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dc.contributor.advisorGray, Kenneth E., Ph. D.en
dc.creatorAlabdullatif, Ziad Abdullrahmanen
dc.date.accessioned2011-10-05T19:43:48Zen
dc.date.available2011-10-05T19:43:48Zen
dc.date.created2011-08en
dc.date.issued2011-10-05en
dc.date.submittedAugust 2011en
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2011-08-2663en
dc.descriptiontexten
dc.description.abstractDownhole vibrations lead to downhole failures and decrease the rate of penetration (ROP). The bottom hole assembly (BHA) static and dynamic design is a key factor in optimizing drilling operations. The BHA should be designed to minimize the vibration levels in the axial, lateral, and torsional directions. This would be achieved by avoiding rotating the drillstring in the speeds that are nearby the natural frequency of BHA. The complexity associated with current BHA components requires using advanced computational tools that are capable of solving complex and time-consuming equations. Finite Element Analysis (FEA) is the most used technique in analyzing vibration behavior of the drillstring by mesh discretizing of a continuous body into small elements. This thesis will study the dynamic behavior of different BHA designs for Manifa and Karan fields of Saudi Aramco to optimize the drilling operations. The FEA software that will be used to conduct these studies is called Vibrascope™, which was developed by NOV. The software will determine the critical speeds of the drillstring that should be avoided to prevent resonance of the BHA, which will lead to severe downhole vibration.en
dc.format.mimetypeapplication/pdfen
dc.language.isoengen
dc.subjectVibrationen
dc.subjectStick slipen
dc.subjectAxialen
dc.subjectLateralen
dc.subjectTorsionalen
dc.subjectManifaen
dc.subjectKaranen
dc.subjectAramcoen
dc.titleAnalysis of downhole drilling vibrations : case studies of Manifa and Karan fields in Saudi Arabiaen
dc.date.updated2011-10-05T19:44:13Zen
dc.identifier.slug2152/ETD-UT-2011-08-2663en
dc.contributor.committeeMemberFlorence, Freden
dc.description.departmentPetroleum and Geosystems Engineeringen
dc.type.genrethesisen
thesis.degree.departmentPetroleum and Geosystems Engineeringen
thesis.degree.disciplinePetroleum Engineeringen
thesis.degree.grantorUniversity of Texas at Austinen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Science in Engineeringen


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