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7409994 Drilling well with drilling fluid of fluid phase and weighting agent  
An additive that increases the density of fluids used in a wellbore during the construction or repair of oil, gas, injection, water, or geothermal wells comprises In one illustrative embodiment the...
7392845 Method of treating oil or gas well with biodegradable emulsion  
A biodegradable water-in-synthetic oil base emulsion, effective in the removal of filter cakes, consists of an external phase of a surfactant emulsified in a paraffinic base oil. The emulsion is...
7380606 Composition and process for well cleaning  
Disclosed is a microemulsion well treatment microemulsion that is formed by combining a solvent-surfactant blend with a carrier fluid. In preferred embodiments, the solvent-surfactant blend...
7361628 Remote delivery of latex drag-reducing agent without introduction of immiscible low-viscosity flow facilitator  
Latex drag reducers and systems for delivering latex drag reducers are disclosed. The latex drag reducers comprise a polymer that is formed via an emulsion polymerization reaction dispersed in a...
7332460 Alkylxylene sulfonates for enhanced oil recovery processes  
The present invention is directed to alkylxylene sulfonate for enhanced oil recovery processes. The alkylxylene moiety in the alkylxylene sulfonate contains a high percentage of the...
7326817 Process for reducing the toxicity of hydrocarbons  
This invention relates to a method for reducing the toxicity of a mixture of hydrocarbons by means of fractional distillation, a distillate having a reduced toxicity and a composition including the...
7316275 Well treating compositions containing water superabsorbent material and method of using the same  
A well treating composition containing a polysaccharide-based water-superabsorbent material has particularly applicability as a thermal insulating, fracturing or acid stimulation fluid. The...
7297661 Synthetic base fluid for enhancing the results of crude oil characterization analyses  
Blends of synthetic olefins for use as the continuous phase of fluids selected from the group consisting of drilling, drill-in, and completion fluids. The blends meet EPA discharge requirements...
7296627 Method for simultaneous removal of asphaltene, and/or paraffin and scale from producing oil wells  
A method for cleaning oil wells to increase the flow of oil thereof by use of a unique aqueous cleaning emulsion comprising of water, hydrocarbon solvent, detergent and mineral acid. This one step...
7293611 CO2 miscible optimized hydrocarbon blends and methods of using CO2 miscible optimized hydrocarbon blends  
A method of treating a subterranean formation comprising the steps of providing a servicing fluid comprising carbon dioxide and a hydrocarbon blend, wherein the hydrocarbon blend comprises at least...
7291651 Carbon dioxide foamed fluids  
An aqueous viscoelastic surfactant (VES) fluid foamed or energized with carbon dioxide, in which the VES is more compatible with the carbon dioxide, is made by the addition of one or more than one...
7279447 Subterranean well and oil or gas stream treatment with bis(3-alkoxyalkan-2-ol) sulfides, sulfones, and sulfoxides: new surface active agents  
Compositions containing surfactant compounds according to formula (I) ROCH 2 CH(OH)CR 1 R 2 ZCR 1 R 2 CH(OH)CH 2 OR, ...
7270184 Method of well treatment  
The invention provides a method of well treatment comprising introducing into the matrix surrounding a hydrocarbon well bore hole an emulsion the discontinuous phase of which comprises a...
7265079 Self-destructing filter cake  
A composition and method are given for self-destructive fluid loss additives and filter cakes in wellbores and subterranean formations. The fluid loss additives and filter cakes are formed from a...
7262153 Method and composition for enhanced hydrocarbons recovery  
A method of treating a hydrocarbon containing formation is described. The method may include providing a hydrocarbon recovery composition to the hydrocarbon containing formation. Hydrocarbons in...
7259192 Molecular weight reduction of polysaccharides by electron beams  
A method of depolymerizing galactomannan-type polysaccharide polymers and xanthan, preferably galactomannans, to a pre-selected lower molecular weight by irradiation with high energy electron...
7229950 Method and composition for enhanced hydrocarbons recovery  
A method of treating a hydrocarbon containing formation is described. The method may include providing a hydrocarbon recovery composition to the hydrocarbon containing formation. Hydrocarbons in...
7220709 Process of diverting stimulation fluids  
A process for stimulating a formation is disclosed wherein a diverting fluid is used to divert an acid treatment package from a high permeability or damaged portion of a formation to a low...
7219735 Packer fluid  
A packer fluid is provided for use with a wellbore fluid in an annulus or casing bore, having an aqueous portion which contains additives for preventing corrosion, microbiological activity, salt...
7213645 Methods of improving well bore pressure containment integrity  
Methods of improving the pressure containment integrity of subterranean well bores are provided. The methods include pumping a fracture sealing composition into the well bore that rapidly converts...
7211550 Compositions for controlling scaling and completion fluids  
An aqueous-based composition containing cesium formate and at least one chelating agent is described. Methods of removing scaling deposits, which may include alkaline earth metal sulfates, present...
7196040 Microcapsule well treatment  
A material and a device for releasing chemicals in a fluid environment is disclosed, and a method for releasing substances into downhole fluid environments. The invention also relates to materials...
7186673 Stability enhanced water-in-oil emulsion and method for using same  
A method for enhancing the stability of a water-in-oil emulsion pretreating at least a portion of the oil prior to emulsification. The pretreatment step may consist of adding polymers to the oil,...
7183239 Gel plugs and pigs for pipeline use  
Coacervate gels having excellent shear viscosities and other properties are made with anionic or cationic polymers, a smaller amount of a surfactant having a charge opposite that of the polymer,...
7169739 Methods of reducing sag in non-aqueous fluids  
Methods of reducing sag include combining a cystol ester compound with a non-aqueous fluid and particles to reduce sag in the resulting fluid composition without significantly increasing the...
7168490 Optimized hydrocarbon blends and methods of using optimized hydrocarbon blends  
The present invention relates to servicing fluids for use in subterranean operations. More particularly, the present invention relates to improved servicing fluids comprising optimized hydrocarbon...
7166560 Generating Acid Downhole in Acid Fracturing  
An acid fracturing method is provided in which the acid is generated in the fracture by hydrolysis of a solid acid-precursor selected from one or more than one of lactide, glycolide, polylactic...
7151078 Gelable liquid and method for selectively inhibiting the gelation of a gelable liquid  
A controlled-gelation aqueous solution is proposed. The solution contains a hydrophobically-aggregating gelling agent, and an effective amount of an inhibitor which suppresses hydrophobic...
7150322 Cement compositions comprising environmentally compatible defoamers and methods of use  
Cement compositions including environmentally compatible defoamers and methods of using such cement compositions are provided herein. An example of a method is a method of cementing in a...
7094736 Sampling of hydrocarbons from geological formations  
A method of separating from a mixture of oil-based drilling fluid and sample of formation hydrocarbon, the liquid component of the drilling fluid, which method comprises treating, e.g. chemically,...
7084095 Methods for controlling the rheological properties of viscoelastic surfactants based fluids  
It was found that the addition of polymers to viscoelastic surfactant base system allows to adjust the rheological properties of the base fluid. Depending in particular on one side of the ratio of...
7081437 Environmentally compatible hydrocarbon blend drilling fluid  
A method of formulating and the resulting biodegradable wellbore fluid includes a first synthetic internal olefin fraction having from 16 to 18 carbon atoms (C 16-18 IO), a second synthetic...
7033977 Compositions and methods for sealing formations  
The present invention generally relates to compositions of matter and methods of using those compositions. More particularly, and as part of one of the preferred embodiments, the present invention...
7018956 Crosslinked polymer fluids and crosslinking concentrates therefor  
Disclosed is a concentrate composition for crosslinking polysaccharide polymers hydrated in an aqueous liquid, and well servicing fluids, preferably fracturing fluids, prepared therewith. Preferred...
7008908 Selective stimulation with selective water reduction  
A method for preferentially treating a subterranean formation having at least one primarily oil producing layer and at least one primarily water producing layer. The method involves the steps of...
6984610 Acid based micro-emulsions of surfactants and solvents  
Acid based micro-emulsions are disclosed comprising water, an acid blend, an anionic surfactant, a nonionic surfactant, a co-solvent, a solvent and an oxidizer. The micro-emulsions have particular...
6968898 System and method for removing particles from a well bore penetrating a possible producing formation  
A system and method for removing particles from a well bore penetrating a possible hydrocarbon producing formation, according to which drilling fluid is mixed with a weighted material, and the...
6939833 Additive for, treatment fluid for, and method of plugging a tubing/casing annulus in a well bore  
For tubing/casing annulus plug treatment to plug a well, a tubing/casing annulus plug additive including a dry mixture of water soluble crosslinkable polymer, a crosslinking agent, a filter aid,...
6938693 Methods for controlling screenouts  
Methods are presented to induce a screenout during a subterranean formation fracturing or combined fracturing and gravel packing treatment by laying down a filter cake early in the treatment, then...
6927194 Well kill additive, well kill treatment fluid made therefrom, and method of killing a well  
For well kill treatment to prevent the intrusion of formation fluids into the wellbore while the well is open, a well kill additive including a dry mixture of water soluble crosslinkable polymer, a...
6924253 Scale removal  
A method for treating a wellbore (or well casing) and the contiguous wellbore area to remove scale (mineral deposits comprised of, e.g., BaSO4, CaCO3, etc.) in the context of hydrocarbon recovery...
6887833 Oil based compositions and method for temporarily sealing subterranean zones  
The present invention provides oil based compositions and methods of using the compositions for temporarily sealing subterranean zones. The compositions are basically comprised of oil, a hydratable...
6881709 Viscosity reduction of viscoelastic surfactant based fluids  
Methods and compositions are disclosed for controlled addition of components that decrease the viscosity of the viscoelastic surfactant fluids or for controlled changes in the electrolyte...
6838417 Compositions and methods including formate brines for conformance control  
Compositions and methods are provided for reducing the permeability of subterranean zones. More particularly, water-soluble polymeric compositions which form cross-linked gels in the zones. In...
6800593 Hydrophilic polymer concentrates  
Disclosed is a hydrophilic, water soluble polymer concentrate for addition to aqueous liquids to enhance the properties thereof, particularly to increase the viscosity or decrease the fluid loss of...
6746992 High density thermally stable well fluids  
High density, thermally stable, brine-based well fluids and methods of using the same are disclosed. In one embodiment a well fluid including water and a salt, the salt including at least one...
6734144 Solids-stabilized water-in-oil emulsion and method for using same  
A method for enhancing the stability of a solids-stabilized water-in-oil emulsion by pretreating the oil prior to emulsification. The pretreatment step can be accomplished by adding dilute acid to...
6645769 Reservoir monitoring  
A method for monitoring hydrocarbon and water production from different production zones/sections in a hydrocarbon reservoir and/or injection wells and detection of different phenomena such as e.g....
6620769 Environmentally acceptable fluid polymer suspension for oil field services  
This invention provides a water-free oil based fluid polymer suspension composition for use as a rheology modifier and fluid loss reducer in oil or gas well servicing fluids. It has been found that...
6613720 Delayed blending of additives in well treatment fluids  
The effect of various chemical or biological agents in well treatment fluids can be delayed by sequestering the agents in the discontinuous phase of an emulsion for a period of time, before the...
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