Sequential retrieval mechanism for bi-directional wellhead annulus packoff
AssigneeBaker Hughes Oilfield Operations LLC
InventorsSamuel Cheng, Prashant Patel, Xichang Zhang
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Abstract
A wellhead annulus packoff and an associated method is disclosed. A retainer lock mechanism of the wellhead annulus packoff is to sit at least partly within a first indentation of a hanger. The retainer lock mechanism includes a bottom surface and a side surface so that the bottom surface is to be associated with a lower energizing ring and the side surface is to be engaged in an energized state with a first side of the seal element. A second side of the seal element is to abut with a surface of a housing and a slot of the seal element is to abut with the lower energizing ring in the energized state of the wellhead annulus packoff.
Claims20
A method for a wellhead annulus packoff, comprising:
- providing a retainer lock mechanism for the wellhead annulus packoff, the retainer lock mechanism to sit at least partly within an indentation of a hanger;
- enabling the retainer lock mechanism to be associated with a lifting surface of a lower energizing ring;
- and
- enabling a seal element to be associated with the retainer lock mechanism, a first side of the seal element to hold the retainer lock mechanism in position, a second side of the seal element comprising at least one leg to abut within at least one recess of a surface of a housing, and a slot of the seal element to abut with the lower energizing ring in an energized state of the wellhead annulus packoff.
A wellhead annulus packoff, comprising:
- a retainer lock mechanism to sit at least partly within an indentation of a hanger and to comprise a bottom surface and a side surface, the bottom surface of the retainer lock mechanism to be associated with a lower energizing ring and the side surface of the retainer lock mechanism to be engaged with a first side of a seal element in an energized state of the wellhead annulus packoff, wherein a second side of the seal element comprises at least one leg to abut within at least one recess of a surface of a housing and wherein a slot of the seal element is to abut with the lower energizing ring in the energized state of the wellhead annulus packoff.
Dependencies are inferred from the claim text.