Fluid loss reducer for high temperature high pressure water based-mud application
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United States of America Patent
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Aug 14, 2007
Grant Date -
Dec 14, 2006
app pub date -
Aug 23, 2006
filing date -
Dec 18, 2002
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Abstract
The present invention concerns a water-based drilling mud for utilization in the drilling of oil wells comprising an aqueous phase wherein the aqueous phase contains an oil soluble polymer in the form of a gel as a fluid loss reducer. The subject invention further reveals a method of lubricating a drilling bit during the drilling of a well which comprises circulating a water-based drilling mud in the vicinity of the drilling bit wherein the water-based drilling mud is comprised of an aqueous phase, and wherein the aqueous phase contains an oil soluble polymer in the form of a gel as a fluid loss reducer.
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