Threaded joint sealed to internal and external pressures
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United States of America Patent
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Nov 24, 2020
Grant Date -
Jun 9, 2011
app pub date -
Nov 24, 2010
filing date -
Nov 24, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
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 can include a pin and a coupling, or box, having an end surface not facing against any surface of the pin when the joint is made-up. Following make-up of the joint, first sealing surfaces of the pin and box mate to form an internal metal-to-metal seal, and second sealing surfaces of the pin and box mate to form an external metal-to-metal seal, where the internal and external seals are defined by contact between one toroidal surface and one frusto-conical surface.
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