Wellhead with eccentric casing seal ring

Patent · Tue Sep 20 04:00:00 EDT 1988

OSTI ID:6688180

Bridges, C D

This patent describes an apparatus for forming a metal seal between an outer wall of an inner tubular member and a bore of an outer tubular member, comprising in combination: a metal seal ring having an inner wall adapted to be positioned around the inner tubular member, and a conical outer wall, the inner and outer walls each having a centerline, the centerline of the inner wall being radially offset from the centerline of the outer wall; a metal wedge ring having a conical inner wall portion adapted to engage the outer wall of the seal ring, and an outer wall adapted to engage the bore of the outer tubular member, the inner wall portion and the outer wall of the wedge ring each having a centerline, the centerline of the inner wall portion of the wedge ring being radially offset from the centerline of the outer wall of the wedge ring, allowing one of the seal ring and wedge ring to be rotated relative to the other to selected orientations relative to the inner tubular member to accommodate eccentricity of the inner tubular member relative to the bore in the outer tubular member; and means for moving one of the wedge ring and the seal ring toward the other to force the inner wall of the seal ring into sealing contact with the inner tubular member and to force the outer wall of the wedge ring into sealing engagement with the bore of the outer tubular member.

• Assignee: Vetco Gray, Inc., Houston, TX
• Patent Number(s): US 4771832
• OSTI ID: 6688180
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
DRILL PIPES
DRILLING EQUIPMENT
ELEMENTS
EQUIPMENT
METALS
NATURAL GAS WELLS
OIL WELLS
PIPES
SEALS
WELL CASINGS
WELL COMPLETION
WELLHEADS
WELLS