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| Number | Title | Issue Date |
| 7490444 | Building element The invention relates to a building element for erecting internal walls, outer walls and or ceilings or roofs, preferably flat or slightly slanted roofs of a building, consisting of an insulating layer forming an insulating core made of mineral fibers bound by a bin... | 02/17/2009 |
| 7485185 | Cementing compositions containing substantially spherical zeolite A cementitious composition for cementing an oil or gas well and which exhibits when cured, increased flexural strength and a flexural strength to compressive strength ratio between from about 0.29 to about 0.80, contains a hydraulically-active cementitious material,... | 02/03/2009 |
| 7481273 | Method of using water-in-oil emulsion to remove oil base or synthetic oil base filter cake Fluid producing or injecting wells may be treated with a water-in-oil emulsion for the removal or inhibition of unwanted particulates, including pipe dope, asphaltenes and paraffins. In addition, such emulsions are effective in the displacement of oil base drilling ... | 01/27/2009 |
| 7481276 | Method of inhibiting and/or preventing corrosion in oilfield treatment applications Corrosive effects arising during oilfield treatment applications are inhibited and/or prevented by introducing into an oil or gas well at least one compound of formula I: wherein: R1 ... | 01/27/2009 |
| 7478794 | Apparatus and methods for gripping an elongated item In some embodiments, apparatus for releasably gripping at least one elongated item and being used in pulling the elongated item(s) through at least one space includes a body and a plurality of gripping members associated with the body. The gripping members are movea... | 01/20/2009 |
| 7475730 | Method of treating well with foamed composition The annular surface between the tubing and casing of an oil or gas well may be contacted with a foamed well treatment composition containing a gas, a foaming agent and a liquid well treatment agent, such as a scale inhibitor, corrosion inhibitor, salt inhibitor, sca... | 01/13/2009 |
| 7472751 | Method of treating subterranean formations using mixed density proppants or sequential proppant stages An increase in effective propped lengths is evidenced in hydraulic fracturing treatments by the use of ultra lightweight (ULW) proppants. The ULW proppants have a density less than or equal to 2.45 g/cc and may be used as a mixture in a first proppant stage wherein ... | 01/06/2009 |
| 7455111 | Compositions for treating a well penetrating a subterranean formation and uses thereof Fluid producing wells may be treated with a water-in-oil emulsion for the removal or inhibition of unwanted solid particulates, including pipe dope, asphaltenes and paraffins. Such emulsions are of particular applicability in the displacement of oil base drilling mu... | 11/25/2008 |
| 7448449 | Strength retrogression preventer Cementitious slurries capable of controlling and/or preventing strength retrogression during the cementing of a formation contain a bismuth salt or derivative thereof. Bismuth trioxide is preferred. The cementitious slurry may further contain a density modifying age... | 11/11/2008 |
| 7441609 | Method of decreasing the disintegration of shale-containing cuttings and drilling fluid therefor The invention provides a method of enhancing the recovery of shale-containing cuttings during the drilling of a borehole in a shale-containing subterranean formation which comprises adding to the drilling fluid circulating in the borehole a finely ground, very spari... | 10/28/2008 |
| 7426961 | Method of treating subterranean formations with porous particulate materials Methods and compositions useful for subterranean formation treatments, such as hydraulic fracturing treatments and sand control that include porous materials. Such porous materials may be selectively configured porous material particles manufactured and/or treated w... | 09/23/2008 |
| 7410608 | Methods for manufacturing a diaphragm for an air admittance valve In some embodiments, a process for manufacturing a diaphragm for an air admittance valve includes disposing a first center disk into a first cavity of a first mold, the first center disk includes a hollow stem. A material is provided into the first mold, through the... | 08/12/2008 |
| 7398824 | Method for inhibiting or controlling inorganic scale formations with copolymers of acrylamide and quaternary ammonium salts A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. Suitable copolymers include those comprising an acrylamide unit and a quaternary ammonium salt group, and optionally an acrylate... | 07/15/2008 |
| 7395835 | Air admittance valve In some embodiments, an air admittance valve includes a base, a screen plate and a diaphragm engageable with the screen plate. The diaphragm may include a first center disk having a stem and a membrane coupled to the first center disk. The membrane may have a contin... | 07/08/2008 |
| 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 |
| 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 particularly effective in breaking-down the interfacial rheological pro... | 07/01/2008 |
| 7392844 | Method of treating an oil or gas well with biodegradable low toxicity fluid system A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a fatty acid ester, such as methyl soyate. The fluid system may further contain a lactic acid ester, such as ethyl lactate, and/or a nonionic surfactant. Th... | 07/01/2008 |
| 7347265 | Method of forming temporary blocking gel containing guar derivative A high temperature blocking gel contains a blend of an aqueous fluid and carboxymethyl guar and a crosslinking agent. The gel exhibits excellent hydration capability in brines and positive viscosity generation and controls fluid loss from an oil well during drilling... | 03/25/2008 |
| 7348484 | Method of assisting a compromised barrier The present invention provides method, apparatus, and system to assist in partially or fully reestablishing the fire rating of a barrier that has been compromised by the installation of an electrical box(es) in the barrier. The electrical box includes a faceplate ha... | 03/25/2008 |
| 7322411 | Method of stimulating oil and gas wells using deformable proppants A method of fracturing using deformable proppants minimizes proppant pack damage, without compromising the fracturing fluid's proppant transport properties during pumping, by use of deformable proppants. Selection of proppant is dependent upon the mechanical propert... | 01/29/2008 |
| 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 |
| 7303018 | Method of acidizing a subterranean formation with diverting foam or fluid A method of acidizing a subterranean formation with a diverting agent composed of a gelled or thickened viscoelastic foam or fluid generated from (i.) an amidoamine oxide gelling agent and (ii.) an acid or foam, water and/or brine. The gelled or thickened foam or fl... | 12/04/2007 |
| 7273188 | Internal self-rotating fluid jetting nozzle An embodiment of an internal self-rotating fluid nozzle includes a rotor rotatably moveable within a nozzle body cavity. The rotor may include a jewel holder that carries at least one jewel member and spins against a rotor seat disposed near the front of the cavity.... | 09/25/2007 |
| 7270180 | Scaling inhibitors and method for using the same in high density brines A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. The formulation has particular application in the removal of zinc sulfide and iron sulfide scales formed when zinc bromide brine... | 09/18/2007 |
| 7264786 | Method of scavenging hydrogen sulfide and/or mercaptans from fluid and gas streams Hydrogen sulfide and mercaptans may be removed from a fluid or gaseous stream by reacting the hydrogen sulfide and mercaptans in the stream with a scavenger selected from a: (i.) 1,3,5-trisalkanylamino hexahydro-1,3,5-triazine deri... | 09/04/2007 |
| 7246789 | Cable clamping apparatus and method An embodiment of the invention involves a method for engaging an elongated item, such as a wire or cable, to allow it to be pulled through a path, such as in a conduit, and includes gripping the elongated item with multiple teeth. ... | 07/24/2007 |
| 7231976 | Method of treating an oil or gas well with biodegradable low toxicity fluid system A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a blend of lactic acid ester, such as ethyl lactate, and a fatty acid ester, such as methyl soyate. The fluid system may be further in the form of a microem... | 06/19/2007 |
| 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 permeability or undamaged portion of a formation. The fluid preferably forms ... | 05/22/2007 |
| 7210528 | Method of treatment subterranean formations using multiple proppant stages or mixed proppants An increase in effective propped lengths is evidenced in hydraulic fracturing treatments by the use of ultra lightweight (ULW) proppants. The ULW proppants have a density less than or equal to 2.45 g/cc and may be used as a mixture in a first proppant stage wherein ... | 05/01/2007 |
| 7207386 | Method of hydraulic fracturing to reduce unwanted water production A method of hydraulically fracturing a hydrocarbon-bearing subterranean formation ensures that the conductivity of water inflow below the productive zone of the subterranean formation is reduced. The method consists of two principal steps. In the first step, a fract... | 04/24/2007 |
| 7205264 | Well treatment method using fluid containing lactic acid or salt thereof Fluids comprising an aqueous acid, synthetic polymer, metal crosslinking agent and lactic acid or a salt thereof have particular applicability in fracturing subterranean formations of an oil or gas well. The lactic acid acts as a delaying agent. As a result, crossli... | 04/17/2007 |
| 7188676 | Method for displacing oil base drilling muds and/or residues from oil base drilling mud using water-in-oil emulsion Fluid producing wells may be treated with a water-in-oil emulsion for the removal or inhibition of unwanted solid particulates, including pipe dope, asphaltenes and paraffins. Such emulsions are of particular applicability in the displacement of oil base drilling mu... | 03/13/2007 |
| 7159655 | Method for inhibiting or controlling inorganic scale formations A formulation containing a copolymer derived from a cationic monomer effectively inhibits and controls the formation of inorganic scales. The formulation has particular application in the removal of zinc sulfide and iron sulfide scales formed when zinc bromide brine... | 01/09/2007 |
| 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 |
| 7144512 | Method of reclaiming brine solutions using an organic chelant A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group —CO2 | 12/05/2006 |
| 7144844 | Method of using viscoelastic vesicular fluids to enhance productivity of formations A process for enhancing the productivity of a formation consists of introducing into the formation a viscoelastic fluid which contains at least one surfactant, at least one quaternary amine polyelectrolyte, water, and a non-aqueous solvent. The surfactant forms aggr... | 12/05/2006 |
| 7137448 | Method of cementing a well using composition containing zeolite A cementitious composition for cementing an oil or gas well and which exhibits, when cured, increased flexural strength and a flexural strength to compressive strength ratio between from about 0.29 to about 0.80, contains a hydraulically-active cementitious material... | 11/21/2006 |
| 7128306 | Cable clamping apparatus and method An embodiment of the invention involves a device for clamping and pulling an elongated item, such as a wire or cable, through a path, such as in a conduit, and includes a main body having a bore and multiple teeth capable of gripping the elongated item. ... | 10/31/2006 |
| 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 |
