| 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) |
|---|
| 03/06/1990 | US4906048 Method of downhole hydraulicking of mineral resources |
| 03/06/1990 | US4905759 Collapsible gun assembly |
| 03/06/1990 | CA1266429A1 Method for consolidating formation surrounding borehole |
| 02/28/1990 | EP0355505A1 Low density proppants and methods for making and using same |
| 02/28/1990 | CN1006994B Fracturing method for stimulation of wells utilizing carbon dioyide based fluids |
| 02/27/1990 | US4904586 Enzymatic process for treating xanthan gums in order to improve the filterability of their aqueous solutions |
| 02/27/1990 | US4903772 Surrounding a cased well bore |
| 02/27/1990 | US4903771 Method for establishing effective barriers to production of undesired fluids in the recovery of oil |
| 02/27/1990 | US4903770 Adding polymerizable monomer, diluent, acid catalyst; injecting with steam |
| 02/27/1990 | US4903769 Method of controlling permeability damage of hydrocarbon formations during steam injection using bicarbonate ions and sources of ammonia |
| 02/27/1990 | US4903768 Steam injection till breakthrough activating gellable mixture to solid gel in situ, sealing high permeability zone |
| 02/27/1990 | US4903767 Crosslinking xanthane polymer with alkylated melamine resin, sealing breakthrough zone; stabilization, enhanced oil recovery |
| 02/27/1990 | US4903766 Selective gel system for permeability profile control |
| 02/27/1990 | CA1266227A1 Steamflood process employing horizontal and vertical wells |
| 02/22/1990 | WO1990001611A1 Removal of accumulated liquids in hydrocarbon wells |
| 02/22/1990 | WO1990001610A1 Safety switch for explosive well tools |
| 02/22/1990 | WO1990001609A1 In-situ remediation system for contaminated groundwater |
| 02/21/1990 | CN1039868A Two-stage balance bar beam-punping unit |
| 02/21/1990 | CN1006919B Process for petroleum recovery using surfaetant additives of alpha-ofefinic sulfonate and its oligomer |
| 02/20/1990 | US4902433 Equipment and method for filtration using a fabric of polyacrylonitrile fibers |
| 02/20/1990 | US4901802 Method and apparatus for perforating formations in response to tubing pressure |
| 02/20/1990 | US4901798 Apparatus and method for removal of accumulated liquids in hydrocarbon producing wells |
| 02/20/1990 | US4901796 Well packing system |
| 02/20/1990 | US4901563 System for monitoring fluids during well stimulation processes |
| 02/20/1990 | US4901413 Method and apparatus for establishing multi-stage gas separation upstream of a submersible pump |
| 02/20/1990 | CA1265992A1 Method for drawing up special crude oil |
| 02/14/1990 | CN2052812U Composite extended-range long stroke oil pumping machine |
| 02/14/1990 | CN1006820B Double cylinder screen |
| 02/13/1990 | US4901070 Pressure monitoring system with isolating means |
| 02/13/1990 | US4900433 Vertical oil separator |
| 02/13/1990 | US4900360 Process for using sludge from geothermal brine to make concrete and concrete composition |
| 02/13/1990 | US4899818 Method to improve use of polymers for injectivity profile control in enhanced oil recovery |
| 02/13/1990 | US4899817 Miscible oil recovery process using carbon dioxide and alcohol |
| 02/13/1990 | CA1265667A1 Surfactant flooding system |
| 02/08/1990 | WO1990001103A1 Apparatus and method for detonating well perforators |
| 02/07/1990 | EP0353740A1 Low density proppant and methods for making and using same |
| 02/07/1990 | EP0353309A1 Method of constructing a well |
| 02/07/1990 | EP0190286B1 Hollow microspheres made from dispersed particle compositions and methods and apparatus for producing them |
| 02/07/1990 | CN1006730B Stabilization of potassium silicate in clay |
| 02/06/1990 | US4898750 Processes for forming and using particles coated with a resin which is resistant to high temperature and high pH aqueous environments |
| 02/06/1990 | US4898244 Installation of downhole pumps in wells |
| 02/06/1990 | US4898243 Liner and drill pipe assembly |
| 02/06/1990 | US4898241 Method and device for taking measurements and/or carrying out interventions in a well subjected to hydraulic compression |
| 02/06/1990 | US4898240 System for moving a set of instruments and a method for measurement and/or intervention in a well |
| 02/06/1990 | US4898235 Wellhead apparatus for use with a plunger produced gas well having a shut-in timer, and method of use thereof |
| 02/06/1990 | CA1265437A1 Cyclic flooding of a naturally-fractured formation |
| 01/31/1990 | EP0352947A2 Apparatus and method for retaining a charge in a well perforator |
| 01/31/1990 | CN2052072U Pipeless submersible pump for gas-injection well |
| 01/31/1990 | CN1039296A Apparatus for conveying liquid between bottom and surface of sea |
| 01/30/1990 | US4896725 In-well heat exchange method for improved recovery of subterranean fluids with poor flowability |
| 01/30/1990 | US4896723 Phenolic resin crosslinking |
| 01/30/1990 | CA1265123A1 Mechanically actuated whipstock assembly |
| 01/30/1990 | CA1265043A1 Borehole extraction of minerals |
| 01/30/1990 | CA1264934A1 Curvature probe and method |
| 01/30/1990 | CA1264905A1 Hollow microspheres made from dispersed particle compositions |
| 01/25/1990 | WO1990000707A1 Installation for energy exchange between the ground and an energy exchanger |
| 01/25/1990 | WO1989009664A3 In situ heating to detoxify organic-contaminated soils |
| 01/24/1990 | EP0351884A1 Flow control device and packing sub |
| 01/24/1990 | CN2051669U High intensity magnetic injection enhancing device for water injecting well in oil production |
| 01/24/1990 | CN2051668U Pressure reducing and production increasing device for oil pumping well casing |
| 01/23/1990 | US4895710 High pressure, oil wells |
| 01/23/1990 | US4895207 Suspension in hydroxyethyl cellulose, thinning carrier to promote better packing |
| 01/23/1990 | US4895206 Combustion of high pressure gas, enhanced oil recovery |
| 01/23/1990 | CA1264680A1 Gas temperature control system for natural gas separator |
| 01/23/1990 | CA1264658A1 Method of an apparatus for crushing earth under the ground |
| 01/23/1990 | CA1264657A1 Enhanced hydrocarbon recovery process utilizing thermoelastic fracturing |
| 01/23/1990 | CA1264537A2 Process utilizing a polysaccharide polymer |
| 01/17/1990 | CN2051280U Casing auto-injection restrictive ring |
| 01/17/1990 | CN1006481B Cylindrical screen |
| 01/16/1990 | US4894285 Hydraulic fracturing of subterranean formations |
| 01/16/1990 | US4894069 Pumping |
| 01/16/1990 | US4893676 Well treating method and associated apparatus for stimulating recovery of production fluids |
| 01/16/1990 | CA1264438A1 Methods and apparatus for recovery of hydrocarbons and other liquids from underground |
| 01/11/1990 | DE3823167A1 Underwater pump arrangement |
| 01/10/1990 | CN2050880U Filter of liquid feeded into well |
| 01/09/1990 | US4892147 Hydraulic fracturing utilizing a refractory proppant |
| 01/09/1990 | US4892146 Alkaline polymer hot water oil recovery process |
| 01/09/1990 | CA1264291A1 Latching production seal assembly |
| 01/09/1990 | CA1264289A1 Flowline connection module |
| 01/03/1990 | EP0349335A2 Plug for a gravel packer |
| 01/03/1990 | EP0349267A1 Apparatus for tensioning a riser |
| 01/03/1990 | EP0348463A1 Gravel pack for petroleum or water wells |
| 01/03/1990 | CN2050470U Head sheave lengthening type long-stroke beam-pumping unit |
| 01/03/1990 | CN2050469U Apparatus for obtaining gas from low pressure well |
| 01/02/1990 | US4891155 Preparation of alkyl aryl sulfonate concentrates having low viscosity |
| 01/02/1990 | US4890682 Apparatus for vibrating a pipe string in a borehole |
| 01/02/1990 | US4890673 Method of removing volatile contaminants from contaminated earth strata |
| 01/02/1990 | US4890672 Method of controlling the flow of landfill gas from sanitary landfills and apparatus for performing the method |
| 01/02/1990 | CA1264147A1 Heavy oil recovery process using intermittent steamflooding |
| 12/28/1989 | WO1989012728A1 In-well heat exchange method for improved recovery of subterranean fluids with poor flowability |
| 12/28/1989 | DE3923301A1 Plastic-bound prefabricated filtering stone for use in drinking water wells and other units through which flow liquids and gases |
| 12/27/1989 | EP0347576A2 Well having means for expelling easy volatile impurities form underground water |
| 12/27/1989 | CN1038329A Old-bittern underground drainage after mining and processing of salt deposit |
| 12/27/1989 | CN1038328A Nitrogen-gas heat-insulating technique for steam-injection oil production well tubing |
| 12/27/1989 | CN1038327A Recovery of oil from oil reservoirs |
| 12/27/1989 | CN1006242B Firing system for tubing conveyed perforating gun |
| 12/26/1989 | US4889638 Agitation and/or gas separation and dispersed gas flotation |
| 12/26/1989 | US4889186 Overlapping horizontal fracture formation and flooding process |
| 12/26/1989 | US4889183 Method and apparatus for retaining shaped charges |
| 12/19/1989 | US4888240 High strength particulates |