| 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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| 06/21/1994 | US5322551 Fluid slug flow mitigation with partitioned pipe |
| 06/21/1994 | US5322388 Toxic waste monitoring and collection device |
| 06/21/1994 | US5322128 Method of forming well regions |
| 06/21/1994 | US5322127 Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells |
| 06/21/1994 | US5322126 System and method for monitoring fracture growth during hydraulic fracture treatment |
| 06/21/1994 | US5322125 Foamed gels to reduce gas coning in matrix environments |
| 06/21/1994 | US5322122 Simultaneous acid fracturing using acids with different densities |
| 06/21/1994 | US5322121 Hydraulic fracturing technique employing in situ precipitation |
| 06/21/1994 | US5322115 Installation for energy exchange between the ground and an energy exchanger |
| 06/21/1994 | US5322019 System for the initiation of downhole explosive and propellant systems |
| 06/21/1994 | CA1330257C Consolidation of partially cured resin coated particulate material |
| 06/21/1994 | CA1330256C Steam enhanced oil recovery method using branched alkyl aromatic sulfonates |
| 06/21/1994 | CA1330255C Lightweight proppants for oil and gas wells and methods for making and using same |
| 06/15/1994 | EP0601880A2 Perforating gun detonator package incorporating exploding foil |
| 06/15/1994 | CN2168660Y Swirling slurry screen |
| 06/15/1994 | CN1087779A Compounded bactericide in use for oil field flood pattern |
| 06/14/1994 | US5320500 Continuous mixing device, method and use in an installation for pumping a high viscosity fluid |
| 06/14/1994 | US5320178 Sand control screen and installation method for wells |
| 06/14/1994 | US5320176 Well fluid loss plug assembly and method |
| 06/14/1994 | US5320175 Subsea wellhead connections |
| 06/14/1994 | US5320174 Downhole chemical cutting tool and process |
| 06/14/1994 | US5320173 Method of preventing gas coning and fingering in a hydrocarbon bearing formation |
| 06/14/1994 | US5320171 Method of preventing gas coning and fingering in a high temperature hydrocarbon bearing formation |
| 06/14/1994 | US5320170 Oil recovery process employing horizontal and vertical wells in a modified inverted 5-spot pattern |
| 06/14/1994 | CA2030382C Process for in-situ surfactant washing of contaminated soil |
| 06/11/1994 | CA2111153A1 Perforating gun detonator package incorporating exploding foil |
| 06/11/1994 | CA2110202A1 Oil recovery optimization using a well having both horizontal and vertical sections |
| 06/09/1994 | WO1994012762A1 Apparatus for the recovery of fluids from a plurality of subterranean wells |
| 06/09/1994 | DE4240969A1 In-situ purificn. of soils, esp. dense soils of low permeability - comprises removing air contg. gaseous and volatile impurities from borehole, condensing and returning at least in part to soil |
| 06/08/1994 | EP0599832A1 Scale inhibition in oil producing wells. |
| 06/08/1994 | CN2168068Y Well rod heating cable |
| 06/08/1994 | CN1087699A Pre-fill sand prevention method and its device |
| 06/07/1994 | US5318698 Arrangement for cleaning contaminated ground water |
| 06/07/1994 | US5318385 Supporting system for lines and conductor pipes at offshore platforms |
| 06/07/1994 | US5318131 Hydraulically actuated liner hanger arrangement and method |
| 06/07/1994 | US5318128 Method and apparatus for cleaning wellbore perforations |
| 06/07/1994 | US5318126 Explosively opened production valve including a frangible breakup element operated by tubing pressure or rathole pressure or both |
| 06/07/1994 | US5318124 Recovering hydrocarbons from tar sand or heavy oil reservoirs |
| 06/07/1994 | US5318123 Method for optimizing hydraulic fracturing through control of perforation orientation |
| 06/07/1994 | US5318119 Method and apparatus for attaching well screens to base pipe |
| 06/07/1994 | US5318116 Vacuum method for removing soil contaminants utilizing thermal conduction heating |
| 06/07/1994 | CA2006482C Method for improving enhanced recovery of oil using surfactant-stabilized foams |
| 06/07/1994 | CA1329983C Method of removing polymer gels from a petroleum reservoir |
| 06/01/1994 | EP0599474A2 Controlling iron in aqueous well fracturing fluids |
| 06/01/1994 | EP0438455B1 Arrangement for protecting components in subsea systems |
| 05/31/1994 | US5316792 Hydraulic fracturing and propping using as proppants particles coated with heat curable resin reacted with formaldehyde-metal compound complex |
| 05/31/1994 | US5316411 Apparatus for in situ heating and vitrification |
| 05/31/1994 | US5316089 Method and apparatus for drilling a subsea well |
| 05/31/1994 | US5316085 Method of recovering contaminated subterranean fluids from a wellbore |
| 05/31/1994 | US5316082 Method of effectively diverting treating fluid from a high permeability interval during well stimulation |
| 05/25/1994 | EP0598316A1 Process for circulation of groundwater in areas with a sloping groundwaterlevel |
| 05/25/1994 | CN2166221Y Injection & suction heating pump |
| 05/25/1994 | CN2166220Y Drip on obtaining oil well head |
| 05/25/1994 | CN2166219Y Elastic support |
| 05/25/1994 | CN2166216Y Anti-theft simple christmas tree |
| 05/25/1994 | CN1087157A Site-reinjection device of free water for high-water-content oil well |
| 05/25/1994 | CN1087156A Controlling iron in aqueous well fracturing fluids |
| 05/24/1994 | US5314025 Fluid pumping apparatus and method of pumping fluid |
| 05/24/1994 | US5314020 Technique for maximizing effectiveness of fracturing in massive intervals |
| 05/24/1994 | US5314019 Method for treating formations |
| 05/24/1994 | US5314018 Apparatus and method for separating solid particles from liquids |
| 05/24/1994 | US5314017 Method of assisting the recovery of petroleum in vertically fractured formations utilizing carbon dioxide gas to establish gravity drainage |
| 05/24/1994 | CA2005806C Well packing system |
| 05/18/1994 | EP0597154A1 Method and apparatus for heating subsurface soil for decontamination |
| 05/17/1994 | US5311946 Method and process for the stabilization of resin coated particulates |
| 05/17/1994 | US5311942 Well screen having a protective frame for a horizontal or high-angle well |
| 05/17/1994 | US5311936 Method and apparatus for isolating one horizontal production zone in a multilateral well |
| 05/17/1994 | CA1329564C Recovery of oil from oil reservoirs |
| 05/17/1994 | CA1329495C System for monitoring fluids during well stimulation processes |
| 05/11/1994 | WO1994010449A1 Sludger |
| 05/11/1994 | WO1994010423A1 Modular, multi-level groundwater sampler |
| 05/11/1994 | WO1994010422A1 Thermal safety switch for use with electrically actuated wellbore tools |
| 05/10/1994 | US5310478 Method for production of hydrocarbon diluent from heavy crude oil |
| 05/10/1994 | US5310282 Hydrocarbon recovery from drilling mud stored in salt cavity |
| 05/10/1994 | US5310006 Satellite tree module and flow line structure for interconnection of a satellite well to a subsea production system |
| 05/10/1994 | US5310002 Fracturing fluid for gas formations, microemulsions, foaming agents |
| 05/10/1994 | US5310000 Foil wrapped base pipe for sand control |
| 05/10/1994 | US5309998 Pumping system including flow directing shoe |
| 05/10/1994 | US5309995 Well treatment using ball sealers |
| 05/10/1994 | US5309994 Method and apparatus for installing a well |
| 05/05/1994 | DE4237050A1 Bohrlochpumpe Borehole pump |
| 05/05/1994 | CA2082108A1 Method and apparatus for heating subsurface soil for decontamination |
| 05/04/1994 | EP0595156A1 Process for oil field water clarification using cationic dispersion polymers |
| 05/04/1994 | CN2163867Y Automatic temp-control valve of water jacket furnace for thick oil wells |
| 05/04/1994 | CN1086298A Process for recovering and causing highly viscous petroleum products to flow |
| 05/03/1994 | US5307984 Method of manufacturing a selective isolation screen |
| 05/03/1994 | US5307878 Polymer enhanced foams for reducing gas coning |
| 05/03/1994 | US5307875 Matrix acidizing in sandstone formations |
| 05/03/1994 | US5307874 Method for treating formations with gelatin |
| 05/03/1994 | US5307872 Automatic choke |
| 04/28/1994 | WO1994009254A1 Method of propagating a hydraulic fracture using fluid loss control particulates |
| 04/28/1994 | WO1994008739A1 In-situ process for remediating or enhancing permeability of contaminated soil |
| 04/27/1994 | EP0594479A1 Process to reduce the tendency to agglomerate of hydrates in production effluents |
| 04/27/1994 | EP0594391A1 Delayed detonation of downhole explosive |
| 04/27/1994 | CN1024364C Method for treatment of tail waste of insoluble sodium carbonate stone underground |
| 04/26/1994 | US5305832 Method for fracturing high temperature subterranean formations |
| 04/26/1994 | US5305829 Oil production from diatomite formations by fracture steamdrive |
| 04/26/1994 | CA2038290C Method of increasing the rate of production of methane from a coal seam |
| 04/22/1994 | CA2108806A1 Method and apparatus for extended time delay of the detonation of a downhole explosive assembly |
| 04/20/1994 | EP0466859B1 Pipework for constructing a ground water measuring point |