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Technical Briefs

Nano-Enhanced Drilling Fluids: Pioneering Approach to Overcome Uncompromising Drilling Problems

[+] Author and Article Information
J. Abdo

M. Danish Haneef

Mechanical and Industrial Engineering Department, P.O Box: 33,  Sultan Qaboos University, Muscat 123, Omanm087813@squ.edu.om

J. Energy Resour. Technol 134(1), 014501 (Dec 23, 2011) (6 pages) doi:10.1115/1.4005244 History: Received September 08, 2010; Revised September 02, 2011; Published December 23, 2011; Online December 23, 2011

The idea of pushing the limits of drilling oil and gas wells by improving drilling fluids for undemanding and cost efficient drilling operations by extracting advantage from the wonders of nanotechnology forms the basis of the work presented here. Foremost, in order to highlight the significance of reducing the size distribution of particles, new clay ATR which has a chain like structure and offers enormous surface area and increased reactivity was tested in different sizes that were chemically and mechanically milled. Bentonite which is a commonly used drilling fluid additive was also tested in different particle size distribution (PSD) and rheological properties were tested. Significant reduction in viscosity with small sized particles was recorded. The tested material called ATR throughout this paper is shown to offer better functionality than bentonite without the requirement of other expensive additives. Experiments were performed with different size distributions and compositions and drastic changes in rheological properties are observed. A detailed investigation of the shear thinning behavior was also carried out with ATR samples in order to confirm its functionality for eliminating the problem of mechanical and differential pipe sticking, while retaining suitable viscosity and density for avoidance of problems like lost circulation, poor hole cleaning and inappropriate operating hydrostatic pressures.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Equipment used (a) Milling (b) Viscosity measurement (c) Sampling (d) Density measurement

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Figure 2

Shear thinning behaviors of samples 1–4

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Figure 3

Density (g/cm3 ) of samples with different PSD of ATR

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Figure 4

Shear thinning behaviors of samples 7–10

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