference dimension on a pin member;selecting the same reference dimension on a mating box member;machining internal and external faces in said pin positioned with respect to said pin reference dimension;machining internal and external sealing faces in said box positioned with respect to said box reference dimension;configuring said pin to form a part of an annular chamber when fitted to said box;configuring said box to complete the joint and said annular chamber in the wall of the joint created by joining said pin and said box;providing access into said annular chamber through said pin and said box; andpositioning said internal and external sealing faces on said box so that they are opposed to said internal and external sealing faces on said pin and in an interference fit when the joint is assembled to effectively seal the annular chamber formed, both internally and externally, to the joint so that it can function as part of a hydraulic circuit.