Marine surface facility work station for subsea equipment handling

Patent · Tue May 15 00:00:00 EDT 1984

OSTI ID:6515726

Gentry, L L; Moss, H H; Panicker, N N

An offshore process vessel is described for connecting service and production hoses to a deepwater production riser system and for performing subsea maintenance thereon without major equipment support. The vessel has a pair of longitudinally aligned moonpools, a derrick above the forward moonpool, a rotary powered turret within the aft moonpool, and tension-maintaining assemblies for terminal hoses in combination with a rotary fluid transfer system for transferring production fluids, electrical power, hydraulic power, and control signals across a rotating interface between the vessel and a flowline bundle of the service and production hoses. The turret supports a coaxially disposed and selectively ejectable plug through which the service and production hoses pass. These hoses are joined together in a linear array along the length of the flowline bundle which hangs as a catenary from the plug while being attached to the riser system. Above the plug, the terminal hoses and the service and production hoses are connected by rigid piping. The tension maintaining assemblies keep the terminal hoses at constant length as the vessel weathervanes on station through at least 270/sup 0/ above the riser system and around the turret. The vessel additionally has a plurality of hose reels and wire winches for assembling the service and production hoses into the flowline bundle as a sling between the moonpools and below the vessel. The winches also enable the flowline bundle to be disconnected at its inlet end from the service moonpool and to be connected to the riser system.

• Assignee: Mobil Oil Corporation
• Patent Number(s): US 4448568
• OSTI ID: 6515726
• Resource Relation: Patent File Date: Filed date 22 Jun 1982; Other Information: PAT-APPL-391038
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
MARINE RISERS
INSTALLATION
MATERIALS HANDLING EQUIPMENT
DESIGN
OFFSHORE PLATFORMS
MAINTENANCE
FLEXIBILITY
FLUID WITHDRAWAL
HYDRAULIC CONTROL DEVICES
NATURAL GAS WELLS
OIL WELLS
UNDERWATER OPERATIONS
CONTROL EQUIPMENT
EQUIPMENT
MECHANICAL PROPERTIES
PIPES
TENSILE PROPERTIES
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing