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| Number | Title | Issue Date |
| 8003577 | Method of treating subterranean formation with crosslinked polymer fluid A method of treating a subterranean formation penetrated by a wellbore utilizes a treating fluid formed from an aqueous solution of a water-soluble polymer. The treating fluid further contains a crosslinking agent and an optional delayed release alkaline additive. T... | 08/23/2011 |
| 7645725 | Subterranean treatment fluids with improved fluid loss control Fluids useful as subterranean treatment fluids, and more particularly, polymeric fluid loss additives, subterranean treatment fluids with improved fluid loss control, and their associated methods of use, are provided. In one embodiment, the methods comprise: providi... | 01/12/2010 |
| 7304019 | Concentrated suspensions Suspensions are provided of water-soluble materials in non-aqueous carrier fluids using suspension agents that include organophilic clays. Methods of forming such suspensions are provided. Methods are also provided for using such suspensions to prepare aqueous solut... | 12/04/2007 |
| 7287586 | Compositions and methods for plugging and sealing a subterranean formation The invention provides for a composition for treating a subterranean formation, the composition comprising a water-swellable agent and a sealing agent. Preferably, the water-swellable agent: i) absorbs greater than 100 weight % of water; and ii) swells to greater th... | 10/30/2007 |
| 7271133 | Methods and compositions for treating subterranean formations Methods for treating subterranean formations and aqueous treating fluid compositions are provided. The aqueous treating fluid compositions comprise water, a water soluble hydrophobically modified gelling agent polymer produced by grafting a low concentration of hydr... | 09/18/2007 |
| 7264054 | Fluids comprising zirconium isopropylamine crosslinking agents and associated methods A method of treating a subterranean formation is provided, the method may comprise providing a fluid comprising an aqueous fluid, a gelling agent, and a zirconium triisopropylamine crosslinking agent; and introducing the fluid into a well bore that penetrates the su... | 09/04/2007 |
| 7262154 | Methods and compositions for breaking viscosified fluids Improved methods for treating and for fracturing subterranean formations and the fluid compositions are provided. The viscosity of a treating fluid containing gelling agents is broken, even at temperatures of about 250° F. and lower, utilizing an oxidizing breaker ... | 08/28/2007 |
| 7244694 | Viscoelastic fluids containing nanotubes for oilfield uses The present invention relates to viscoelastic fluids that contain nanotube structures that may be used advantageously as oilfield stimulation fluids in many different applications, most particularly as a fracturing fluid. Viscoelastic fluid compositions of the prese... | 07/17/2007 |
| 7216704 | Methods and compositions for breaking viscosified fluids Improved methods for treating and for fracturing subterranean formations and the fluid compositions are provided. A method presented herein is a method of reducing the viscosity of a viscosified treatment fluid that comprises providing a viscosified treatment fluid ... | 05/15/2007 |
| 7151076 | Low residue well treatment fluids and methods of use A low residue well treatment fluid comprises: an aqueous solvent; a gelling agent comprising one or more modified polysaccharides, the modified polysaccharides having hydrophilic groups; and a crosslinking composition. The fluid may optionally further comprise a gel... | 12/19/2006 |
| 7115546 | Acid diverting system containing quaternary amine 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 permeability or undamaged portion of a formation. The fluid, which preferably... | 10/03/2006 |
| 7036590 | Two stage subterranean zone fracturing fluids and methods The present invention discloses two stage subterranean zone fracturing fluids and methods. A two stage subterranean zone fracturing fluid of the invention comprises a first stage fluid comprising a foamed liquid containing a water soluble gel breaker and a second st... | 05/02/2006 |
| 7001872 | Subterranean formation treating fluid and methods of fracturing subterranean formations The present invention relates to methods and compositions for treating subterranean well formations, and more specifically, to improved subterranean formation treating fluid concentrates, treating fluids and methods of using such treating fluids in subterranean form... | 02/21/2006 |
| 6983799 | Method of using a swelling agent to prevent a cement slurry from being lost to a subterranean formation Methods of cementing in a subterranean formation include passing a swelling agent to a permeable zone in a subterranean formation. The swelling agent is combined with a carrier fluid before being passed to the permeable zone. Upon contacting an aqueous fluid, the sw... | 01/10/2006 |
| 6923264 | Methods of fracturing subterranean zones, fracturing fluids and breaker activators therefor A method of fracturing subterranean zones at temperature below about 200° F. wherein the fracturing fluid comprises water, a viscosity increasing gelling agent, a particulate proppant material, a delayed viscosity breaker for causing the fracturing fluid to revert ... | 08/02/2005 |
| 6918445 | Methods and compositions for treating subterranean zones using environmentally safe polymer breakers Methods and compositions for treating subterranean zones penetrated by well bores utilizing environmentally safe viscous fluids including a solubility increasing boron complex or ester forming compound. A method of the invention comprises the following steps. A visc... | 07/19/2005 |
| 6823939 | Methods of treating subterranean zones penetrated by well bores Methods of treating subterranean zones penetrated by well bores wherein the static temperatures of the zones are as high as 400° F. and greater include using aqueous treating fluids comprised of an aqueous liquid containing one or more inorganic monovalent salts, m... | 11/30/2004 |
| 6818597 | Suspensions of water soluble polymers in surfactant free non-aqueous solvents Liquid water soluble polymer suspensions in non-aqueous solvents are extremely stable over long periods of time with minimum separation of the solvent and no hard packing of the dispersed water soluble polymer. The suspensions enable a user to rapidly add the suspen... | 11/16/2004 |
| 6810959 | Low residue well treatment fluids and methods of use A low residue well treatment fluid comprises: an aqueous solvent; a gelling agent comprising one or modified polysaccharides, the modified polysaccharides having hydrophilic groups; and a crosslinking composition. The fluid may optionally further comprise a gel brea... | 11/02/2004 |
| 6806232 | Composition of drilling fluids comprising ground elastomeric crumb rubber material and a method of decreasing seepage and whole mud loss using such composition Well-working fluid compositions containing certain processed inorganic, oil and water wettable ground elastomeric crumb rubber materials to decrease the seepage loss of various fluids to subterranean formations in which these well working fluids are required and uti... | 10/19/2004 |
| 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 well drilling and servicing fluids, the concentrate comprising a hyd... | 10/05/2004 |
| 6784140 | Thermally stable, substantially water-free well fluid A method of treating a well including injecting a thermally stable, substantially water-free well-treating fluid into the well, wherein the well-treating fluid comprises a polymer, a glycol compound, and a salt is disclosed. In another embodiment, a thermally stable... | 08/31/2004 |
| 6770601 | Aphron-containing aqueous well drilling and servicing fluids The invention provides a method and fluid for drilling or servicing a well in a subterranean formation containing lost circulation zones or depleted, low pressure reservoirs. The fluid comprises an aqueous liquid having dispersed therein a viscosifier which increase... | 08/03/2004 |
| 6737385 | Well drilling and servicing fluids and methods of removing filter cake deposited thereby Well drilling and servicing fluids for use in producing formations and methods of removing filter cake therefrom are provided. The methods basically comprise using a drilling or servicing fluid comprised of water, a density increasing water soluble salt, a fluid los... | 05/18/2004 |
| 6720290 | Foaming agents for use in coal seam reservoirs A well treatment fluid composition that comprises a carrier fluid and an amphoteric surfactant, and optionally a viscosifying agent and proppant, is well suited for use in fracturing coal beds to stimulate methane production. The composition preferably is a foam tha... | 04/13/2004 |
| 6667279 | Method and composition for forming water impermeable barrier A swellable polymer gel composition for use in subterranean formations. The composition comprises water, a water soluble polymer, a water soluble crosslinking system and a swelling agent. The crosslinking system may be either a redox system or a chelating... | 12/23/2003 |
| 6640898 | High temperature seawater-based cross-linked fracturing fluids and methods The present invention provides seawater-based cross-linked fracturing fluids and methods of preparing and using the fluids in fracturing subterranean formations penetrated by well bores and having temperatures above about 200° F. The improved cross-linke... | 11/04/2003 |
| 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 by using white medicinal oil as a carrier, high solids co... | 09/16/2003 |
| 6561273 | 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 polymer, an organophilic clay, a water-swellable clay, an... | 05/13/2003 |
| 6488091 | Subterranean formation treating fluid concentrates, treating fluids and methods Subterranean formation treating fluid concentrates, treating fluids and methods are provided by the present invention. The treating fluid concentrates are basically comprised of water and a substantially fully hydrated depolymerized polymer. The treating ... | 12/03/2002 |
| 6451743 | Stable liquid suspension compositions and method of making and use thereof A new stable liquid suspension containing non-soluble particles dispersed in a non-aqueous liquid medium having a concentration of a suspension aid and a method of making and use thereof.... | 09/17/2002 |
| 6303544 | Modified cellulose products A modified cellulose product comprising cellulose ether, such as carboxymethyl cellulose, hydroxyethyl cellullose, carboxymethyl hydroxyethyl cellulose, methyl cellulose, hydroxyethyl methyl cellulose or ethyl hydroxyethyl cellulose, or xanthan gum produc... | 10/16/2001 |
| 6221152 | Stable suspension of hydrocolloids The present invention comprises a stable hydrocolloid welan gum in which a hydrocolloid, preferably welan gum, is uniformly dispersed in a superplasticizer such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and m... | 04/24/2001 |
| 6213213 | Methods and viscosified compositions for treating wells The present invention relates to methods of treating subterranean formations with viscosified aqueous well treating compositions which break into thin fluids at static temperatures in the range of from about 150° F. to about 200° F. A breaker system is ... | 04/10/2001 |
| 6060434 | Oil based compositions for sealing subterranean zones and methods The present invention provides oil based compositions and methods of using the compositions for sealing subterranean zones. The compositions are basically comprised of oil, a hydratable polymer, an organophillic clay and a water-swellable clay.... | 05/09/2000 |
| 6040276 | Process and water-base fluid utilizing hydrophobically modified cellulose derivatives as filtrate reducers The present invention relates to a process used in a well for controlling the filtration of a drilling, a completion or a workover fluid set in a well. The process comprises adding a predetermined amount of at least one hydrophobically modified cellulose ... | 03/21/2000 |
| 5981447 | Method and composition for controlling fluid loss in high permeability hydrocarbon bearing formations A chemical system and method to stop or minimize fluid loss during completion of wells penetrating hydrocarbon formations are provided. The inventions relates to formulating a highly stable crosslinked hydroxyethyl cellulose (HEC), control released viscos... | 11/09/1999 |
| 5968879 | Polymeric well completion and remedial compositions and methods Polymeric well completion and remedial compositions which form highly pliable impermeable masses of desired rigidity and methods of using the compositions are provided. The compositions are basically comprised of water, a water soluble polymerizable monom... | 10/19/1999 |
| 5950731 | Methods and compositions for breaking viscosified fluids The present invention relates to methods of treating subterranean formations and viscosified aqueous well treating compositions which break into thin fluids at temperatures in the range of from about 100° F., to about 300° F. A breaker system is include... | 09/14/1999 |
| 5849674 | Compositions and processes for oil field applications A composition and a process for treating a subterranean formation are disclosed. The process comprises injecting into the subterranean formation a composition which comprises a polymer, a crosslinking agent, a liquid, optionally a clay, and further option... | 12/15/1998 |
