E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/49
E21B 33/04 (2006.01) E21B 33/043 (2006.01) E21B 33/00 (2006.01)
Patent
CA 1317541
Abstract The improved structure of the present invention includes a hanger having a landing seat for engaging the landing seat within a wellhead housing, a hanger holddown ring, an external sealing surface spaced from the internal sealing surface of the housing to form the annulus to be sealed, a seal assembly including a seal body having external metal seal legs diverging outward but having a free diameter less than the diameter of the housing internal sealing surface and internal metal seal legs converging inwardly and having a free diameter smaller than the diameter of the hanger external sealing surface, a lower body movably connected to the seal body and having an upstanding rim engaging the lower outer seal leg, an upper body movably connected to the seal body, a loading ring surrounding the upper portion of the seal body and engaging the upper outer seal leg, means for securing said seal assembly to said hanger after said seal assembly has been set in loaded sealed position and means for retaining said loading ring against the upper outer seal leg to latch said seal assembly in loaded sealed position. In the modified form the seal body includes an upper outer seal lag extending upwardly and outward and having a free diameter less than the internal sealing diameter of the housing and a lower outer seal leg extending upwardly and having a free diameter larger than the internal sealing diameter of the housing and this form does not have a lower body or upper rim supporting the lower outer seal leg. It does have the means for loading the upper outer seal leg and the latch to retain the seal assembly in sealing position.
584155
Mcever James P.
Theiss David H.
Cooper Cameron Corporation
Smart & Biggar
LandOfFree
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