Fluid loss reducer for high temperature and high pressure water-based mud application
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United States of America Patent
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Sep 5, 2006
Grant Date -
Jul 8, 2004
app pub date -
Dec 17, 2003
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 fluid loss reducer. The subject invention further reveals a process for preparing an oil soluble polymer fluid loss control agent comprising the steps of dissolving at least one polymer in a hydrocarbon oil to form a clear solution or a gel, adding an emulsifier to the solution or the gel, and keeping the mixture under conditions of agitation until a clear creamy mixture is obtained.
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