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| Number | Title | Issue Date |
| 5217074 | Method of fracturing formations Granules containing a gel breaker are used in a well treatment involving the use of a gelled fluid. The granules exhibit delayed release of the breaker to permit placement of the gelled fluid into the subterranean formation.... | 06/08/1993 |
| 5151203 | Composition and method for cementing a well A composition for and method of performing primary cementing operations is disclosed. The method comprises the use of a water slurry of a thixotropic cementing composition which rapidly develops sufficient static gel strength to reduce if not eliminate an... | 09/29/1992 |
| 5120455 | Hydraulic fracturing propping agent A high strength propping agent for use in hydraulic fracturing of subterranean formations comprising solid, spherical particles having an alumina content of between 40 and 60%, a density of less than 3.0 gm/cc and an ambient temperature permeability of 10... | 06/09/1992 |
| 4990028 | Anti-friction composition containing MgO and method Magnesium oxide is included in a bentonite clay anti-friction composition in an amount of 0.025-0.25% based on the dry weight of the clay to substantially improve the efficiency of underground cable or pipe installation. The anti-friction composition is a... | 02/05/1991 |
| 4923714 | Novolac coated ceramic particulate Ceramic particulates useful as a proppant in hydraulic fracturing and in gravel packing operations is provided which comprises a ceramic (sometimes vitreous) core surrounded by an epoxy resin coating. Novolac epoxy resin compounds without any substantial ... | 05/08/1990 |
| 4894285 | Sintered spherical pellets containing clay as a major component useful for gas and oil well proppants Sintered, spherical composite pellets or particles comprising one or more clays as a major component and bauxite, alumina, or mixtures thereof, are described, along with the process for their manufacture. The pellets may have an alumina-silica (Al2 | 01/16/1990 |
| 4888120 | Water-based drilling and well-servicing fluids with swellable, synthetic layer silicates Synthetic swellable layer silicates corresponding to the following formula MgO.aMA.bAl2 O3.cSiO.sub.2.nH.sub.2 O (I) in which M is Na+ and Li+ having an Na:Li ratio of at least 1; A is F-, OH- ... | 12/19/1989 |
| 4879181 | Sintered spherical pellets containing clay as a major component useful for gas and oil well proppants Sintered, spherical composite pellets or particles comprising one or more clays as a major component and bauxite, alumina, or mixtures thereof, are described, along with the process for their manufacture. The pellets may have an alumina-silica (Al2 | 11/07/1989 |
| 4877542 | Thermal insulating fluid A thermal insulating fluid which is well suited for the insulation of steam injection wells comprises a heavy oil having an API gravity of not more than 15° and a water content of not more than about 5% by volume as a major liquid portion, a light oil as... | 10/31/1989 |
| 4871022 | Method for removing polymer plugging in well boreholes A method of removing polymeric material from injection and producing wells in which an aqueous medium containing, chlorine dioxide or sodium chlorite is introduced into the well and maintained in contact with the polymeric material for a period of time su... | 10/03/1989 |
| 4871024 | Fluid for treatment of a subterranean well for enhancement of production An acid soluble copper metal salt intensifier is provided for a fluid for treatment of a subterranean well for enhancement of production within the well by introduction of the fluid through a high alloy steel member positioned within the well. The treatme... | 10/03/1989 |
| 4680230 | Particulate ceramic useful as a proppant A two-phase ceramic particulate useful as a proppant in hydraulic fracturing operations is provided which comprises a vitreous matrix phase containing a crystalline alumina phase. The new ceramic particles are characterized by: (i) a concentration gradien... | 07/14/1987 |
| 4664819 | Proppant charge and method A pre-cured proppant charge useful, for example, for propping a fracture in a subterranean formation is disclosed. The charge is made up of a large number of particles composed of a single substrate particle which can be silica sand, glass beads, or the l... | 05/12/1987 |
| 4647385 | Reduction of viscosity of aqueous fluids The viscosity of thickened aqueous solutions of water-soluble polymers is reduced by the addition of alkali metal and alkaline earth metal salts of hypochlorous acid and tertiary amines. The combination of the salt and the tertiary amine is much more effi... | 03/03/1987 |
| 4634540 | Composition and method for modifying and augmenting recovery of hydrocarbons from hydrocarbon-bearing formations A process and composition for modifying hydrocarbons and/or recovering hydrocarbons from hydrocarbon-bearing formations involving mixing controlled quantities of alkali metal hydroxide and silicon in an aqueous medium to produce an oil modification agent.... | 01/06/1987 |
| 4564459 | Proppant charge and method A pre-cured proppant charge useful, for example, for propping a fracture in a subterranean formation is disclosed. The charge is made up of a large number of particles composed of a single substrate particle which can be silica sand, glass beads, or the l... | 01/14/1986 |
| 4522731 | Hydraulic fracturing propping agent A high strength propping agent for use in hydraulic fracturing of subterranean formations comprising solid, spherical particles having an alumina content of between 40 and 60%, a density of less than 3.0 gm/cc and an ambient temperature permeability of 10... | 06/11/1985 |
| 4519922 | Environmentally compatible high density drill mud or blow-out control fluid An environmentally compatible high density drilling or blow-out control fluid is provided wherein densities between twenty-four (24) and forty (40) pounds per gallon can be achieved. Such preferred fluid is aqueous based, uses a non-toxic gelling agent su... | 05/28/1985 |
| 4443347 | Proppant charge and method A method is provided for propping a fracture in a subterranean formation which comprises injecting into a subterranean well a suspension in a carrier fluid of a pre-cured proppant charge, the pre-cured proppant charge being pre-cured prior to injection in... | 04/17/1984 |
| 4417989 | Propping agent for fracturing fluids Hydrocarbons are recovered from a subterranean hydrocarbon-bearing formation penetrated by an injection well and a production well by displacing hydrocarbons toward the production well using a drive fluid such as water thickened with polyacrylamide or par... | 11/29/1983 |
| 4337160 | Acid soluble weighting agent for well drilling, workover and completion fluids A new weighting material for use in controlling the specific gravity of fluids employed in the drilling, completion, perforation and workover of oil and gas wells is disclosed. The material siderite (FeCO3), has the unique property of being rem... | 06/29/1982 |
| 4304300 | Method of using gelled aqueous well treating fluids Gelled aqueous fluids, solid blends for forming such fluids and methods of using the fluids for treating wells are provided. The gelled fluids are stable over a broad temperature range and are comprised of water, a first hydratable polymer for increasing ... | 12/08/1981 |
| 4217146 | Plugging fluid A plugging fluid on the basis of a hydrocarbon liquid and a weighting material, wherein said weighting material is titanium dioxide, the afore-listed components being taken in the following amounts in percent by weight: hydrocarbon liquid: 60 to 80 titani... | 08/12/1980 |
| 4190110 | Method of cementing wellbores using high temperature cement mud spacer A spacer composition for use in borehole cementing operations is disclosed which has excellent high temperature stability and compatability with cement slurries and drilling fluids. The spacer composition comprises a single phase water base system contain... | 02/26/1980 |
| 3998270 | Oil recovery by waterflooding employing graphite oxide for mobility control A method for the recovery of oil from an oil-containing subterranean formation by waterflooding employing as an injection medium an aqueous dispersion of a hydrophilic carbon oxide. According to a preferred form of the invention, particulate graphite oxid... | 12/21/1976 |
| 3998744 | Oil fracturing spacing agents Oil-soluble spacing agents for use in fracturing underground oil or gas formations comprising polymerized dimethyl-alpha-methylstyrenes.... | 12/21/1976 |
