| 主权项 |
1. A wellhead assembly comprising:
an outer tubular wellhead member having an axis; an inner tubular wellhead member, the inner tubular wellhead member being operable to land within the outer tubular wellhead member, defining a seal pocket between them; a wellhead member sealing surface on at least one of the wellhead members; wickers formed in the wellhead member sealing surface, the wickers comprising a plurality of circumferentially extending, parallel ridges; an annular sealing ring disposed within the seal pocket, the annular sealing ring having a sealing ring surface operable to be urged against the wickers in the wellhead member sealing surface; the sealing ring surface having a plurality of circumferentially spaced apart sealing ring grooves extending from a first end toward a second end of the sealing ring surface, one of the ends of the sealing ring surface being above the other of the ends of the sealing ring surface, each of the sealing ring grooves having a back wall recessed from the sealing ring surface and having a groove radial depth that is less than a sealing ring radial thickness measured at the sealing ring surface; wherein the sealing ring grooves provide flow paths for fouling material trapped in the wickers as the sealing ring surface is urged against the wickers; and when the sealing ring is fully set, the wickers will have deformed the sealing ring grooves and closed off the flow paths. |
