Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2007-02-21
2009-11-24
Seidleck, James (Department: 1796)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S106000, C507S112000, C507S113000, C507S114000, C507S120000, C507S129000, C507S134000, C507S136000, C507S141000, C507S143000, C507S206000, C507S211000, C507S213000, C507S214000, C507S218000, C507S224000, C507S225000, C507S241000, C507S259000, C507S261000, C507S269000, C507S276000
Reexamination Certificate
active
07622427
ABSTRACT:
A completion and workover fluid composition comprising, water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient selected from the group consisting of inorganic salts, shale inhibitors, corrosion inhibitor, biocide, defoamers and finely divided solids particles (e.g., bentonite, attapulgite, sepiolite, calcium carbonate, etc.), depending upon the desired attributes, wherein the rheology modifier and/or the fluid loss control agent is an ethoxylated raw cotton linters or a modified ethoxylated raw cotton linters. The ethoxylated raw cotton linters provides comparable or better rheology and viscosity properties compared to high molecular weight commercial HECs made from purified cotton linters. These ethoxylated raw cotton linters derivatives are suitable for applications in oil-well servicing fluids, particularly to enhance functional properties of completion and workover fluids used during oil-well drilling operations.
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Derwent Abstract of DE 4034709 A, entitled “Cellulose ether products with high degree of polymerization prepared by etherifying raw cotton llinters . . . ”, Nov. 1, 1990.
Derwent Abstract of DE 4034709A, entitled “Cellulose ether products with high degree of polymerization prepared by etherifying raw cotton linters . . . ”, Nov. 1, 1990.
Melbouci Mohand
Sau Arjun C.
Figueroa John J
Fobare Rossi Joanne Mary
Hercules Incorporated
O'Brien Robert O'Flynn
Seidleck James
LandOfFree
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