Well fluid additive, well fluid made therefrom, method of treating a well fluid, method of circulating a well fluid
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United States of America Patent
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Jun 9, 1998
Issued Date -
N/A
app pub date -
Nov 26, 1996
filing date -
Mar 28, 1991
priority date (Note) -
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Abstract
An drilling fluid additive to reduce loss circulation includes comminuted rice fraction and corn cobs, and includes ground at least one of ground wood fiber, ground nut shells, ground paper and shredded cellophane. A method of treating a drilling fluid includes contacting such drilling fluid additive with the base drilling fluid to form well fluid. A method of operating a well includes circulation of such a well fluid into and out of a borehole.
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