TY - GEN
T1 - Prediction of sonic flow conditions at drill bit nozzles to minimize complications in UBD
AU - Guo, B.
AU - Ghalambor, A.
AU - Al-Bemani, A. S.
N1 - Funding Information:
The authors are grateful to the Office of Faculty Development and Academic Planning at the University of Louisiana at Lafayette for providing Faculty Summer Research Awards to financially support this study. The authors also thank ChevronTexasco for providing Chevron I/Board of Regents support fund in Petroleum Engineering throughout this research.
Publisher Copyright:
© 2018 Canadian Institute of Mining Metallurgy and Petroleum. All rights reserved.
PY - 2002
Y1 - 2002
N2 - Sonic flow of liquid-gas mixtures at drill bit nozzles is believed to be responsible for some complications in underbalanced drilling (UBD), owing to pressure discontinuity and temperature drop at the nozzles. It is vitally important to avoid this flow condition in UBD by selecting optimal nozzle size and fluid flow rates. However, there is no method that can be used for prediction of the sonic flow condition. This paper introduces an analytical model for calculating the critical pressure ratio when two-phase sonic flow occurs. The analytical model can be coded in a spreadsheet. The critical pressure ratio charts are also provided for field engineers. Use of the model and charts in selection of bit nozzle size and two-phase flow rates will reduce complications in UBD.
AB - Sonic flow of liquid-gas mixtures at drill bit nozzles is believed to be responsible for some complications in underbalanced drilling (UBD), owing to pressure discontinuity and temperature drop at the nozzles. It is vitally important to avoid this flow condition in UBD by selecting optimal nozzle size and fluid flow rates. However, there is no method that can be used for prediction of the sonic flow condition. This paper introduces an analytical model for calculating the critical pressure ratio when two-phase sonic flow occurs. The analytical model can be coded in a spreadsheet. The critical pressure ratio charts are also provided for field engineers. Use of the model and charts in selection of bit nozzle size and two-phase flow rates will reduce complications in UBD.
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U2 - 10.2118/2002-010
DO - 10.2118/2002-010
M3 - Conference contribution
AN - SCOPUS:85088074759
SN - 9781613991091
T3 - Canadian International Petroleum Conference 2002, CIPC 2002
BT - Canadian International Petroleum Conference 2002, CIPC 2002
PB - Petroleum Society of Canada (PETSOC)
T2 - Canadian International Petroleum Conference 2002, CIPC 2002
Y2 - 11 June 2002 through 13 June 2002
ER -