Process and water-base fluid utilizing hydrophobically modified cellulose derivatives as filtrate reducers
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United States of America Patent
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Sep 23, 1997
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N/A
app pub date -
Jul 1, 1996
filing date -
Mar 3, 1994
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Abstract
The present invention relates to a process used in a well for controlling the filtration of a drilling, a completion or a workover fluid set in a well. The process comprises adding a predetermined amount of at least one hydrophobically modified cellulose derivative. In a variant of the invention, the cellulose derivative is a hydrophobically modified hydroxyethylcellulose. The invention further relates to a drilling, a completion or a workover fluid including at least one hydrophobically modified cellulose derivative, for example hydrophobically modified hydroxyethylcellulose and notably viscosifiers such as polymers or reactive clay.
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