Patent ID: 8186722

Claim:
A high torque threaded joint comprising a box member having female threads and a pin member having male threads configured to mate with the threads of the box member, wherein the box member and the pin member have a trapezoidal thread profile and thread pitch adapted for a simultaneous mating contact between load flanks and stabbing flanks and a low value of radial interference, wherein a load flank angle and a stabbing flank angle, as measured from a plane perpendicular to the longitudinal axis of the joint, are each of a low, positive value and range between approximately 3° to approximately 15°, wherein an included angle between the load flank surface and the stabbing flank surface of a thread is positive and is less than 20°, and wherein further at least one of the pin and the box threads are coated with a thin layer of a dope-free solid material, that comprises a dry lubricant.