Imodco Inc. bow mooring unit offers new option

Journal Article · Thu Mar 01 04:00:00 EST 1979 · Offshore; (United States)

OSTI ID:5310678

Lyles, C; Lorentz, J; Hartley, G

The basic system is comprised of a gravity-tight mooring base, a single extra-high-strength chain, two universal joints, and a spar-type mooring buoy. A gravity-type mooring base was selected because of the soil characteristics in the platform location. The mooring base is a square shell divided into four compartments, which are filled with ballast. Two identical universal joints are incorporated into the system, one at the base and one at the buoy and attached to each end of the riser chain. This arrangement eliminates wear in the single anchor chain. The chain connecting the buoy on the surface to the base on the seabed is a high-strength, U-3 stud link chain of 62 mm dia and capable of withstanding loads up to 300 tons before failure. The mooring buoy is a 70 ft long, 3 ft dia, all-steel, watertight cylinder surrounded by a cylindrical buoyancy tank located at the lower end of the spar. This buoy configuration provides about 65,000 lb of the net buoyancy. An 11 in. circumference, 100 ft long floating polypropylene mooring hawser is attached by shackles to a T-section forging bolted to the top of the buoy.

• Research Organization: Imodco, Inc., Los Angeles, CA
• OSTI ID: 5310678
• Journal Information: Offshore; (United States), Journal Name: Offshore; (United States) Vol. 39:3; ISSN OFSHA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
BUOYS
DESIGN
MOORINGS
OFFSHORE PLATFORMS
SPECIFICATIONS