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| Number | Title | Issue Date |
| 7395863 | Method of treating a subterranean formation with an oil-based composition containing a polysaccharide-based water-superabsorbent material A well treating composition containing a polysaccharide-based water-superabsorbent material has particularly applicability as a thermal insulating, fracturing or acid stimulation fluid. The water-superabsorbent material is capable of absorbing, at a minimum, its own... | 07/08/2008 |
| 7387985 | Monovalent cation-containing well fluids A monovalent cation containing well fluid composed of an aqueous brine containing at least 0.6 equivalents per liter of a water soluble monovalent cation salt, is substantially free of divalent cations, and an amount of a starch derivative selected such that the wel... | 06/17/2008 |
| 7347263 | Networked polymeric gels and use of such polymeric gels in hydrocarbon recovery A composition includes water having a salinity of at least 1 ppt, at least one hydrophilic polymer containing primary (—NH2) and/or secondary (—NHR) amine groups and at least one saccharide containing a reducible function. A method of changing the per... | 03/25/2008 |
| 7343976 | Methods of treating subterranean formations using derivatized gelling agents One embodiment of the present invention provides methods of treating a subterranean formation with a viscosified treatment fluid comprising combining water, a carbonyl-containing first compound, and an amine-containing second compound; wherein the carbonyl-containin... | 03/18/2008 |
| 7306039 | Methods of using crosslinkable compositions A thermal insulating packer fluid contains water and/or brine, a crosslinkable viscosifying polymer, a crosslinking agent and an optional set retarder. The composition is capable of inhibiting unwanted heat loss from production tubing or uncontrolled heat transfer t... | 12/11/2007 |
| 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 |
| 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 |
| 7208529 | Aminocarboxylic acid breaker compositions for fracturing fluids It has been discovered that aminocarboxylic acids are effective breakers for polymer-gelled aqueous fracturing fluids, particularly in the temperature range between about 120° F. (49° C.) and about 280° F. (138° C.). The aminocarboxylic acids are believed to act... | 04/24/2007 |
| 7128148 | Well treatment fluid and methods for blocking permeability of a subterranean zone The present invention provides a method and treatment fluid for blocking the permeability of an elevated-temperature zone in a reservoir of a subterranean formation penetrated by a wellbore, the method comprising the steps of: a) selecting the zone to be treated, wh... | 10/31/2006 |
| 7090015 | Methods of treating subterranean zones and viscous aqueous fluids containing xanthan and a combination cross-linker—breaker Methods of treating subterranean zones and viscous aqueous fluids containing xanthan biopolymer gelling agent and a combination crosslinker and delayed breaker are provided. A viscous cross-linked aqueous treating fluid of the invention comprises water, a xanthan po... | 08/15/2006 |
| 7091160 | Methods and compositions for reducing subterranean formation permeabilities Methods and compositions for reducing the permeabilities of subterranean formations or zones are provided. The methods of the invention are basically comprised of introducing an aqueous composition into the formation or zone comprised of water, a water soluble organ... | 08/15/2006 |
| 7084096 | Suspension of borates in non-aqueous solvents and use thereof A non-aqueous suspension including boron-containing particulates, a low molecular weight polyalkylene glycol and a suspension stabilizer is provided. Methods of crosslinking water soluble polymers and of fracturing a subterranean formation are also provided. ... | 08/01/2006 |
| 7078370 | Biodegradable chelant compositions for fracturing fluid It has been discovered that biodegradable and non-toxic chelant compositions can perform multiple beneficial functions in an aqueous fracturing fluid through the chelation of ions. Some of the multiple functions include various combinations of the following: demulsi... | 07/18/2006 |
| 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 polysaccharide polymers are galactomannan gums or derivatives thereo... | 03/28/2006 |
| 7012044 | Oil and gas recovery from subterranean formations Methods are provided for fracturing subterranean formations using fluids having substantially reduced polymer loadings that have performance equivalent to conventional fluids. Reduced polymer loadings provide significant advantages such as reduced treatment costs an... | 03/14/2006 |
| 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 |
| 6997259 | Methods for forming a permeable and stable mass in a subterranean formation The present invention relates to increasing the permeability of a subterranean formation by forming a resinous mass having conductive channels through which fluids can be produced in the formation. Some embodiments of the present invention provide methods of creatin... | 02/14/2006 |
| 6986391 | Methods of fracturing subterranean zones penetrated by well bores and fracturing fluids therefor The present invention provides improved methods of fracturing subterranean zones penetrated by well bores and improved fracturing fluids. The fracturing fluids are basically comprised of water, a terpolymer of 2-acrylamido-2-methylpropane sulfonic acid, acrylamide a... | 01/17/2006 |
| 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, and an optional reinforcing material, preferably of fibers and/or commi... | 09/06/2005 |
| 6936574 | Process for controlling gas migration during well cementing The present invention provides a cement composition and a process for using the cement composition to inhibit gas migration from a subterranean zone into the cement. The process comprises displacing a gelling additive, preferably comprised within a cement compositio... | 08/30/2005 |
| 6936575 | Borate crosslinker suspensions with more consistent crosslink times The invention provides an aqueous suspension/concentrate of a sparingly soluble borate, preferably as disclosed in Mondshine U.S. Pat. No. 4,619,776, which is effective in crosslinking aqueous solutions of a water soluble, borate-crosslinkable polymer, preferably gu... | 08/30/2005 |
| 6932158 | Well plug additive, well plug treatment fluid made therefrom, and method of plugging a well For well plug treatment to plug an abandoned well, a well plug additive including a dry mixture of water soluble crosslinkable polymer, a crosslinking agent, and filter aid, and optionally, a reinforcing material preferably of fibers and/or comminuted plant material... | 08/23/2005 |
| 6911419 | 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-linked fracturin... | 06/28/2005 |
| 6867170 | 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, and a reinforcing material of fibers and/or comminuted plant materials. The method of... | 03/15/2005 |
| 6855672 | Copolymers useful for gelling acids Disclosed is a copolymer useful for preparing acid gels comprising a copolymer having a copolymer backbone, the copolymer having a general formula: wherein: (a) A is an H or other terminating group; (b) R1 i... | 02/15/2005 |
| 6848519 | Methods of forming a chemical casing Methods of forming chemical casings include drilling a well bore with a drilling fluid having a pH in the range of from about 6 to 10 and comprising water, a water soluble or water dispersible polymer which is capable of being cross-linked by a thermoset resin and c... | 02/01/2005 |
| 6844296 | Fracturing fluids and methods of making and using same Fracturing fluid compositions and methods for their preparation and use are disclosed. The compositions are useful in the oil and gas drilling operations, as well as in gravel packing operations, water blocking, temporary plugging for purposes of wellbore isolation ... | 01/18/2005 |
| 6837316 | Methods of consolidating formations Methods of consolidating formations include drilling a well bore with a drilling fluid that comprises water, a polymeric cationic catalyst which is adsorbed on minerals and rocks in weak unconsolidated zones or formations and then further contacting the unconsolidat... | 01/04/2005 |
| 6823940 | Methods of consolidating formations and forming a chemical casing Methods of consolidating unconsolidated weak zones or formations and forming chemical casings include drilling a well bore with a drilling fluid having a pH in the range of from about 6 to 10 and that comprises water, a polymeric cationic catalyst which is adsorbed ... | 11/30/2004 |
| 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 |
| 6820694 | Method for preparing improved high temperature fracturing fluids The present invention related to a method for fracturing subterranean formations including the steps of (a) providing a water source; (b) adding a crosslinking agent to said water source; (c) adding a polymeric component to said water to create a fracturing fluid; (... | 11/23/2004 |
| 6818598 | Shear-sensitive plugging fluid for plugging and a method for plugging a subterranean formation zone A plugging fluid for plugging a subterranean formation zone surrounding a drill hole comprises an emulsion comprising a dispersed aqueous phase containing an aqueous base and a continuous hydrophobic phase containing a polymer consisting of a grafted cellulose ether... | 11/16/2004 |
| 6814145 | Shear-sensitive plugging fluid for plugging and a method for plugging a subterranean formation zone A plugging fluid for plugging a subterranean formation zone surrounding a drill hole comprises an emulsion comprising a dispersed aqueous phase containing an aqueous base and a continuous hydrophobic phase containing a polymer consisting of a grafted cellulose ether... | 11/09/2004 |
| 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 |
| 6794340 | Method for removing drill cuttings from wellbores and drilling fluids A method is disclosed for drilling a wellbore employing a drilling fluid providing the advantages of easy pumpability of a low viscosity fluid with the drill cuttings suspension capability of a highly viscous fluid. The viscosity of the fluid is also easily and quic... | 09/21/2004 |
| 6756345 | Well service composition and method A well service fluid composition comprises a fracturing fluid and a gas hydrate inhibitor. Preferably, the gas hydrate inhibitor does not affect the function of the fracturing fluid and is present in an amount sufficient to control and/or minimize the formation of g... | 06/29/2004 |
| 6750179 | Well plug additive, well plug treatment fluid made therefrom, and method of plugging a well For well plug treatment to plug an abandoned well, a well plug additive including a dry mixture of water soluble crosslinkable polymer, a crosslinking agent, and a reinforcing material of fibers and/or comminuted plant materials. The method of forming a well plug fl... | 06/15/2004 |
| 6734146 | Foamed fracturing fluids, additives and methods of fracturing subterranean zones The present invention provides environmentally safe foamed fracturing fluids, additives for foaming and stabilizing foamed fracturing fluids and methods of fracturing subterranean zones. The foamed fracturing fluids of this invention are basically comprised of water... | 05/11/2004 |
| 6716798 | Conformance improvement additive, conformance treatment fluid made therefrom, method of improving conformance in a subterranean formation For conformance treatment to plug an opening in subterranean hydrocarbon bearing formation, a conformance additive including a dry mixture of water soluble crosslinkable polymer, a crosslinking agent, and a reinforcing material of fibers and/or comminuted plant mate... | 04/06/2004 |
