Marine wellhead structure

Patent · Tue Mar 24 04:00:00 EST 1987

OSTI ID:6670771

Crotwell, G W

A subsea wellhead is described comprising: a conductor casing positioned in the well bore and having an internal upwardly facing shoulder, and an internal latching groove above the shoulder; a housing having an external downwardly facing shoulder supported on the casing shoulder, a first external groove above the housing shoulder with a lower surface tapering slightly upwardly and outwardly, the first housing groove opening to the latching groove, a second external groove spaced above the first groove; a split latching and loading ring within the first housing groove and having an internal surface tapering upwardly and outwardly; a cam ring having an external surface tapering upwardly and outwardly to mate with the internal tapered surface of the latching and loading ring; actuating means coacting with the cam ring to move the cam ring behind the latching and loading ring to ensure transfer of loads from the upper portion to the housing through the latching and loading ring into the conductor casing; and lock means carried by the cam ring to engage in the second external housing groove to latch the cam in engagement with the internal latching groove in the conductor casing.

• Assignee: Cameron Iron Works, Inc., Houston, TX
• Patent Number(s): US 4651830
• OSTI ID: 6670771
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
423000 -- Engineering-- Marine Engineering-- (1980-)
DESIGN
DRILLING
FASTENERS
NATURAL GAS WELLS
OFFSHORE DRILLING
OIL WELLS
OPERATION
POSITIONING
RINGS
UNDERWATER OPERATIONS
WELL CASINGS
WELLHEADS
WELLS