Shale inhibition additive for oil/gas down hole fluids and methods for making and using same
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United States of America Patent
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Sep 11, 2007
Grant Date -
Jun 1, 2006
app pub date -
Nov 29, 2004
filing date -
Nov 29, 2004
priority date (Note) -
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Abstract
An under-balanced drilling fluid additive is disclosed which reduces reactive shale and/or clay swelling during under-balanced drilling operations, where the additive includes an effective amount of a choline salt. A method for under-balanced drilling is also disclosed including the step of circulating a drilling fluid including an effective amount of a choline salt to reduce reactive shale and/or clay swelling during under-balanced drilling operations.
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