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dc.contributor.advisorGray, Kenneth E., Ph. D.
dc.creatorAlabdullatif, Ziad Abdullrahman
dc.date.accessioned2011-10-05T19:43:48Z
dc.date.available2011-10-05T19:43:48Z
dc.date.created2011-08
dc.date.issued2011-10-05
dc.date.submittedAugust 2011
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2011-08-2663
dc.descriptiontext
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.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.subjectVibration
dc.subjectStick slip
dc.subjectAxial
dc.subjectLateral
dc.subjectTorsional
dc.subjectManifa
dc.subjectKaran
dc.subjectAramco
dc.titleAnalysis of downhole drilling vibrations : case studies of Manifa and Karan fields in Saudi Arabia
dc.date.updated2011-10-05T19:44:13Z
dc.identifier.slug2152/ETD-UT-2011-08-2663
dc.description.departmentPetroleum and Geosystems Engineering
dc.type.genrethesis*
thesis.degree.departmentPetroleum and Geosystems Engineering
thesis.degree.disciplinePetroleum Engineering
thesis.degree.grantorUniversity of Texas at Austin
thesis.degree.levelMasters
thesis.degree.nameMaster of Science in Engineering


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