Drilling fluid and filter cake removal methods and compositions
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United States of America Patent
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Mar 26, 1996
Grant Date -
N/A
app pub date -
Sep 15, 1994
filing date -
Sep 15, 1994
priority date (Note) -
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Abstract
Methods and compositions for removing gelled and dehydrated drilling fluid and filter cake from the walls of wellbores are provided. The methods basically include contacting the drilling fluid and filter cake with a removal composition comprised of an aqueous sugar solution for a period of time sufficient to cause the disintegration of the drilling fluid and filter cake. The composition, having the disintegrated drilling fluid and filter cake dispersed therein, is then displaced from the wellbore.
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