Prediction of sonic flow conditions at drill bit nozzles to minimize complications in UBD

B. Guo; A. Ghalambor; A. S. Al-Bemani

doi:10.2118/2002-010

Prediction of sonic flow conditions at drill bit nozzles to minimize complications in UBD

B. Guo, A. Ghalambor, A. S. Al-Bemani

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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.

Original language	English
Title of host publication	Canadian International Petroleum Conference 2002, CIPC 2002
Publisher	Petroleum Society of Canada (PETSOC)
ISBN (Print)	9781613991091
DOIs	https://doi.org/10.2118/2002-010
Publication status	Published - 2002
Externally published	Yes
Event	Canadian International Petroleum Conference 2002, CIPC 2002 - Calgary, Canada Duration: Jun 11 2002 → Jun 13 2002

Publication series

Name	Canadian International Petroleum Conference 2002, CIPC 2002

Other

Other	Canadian International Petroleum Conference 2002, CIPC 2002
Country/Territory	Canada
City	Calgary
Period	6/11/02 → 6/13/02

ASJC Scopus subject areas

Geochemistry and Petrology
Energy Engineering and Power Technology

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10.2118/2002-010

Cite this

Prediction of sonic flow conditions at drill bit nozzles to minimize complications in UBD. / Guo, B.; Ghalambor, A.; Al-Bemani, A. S.
Canadian International Petroleum Conference 2002, CIPC 2002. Petroleum Society of Canada (PETSOC), 2002. (Canadian International Petroleum Conference 2002, CIPC 2002).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Guo, B, Ghalambor, A & Al-Bemani, AS 2002, Prediction of sonic flow conditions at drill bit nozzles to minimize complications in UBD. in Canadian International Petroleum Conference 2002, CIPC 2002. Canadian International Petroleum Conference 2002, CIPC 2002, Petroleum Society of Canada (PETSOC), Canadian International Petroleum Conference 2002, CIPC 2002, Calgary, Canada, 6/11/02. https://doi.org/10.2118/2002-010

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abstract = "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.",

author = "B. Guo and A. Ghalambor and Al-Bemani, {A. S.}",

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AU - Guo, B.

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AU - Al-Bemani, A. S.

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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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Y2 - 11 June 2002 through 13 June 2002

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Prediction of sonic flow conditions at drill bit nozzles to minimize complications in UBD

Abstract

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