Rotary transfer subsystems and tensioning assemblies for a vessel. [Transfer from marine riser to rotatable interface to shift]

Patent · Tue Mar 13 00:00:00 EST 1984

OSTI ID:6640507

Gentry, L L; Moss, H H; Panicker, N N; Wada, W T

A rotary transfer subsystem is described for transferring production fluids, electrical power, hydraulic power, and control signals across a rotating interface between an offshore vessel and a flowline bundle of service hoses and high-pressure hoses which are connected to a deepwater production riser system. Tensioning devices are also described for maintaining a selected tension on terminal hoses between the interface and the vessel while the vessel weathervanes during maintenance of position in a watch circle above the riser system. The subsystem and the tensioning devices are mounted on the vessel which is equipped with a powered turret within a circular moonpool and is capable of performing most subsea service functions on the riser system without major equipment support. The subsystem and the tensioning devices, in combination, comprise a column assembly which is attached to the turret and supports horizontal loops of terminal hoses; a multi-passage swivel for accommodating a portion of the terminal hoses containing gas; a tower for selectively tensioning these hoses and for connecting them to production piping; a traveling sheave and drive mechanism which supports horizontal loops of the remaining hoses while maintaining tension on them and adjusting their lengths, between connections to storage facilities in the vessel and to the column assembly, while the column assembly remains rotatably stationary with respect to the flowline bundle during weathervaning of the vessel through at least 270/sup 0/; and hose support trays for supporting horizontal spans of all hoses between the tower and the column and between the column and the traveling sheave.

• Assignee: Mobil Oil Corporation
• Patent Number(s): US 4436048
• OSTI ID: 6640507
• Resource Relation: Patent File Date: Filed date 22 Jun 1982; Other Information: PAT-APPL-391070
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
DATA TRANSMISSION
NATURAL GAS
PETROLEUM
POWER TRANSMISSION
DEEP WATER OIL TERMINALS
DESIGN
HOSES
MARINE RISERS
OFFSHORE PLATFORMS
ROTATION
SHIPS
SIGNALS
STORAGE FACILITIES
COMMUNICATIONS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
MOTION
PIPES
TERMINAL FACILITIES
022000* - Petroleum- Transport
Handling
& Storage
032000 - Natural Gas- Transport
Handling
& Storage