| 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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| 03/01/1994 | US5290151 Process for pumping a multi-phase gas-liquid mixture by means of the use of a pump |
| 03/01/1994 | US5290145 Multiple stage drag and dynamic pump |
| 03/01/1994 | US5289888 Water well completion method |
| 03/01/1994 | US5289881 Horizontal well completion |
| 03/01/1994 | US5289876 Completing wells in incompetent formations |
| 03/01/1994 | CA2104986A1 Apparatus and method for coupling elongated members |
| 02/28/1994 | CA2077028A1 Oil/gas separator for installation at burning wells |
| 02/25/1994 | CA2104426A1 Slug flow eliminator and separator |
| 02/23/1994 | CN2157304Y Double-purpose adjustable permanent-magnet injector |
| 02/23/1994 | CN2157303Y Energy-saving drag device for 1.14KV oil pumping unit |
| 02/23/1994 | CN1082660A Gas extracting method for coal mine tunnel |
| 02/22/1994 | US5288312 Fluid slug flow mitigation and gas separation system |
| 02/22/1994 | US5287928 Apparatus and method for repairing a gravel-packed well completion |
| 02/22/1994 | US5287927 For efficiently removing materials from soil |
| 02/22/1994 | US5287926 Method and system for underground gasification of coal or browncoal |
| 02/22/1994 | US5287924 Tubing conveyed selective fired perforating systems |
| 02/22/1994 | US5287923 Sand control installation for deep open hole wells |
| 02/22/1994 | US5287920 Large head downhole chemical cutting tool |
| 02/22/1994 | US5287741 Methods of perforating and testing wells using coiled tubing |
| 02/17/1994 | WO1994003705A1 Sintered screen completion |
| 02/17/1994 | WO1994003704A1 Gravel packing system |
| 02/17/1994 | WO1994003703A1 Gravel pack screen for well completions |
| 02/17/1994 | WO1994003702A1 Method and apparatus for sealing the juncture between a vertical and horizontal well |
| 02/17/1994 | WO1994003699A1 Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells |
| 02/17/1994 | CA2140754A1 Gravel pack screen for well completions |
| 02/16/1994 | EP0397875B1 Pipe roller-expanding device |
| 02/16/1994 | CN2156284Y Hydraulic under well injection hole device |
| 02/16/1994 | CN2156283Y Positioning flow limited press crack sealing and insulator |
| 02/16/1994 | CN1082139A Numerically controlled return-injection oil extraction apparatus for high-water-content discarded oil field |
| 02/15/1994 | US5286141 Plurality of mutually spaced wells, injection of hydrogen peroxide; monitoring of pH changes |
| 02/15/1994 | US5285848 Method for improving the recovery of oil from a subterranean formation by solvent concentration grading |
| 02/15/1994 | US5285683 Method and apparatus for determining orientation of a wellbore relative to formation stress fields |
| 02/09/1994 | EP0581976A1 Soil Gas Sampling Probe |
| 02/08/1994 | US5284576 Method of scavenging hydrogen sulfide from hydrocarbons |
| 02/08/1994 | US5284206 Injecting polymerizable oligomer of furfuryl alcohol with an acid catalyst prior to oil recovery; reduces permeability in high permeability zones |
| 02/08/1994 | CA2015318C Power sources for downhole electrical heating |
| 02/03/1994 | WO1994002707A1 Method of gravel packing a well |
| 02/02/1994 | EP0580575A1 Electromagnetic system for in situ heating |
| 02/02/1994 | CN2154905Y Crude oil extracting unit |
| 02/01/1994 | US5282995 Aqueous alkaline solution of diethylenetriaminepentaaacetic acid chelating agent and formate anion catalyst |
| 02/01/1994 | US5282508 Process to increase petroleum recovery from petroleum reservoirs |
| 02/01/1994 | CA2079536A1 Method and apparatus for disposing of water at gas wells |
| 01/26/1994 | EP0579631A1 Water extraction components produced by adhesive bonds, process for their manufacture and their use. |
| 01/26/1994 | CN2154347Y Packing electric hydroextractor of ground electrode |
| 01/26/1994 | CN1081236A Chain-type long stroke pumping unit |
| 01/25/1994 | US5282263 Method of stumulating oil wells by pumped solvent heated in situ to reduce wax obstructions |
| 01/25/1994 | US5281333 Arrangement for cleaning ground water |
| 01/25/1994 | US5281100 Well pump control system |
| 01/25/1994 | US5281023 Method and apparatus for automatically controlling a well fracturing operation |
| 01/25/1994 | CA1326437C Method for stimulating oil recovery from an underground reservoir |
| 01/20/1994 | WO1994001684A1 Process for recovering and causing highly viscous petroleum products to flow |
| 01/20/1994 | WO1994001655A1 Drive system for turning a swivel |
| 01/20/1994 | WO1994001232A1 Waste disposal in hydraulically fractured earth formations |
| 01/20/1994 | CA2139639A1 Waste disposal in hydraulically fractured earth formations |
| 01/19/1994 | EP0579497A1 Method for boosting the transfer of production fluid from a well |
| 01/19/1994 | CN2153655Y Electrothermal pumping unit |
| 01/18/1994 | US5279740 Ground contamination remediation process |
| 01/18/1994 | US5279367 Flooding of underground hydrocarbon formations |
| 01/18/1994 | US5279366 Method for wireline operation depth control in cased wells |
| 01/18/1994 | US5279362 Well screen and completion device having an attached gravel pack |
| 01/18/1994 | CA1326207C Method for selectively treating strata in subterranean formations by co-injection |
| 01/18/1994 | CA1326206C Method and means for taking measures and/or undertaking works in a well subjected to hydraulic compression |
| 01/17/1994 | CA2074013A1 Brake assembly for rotating rod |
| 01/12/1994 | EP0577931A1 Process for reducing or complete setting of water production during drilling for oil and/or hydrocarbon gas recovery |
| 01/12/1994 | CN1080695A Hollow oil pump and extracting process |
| 01/12/1994 | CN1080694A Energy-saving power device for sliding beam oil pump |
| 01/12/1994 | CN1080693A Sliding beam type oil pump numerical controlled power device |
| 01/12/1994 | CN1080687A Perforation depth measuring method for oil pipe delivery and measuring instrument |
| 01/11/1994 | US5277830 pH tolerant heteropolysaccharide gels for use in profile control |
| 01/11/1994 | US5277518 Contaminant remediation, biodegradation and removel methods and apparatus |
| 01/11/1994 | US5277262 Hydraulic safety pin and method of operating a pressure-controlled device |
| 01/11/1994 | US5277255 Well liner running shoe |
| 01/11/1994 | CA1325969C Conduit or well cleaning and pumping device and method of use thereof |
| 01/06/1994 | WO1994000669A1 Method and apparatus for inspecting subsurface environments |
| 01/06/1994 | WO1994000668A1 Method of and pumping system for operating and underground reservoir |
| 01/06/1994 | WO1994000667A1 Introduction of particulate material into a borehole |
| 01/06/1994 | CA2138664A1 Introduction of particulate material into a borehole |
| 01/06/1994 | CA2138013A1 Method and apparatus for inspecting subsurface environments |
| 01/05/1994 | EP0577300A2 Low permeability subterranean formation testing method |
| 01/05/1994 | EP0577290A2 Method of fracture acidizing subterranean formations |
| 01/05/1994 | EP0577010A2 Blocking water coning in oil and gas producing reservoirs |
| 01/05/1994 | EP0438568B1 Process for in situ decontamination of subsurface soil and groundwater |
| 01/05/1994 | DE4221198A1 Water flow decontamination - using slits in sediment of ground water outflow filled with a sorption agent to take=up water-soluble sorbable hazardous matter |
| 01/05/1994 | CN2152074Y Adjustable diameter water tap |
| 01/04/1994 | US5275739 In-situ restoration of contaminated soils and groundwater using calcium chloride |
| 01/04/1994 | US5275242 Repositioned running method for well tubulars |
| 01/04/1994 | US5275238 For use in a fluid production line |
| 01/04/1994 | US5275198 Portable self-contained ground water testing assembly |
| 01/04/1994 | US5275041 Equilibrium fracture test and analysis |
| 01/04/1994 | CA1325748C Method and device for connecting and anchoring a flexible line to a floating marine structure pipe |
| 01/02/1994 | CA2099219A1 Methods of fracture acidizing subterranean formations |
| 12/29/1993 | EP0576401A2 Borehole assembly, method and composition therefor |
| 12/29/1993 | EP0576210A1 Determining elastic anistropy in subterranean formations |
| 12/29/1993 | CN2151250Y Seperate oil/gas sucker |
| 12/28/1993 | US5273682 Gelation inhibition of a mixture of water and an alkyl aromatic sulfonate by adding a sulfonate or disulfonate |
| 12/28/1993 | US5273121 Intercarrier mechanism for connecting and orienting tubing conveyed perforating guns |
| 12/28/1993 | US5273116 Firing mechanism for actuating wellbore tools |
| 12/28/1993 | US5273115 Method for refracturing zones in hydrocarbon-producing wells |
| 12/28/1993 | US5273114 Gravel pack apparatus and method |
| 12/28/1993 | US5273111 Laterally and vertically staggered horizontal well hydrocarbon recovery method |