TUBULAR CONNECTION HAVING A PARALLEL CHEVRON THREAD

摘要

A thread form is shown for a tubular connection of the type having a pin member adapted to be made up with a box member to form a pipe joint. The pin member has pin threads with thread crests and thread roots which are adapted to be made up with a mating box member having a complimentary thread structure. The pin thread crests are formed between a stab flank and a load flank of the pin thread. A pin thread has a chevron-shaped load flank for engaging a mating chevron-shaped load flank of the complimentary box member to provide a chevron type interfit between the load bearing flanks. The load flanks of the pin member includes an outer wall portion with a positive slope which provides additional clearance between the complimentary threads on the pin and box members during disassembly to prevent inadvertent hanging-up of the threads.