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 language | English (US) |
|---|---|
| Pages (from-to) | 1-11 |
| Number of pages | 11 |
| Journal | Journal of Petroleum Science and Engineering |
| Volume | 8 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jul 1992 |
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All Science Journal Classification (ASJC) codes
- Fuel Technology
- Geotechnical Engineering and Engineering Geology
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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 journal › Article
TY - JOUR
T1 - Determination of optimal air flow rate in air drilling
AU - Adewumi, Michael A.
AU - Tian, Shifeng
PY - 1992/7
Y1 - 1992/7
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0026898926&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0026898926&partnerID=8YFLogxK
U2 - 10.1016/0920-4105(92)90040-8
DO - 10.1016/0920-4105(92)90040-8
M3 - Article
AN - SCOPUS:0026898926
VL - 8
SP - 1
EP - 11
JO - Journal of Petroleum Science and Engineering
JF - Journal of Petroleum Science and Engineering
SN - 0920-4105
IS - 1
ER -