| 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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| 10/11/1994 | US5354456 Forming fibrous sealing mat on formation faces |
| 10/11/1994 | US5353876 Method and apparatus for sealing the juncture between a verticle well and one or more horizontal wells using mandrel means |
| 10/11/1994 | US5353875 Methods of perforating and testing wells using coiled tubing |
| 10/11/1994 | US5353874 Horizontal wellbore stimulation technique |
| 10/11/1994 | US5353870 Well purging and sampling pump |
| 10/05/1994 | CN2178783Y Wrapped sand filtering pipe with metal filter cover |
| 10/05/1994 | CN1093139A Oil-gas formation fracturing process with high-energy gas |
| 10/04/1994 | US5351757 Method for silica gel emplacement for enhanced oil recovery |
| 10/04/1994 | US5351756 Contacting in situ with a solution of water, anti-hydrate stabilizers which able to vaporize at low temperature than water, separating the stabilizer from gases by condensation, recycling to reuse |
| 10/04/1994 | US5351754 Apparatus and method to cause fatigue failure of subterranean formations |
| 10/01/1994 | CA2120108A1 Internally sealable perforable nipple for downhole well applications |
| 09/29/1994 | WO1994021889A2 Improvements in or relating to drilling and to the extraction of fluids |
| 09/29/1994 | WO1994021887A1 Method and device for cementing a well |
| 09/29/1994 | WO1994021883A1 Heat activated safety fuse |
| 09/29/1994 | WO1994021882A1 Hydrostatic activated ballistic blocker |
| 09/29/1994 | WO1994021881A1 Heat activated ballistic blocker |
| 09/29/1994 | CA2158637A1 Improvements in or relating to drilling and the extraction of fluids |
| 09/28/1994 | EP0617195A2 Well completion apparatus |
| 09/28/1994 | EP0617194A2 A well screen |
| 09/28/1994 | EP0616660A1 Method of propagating a hydraulic fracture using fluid loss control particulates |
| 09/28/1994 | EP0616656A1 Processes for local ground treatment, especially testing and cleaning polluted ground |
| 09/28/1994 | CN1026026C Process for pumping a multi-phase gas-liquid mixture by means of the use of a pump |
| 09/27/1994 | US5350528 Method of supporting fractures in geological formations and hydraulic fluid composition for same |
| 09/27/1994 | US5350014 Control of flow and production of water and oil or bitumen from porous underground formations |
| 09/27/1994 | CA2117044A1 Electrical submersible pump discharge head |
| 09/27/1994 | CA1332147C Process for the assisted recovery of heavy oil from a reservoir, with mainly horizontal bored weels |
| 09/23/1994 | CA2119521A1 Sand screen completion |
| 09/23/1994 | CA2119520A1 Sintered spherical plastic bead prepack screen aggregate |
| 09/21/1994 | CN2177802Y Direct heating type electric stove under pump for high-thick oil field low-temp. oil layer |
| 09/21/1994 | CN1092501A Wax removing bullet for oil well |
| 09/21/1994 | CN1092500A Well closing water and oil suction method and equipment |
| 09/21/1994 | CN1092335A Multi-layer composite screen |
| 09/20/1994 | US5348420 Method and arrangement for influencing liquid in ground |
| 09/20/1994 | US5348104 In a well assembly |
| 09/20/1994 | US5348096 Anisotropic composite tubular emplacement |
| 09/20/1994 | US5348095 Method of creating a wellbore in an underground formation |
| 09/20/1994 | US5348094 Device and method for pumping a viscous liquid comprising injecting a thinning product, application to horizontal wells |
| 09/20/1994 | US5348092 Gravel pack assembly with tubing seal |
| 09/20/1994 | US5347929 Firing system for a perforating gun including an exploding foil initiator and an outer housing for conducting wireline current and EFI current |
| 09/15/1994 | WO1994015722A3 Permeable isolation sectioned screen |
| 09/15/1994 | DE4407383A1 Filter pipe for wells |
| 09/14/1994 | EP0615112A1 Method for the determination of the yield of oil or water wells and test separator to carry out this method |
| 09/14/1994 | EP0615053A2 Well perforating system |
| 09/14/1994 | EP0614505A1 Template and process for drilling and completing multiple wells |
| 09/14/1994 | CN2177092Y PH fully automatic treatment device for oil well acidified waste liquid |
| 09/14/1994 | CN2177091Y Electric heating cable device for hollow oil sucking rod |
| 09/14/1994 | CN2177087Y Hot production wellhead assembly |
| 09/13/1994 | US5346330 Method of yielding oil residues or oil containing liquids from contaminated ground layers |
| 09/13/1994 | US5346016 Apparatus and method for centralizing pipe in a wellbore |
| 09/13/1994 | US5346015 Method of stimulation of a subterranean formation |
| 09/13/1994 | US5346014 Heat activated ballistic blocker |
| 09/13/1994 | US5346008 Polymer enhanced foam for treating gas override or gas channeling |
| 09/13/1994 | US5345655 Method of and arrangement for obtaining liquids and/or gases from ground or rock layers |
| 09/11/1994 | CA2118671A1 Air chamber actuator for a perforating gun |
| 09/07/1994 | EP0613406A1 Vacuum apparatus and process for in-situ removing underground liquids and vapors. |
| 09/07/1994 | CN2176429Y Heater of oil well pump |
| 09/07/1994 | CN2176428Y Device of oil extractor for buffer and increasing output |
| 09/07/1994 | CN1025886C Process for pumping a multi-phase gas-liquid mixture by emans of the use of a pump |
| 09/06/1994 | US5345034 Preventing groundwater pollution by injecting air to reduce hydraulic conductivity around contaminated area |
| 09/06/1994 | US5344532 Ultrasonic energy producing device |
| 09/06/1994 | US5343965 Apparatus and methods for horizontal completion of a water well |
| 09/06/1994 | US5343963 Method and apparatus for providing controlled force transference to a wellbore tool |
| 09/06/1994 | US5343953 Through-tubing recirculating tool assembly for well completions |
| 09/06/1994 | US5343949 Isolation washpipe for earth well completions and method for use in gravel packing a well |
| 09/06/1994 | US5343948 Sand control agent and process |
| 09/06/1994 | US5343945 Downholde gas/oil separation systems for wells |
| 09/01/1994 | WO1994019578A1 Well screen apparatus |
| 09/01/1994 | WO1994019577A1 Method for installing a gravel pack completion in a well |
| 09/01/1994 | WO1994019120A1 A method and a system for exploitation of gas from waste disposal sites |
| 09/01/1994 | DE4243303C1 Process for cleaning a well shaft |
| 08/31/1994 | EP0461140B1 Improvements relating to the lining of pipelines or passageways |
| 08/31/1994 | CN2175639Y Solid/liquid separation high permeability filter tube |
| 08/31/1994 | CN1091493A Low-displacement double-layer anti-sand method for well wall of plastics and almond shells |
| 08/30/1994 | US5341884 Subsea production method for line connection between a manifold and adjacent satellite mells |
| 08/30/1994 | US5341880 Sand screen structure with quick connection section joints therein |
| 08/30/1994 | US5341879 Fine filtration system |
| 08/30/1994 | US5341878 Injecting aqueous alkaline salt solution; recovering hydrocarbons from underground formation |
| 08/30/1994 | US5341877 Method and apparatus for in situ removal of a spilled fluid from the earth's subsurface |
| 08/30/1994 | US5341876 Below fracture pressure pulsed gel injection method |
| 08/30/1994 | CA2053425C Method and apparatus for gravel packing of wells |
| 08/25/1994 | CA2115467A1 Well treatment method and apparatus |
| 08/24/1994 | EP0611411A1 Two-part connector for fluid carrying conduits |
| 08/23/1994 | US5339905 Gas injection dewatering process and apparatus |
| 08/23/1994 | US5339904 Oil recovery optimization using a well having both horizontal and vertical sections |
| 08/23/1994 | US5339902 Well cementing using permeable cement |
| 08/23/1994 | US5339898 Electromagnetic reservoir heating with vertical well supply and horizontal well return electrodes |
| 08/23/1994 | US5339897 Recovery and upgrading of hydrocarbon utilizing in situ combustion and horizontal wells |
| 08/23/1994 | US5339895 Sintered spherical plastic bead prepack screen aggregate |
| 08/23/1994 | CA1331558C Means for the production of an effluent contained in a marine geological formation and production method developed therefrom |
| 08/18/1994 | WO1994018432A1 Method of reducing water in oil wells |
| 08/18/1994 | WO1994018430A1 Application of n,n-dialkylamides to reduce precipitation of asphalt from crude oil |
| 08/18/1994 | WO1994018396A1 Method and system for remediation of groundwater contamination |
| 08/18/1994 | WO1994018395A1 Method and system for remediation of groundwater contamination |
| 08/18/1994 | WO1994018065A1 An arrangement for buoy loading |
| 08/18/1994 | CA2154247A1 An arrangement for buoy loading |
| 08/18/1994 | CA2115886A1 Process and fluid for the recovery of oil in reservoirs with aquifer |
| 08/17/1994 | EP0610366A1 Gravel-packed pipeline and method and apparatus for installation thereof |
| 08/17/1994 | CN2174563Y Drip |
| 08/17/1994 | CN2174562Y Wax-cleaning, anti-plugging jet nozzle for oil production |
| 08/17/1994 | CN1025687C Method of manufacturing a selective isolation screen |