Subsea wellhead seal assembly

Patent · Tue Jul 26 04:00:00 EDT 1988

OSTI ID:6867475

Gullion, S D

An annular subsea wellhead seal assembly is described for sealing against the walls in a subsea wellhead annulus above a landing seat at the lower end of the annulus comprising: an annular body having an outwardly and downwardly flaring outer skirt and an inwardly and downwardly flaring inner skirt extending from it slower surface, a landing ring having lower landing surface for landing on a landing seat at the lower end of the subsea wellhead annulus in which the assembly is to seal, and an upper flat reaction surface which is positioned immediately under and engagable with the lower ends of the skirts; and means connecting the body and the landing ring for relative movement toward each other; downward movement of the body with respect to the landing ring spreading the skirts outward and inward, respectively, into a substantially horizontal digging engagement set position with the walls of the annulus to be sealed.

• Assignee: Cameron Iron Works USA, Inc., Houston, TX
• Patent Number(s): US 4759409
• OSTI ID: 6867475
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
423000* -- Engineering-- Marine Engineering-- (1980-)
DESIGN
DRILLING
EQUIPMENT
HORIZONTAL INTEGRATION
SEALS
UNDERWATER OPERATIONS
WELL DRILLING
WELLHEADS