wellhead seal assembly, wellhead assembly and method of seating a seal between a sealing surface of a hanger and a sealing surface of a wellhead

摘要

It is a wellhead housing that has a hole with an inner sealing surface. a hanger with an outer sealing surface that lands in the hole. indentations are formed on at least one of the sealing surfaces. a metal sealing ring rests between the sealing surfaces, the sealing ring having inner and outer annular legs separated by an annular slot. An energy ring has inner and outer diameter surfaces that slide against the inner and outer sealing ring legs when the power ring is moved down into the slot to radially deform the inner and outer legs in sealing engagement with the wellhead housing and suspender. the energy ring has an inner diameter relief and an outer diameter relief, each of which is a partially circumferential groove extending upwardly from a lower rim. reliefs define a bridge of narrower radial thickness at the lower rim.