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Browse by Category: Main > Chemistry
Class Information
Number: 507/241
Name: Earth boring, well treating, and oil field chemistry > Well treating > Contains organic component > Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding > Organic component contains plural carboxylic acid, ester, or salt groups attached directly or indirectly to nitrogen by nonionic bonding
Description: Compositions wherein the organic component contains plural carboxylic acid groups, carboxylic acid ester groups, or carboxylic acid salt groups which are attached to nitrogen directly or indirectly by nonionic bonding.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8709983 Non-phosphorus-based gellant for hydrocarbon fluids Apr. 29, 2014
8691736 Swellable polymer with cationic sites Apr. 8, 2014
8653009 Method for preventing the formation of calcium carboxylate deposits in the dewatering process for crude oil/water streams Feb. 18, 2014
8618025 Composition and method for reducing hydrate agglomeration Dec. 31, 2013
8507413 Methods using well drilling fluids having clay control properties Aug. 13, 2013
8415278 Compositions and methods for breaking a viscosity increasing polymer at very low temperature used in downhole well applications Apr. 9, 2013
8278252 Nano-sized particles for stabilizing viscoelastic surfactant fluids Oct. 2, 2012
8247355 Acidic viscosity enhancer for viscoelastic surfactant fluids Aug. 21, 2012
8207094 Wellbore treatment compositions containing foam extenders and methods of use thereof Jun. 26, 2012
8196662 Surfactant based viscoelastic fluids and methods of using the same Jun. 12, 2012
8188015 Methods and compositions for fracturing subterranean formations May. 29, 2012
8188014 In-situ solidification of invert emulsion fluids to form gas tight annular barrier May. 29, 2012
8183185 Well servicing fluid comprising an organic salt being the product of an organic acid and an organic amine base and method of servicing a well with the fluid May. 22, 2012
8097567 Well drilling fluids having clay control properties Jan. 17, 2012
8093187 Additive for viscoelastic fluid Jan. 10, 2012
8034748 Additives for inhibiting the formation of gas hydrates Oct. 11, 2011
8008236 Ortho ester breakers for viscoelastic surfactant gels and associated methods Aug. 30, 2011
8003575 Scale squeeze treatment systems and methods Aug. 23, 2011
7998908 Fluid loss control and well cleanup methods Aug. 16, 2011
7935662 System, method, and apparatus for injection well clean-up operations May. 3, 2011
7932216 Non-phosphorus-based gellants for hydrocarbon fluids Apr. 26, 2011
7928040 Compositions and methods for breaking a viscosity increasing polymer at very low temperature used in downhole well applications Apr. 19, 2011
7923417 Compositions and methods for breaking a viscosity increasing polymer at very low temperature used in downhole well applications Apr. 12, 2011
7915204 Scale squeeze treatment systems and methods Mar. 29, 2011
7906461 Thermally stable compositions and use thereof in drilling fluids Mar. 15, 2011
7879770 Oxidative internal breaker for viscoelastic surfactant fluids Feb. 1, 2011
7858562 Powder composition Dec. 28, 2010
7825075 Viscosity enhancers for viscoelastic surfactant stimulation fluids Nov. 2, 2010
7803744 Carbon dioxide foamed fluids Sep. 28, 2010
7741252 Surfactants not toxic to bacteria Jun. 22, 2010
7741251 Compositions and methods of stabilizing subterranean formations containing reactive shales Jun. 22, 2010
7723272 Methods and compositions for fracturing subterranean formations May. 25, 2010
7709421 Microemulsions to convert OBM filter cakes to WBM filter cakes having filtration control May. 4, 2010
7704926 Viscoelastic compositions Apr. 27, 2010
7687439 Method of removing an invert emulsion filter cake after the drilling process using a single phase microemulsion Mar. 30, 2010
7662756 Methods for effecting controlled break in pH dependent foamed fracturing fluid Feb. 16, 2010
7629296 Composition and method for thickening heavy aqueous brines with cationic guar Dec. 8, 2009
7622427 Ethoxylated raw cotton linters for completion and workover fluids Nov. 24, 2009
7618926 Method of foaming saturated or near saturated brines with synergistic mixtures Nov. 17, 2009
7589050 Composition comprising a fully dissolved non-HF fluoride source and method for treating a subterranean formation Sep. 15, 2009
7585816 Method for inhibiting hydrate formation Sep. 8, 2009
7575054 Self diverting matrix acid Aug. 18, 2009
7569522 Energized fluids and methods of use thereof Aug. 4, 2009
7566687 Methods and compositions for removing sulfur from liquid hydrocarbons Jul. 28, 2009
7566686 Shale inhibition additive for oil/gas down hole fluids and methods for making and using same Jul. 28, 2009
7550413 Fluid loss control agents for viscoelastic surfactant fluids Jun. 23, 2009
7544643 Viscosity enhancers for viscoelastic surfactant stimulation fluids Jun. 9, 2009
7514390 Method for removing filter cake from a horizontal wellbore using acid foam Apr. 7, 2009
7514391 Method and composition for removing filter cake from a horizontal wellbore using a stable acid foam Apr. 7, 2009
7435845 Corrosion and gas hydrate inhibitors having improved water solubility and increased biodegradability Oct. 14, 2008

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