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| Number | Title | Issue Date |
| 8034750 | Borozirconate systems in completion systems A cross-linking system for hydratable polymers for using is formation fracturing applications is disclosed along with methods for using same, where the cross-linking system includes a reaction product of a transition metal alkoxide or alkanolate and a borate or bora... | 10/11/2011 |
| 7795190 | Process to prepare borozirconate solution and use as a cross-linker in hydraulic fracturing fluids A process to prepare a stable solution of a borozirconate complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting zirconium complex with alkanolamine, then ... | 09/14/2010 |
| 7790657 | Process to prepare borozirconate solution and use a cross-linker in hydraulic fracturing fluids A process to prepare a stable solution of a borozirconate complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting zirconium complex with a first alkanolamin... | 09/07/2010 |
| 7683011 | Process to prepare borozirconate solution and use as cross-linker in hydraulic fracturing fluids A process to prepare a stable solution of a borozirconate complex is disclosed and use of the solution in oil field applications such as hydraulic fracturing and plugging of permeable zones. The process comprises contacting zirconium complex with a first alkanolamin... | 03/23/2010 |
| 7405183 | Methods and compositions for crosslinking polymers with boronic acids The present invention provides a method of forming a viscosified treatment fluid comprising: providing a treatment fluid that comprises water and a gelling agent; contacting the treatment fluid with a boronic acid crosslinking agent so as to form a crosslinked gelli... | 07/29/2008 |
| 7380601 | Degradable fiber systems for stimulation A method for minimizing the amount of metal crosslinked viscosifier necessary for treating a wellbore with proppant or gravel is given. The method includes using fibers to aid in transporting, suspending and placing proppant or gravel in viscous carrier fluids other... | 06/03/2008 |
| 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 water-superabsorbent material is capable of absorbing, at a minimum, its own... | 01/08/2008 |
| 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 |
| 7303014 | Casing strings and methods of using such strings in subterranean cementing operations Improved casing strings, and methods of using improved casing strings in subterranean cementing operations, are provided. An example of an apparatus is a pipe string comprising at least one pipe section and a delivery system of an activator. Another example of an ap... | 12/04/2007 |
| 7297665 | Fluids comprising zirconium isopropylamine crosslinking agents and associated methods Treatment fluids that may comprise an aqueous fluid, a gelling agent, and a zirconium triisopropylamine crosslinking agent are provided. Also provided are crosslinking agents that may comprise a zirconium triisopropylamine crosslinking agent, and a zirconium IV-cont... | 11/20/2007 |
| 7275596 | Method of using degradable fiber systems for stimulation A method for minimizing the amount of metal crosslinked viscosifier necessary for treating a wellbore with proppant or gravel is given. The method includes using fibers to aid in transporting, suspending and placing proppant or gravel in viscous carrier fluids other... | 10/02/2007 |
| 7276634 | Reduction of the viscosity of reactive heavy byproducts during the production of 1,3-propanediol The present invention is an improvement upon the process for the production of 1,3-propanediol wherein an aqueous solution of 3-hydroxy propanal is formed, catalyst, if any, used in said formation is removed from the solution, sodium hydroxide is added to the soluti... | 10/02/2007 |
| 7268101 | Formate based liquid gel concentrates A liquid gel concentrate for forming a high viscosity treating fluid is provided which can be premixed and stored before being used. The concentrate is comprised of an aqueous formate solution, at least one hydratable polymer which yields viscosity upon hydration an... | 09/11/2007 |
| 7268100 | Shale inhibition additive for oil/gas down hole fluids and methods for making and using same An under-balanced drilling fluid additive is disclosed which reduces reactive shale and/or clay swelling during under-balanced drilling operations, where the additive includes an effective amount of a choline salt. A method for under-balanced drilling is also disclo... | 09/11/2007 |
| 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 |
| 7256160 | Fracturing fluids for delayed flow back operations It has been discovered that certain fracturing fluid compositions can be used to fracture a subterranean formation and be permitted to stay within the formation for a relatively extended period of time, for example 28 days or more, before being flowed back or produc... | 08/14/2007 |
| 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 |
| 7199084 | Concentrated suspensions Suspensions are provided of water-soluble materials in non-aqueous carrier fluids using suspension agents that include thixotropic agents and, optionally, organophilic clays. Methods of forming such suspensions are provided. Methods are also provided for using such ... | 04/03/2007 |
| 7195065 | Stabilizing crosslinked polymer guars and modified guar derivatives An aqueous, viscoelastic treating fluid gelled with a crosslinked guar or guar derivative is stabilized and improved with an effective amount of a glycol, such as ethylene glycol. These fluids are more stable in that viscosity is maintained, particularly at elevated... | 03/27/2007 |
| 7192908 | Composition and method for treating a subterranean formation An aqueous oilfield treatment fluid containing a chelating agent and an HF source is described. This fluid is effective at dissolving siliceous materials such as clays and keeping the dissolved materials in solution. In particular it is effective at preventing re-pr... | 03/20/2007 |
| 7178596 | Methods for improving proppant pack permeability and fracture conductivity in a subterranean well The present invention provides compositions and methods for enhancing subterranean well productivity by enhancing fracture conductivity. A method of increasing the conductivity of a fracture in a portion of a subterranean formation comprising providing a slurry comp... | 02/20/2007 |
| 7159658 | Methods and compositions for treating subterranean zones Methods and compositions for breaking treatment fluids utilized in the stimulation of a subterranean formation. ... | 01/09/2007 |
| 7096944 | Well fluids and methods of use in subterranean formations The present invention relates to improved well fluids that include hollow particles, and to methods of using such improved well fluids in subterranean cementing operations. The present invention provides methods of cementing, methods of reducing annular pressure, an... | 08/29/2006 |
| 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 |
| 7067459 | Well stimulation compositions 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... | 06/27/2006 |
| 7044220 | Compositions and methods for improving proppant pack permeability and fracture conductivity in a subterranean well The present invention relates to enhancing fluid flow from subterranean formations. More particularly, this invention relates to providing improved proppant matrixes within fractures in a subterranean formation. An example of the methods of increasing the conductivi... | 05/16/2006 |
| 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 |
| 7032663 | Permeable cement and sand control methods utilizing permeable cement in subterranean well bores This invention relates to improved methods for completing wells in unconsolidated subterranean zones. More specifically, the present invention relates to cement compositions useful in subterranean applications, and more particularly, to permeable cement compositions... | 04/25/2006 |
| 7021379 | Methods and compositions for enhancing consolidation strength of proppant in subterranean fractures Improved methods and compositions for consolidating proppant in fractures formed in subterranean zones are provided. An improvement of this invention comprises using proppant particles having a coating of hardenable resin including a gel breaker. The gel breaker fac... | 04/04/2006 |
| 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 |
| 7007757 | Fracturing fluids containing borate esters as crosslinking agents and method of using same A formation treating fluid comprises one or more borate esters, a liquid carrier and, one or more cross linkable polymer wherein the formation treating fluid has an alkaline pH when the formation treating fluid is positioned in a formation. The formation treating fl... | 03/07/2006 |
| 7000702 | Environmentally benign viscous well treating fluids and methods Environmentally safe viscous well treating fluids and methods are provided by the present invention. The treating fluids are basically comprised of water, a viscosity producing polymer, a boron cross-linking agent for cross-linking the polymer, and a delayed cross-l... | 02/21/2006 |
| 6976538 | Methods and high density viscous salt water fluids for treating subterranean zones Methods of treating subterranean zones and high density viscous aqueous treating fluids are provided. A high density viscous aqueous treating fluid of the invention comprises salt water comprising water and one or more oxidation resistant salts; a gelling agent; and... | 12/20/2005 |
| 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 |
| 6924255 | Composition and method for treating a subterranean formation Aqueous liquid compositions for increasing the permeability of a subterranean formation are disclosed, the compositions being characterized by provision of fluoborate anion (fluoboric acid) and a specified compound or compounds, or mixture thereof, which chelate alu... | 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 |
| 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 |
| 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 |
