E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/26 (2006.01) C11D 1/02 (2006.01) C11D 1/66 (2006.01) C11D 3/02 (2006.01) C11D 3/16 (2006.01) C09K 7/02 (2000.01)
Patent
CA 2380311
Viscoelastic surfactant based aqueous fluid systems useful as thickening agents in various applications, e.g. to suspend particles produced during the excavation of geologic formations. The surfactants are zwitterionic/amphoteric surfactants such as dihydroxyl alkyl glycinate, alkyl ampho acetate or propionate, alkyl betaine, alkyl amidopropyl betaine and alkylamino mono- or di-propionates derived from certain waxes, fats and oils. The thickening agent is used in conjunction with an inorganic water-soluble salt or organic additive such as phthalic acid, salicylic acid or their salts.
Dahanayake Manilal S.
Derian Paul-Joel
Dino David
Li Ruoxin
Niu Joseph H. Y.
Gowling Lafleur Henderson Llp
Rhodia Inc.
Schlumberger Canada Limited
Schlumberger Technology Corporation
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