Threaded joint sealed to [ultra high] internal and external pressures

摘要

The present invention relates to a threaded joint for joining tubes used especially in the field of OCTG (Oil Country Tubular Goods), such as pipes in gas or oil production and/or casings when drilling wells comprising a pin (1) and a coupling (2) having an end surface (21) not facing against any surface of the pin when the joint is made-up, the pin (1) has a first sealing surface (11) on its extremity and a second sealing surface (19) on the other side of the threaded portion . The coupling (2) has a first sealing surface (12) and an abutment shoulder (10) abutting against the first pin end surface (9) on a first side of the female thread and a second box sealing surface (18) on the other side of the thread.