ILO Home
Go to the home page
Site map | Contact us Franšais | Espa˝ol

CISDOC database

Document ID (ISN)58290
CIS number 92-1358
Year 1991
Convention or series no. Offshore Technology Report OTO 90 025
Author(s)
Health and Safety Executive
Title Risk analysis of mooring failure. Phase 2: Consequences of MODU mooring failure in the northern North Sea
Bibliographic information Noble Denton Marine Services Ltd., Moray House, 145 Crown Street, Aberdeen AB1 2HR, United Kingdom, Mar. 1991. 125p. Illus. 25 ref.
Abstract This report describes the results of a risk study in which event tree analysis was used to investigate the consequences of mooring failure for Mobile Offshore Drilling Units (MODUs). The following possible consequences of mooring failure were studied: collision with an existing installation; blowout; pipeline fracture; tripping capsize; stranding or grounding. It was concluded that the greatest risk associated with station keeping system failure is that due to the possibility of a collision with another installation. The greatest risk associated with single line failure is that due to possibility of damage to the marine riser of B.O.P. leading to an uncontrollable escape of hydrocarbon.
Descriptors (primary) United Kingdom; offshore oil extraction; safety analysis
Descriptors (secondary) hazard evaluation; prediction; mathematical models; material failure
Document type E - Books, reports, proceedings
Country / State or ProvinceUnited Kingdom
Subject(s) Mines and quarries
Broad subject area(s) Mechanical hazards, transport
Browse category(ies) Petroleum and natural gas industry