| Patents for E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (64,186) |
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| 01/31/1989 | CA1249428A1 Surfactant composition and process for the production of oil using such a composition |
| 01/31/1989 | CA1249427A1 Microbiological control in uranium processing |
| 01/31/1989 | CA1249426A1 Stabilizing polymer thickened aqueous alkaline solutions with a mercaptobenzothiazole |
| 01/26/1989 | DE3722653A1 Method of constructing a ground-water measuring point and device for carrying out the method |
| 01/25/1989 | CN2031443U Balance type dense-oil pump |
| 01/25/1989 | CN2031442U Self-compensation gas bag for pneumatically-balanced oil pump |
| 01/24/1989 | US4799552 Method and apparatus for injecting radioactive tagged sand into oil and gas wells |
| 01/24/1989 | US4799551 Carbon dioxide slugs with clay effect inhibiting cations |
| 01/24/1989 | US4799547 Anionic surfactants for enhanced oil recovery |
| 01/24/1989 | US4799546 Drill pipe conveyed logging system |
| 01/19/1989 | DE3822734A1 Process for the assisted recovery of hydrocarbons in a silicon-containing geological formation |
| 01/18/1989 | EP0298965A1 Process for tertiary oil extraction from deep boreholes with evaluation of the petroleum gas emerging therefrom. |
| 01/17/1989 | US4798871 Compositions containing high molecular weight poly(vinylamines) for enhanced oil recovery |
| 01/17/1989 | US4798769 Electrode supporting conduit tube for electrical heating of underground hydrocarbon resources |
| 01/17/1989 | US4798247 Solenoid operated safety valve and submersible pump system |
| 01/17/1989 | US4798244 Tool and process for stimulating a subterranean formation |
| 01/17/1989 | CA1248936A1 Device for the remote actuation of an appliance associated with a duct in which an incompressible fluid circulates, particularly a device for actuating a stabilizer of a set of drill rods |
| 01/17/1989 | CA1248744A1 Method of recovering hydrocarbons from an underground formation |
| 01/11/1989 | CN2030650U Long-stroke cylinder oil pump |
| 01/10/1989 | US4797223 Water soluble polymers for detergent compositions |
| 01/10/1989 | US4797075 Overspeed protective gear box for a well pump |
| 01/10/1989 | US4797035 Method of installing a template on the seafloor |
| 01/10/1989 | US4797029 Remotely installing a tubular string |
| 01/10/1989 | US4797003 Foamed slurry generator |
| 01/10/1989 | US4796706 Liner setting apparatus and method for use in well casings |
| 01/10/1989 | US4796701 Pyrolytic carbon coating of media improves gravel packing and fracturing capabilities |
| 01/10/1989 | US4796698 Landing nipple and plug |
| 01/10/1989 | CA1248442A1 In-situ steam drive oil recovery process |
| 01/10/1989 | CA1248343A1 Stable forms of polyalkylaromatic sulfonates |
| 01/10/1989 | CA1248342A1 Silicate-containing oil recovery compositions |
| 01/10/1989 | CA1248341A1 Oil recovery agent |
| 01/10/1989 | CA1248337A1 Well drilling, workover and completion fluids |
| 01/04/1989 | EP0297960A2 Fluid-pumping apparatus in a well |
| 01/04/1989 | CN1030118A Steam enhanced oil recovery method using branched alkyl aromatic sulforates |
| 01/04/1989 | CN1030117A Method of assisted production of effluent to be produced contained in geological formation |
| 01/03/1989 | US4794990 Corrosion protected shaped charge and method |
| 01/03/1989 | US4794987 Solvent flooding with a horizontal injection well and drive fluid in gas flooded reservoirs |
| 01/03/1989 | CA1248213A1 Geomechanical probe for oil or gas wells |
| 01/03/1989 | CA1248015A1 Blowout preventer for use in combination with a deep well pump |
| 01/03/1989 | CA1248014A1 Miscible oil recovery process |
| 01/03/1989 | CA1248013A1 Down-hole gas anchor device |
| 01/03/1989 | CA1247850A1 Steam foam process |
| 12/29/1988 | WO1988010397A1 A method and a plant for transport of hydrocarbons over a long distance from an offshore source of hydrocarbons |
| 12/29/1988 | WO1988010356A1 Method and apparatus for cleaning wells |
| 12/29/1988 | DE3816670A1 Dome for landfills |
| 12/28/1988 | EP0296655A1 High-temperature diverting agent system for the oil industry, and corresponding treatment process |
| 12/28/1988 | EP0296207A1 Method and device for taking measurements and/or carrying out interventions in a well subjected to a hydraulic compression. |
| 12/28/1988 | CA1247607A Process for the heat stabilization of aqueous solutions of polysaccharides |
| 12/28/1988 | CA1247356A Potassium silicate clay stabilization process |
| 12/28/1988 | CA1247355A Gelling organic liquids |
| 12/28/1988 | CA1247354A Oil base well treating fluids thickened by block copolymers |
| 12/28/1988 | CA1247353A Acidizing method using microemulsion |
| 12/27/1988 | US4793737 Flexible riser system |
| 12/27/1988 | US4793656 Upgrading during mining |
| 12/27/1988 | US4793418 Hydrocarbon fluid separation at an offshore site and method |
| 12/27/1988 | US4793416 Organic crosslinking of polymers for CO2 flooding profile control |
| 12/27/1988 | US4793415 Method of recovering oil from heavy oil reservoirs |
| 12/27/1988 | US4793414 Steam injection profiling |
| 12/27/1988 | US4793413 Method for determining formation parting pressure |
| 12/27/1988 | US4793411 Retrievable gravel packer and retrieving tool |
| 12/27/1988 | US4793409 Method and apparatus for forming an insulated oil well casing |
| 12/27/1988 | US4793408 Device for separating and extracting components having different densities from an effluent |
| 12/22/1988 | EP0275304A4 Calcium-free clear high density fluids. |
| 12/21/1988 | EP0296137A1 A Method for connecting a conduit to a subsea structure, and a device for use in connecting a conduit end to a subsea structure |
| 12/21/1988 | EP0295922A2 Downhole tool and method for perforating and sampling |
| 12/21/1988 | EP0295712A2 Method and apparatus for forming an insulated oil well casing |
| 12/21/1988 | EP0295615A1 Compositions containing high molecular weight poly (vinylamines) for enhanced oil recovery |
| 12/21/1988 | EP0295291A1 System for moving a set of instruments and measurements and/or interventions method in a well. |
| 12/21/1988 | CN88105018A Method of thick-oil viscosity depression by emulsification |
| 12/20/1988 | US4791998 Method of avoiding stuck drilling equipment |
| 12/20/1988 | US4791990 Liquid removal method system and apparatus for hydrocarbon producing |
| 12/20/1988 | US4791985 System to proportion assisting fluids in a well |
| 12/20/1988 | US4791822 Cell assembly for determining conductivity and permeability |
| 12/20/1988 | CA1247033A1 Polysaccharide polymer made by xanthomonas |
| 12/20/1988 | CA1247000A1 Method and apparatus for producing viscous hydrocarbons utilizing a hot stimulating medium |
| 12/20/1988 | CA1246998A1 Controlling steam distribution |
| 12/20/1988 | CA1246997A1 Determining steam distribution |
| 12/20/1988 | CA1246996A1 Multiple zone oil recovery process |
| 12/20/1988 | CA1246995A1 Infill drilling pattern |
| 12/20/1988 | CA1246994A1 Method for treating a tar sand reservoir to enhance petroleum production by cyclic steam stimulation |
| 12/20/1988 | CA1246993A1 Gravity stabilized thermal miscible displacement process |
| 12/20/1988 | CA1246992A1 Method of altering the permeability of a hydrocarbon- containing subterranean formation |
| 12/20/1988 | CA1246991A1 Well bore recompletion |
| 12/20/1988 | CA1246990A1 Hydraulically activated liner setting device |
| 12/20/1988 | CA1246989A1 Isolation gravel packer |
| 12/20/1988 | CA1246988A1 Method and apparatus for gravel packing a well |
| 12/20/1988 | CA1246987A2 Multi-mode testing tool and method of testing |
| 12/20/1988 | CA1246854A1 Applications of scleroglucane in the treatment of oil wells and oil drilling installations |
| 12/15/1988 | WO1988009875A1 Travelling barrel downhole pump having a gas release probe |
| 12/15/1988 | DE3729273C1 Water-supply system with a pump |
| 12/14/1988 | EP0294656A2 Well for waste landfill |
| 12/13/1988 | US4790936 Oil-water separator balloon |
| 12/13/1988 | US4790387 Wellpoint assembly and method of installing a wellpoint assembly |
| 12/13/1988 | US4790385 Method and apparatus for perforating subsurface earth formations |
| 12/13/1988 | US4790384 Hydraulic well penetration apparatus and method |
| 12/13/1988 | US4790383 Method and apparatus for multi-zone casing perforation |
| 12/13/1988 | US4790376 Downhole jet pump |
| 12/13/1988 | CA1246541A1 Subsea well template levelling system |
| 12/13/1988 | CA1246440A1 Undersea template for the drilling of wells for the exploitation of hydrocarbon pools under the sea |
| 12/13/1988 | CA1246439A1 Method of electric smelting to matte in situ |