Patent ID: 8376057
Filing Date: 2013-02-19
Classification: E21B,Y10T

Abstract:
1. A wellhead assembly comprising: a wellhead housing comprising a throughbore having a recessed sealing area, the recessed sealing area comprising a single recess; a tubing hanger positioned in the throughbore; a seal positioned between the wellhead housing and the tubing hanger, the seal being positioned so as to form a gap between the seal and the wellhead housing, wherein the seal is an annular seal capable of sealing an annulus formed in the throughbore between a perimeter of the tubing hanger and the wellhead housing, wherein a length of the seal is shorter than a length of the single recess and wherein the seal comprises a first leg and a second leg, the first leg contacting the perimeter of the tubing hanger and the second leg being proximal to the wellhead housing, the gap being formed between the wellhead housing and the second leg; and a seal energizer capable of moving relative to the seal in a manner that forces the seal against the wellhead housing to bridge the gap.