Titre du document / Document title
Recovery of an elevated jack-up with leg bracing member damage
Auteur(s) / Author(s)
STONOR R. W. P. (1) ;
HOYLE M. J. R. (1) ;
NELSON K. (2) ;
SMITH N. P. (2) ;
HUNT R. J. (3) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) Noble Denton Europe Ltd., Noble House, 39 Tabernacle Street, London EC2A 4AA, ROYAUME-UNI
(2) GlobalSantaFe Corporation, 15375 Memorial Drive, Houston Tx 77079, ETATS-UNIS
(3) Shell UK Exploration and Production, 1 Altens Farm Road, Nigg, Aberdeen AB12 3FY, ROYAUME-UNI
Résumé / Abstract
During the winter of 2001-2002, while drilling over the Leman Delta platform in the southern North Sea, a modern harsh-environment jack-up operating in shallow water on a hard sandy bottom encountered an incrementally increasing, partly scour-induced, problem with eccentric spudcan loading and associated rack phase difference (RPD). After 3 months on location, while the unit was in the process of being re-levelled for the third time, leg braces were damaged. The decision was taken to move the jack-up to a shipyard to repair the damage, and this paper describes the analytical and practical steps that were taken to do so in the least hazardous manner. The mechanics of the RPD effect are described in detail, and the observed bracing damage is assessed against the theoretical models that were used to predict behaviour. Some general conclusions on the best methods of handling units suffering this type of damage are drawn, and suggestions are made on how to minimise similar damage in the future.
Revue / Journal Title
Marine structures
ISSN
0951-8339
Source / Source
2004, vol. 17, n
o 3-4 (191 p.) [Document : 27 p.] (bibl.: dissem.), pp. 325-351 [27 page(s) (article)]
Langue / Language
Anglais
Editeur / Publisher
Elsevier, Kidlington, ROYAUME-UNI
(1988)
(Revue)
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Localisation / Location
INIST-CNRS, Cote INIST : 21685, 35400012066461.0090
Nº notice refdoc (ud4) : 16258699
