Invert biodegradable n-alkane(s) wellbore fluid containing less than 10 percent by weight of cycloparaffing isoparaffing and aromatic compounds, and method of drilling with such fluid
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United States of America Patent
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Dec 8, 1998
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app pub date -
Mar 17, 1997
filing date -
Sep 1, 1993
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Abstract
The invention concerns wellbore fluids suitable for use in the oil and gas exploration and production industries and embraces fluids used for drilling, completion, workover or packing of wellbores. The invention is especially concerned with biodegradable wellbore fluids the liquid phase of which consists of an oil, or of water-in-oil 'invert' emulsions, where the oil phase comprises n-alkanes.
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