Chain-and-float system eases underwater pipelaying

Journal Article · Sat Apr 01 04:00:00 EST 1978 · Ocean Ind.; (United States)

OSTI ID:5130182

In a new underwater pipelaying method developed by C. G. Doris, long sections of pipe can be towed a few meters above the seabed with control of immersion by means of floats and chains. The system allows the pipe to be prefabricated onshore, including concrete coating of the pipe, welding, inspection of welds and testing of line sections, coating of joints, shifting of sections to be installed on the launching track, and welding of line sections to already pulled sections. To avoid buckling, a retaining force is exerted on the shore end. Although the method has only been used for short connections, the installation of very long sections of lines (over 10 km) in great water depths is being considered.

• OSTI ID: 5130182
• Journal Information: Ocean Ind.; (United States), Journal Name: Ocean Ind.; (United States) Vol. 13:4; ISSN OCIDA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
022000* -- Petroleum-- Transport
Handling
& Storage
42 ENGINEERING
420205 -- Engineering-- Transport & Storage Facilities-- (1980-)
423000 -- Engineering-- Marine Engineering-- (1980-)
INSTALLATION
PIPELINES
TECHNOLOGY UTILIZATION
UNDERWATER OPERATIONS