| 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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| 09/14/1999 | CA2071849C Method of supporting fractures in geological formations and hydraulic fluid composition for same |
| 09/10/1999 | WO1999045236A1 Formation testing apparatus and method |
| 09/10/1999 | WO1999045234A1 A non-rotating sensor assembly for measurement-while-drilling |
| 09/10/1999 | WO1999044747A1 Separator inlet |
| 09/10/1999 | WO1999031198A3 Plant for removing carbon dioxide from gases and method for the exploitation of said plant |
| 09/08/1999 | EP0939879A1 A plant for exploiting geothermal energy |
| 09/08/1999 | EP0939854A1 Connector for an expandable tubing string |
| 09/08/1999 | EP0874694B1 Cyclonic separator assembly and method |
| 09/07/1999 | US5948734 Well treatment fluid compatible self-consolidating particles |
| 09/07/1999 | US5947642 Method and apparatus for connecting an underwater flexible riser to a structure on the surface |
| 09/07/1999 | US5947204 Production fluid control device and method for oil and/or gas wells |
| 09/07/1999 | US5947200 Method for fracturing different zones from a single wellbore |
| 09/02/1999 | WO1999044168A1 Method for measuring and controlling the flow of natural gas from gas wells |
| 09/02/1999 | WO1999043924A1 Energy recovery in a wellbore |
| 09/02/1999 | WO1999023349A8 Device for connecting a manifold module and a structure on a seabed |
| 09/02/1999 | DE19910514A1 Rotary piston machine for use as engine |
| 09/01/1999 | EP0938622A1 Method for accelerating production - c-i-p ii |
| 09/01/1999 | CN2336093Y Special stainless steel wire filter screen sand anchor |
| 09/01/1999 | CN2336092Y Electric controller for mechanical balance adjusting device of beam pumping unit |
| 09/01/1999 | CN2336091Y Pumping unit for suction of downhole crude |
| 09/01/1999 | CN1227305A Use of single molecular di-quaternary ammonium-salt in displacing-oil and demulsifying raw oil in oil field |
| 09/01/1999 | CN1227141A Catalyst for producing petroleum and its preparing method |
| 08/31/1999 | USRE36282 Drilling a bore hole; withdrawal fluids; separation |
| 08/31/1999 | US5944446 Injection of mixtures into subterranean formations |
| 08/31/1999 | US5944111 Internal riser tensioning system |
| 08/31/1999 | US5944109 Method of completing and producing a subteranean well and associated |
| 08/31/1999 | US5944107 Method and apparatus for establishing branch wells at a node of a parent well |
| 08/31/1999 | US5944106 Gelating aqueous fluids |
| 08/31/1999 | US5944105 Of a subterranean zone or formation penetrated by a wellbore |
| 08/31/1999 | US5944104 Method of increasing the methane recovery from a subterranean formation |
| 08/31/1999 | CA2195966C Method of fracturing and propping a formation |
| 08/31/1999 | CA2157797C Groundwater recovery system |
| 08/26/1999 | WO1999042700A1 Improvements in or relating to reducing water flow |
| 08/26/1999 | WO1999042696A1 Method and system for drilling and completing underbalanced multilateral wells |
| 08/25/1999 | EP0937861A2 Apparatus and methods for completing a wellbore |
| 08/25/1999 | EP0937192A1 Groundwater recovery system |
| 08/25/1999 | CN2334872Y Chemical temporary-blocking tap for water injection well of oil field |
| 08/25/1999 | CN2334871Y Sand filter for oil well flow string |
| 08/25/1999 | CN2334870Y Sand-taking pumping-aid device for oil well |
| 08/25/1999 | CN1226948A Subsea well |
| 08/25/1999 | CN1226628A Technology for frozen separating liquid by chemical displacement |
| 08/24/1999 | US5942469 Foamy emulsion having gas phase of water vapor and carbon dioxide and/or methane, continuous liquid phase of crude oil and brine, dispersed phase containing defoaming agent and demulsifying agent, water and optional stabilizer |
| 08/24/1999 | US5941311 Down-hole, production pump and circulation system |
| 08/24/1999 | US5941308 Flow segregator for multi-drain well completion |
| 08/24/1999 | US5941307 Production well telemetry system and method |
| 08/24/1999 | US5941305 Real-time pump optimization system |
| 08/19/1999 | WO1999041142A1 Spar system |
| 08/19/1999 | WO1999040992A1 Apparatus and method for separating oil, water and solids |
| 08/18/1999 | EP0936345A1 Method of protecting well tubular goods from corrosion |
| 08/18/1999 | EP0912651A4 Clay-free biodegradable wellbore fluid and method for using said fluid |
| 08/18/1999 | EP0807201B1 Multiple drain drilling and production apparatus |
| 08/18/1999 | CN2333826Y Oil well pump oil valve |
| 08/18/1999 | CN2333825Y Diverting oil well sand screen |
| 08/17/1999 | US5939330 Repetitively testing liquid samples; for monitoring radioactive contamination around nuclear reactors |
| 08/17/1999 | US5938925 Progressive gap sand control screen and process for manufacturing the same |
| 08/17/1999 | US5937955 Method and apparatus for sealing a well bore and sidetracking a well from the well bore |
| 08/17/1999 | US5937949 Process for the consolidation of sand |
| 08/17/1999 | US5937946 Apparatus and method for enhancing fluid and gas flow in a well |
| 08/17/1999 | US5937945 Computer controlled gas lift system |
| 08/17/1999 | US5937944 Particle control screen assembly for a perforated pipe used in a well, a sand filter system, and methods of making the same |
| 08/17/1999 | US5937894 System and method for transporting a fluid susceptible to hydrate formation |
| 08/17/1999 | CA2159406C Process for the extraction of crude oil |
| 08/17/1999 | CA2153144C Downhole roller vane motor and roller vane pump |
| 08/17/1999 | CA2017047C Method of scavenging hydrogen sulfide from hydrocarbons |
| 08/12/1999 | WO1999039846A1 Downhole pressure generator and method for use |
| 08/11/1999 | EP0935050A2 Wear resistant crossover |
| 08/11/1999 | EP0828918B1 Connector assembly for an expandable slotted pipe |
| 08/11/1999 | CN2332813Y Perforation detector of deep penetration widowmaker |
| 08/11/1999 | CA2261480A1 Application of aluminium chlorohydrate in viscosifying brine for carrying proppants in gravel packing |
| 08/10/1999 | US5935423 Mixing a diluent with heavy crude oil, transporting the mixture to a market location, distilling to produce first distillate hydrocarbon, passing through fluidized bed with oxygen to produce, steam, electricity, heat and synthesis gas |
| 08/10/1999 | US5934377 Method for isolating hydrocarbon-containing formations intersected by a well drilled for the purpose of producing hydrocarbons therethrough |
| 08/10/1999 | US5934376 Methods and apparatus for completing wells in unconsolidated subterranean zones |
| 08/10/1999 | US5934373 Apparatus and method for monitoring underground fracturing |
| 08/10/1999 | US5934372 Pump system and method for pumping well fluids |
| 08/10/1999 | US5934371 Remotely controlled shut-off valve and variable choke assembly |
| 08/10/1999 | CA2229301A1 High pressure well effluent separator |
| 08/10/1999 | CA2150175C Abrasive slurry jetting tool and method |
| 08/05/1999 | WO1999039073A2 Method and apparatus for running two tubing strings into a well |
| 08/05/1999 | WO1999038617A1 Improvements relating to oil-sand separation |
| 08/04/1999 | EP0933414A1 Reducing the amount of water produced with hydrocarbons from wells |
| 08/03/1999 | US5931602 Device for oil production at great depths at sea |
| 08/03/1999 | US5931600 Thermal desorption and destruction of dense non-aqueous phase liquid in fractured bedrock |
| 08/03/1999 | US5931232 Mechanical connection between base pipe and screen and method for use of the same |
| 08/03/1999 | US5931230 Visicous oil recovery using steam in horizontal well |
| 08/03/1999 | US5931229 Through tubing gravel pack system and method of gravel packing |
| 08/03/1999 | CA2229018A1 Pump/separator apparatus for viscous liquids |
| 08/03/1999 | CA2134980C Microencapsulated oil field chemicals and process for their use |
| 08/03/1999 | CA2029529C Casing valve |
| 07/28/1999 | EP0931907A2 Perforating gun and method for preparation thereof |
| 07/28/1999 | CN2330781Y Helical lobe pump downhole driving device |
| 07/28/1999 | CN1224109A Numerically controlled perforating coring apparatus |
| 07/27/1999 | US5930099 Grounding arrangement for a powerline system |
| 07/27/1999 | US5927404 Solids-stabilized emulsion having water, oil, and undissolved solids, |
| 07/27/1999 | US5927401 In a central wellbore |
| 07/27/1999 | US5927344 Subsea flexible pipe |
| 07/22/1999 | WO1999036668A1 Well treatment |
| 07/22/1999 | WO1999036665A1 Method for injecting of foamed concrete and a foamed concrete |
| 07/21/1999 | EP0929732A1 High density perforating gun system |
| 07/21/1999 | CN2329852Y Oil-gas mixed burner for oil field steam-injection boiler |
| 07/20/1999 | US5924745 Connector assembly for an expandable slotted pipe |