| 摘要 |
A threaded joint includes a first seal ring having a tapered shape in a cross section on an axial plane, this ring having an L-shaped metal reinforcement ring embedded in it. The threaded joint can also include a second seal ring positioned more internal to the first seal ring and located in a housing between the end of a threaded section and the nose of the box. The second seal ring has a first base, a second base axially opposite to the first base, and protruding annular ribs either on the external surface or on an internal surface. |
