TY - GEN
T1 - Finite element analysis of tubular ovality in oil well
AU - Pervez, Tasneem
AU - Qamar, Sayyad Zahid
PY - 2011
Y1 - 2011
N2 - This paper presents the finite element analysis of tubular expansion in oval bore holes such as those frequently observed in Upper Natih reservoirs. The minimum inner diameter of the expanded tubular must be larger than the drift diameter set by American Petroleum Institute (API) standards. If the minimum inner diameter is smaller than drift diameter, completion equipments can not be run successfully, which is necessary to complete an oil-well for production. The phenomenon of tubular ovality has been previously unknown to petroleum industry. Finite element model of tubular expansion in oval bore-holes is developed to determine the tubular ovality and compared with measured ovality. It was found that ovality increases linearly with tubular expansion ratio. With increase in expansion ratio, the tubular contact length with formation and developed contact pressure increases. Tubular ovality, if not considered in well design, may lead to premature tubular failure due to lower collapse rating and higher stresses.
AB - This paper presents the finite element analysis of tubular expansion in oval bore holes such as those frequently observed in Upper Natih reservoirs. The minimum inner diameter of the expanded tubular must be larger than the drift diameter set by American Petroleum Institute (API) standards. If the minimum inner diameter is smaller than drift diameter, completion equipments can not be run successfully, which is necessary to complete an oil-well for production. The phenomenon of tubular ovality has been previously unknown to petroleum industry. Finite element model of tubular expansion in oval bore-holes is developed to determine the tubular ovality and compared with measured ovality. It was found that ovality increases linearly with tubular expansion ratio. With increase in expansion ratio, the tubular contact length with formation and developed contact pressure increases. Tubular ovality, if not considered in well design, may lead to premature tubular failure due to lower collapse rating and higher stresses.
KW - Finite element analysis
KW - Tubular expansion
KW - Tubular ovality
KW - Zonal isolation
UR - http://www.scopus.com/inward/record.url?scp=79961034414&partnerID=8YFLogxK
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U2 - 10.4028/www.scientific.net/AMR.264-265.1654
DO - 10.4028/www.scientific.net/AMR.264-265.1654
M3 - Conference contribution
AN - SCOPUS:79961034414
SN - 9783037850534
T3 - Advanced Materials Research
SP - 1654
EP - 1659
BT - Advances in Materials and Processing Technologies II, AMPT 2009
T2 - International Conference on Advances in Materials and Processing Technologies, AMPT 2009
Y2 - 26 October 2009 through 29 October 2009
ER -