1979•Proc., Annu. Offshore Technol. Conf.; (United States)Requires access

LOOP (Louisiana Offshore Oil Port) deepwater port design and construction of the single anchor leg mooring (SALM) tanker terminals

R.H. Gruy, William L. Kiely, L.A. Maresh, K.I. Pedersen

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Abstract

Three SALM's for the LOOP terminal will be located 18 mi south of Grand Isle, La., in approx. 110 ft of water for the safe unloading of tankers up to 700,000 dwt. Unique features are designed into these SALM's to ensure that the first U.S. deepwater port is environmentally secure, provides maximum operational safety, and requires minimum maintenance. Design factors discussed include model tests at the Netherlands Ship Model Basin in 1974 which indicate advantage for the SALM vs. the CALM (Catenary Anchor Leg Mooring); SALM design; selection of a dual instead of a single hawser system; consideration of fatigue; a description of the major SALM components (mooring base and pilings, fluid swivel assembly, mooring buoy, anchor leg assembly, hose system) remote valve control systems; a load monitoring system providing hawser forces to the control platform operator and to the tanker; and classification by the American Bureau of Shipping.

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Three SALM's for the LOOP terminal will be located 18 mi south of Grand Isle, La., in approx. 110 ft of water for the safe unloading of tankers up to 700,000 dwt. Unique features are designed into these SALM's to ensure that the first U.S. deepwater port is environmentally secure, provides maximum operational safety, and requires minimum maintenance. Design factors discussed include model tests at the Netherlands Ship Model Basin in 1974 which indicate advantage for the SALM vs. the CALM (Catenary Anchor Leg Mooring); SALM design; selection of a dual instead of a single hawser system; consideration of fatigue; a description of the major SALM components (mooring base and pilings, fluid swivel assembly, mooring buoy, anchor leg assembly, hose system) remote valve control systems; a load monitoring system providing hawser forces to the control platform operator and to the tanker; and classification by the American Bureau of Shipping.

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Available abstract

Three SALM's for the LOOP terminal will be located 18 mi south of Grand Isle, La., in approx. 110 ft of water for the safe unloading of tankers up to 700,000 dwt. Unique features are designed into these SALM's to ensure that the first U.S. deepwater port is environmentally secure, provides maximum operational safety, and requires minimum maintenance. Design factors discussed include model tests at the Netherlands Ship Model Basin in 1974 which indicate advantage for the SALM vs. the CALM (Catenary Anchor Leg Mooring); SALM design; selection of a dual instead of a single hawser system; consideration of fatigue; a description of the major SALM components (mooring base and pilings, fluid swivel assembly, mooring buoy, anchor leg assembly, hose system) remote valve control systems; a load monitoring system providing hawser forces to the control platform operator and to the tanker; and classification by the American Bureau of Shipping.

Key concepts: Mooring, Marine engineering, Catenary, Engineering, Port (circuit theory), Submarine pipeline, Buoy, Deep water

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