| 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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| 03/10/2009 | US7500389 Tubing expansion |
| 03/10/2009 | CA2639418A1 Pump assembly |
| 03/10/2009 | CA2405608C Method and apparatus for acidizing a subterranean well formation for improving hydrocarbon production |
| 03/07/2009 | CA2639341A1 Downhole sliding sleeve combination tool |
| 03/07/2009 | CA2604996A1 Downhole perforation tool |
| 03/06/2009 | CA2639384A1 Wellbore fluid treatment tubular and method |
| 03/05/2009 | WO2009029653A1 Process for removing silica in heavy oil recovery |
| 03/05/2009 | WO2009029651A1 Process for recovering heavy oil utilizing one or more membranes |
| 03/05/2009 | WO2009029502A1 Method for identification of novel anaerobic denitrifying bacteria utilizing petroleum components as sole carbon source |
| 03/05/2009 | WO2009029500A1 Application of anaerobic denitrifying bacteria utilizing petroleum components as sole carbon source for oil recovery |
| 03/05/2009 | WO2009029451A1 Method and apparatus for fluid loss measurements of wellbore fluids |
| 03/05/2009 | WO2009029437A1 Interventionless multi-position frac tool |
| 03/05/2009 | WO2009029353A1 Tail-gas injection in a gas cycle operation |
| 03/05/2009 | WO2009027305A2 Apparatus for in situ extraction of bitumen or very heavy oil |
| 03/05/2009 | WO2009027273A1 Method and apparatus for in situ extraction of bitumen or very heavy oil |
| 03/05/2009 | WO2009027262A1 Method and apparatus for in situ extraction of bitumen or very heavy oil |
| 03/05/2009 | WO2009026787A1 A corrugated settling cup and a multi-cup uniform flux gas anchor |
| 03/05/2009 | WO2008154388A3 Use of low impact expansion to reduce flow friction |
| 03/05/2009 | WO2008151314A3 Interventionless composite packer |
| 03/05/2009 | WO2008127311A9 Volumetric displacement transducer for an underwater acoustic source |
| 03/05/2009 | US20090062153 Enzyme enhanced oil/gas recovery (EEOR/EEGR) using non-gel hydraulic fracturing in hydrocarbon producing wells |
| 03/05/2009 | US20090060801 Method for producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenance |
| 03/05/2009 | US20090058675 Non-contact capacitive datalink for a downhole assembly |
| 03/05/2009 | US20090057028 Downhole Draw Down Pump and Method |
| 03/05/2009 | US20090057014 Method of using a Drill In Sand Control Liner |
| 03/05/2009 | US20090056950 Means of preventing marine fouling of subsea connectors |
| 03/05/2009 | US20090056948 Safety Valve |
| 03/05/2009 | US20090056947 System and method for engaging completions in a wellbore |
| 03/05/2009 | US20090056945 Process for Removing Silica in Heavy Oil Recovery |
| 03/05/2009 | US20090056944 Enhanced oil recovery system for use with a geopressured-geothermal conversion system |
| 03/05/2009 | US20090056942 Method for recovering oil from an oil reservoir |
| 03/05/2009 | US20090056941 Methods for producing oil and/or gas |
| 03/05/2009 | US20090056940 Process for Recovering Heavy Oil Utilizing One or More Membranes |
| 03/05/2009 | US20090056939 Flow control device and method for a downhole oil-water separator |
| 03/05/2009 | US20090056935 Geometrical optimization of multi-well trajectories |
| 03/05/2009 | US20090056934 Interventionless multi-position frac tool |
| 03/05/2009 | CA2697820A1 Apparatus for "in-situ" extraction of bitumen or very heavy oil |
| 03/05/2009 | CA2697810A1 Method and apparatus for in situ extraction of bitumen or very heavy oil |
| 03/05/2009 | CA2697808A1 Method and apparatus for in situ extraction of bitumen or very heavy oil |
| 03/05/2009 | CA2695378A1 Application of anaerobic denitrifying bacteria utilizing petroleum components as sole carbon source for oil recovery |
| 03/05/2009 | CA2694914A1 Method for identification of novel anaerobic denitrifying bacteria utilizing petroleum components as sole carbon source |
| 03/05/2009 | CA2633208A1 Method of operating an electrical heating arrangement |
| 03/04/2009 | EP2029955A2 Perforating system comprising an energetic material |
| 03/04/2009 | EP2029858A2 Gravel packing screen with inflow control device and bypass |
| 03/04/2009 | EP2029856A1 Autonomous shut-off valve system |
| 03/04/2009 | EP1869285B1 Compositions and use of mono-and polyenoic acids for breaking ves-gelled fluids |
| 03/04/2009 | EP1402154A4 Hydrate reducing and lubrication system and method for a fluid flow system |
| 03/04/2009 | CN201204511Y Mobile device for oil extractor motor |
| 03/04/2009 | CN201203779Y Apparatus for automatically actuating intermittent pumping motor |
| 03/04/2009 | CN201202632Y Engine oil recovering device of oil pumping machine reduction box |
| 03/04/2009 | CN201202620Y Bridge type oil inlet plunger oil well pump |
| 03/04/2009 | CN201202461Y Rotating disintegration type oil (water) gas separator |
| 03/04/2009 | CN201202460Y Electric heating apparatus of hollow sucker rod |
| 03/04/2009 | CN201202459Y Self-limiting type protector |
| 03/04/2009 | CN201202458Y Minor diameter eccentric water distributing apparatus |
| 03/04/2009 | CN201202457Y Double-tube water injecting system of water injection well |
| 03/04/2009 | CN201202456Y Composite type synergistic gun perforation cartridge |
| 03/04/2009 | CN201202455Y Over oil control water sand-proof tube |
| 03/04/2009 | CN201202454Y Sieve tube with bulged type internal support sleeve |
| 03/04/2009 | CN201202453Y Sieve tube with novel internal support sleeve |
| 03/04/2009 | CN201202452Y Gravel filling apparatus |
| 03/04/2009 | CN201202451Y Vertical energy-saving oil pumping machine |
| 03/04/2009 | CN201202450Y Chain type oil pumping machine |
| 03/04/2009 | CN201202449Y Novel balancer of beam balance oil pumping machine |
| 03/04/2009 | CN201202448Y Circular tray permanent magnetism wind and water double-cold straight line motor oil pumping machine |
| 03/04/2009 | CN201202447Y Composite concentric tube column for liquor drainage gas production process |
| 03/04/2009 | CN201202446Y Prying type capillary steel tube liquor drainage gas production apparatus |
| 03/04/2009 | CN201202445Y Oil field accompanying gas recovering device |
| 03/04/2009 | CN201202444Y Deep branch well oil extraction pipe column |
| 03/04/2009 | CN201202443Y Variable stroke frequency energy-saving transmission device special for oil field oil pumping machine |
| 03/04/2009 | CN201202442Y Balance energy-saving oil pumping machine |
| 03/04/2009 | CN201202441Y Integrative pumping device |
| 03/04/2009 | CN201202433Y Net sheet loading type minitype flow controlling valve |
| 03/04/2009 | CN201202431Y Integrated static hydraulic water injection packer for large steepness well |
| 03/04/2009 | CN201202412Y Expansion screwed joint for expansion screen tube |
| 03/04/2009 | CN101379269A Mud flow back valve |
| 03/04/2009 | CN101377126A Corrugation-shaped sedimentation cup and multiple-cup equal flow type gas anchor |
| 03/04/2009 | CN101377125A Water well acidizing and sand prevention liquid replacing apparatus |
| 03/04/2009 | CN101377124A Horizontal bare hole flow guiding slot well and method for mining coal bed gas of sugarcoated haw well |
| 03/04/2009 | CN100465441C An elastic-sealing-valve oil pump |
| 03/03/2009 | US7497278 Methods of degrading filter cakes in a subterranean formation |
| 03/03/2009 | US7497267 Shunt tube connector lock |
| 03/03/2009 | US7497263 Method and composition of preparing polymeric fracturing fluids |
| 03/03/2009 | US7497262 Antiswelling agents contains shale encapsulator contsisting of quaternary polyacrylamide and polyvinyl alcohol, for absorbing and binding on clay particles, encapsulating the cuttings during drilling solids in subterranean formation |
| 03/03/2009 | US7497259 System and method for forming cavities in a well |
| 03/03/2009 | US7497257 Particle control screen with depth filtration |
| 03/03/2009 | US7497254 Pocket for a downhole tool string component |
| 03/03/2009 | US7497253 Downhole steam generator |
| 03/03/2009 | CA2553897C Methods of cementing in subterranean formations using crack resistant cement compositions |
| 03/03/2009 | CA2541077C Method and conduit for transmitting signals |
| 03/03/2009 | CA2531216C Methods and compositions for enhancing consolidation strength of proppant in subterranean fractures |
| 03/03/2009 | CA2528604C Method and apparatus for hydrating a gel for use in a subterranean well |
| 03/03/2009 | CA2340534C Field development system and associated methods |
| 02/28/2009 | CA2638532A1 Flow control device and method for a downhole oil-water separator |
| 02/28/2009 | CA2599630A1 Stinger for shrouded submersible pump |
| 02/26/2009 | WO2009026229A1 Viscous oil inflow control devices for equalizing screen flow |
| 02/26/2009 | WO2009026044A2 Enhanced cooling for downhole motors |
| 02/26/2009 | WO2009026043A2 Smart motor controller for an electrical submersible pump |
| 02/26/2009 | WO2009026021A2 Diverting agents for water shut off |
| 02/26/2009 | WO2009024545A1 Method for controlling production and downhole pressures of a well with multiple subsurface zones and/or branches |