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| Number | Title | Issue Date |
| 4703797 | Sweep improvement in enhanced oil recovery A method for sweep improvement during enhanced oil recovery in a subterranean oil-bearing formation concerns the generation of foam by the dispersion of the displacing fluid in an aqueous solution of a mixed surfactant system. The mixed surfactant system ... | 11/03/1987 |
| 4501445 | Method of in-situ hydrogenation of carbonaceous material In-situ hydrogenation of an underground coal formation is carried out by fracturing the formation and sealing it, to provide an in-situ reactor site. Then a liquid solvent stream and a gaseous hydrogen stream are introduced into the fractured formation, a... | 02/26/1985 |
| 4463988 | Horizontal heated plane process A process for in situ recovery of a tar sand deposit located beneath the earth's surface. A number of boreholes are drilled laterally from subsurface tunnels into the lower portion of the tar sands formation. Initially as a displacing means such as steam ... | 08/07/1984 |
| 4452091 | Soil gas probe A purgable soil gas probe for removing small quantities of gases from the earth's soil to determine the presence of hydrocarbon deposits nearby. A removable evacuated container is attached to the upper end of the probe to withdraw soil gas through the pro... | 06/05/1984 |
| 4452234 | Collapsible mobile solar energy power source An apparatus for collecting solar energy and converting it to electrical energy utilizing solar panels pivotally mounted to a base such that the panels may be pivoted to a storage position inside said base. Additional solar panels may be pivotally mounted... | 06/05/1984 |
| 4444276 | Underground radial pipe network The network, useful in conducting fluids to underground sites, is an assembly of flexible pipes or tubes, suspended from and connected to a drill pipe. The flexible pipes, assembled in a bundle, are spring biased to flare outwardly in an arcuate manner wh... | 04/24/1984 |
| 4435518 | Polymerization catalyst Catalyst compositions which are particularly useful for the preparation of ethylene polymers having a narrow molecular weight distribution are obtained by (1) drying an inorganic oxide having surface hydroxyl groups, e.g., silica, alumina, magnesia, etc.,... | 03/06/1984 |
| 4435520 | Catalyst composition Vanadium compound/organometallic compound/inorganic oxide catalyst compositions useful for the polymerization of ethylene to polymers having an intermediate molecular weight distribution that can be predictably controlled by the use of a "tunable" variabl... | 03/06/1984 |
| 4435519 | Novel catalyst composition Vanadium compound/organometallic compound/inorganic oxide catalyst compositions useful for the polymerization of ethylene to polymers having a molecular weight distribution that can be controlled by selection of the appropriate member of a particular fami... | 03/06/1984 |
| 4434242 | Polymerization catalyst Catalyst compositions which are particularly useful for the preparation of ethylene polymers having a narrow molecular weight distribution are obtained by (1) drying an inorganic oxide having surface hydroxyl groups, e.g., silica, alumina, magnesia, etc.,... | 02/28/1984 |
| 4430457 | Cling/stretch wrap compositions A cling/stretch wrap film having desirable processing and end use characteristics is made from a composition of 90-97.5 wt. % an ethylene polymer having a melt flow value between 0.2 to 6.0 such as EVA copolymer (4-5 wt. % VA content) and 2.5-10 wt. % low... | 02/07/1984 |
| 4426317 | Process for making olefin polymerization catalyst Olefin polymerization catalysts of the type prepared by (1) drying an inorganic oxide, such as silica, having surface hydroxyl groups to remove adsorbed water, (2) slurrying the dried inorganic oxide in an inert liquid hydrocarbon, such as a hydrocarbon b... | 01/17/1984 |
| 4422317 | Apparatus and process for selectively expanding a tube An apparatus and process for selectively expanding the wall of a tube by compression and subsequent radial expansion of one or more elastomeric bars lodged within longitudinal slots of a bushing positioned inside the tube. Expansion of the elastomeric bar... | 12/27/1983 |
| 4420866 | Apparatus and process for selectively expanding to join one tube into another tube An apparatus and process for expanding a tube at selective points about its circumference to join with another tube. After a segment of a first tube is inserted into a second tube having an end sleeve segment with a larger diameter and wall thickness than... | 12/20/1983 |
| 4421943 | Collapsible mobile solar energy power source An apparatus for collecting solar energy and converting it to electrical energy utilizing solar panels pivotally mounted to a base such that the panels may be pivoted to a storage position inside said base. Additional solar panels may be pivotally mounted... | 12/20/1983 |
| 4418457 | Apparatus and process for expanding to join a tube into a tube sheet opening A process and apparatus for joining a tube into a tube sheet opening. After a tube is inserted into a tube sheet opening, compression and subsequent radial expansion of an elastomeric material inside the tube causes the elastomer to radially expand the tu... | 12/06/1983 |
| 4415034 | Electrode well completion The electrode of an electrode well is formed by inserting a heating device into the borehole and heating the surrounding formation to a temperature at which the hydrocarbon-containing material undergoes thermal cracking, resulting in a coke-like residue s... | 11/15/1983 |
| 4415431 | Integrated oxygasification and hydropyrolysis process for producing liquid and gaseous hydrocarbons Oxygen and steam are mixed with partially reacted carbonaceous material within a first stage gasification zone to produce synthesis gas. The hot synthesis gas long with additional carbonaceous material is then reacted in a second stage hydropyrolysis zone... | 11/15/1983 |
| 4412585 | Electrothermal process for recovering hydrocarbons In a pair of electrode wells to be developed for injection and production wells for the electrothermal process for recovering heavy hydrocarbons, the electrodes are formed by inserting a heating device in each borehole and heating the surrounding formatio... | 11/01/1983 |
| 4411871 | Apparatus for converting coal An apparatus, for the rapid heating and subsequent reaction of carbonaceous material and hydrogen, comprising a cylindrical reactor shell; a first inlet conduit, coaxial with the shell, terminating inside the shell and having the terminal discharge end co... | 10/25/1983 |
| 4406499 | Method of in situ bitumen recovery by percolation Bitumen is recovered from an underground tar sands (oil sands) formation by an in-situ percolation process. After drilling a borehole to the bottom of the tar sand formation, the hole is enlarged by radially hydraulic jetting, with the resultant slurry be... | 09/27/1983 |
| 4389388 | Desulfurization of petroleum coke Petroleum coke is processed to reduce the sulfur content. Ground coke is contacted with hot hydrogen, under pressurized conditions, for a residence time of about 2 to 60 seconds. The desulfurized coke is suitable for metallurgical or electrode uses.... | 06/21/1983 |
| 4374734 | Emulsion breaking of surfactant stabilized crude oil in water emulsions A process useful for breaking oil in water emulsions produced as the result of a surfactant flood oil recovery project is disclosed. The produced oil in water emulsion, stabilized with surfactants, content is treated with brine and a polyol or quaternary ... | 02/22/1983 |
| 4349734 | Flow detector for solids The invention concerns the flow and measurement of divided solids in small diameter tubes at high pressures. A flow channel is drilled through a metal block. A second channel is drilled so that the second channel intersects the first channel at a right an... | 09/14/1982 |
| 4325492 | Covered container A receptacle device comprising a tapered container having an opening and a cover pivotally attached to the opening in such a manner that the cover opens free of the opening so that a series of containers can be nested one within another without interferen... | 04/20/1982 |
| 4315709 | Apparatus for transporting the male ends of threaded tubing, pipe, or the like A process for protecting the threaded male end of tubing or the like in a drilling operation when, e.g., tubing is pulled from the ground comprising placing the male end of tubing in a transport means including a base on at least one rolling means and tra... | 02/16/1982 |
| 4303174 | Foot operated container and covering device A receptacle device useful for receiving material, comprising a container having an opening, a covering pivotally mounted on the opening, and a substantially U-shaped operating member straddling the container and having at least one end rotatably connecte... | 12/01/1981 |
| 4279026 | Seismographic data color display A new and improved method of forming a color graphic display from seismographic input data is disclosed. The input data sequence is processed to obtain the absolute value of each amplitude value and to select the maximum amplitude value of each oscillatio... | 07/14/1981 |
| 4264329 | Tracing flow of fluids A tracer system is disclosed which is especially useful for following fluid flow in underground reservoirs. Metal chelates, preferably derived from EDTA and containing a functional group which reacts with a fluorogenic agent, are used as tracers. Liquid c... | 04/28/1981 |
| 4261812 | Emulsion breaking process An oil-in-water emulsion of crude oil, water and surface active agents is broken by adding additional surface active agents, preferably relatively high equivalent weight petroleum sulfonates, to the emulsion and then subjecting the emulsion to conventiona... | 04/14/1981 |
| 4258223 | Process for the preparation of tertiary butyl alcohol A process for the recovery of isobutylene as tertiary butyl alcohol from a stream of C4 hydrocarbons comprising contacting the stream with an aqueous acid solution comprising from 50 to 80 wt % hydrocarbyl sulfonic acid, recovering from the res... | 03/24/1981 |
| 4256723 | Process for preparing precipitated red iron oxides A precipitated red iron oxide, having high crystallinity, low acicularity, unifrom particle size, and purity of color, is produced by aerating an alkaline mixture of copperas and soda ash to form seed crystals, increasing the temperature, adding additiona... | 03/17/1981 |
| 4232140 | Process for polymerizing olefins Trichlorofluoromethane is used as a promoter in the polymerization and copolymerization of ethylene with supported Ziegler-type vanadium compound/alkylaluminum compound catalysts in the presence of hydrogen. The use of the promoter leads to the formation ... | 11/04/1980 |
| 4230501 | Pigments dispersible in plastics The compositions comprise organic or inorganic pigments mixed with a combination of (a) waxy materials such as natural, synthetic, or petroleum waxes and (b) wax-like materials such as polyethylene glycols or hydrocarbon resins. These compositions are eas... | 10/28/1980 |
| 4222987 | Muffle calciner having counter-rotating screw conveyors The calciner is an elongated, insulated chamber, in which material is fed to counter-rotating screw conveyors. The material is calcined by heat radiating from a muffle plate interposed between the conveyors and gas-fired burners. This radiant heating, app... | 09/16/1980 |
| 4222790 | Calcination of ferrite tans An alkali metal silicate solution is added to a slurried mixture of yellow iron oxide monohydrate and zinc oxide (or magnesium oxide). After thorough mixing, and the mixture is filtered, dried, and calcined, giving a ferrite tan pigment.... | 09/16/1980 |
| 4221763 | Multi tube high pressure, high temperature reactor A high pressure, high temperature reactor device having a pair of spaced tube sheets for supporting a tube nest, one tube sheet being formed with a bellows to compensate for expansion and contraction of the tube nest longitudinally during temperature chan... | 09/09/1980 |
| 4221766 | Minimizing soluble iron concentration in a plant effluent This process reduces the soluble iron found in the final effluent of a plant making iron oxide by the Penniman-Zoph scrap process. The finished oxide product slurry is separated from the scrap iron, and the slurry is aerated while the pH is maintained bet... | 09/09/1980 |
| 4221607 | Calcining effect of synthetic iron oxide Copperas solution is purified and mixed with a silica-containing material, such as fumed silica. The mixture is then dried to give a monohydrate (FeSO4.H.sub.2 O)/silica material. Calcination of this substance results in a copperas red oxide ha... | 09/09/1980 |
| 4216079 | Emulsion breaking with surfactant recovery A process useful for recovering surfactant and oil of low water content in surfactant flood oil recovery projects is disclosed. A produced oil in water emulsion is treated with brine and partitioning agent, preferably isopropyl alcohol, by mixing and sett... | 08/05/1980 |
