Subsea riser for multiple bore wells

Patent · Tue Sep 13 04:00:00 EDT 1988

OSTI ID:6544705

Wilkins, R L

This patent describes a subsea riser for connecting to a multiple bore subsea wellhead comprising a tubular housing having an upper end and a lower end, an upper tubular member having an upper end and a lower end, means for rotationally mounting the lower end of the upper tubular member within the upper end of the tubular housing, a lower housing member having multiple bores therethrough spaced around the center of the lower member, and means securing the lower housing member to the lower end of the tubular housing, the upper tubular member having an offset portion; within the tubular housing and a skirt within the tubular housing, surrounding the offset portion and having its lower end in sealing engagement with the lower housing member, the offset portion of the upper tubular member extending within the housing and having its lower ends at a diameter to register with the bores of the lower member as the upper tubular member is rotated within the housing.

• Assignee: Cameron Iron Works USA, Inc., Houston, TX
• Patent Number(s): US 4770247
• OSTI ID: 6544705
• 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
FABRICATION
FASTENERS
INSTALLATION
JOINING
MARINE RISERS
NATURAL GAS WELLS
OFFSHORE PLATFORMS
OIL WELLS
PIPES
WELLHEADS
WELLS