Determination of optimal air flow rate in air drilling

Michael A. Adewumi, Shifeng Tian

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Optimal design of any drilling program requires good knowledge of wellbore hydraulics. Established techniques are available for formulating some understanding of the associated wellbore hydraulics for conventional mud drilling, but this is not the case for air drilling. The wellbore hydraulics of air drilling present distinctly different problems from those associated with mud drilling. A systematic study of these problems, especially utilizing fundamental approaches, is lacking. This study addresses this problem using a fundamental, hydrodynamic multiphase flow model for air drilling. Extensive parametric analysis of the system is performed to validate the viability of the model as a predictive tool. The model is demonstrably capable of predicting the pressure-drop profile in the annulus and the optimal lifting velocity, an essential ingredient in the optimal design of air drilling. The results demonstrate the ability of the model to predict a number of phenomena that are associated with lifting cuttings from the hole during air drilling. The model possesses scale-up capability.

Original languageEnglish (US)
Pages (from-to)1-11
Number of pages11
JournalJournal of Petroleum Science and Engineering
Volume8
Issue number1
DOIs
StatePublished - Jul 1992

Fingerprint

airflow
Drilling
drilling
Flow rate
air
Air
Drilling fluids
Hydraulics
hydraulics
mud
Multiphase flow
Pressure drop
rate
multiphase flow
Hydrodynamics
pressure drop
viability
hydrodynamics
Optimal design

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology

Cite this

Adewumi, Michael A. ; Tian, Shifeng. / Determination of optimal air flow rate in air drilling. In: Journal of Petroleum Science and Engineering. 1992 ; Vol. 8, No. 1. pp. 1-11.
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Determination of optimal air flow rate in air drilling. / Adewumi, Michael A.; Tian, Shifeng.

In: Journal of Petroleum Science and Engineering, Vol. 8, No. 1, 07.1992, p. 1-11.

Research output: Contribution to journalArticle

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