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Hoang V Le, Subramanian Kesavan, Jeffrey C Dawson, David J Mack, Scott G Nelson: Compositions and methods for hydraulic fracturing. BJ Services Company, O&apos Keefe Egan & Peterman, January 2, 2001: US06169058 (306 worldwide citation)

A subterranean formation is treated by introducing a fracturing treatment composition comprising a polymer treatment fluid containing a dispersion of hydrophilic water swellable particles into the formation. The water swellable particles comprise synthetic polymers that are crosslinked so that they ...


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Jeffrey C Dawson, Hoang V Le, Subramanian Kesavan: Compositions and methods for selective modification of subterranean formation permeability. BJ Services Company, O&apos Keefe Egan & Peterman, May 8, 2001: US06228812 (146 worldwide citation)

Compositions and methods for modifying the permeability of subterranean formations for the purpose of selectively reducing excessive production of aqueous fluids. The compositions include copolymers which may be added to an aqueous fluid to form a water control treatment fluid. The copolymers may in ...


3
Jeffrey C Dawson, Hoang V Le: Controlled degradation of polymer based aqueous gels. BJ Services Company, Charles D Gunter Jr, Susan L Firestone, September 5, 1995: US05447199 (28 worldwide citation)

A method of fracturing a subterranean formation in a well bore is shown in which a gellable fracturing fluid is first formed by blending together an aqueous fluid, a hydratable polymer, a suitable crosslinking agent for crosslinking the hydratable polymer to form a polymer gel and a breaker comprisi ...


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Jeffrey C Dawson, Subramanian Kesavan, Hoang V Le: Derivatization of polymers and well treatments using the same. BJ Services Company, O&apos Keefe Egan & Peterman, May 14, 2002: US06387853 (24 worldwide citation)

Polymers are derivatized and then may be introduced into a wellbore, such as in a hydraulic fracturing treatment. A polymer may be a guar powder that is mixed with a organic solvent and derivatized using a derivatizing agent, such as sodium chloroacetate. The polymer is typically derivatized in bulk ...


5
Hoang V Le, William R Wood: Method for increasing the stability of water-based fracturing fluids. BJ Services Company, Charles D Gunter Jr, July 13, 1993: US05226481 (20 worldwide citation)

A method for increasing the stability of water-based fracturing fluids is shown in which a base fracturing fluid is formulated by mixing together a hard mix water containing multivalent cations, a water soluble polymer and a cross-linking agent for the water soluble polymer. A water softener is adde ...


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