Economic pipelaying via guide-roping

Journal Article · Sat Jul 01 04:00:00 EDT 1978 · Offshore; (United States)

OSTI ID:6448266

Chevaux, G; Doris, C G

The underwater pipeline laying method developed by C. G. Doris consists of towing long sections of pipe a few meters above the seabed. Buoyant units and chains fitted on the pipe restrict the forces on the pipe during transportation. Required surface facilities are cheaper than the classical pipelaying barges. It is possible to install pipe sections over 10 km long in very deep water. A recent improvement of the method allows the length of pipe to be towed and reduces the amount of drift induced by currents. The weight of the raised chains balances the amount of the thrust load of the buoyant units and the weight of the pipe, which is towed empty. On flat ground, the chains maintain the pipe at a constant level above the seabed. This method is sometimes called the guide-rope method in reference to the guide rope of the aerostats. On uneven ground, the effect of the chains and buoyant units are similar to that of an elastic mattress placed between the pipe and the seabed.

• Research Organization: C. G. Doris
• OSTI ID: 6448266
• Journal Information: Offshore; (United States), Journal Name: Offshore; (United States) Vol. 38:8; ISSN OFSHA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420205 -- Engineering-- Transport & Storage Facilities-- (1980-)
423000* -- Engineering-- Marine Engineering-- (1980-)
COST
INSTALLATION
LEVELS
MARITIME TRANSPORT
PIPELINES
POSITIONING
TRANSPORT
UNDERWATER