Inventor
DOVAN HOAI T
US26 patents
Patents
26 patentsUS5246073ASep 21, 1993
High temperature stable gels
UNION OIL CO166 citations99
US5203834AApr 20, 1993
Foamed gels having selective permeability
UNION OIL CO130 citations98
US5617920AApr 8, 1997
Method for modifying gelation time of organically crosslinked, aqueous gels
UNION OIL CO74 citations96
US5486312AJan 23, 1996
High temperature stable gels
UNION OIL CO58 citations96
US5268112ADec 7, 1993
Gel-forming composition
UNION OIL CO55 citations96
US5213446AMay 25, 1993
Drilling mud disposal technique
UNION OIL CO81 citations96
US5161615ANov 10, 1992
Method for reducing water production from wells
UNION OIL CO101 citations96
US4694906ASep 22, 1987
Method for emplacement of a gelatinous foam in gas flooding enhanced recovery
UNION OIL CO83 citations96
US4413680ANov 8, 1983
Permeability reduction in subterranean reservoirs
UNION OIL CO90 citations96
US5291949AMar 8, 1994
Method for inhibiting caustic flood breakthrough
UNION OIL CO33 citations93
US5244042ASep 14, 1993
Lanthanide-crosslinked polymers for subterranean injection
UNION OIL CO50 citations93
US5211858AMay 18, 1993
Lanthanide-crosslinked polymers for subterranean fluid containment
UNION OIL CO22 citations93
US5125456AJun 30, 1992
Composition for selectively reducing subterranean formation permeability
UNION OIL CO42 citations93
US5111886AMay 12, 1992
Crosslinked hydroxyethylcellulose and its uses
UNION OIL CO23 citations93
US4534412AAug 13, 1985
Continuous permeability reduction in subterranean reservoirs
UNION OIL CO40 citations93
US5957203ASep 28, 1999
Ultra-high temperature stable gels
UNION OIL CO20 citations92
US5762141AJun 9, 1998
Ultra-high temperature stable gels
UNION OIL CO35 citations92
US5335733AAug 9, 1994
Method for delaying gelation of a gelable polymer composition injected into a subterranean formation
UNION OIL CO43 citations92
US5145012ASep 8, 1992
Method for selectively reducing subterranean water permeability
UNION OIL CO33 citations92
US5139087AAug 18, 1992
Method for ensuring injectivity of polymer solutions
UNION OIL CO18 citations82
US5418217AMay 23, 1995
Composition for selectively reducing subterranean formation permeability
UNION OIL CO17 citations74
US5263540ANov 23, 1993
Crosslinked hydroxyethylcellulose and its uses
UNION OIL CO17 citations74
US5226480AJul 13, 1993
Recovery system containing lanthanide-crosslinked polymers
UNION OIL CO18 citations74
US5207934AMay 4, 1993
Crosslinked hydroxyethylcellulose and its uses
UNION OIL CO16 citations74
US4783492ANov 8, 1988
Continuous permeability reduction in subterranean reservoirs
UNION OIL CO15 citations74
US5225090AJul 6, 1993
Visible gels prepared using stainless steel as a crosslinking agent
UNION OIL CO6 citations63