Landing string design and strength check in ultra-deepwater condition / Zhang Hui in Journal of natural gas science and engineering, Vol. 2 N° 4 (Septembre 2010)  

Public ISBD [article]  inJournal of natural gas science and engineering > Vol. 2 N° 4 (Septembre 2010) . - pp.178–182 Titre : Landing string design and strength check in ultra-deepwater condition Type de document : texte imprimé Auteurs : Zhang Hui, Auteur ; Gao Deli, Auteur ; Tang Haixiong, Auteur Année de publication : 2012 Article en page(s) : pp.178–182 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Ultra-deepwater drilling Landing string design Strength check Bending stress Dynamic load Résumé : Landing string used in ultra-deepwater casing running operations sustains complicated loads, including axial load, slip crushing load, bending load and dynamic load. Landing string design methods based on tension load are presented in detail. In these methods, sufficient margin of over pull is taken into account for the extreme axial load during surface casing running operations and environment loads caused by wave, current and vessel offset and heave. Landing string strength check is discussed to evaluate the safety of landing string in harsh environment. According to the analysis, slip crushing capacity is one of the critical limitations for landing string; bending stress caused by currents is great at the top of landing string at the beginning of operations while it will decrease by adjusting the vessel position after setting the casing below mud line. ISSN : 1875-5100 En ligne : http://www.sciencedirect.com/science/article/pii/S1875510010000375 [article] Landing string design and strength check in ultra-deepwater condition [texte imprimé] / Zhang Hui, Auteur ; Gao Deli, Auteur ; Tang Haixiong, Auteur . - 2012 . - pp.178–182. Génie Chimique Langues : Anglais (eng) in Journal of natural gas science and engineering > Vol. 2 N° 4 (Septembre 2010) . - pp.178–182 Mots-clés : Ultra-deepwater drilling Landing string design Strength check Bending stress Dynamic load Résumé : Landing string used in ultra-deepwater casing running operations sustains complicated loads, including axial load, slip crushing load, bending load and dynamic load. Landing string design methods based on tension load are presented in detail. In these methods, sufficient margin of over pull is taken into account for the extreme axial load during surface casing running operations and environment loads caused by wave, current and vessel offset and heave. Landing string strength check is discussed to evaluate the safety of landing string in harsh environment. According to the analysis, slip crushing capacity is one of the critical limitations for landing string; bending stress caused by currents is great at the top of landing string at the beginning of operations while it will decrease by adjusting the vessel position after setting the casing below mud line. ISSN : 1875-5100 En ligne : http://www.sciencedirect.com/science/article/pii/S1875510010000375

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