Well working compositions, method of decreasing the seepage loss from such compositions, and additive therefor
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United States of America Patent
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Apr 2, 1991
Grant Date -
N/A
app pub date -
Oct 16, 1989
filing date -
Oct 16, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides well working fluid compositions containing oat hulls ground to certain particle size ranges to decrease the seepage loss of the fluid to fluid permeable formations contacted by the compositions. Also provided is a seepage loss additive comprising the ground oat hulls in combination with one or more of ground corn cobs, hydrophobic organophilic water wettable cotton, ground citrus pulp, and ground cotton burrs.
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