US Patent 7434848 Threaded tubular connection having interlocking tubular end structures

A tubular connection having a first joint having outer threads and an inner bore, and a second joint having outer threads and an inner bore. The tubular connection further includes an outer nut having inner threads that cooperate with the outer threads of the first joint and the second joint. The tubular connection further includes an inner sleeve positioned within the first inner bore and the second inner bore. In one embodiment, the first inner bore contains a first groove having first seal disposed therein and the second inner bore contains a second groove having second seal disposed therein, wherein the first and second seal prevents a pressure from exiting the first and second inner bore.