| 摘要 |
<p>A sealing assembly having application for sealing between wellhead housing and a casing suspended therein and including a base ring with an upper surface having inner and outer shoulders and an annular recess therebetween, a first energizing ring with a shoulder facing the base ring inner shoulder, a projection to extend into the annular recess and upper lugs with tapered upper surfaces; a second energizing ring surrounding the first ring projection with slots to receive the first ring lugs, a lower surface facing the base ring outer shoulder and upper tapered surfaces; an inner seal ring between the base ring inner shoulder and the first ring shoulder; an outer seal ring between the base ring outer shoulder and the second ring shoulders and means for engaging the tapered surfaces at the first and second rings to energize said seals into sealing position.</p> |
