| 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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| 04/06/2011 | CN201786347U High-speed self-cleaning eddy flow type filter mechanism |
| 04/06/2011 | CN201786346U Coal bed gas multibranch horizontal well |
| 04/06/2011 | CN201786345U Distribution structure of multi-branch horizontal well for coal seam gas under boundary conditions |
| 04/06/2011 | CN201786344U Multistage fracturing tool |
| 04/06/2011 | CN201786343U Skid-mounted integrated water injection device |
| 04/06/2011 | CN201786342U High-precision oriented perforator |
| 04/06/2011 | CN201786341U High-speed self-cleaning composite filter mechanism |
| 04/06/2011 | CN201786340U High-speed compound filtering device capable of self-cleaning |
| 04/06/2011 | CN201786339U Skid-mounted bailing oil pumping device |
| 04/06/2011 | CN201786338U Roller transmission device for bailing pumping unit |
| 04/06/2011 | CN201786337U Electromagnetic brake apparatus for bailing oil pumping unit |
| 04/06/2011 | CN201786336U Adjustable takeoff and landing type non-beam pumping unit bracket |
| 04/06/2011 | CN201786335U Protection device for underground oil production machine |
| 04/06/2011 | CN201786334U Negative-pressure gas production process tubular column |
| 04/06/2011 | CN201786333U Energy-saving pumping unit |
| 04/06/2011 | CN201786332U Self-lubricating mechanism of long-ring rack pumping unit |
| 04/06/2011 | CN201786331U Driving reversing mechanism of elongated annular rack oil extractor |
| 04/06/2011 | CN201786330U Low-speed high-torque motor pumping unit |
| 04/06/2011 | CN201786329U Double-well oil pumping machine with bilateral linear motor |
| 04/06/2011 | CN201786317U Super-heavy oil thermal production well oil pipe sealing controller |
| 04/06/2011 | CN201786296U Manifold remote control anti-theft device |
| 04/06/2011 | CN201786269U High-speed self-cleaning eddy inner overflowing mechanism |
| 04/06/2011 | CN201786049U Skid-mounted integrated high pressure multi-well water distribution device |
| 04/06/2011 | CN102007268A Test procedure to determine concentration and relative distribution of sized particles in a drilling fluid |
| 04/06/2011 | CN102007267A Method of logging a well using a thermal neutron absorbing material |
| 04/06/2011 | CN102007266A Using mines and tunnels for treating subsurface hydrocarbon containing formations |
| 04/06/2011 | CN102005853A Adjustable device of motor base of scissors oil extractor |
| 04/06/2011 | CN102003174A Simulated experiment device of three-dimension radial flow sieve tube |
| 04/06/2011 | CN102003169A Method for repairing accident well of coal bed methane multi-branch horizontal well |
| 04/06/2011 | CN102003168A Leaked rock salt cavity low pressure mining technique |
| 04/06/2011 | CN102003167A Automatic blending control method of oil field fracturing fluid |
| 04/06/2011 | CN102003166A Gravity type oil well downhole continuous chemical adding device |
| 04/06/2011 | CN102003165A Integrated hollow confecting-polymer device |
| 04/06/2011 | CN102003164A Dropped initiation device |
| 04/06/2011 | CN102003163A Well mouth eccentric pressurizing sleeve oil recycling mobile device of production well |
| 04/06/2011 | CN102003162A Simple W-shaped traction pumping unit |
| 04/06/2011 | CN102002354A Oil displacement agent with ultra-low oil-water interfacial tension and application thereof |
| 04/06/2011 | CN102002348A Method for controlling water and preventing sand by using phase permeability regulator |
| 04/06/2011 | CN101614202B Double-deck defueling pump |
| 04/06/2011 | CN101078345B Oil field extraction liquid electromagnetic agglomerating pretreatment device |
| 04/06/2011 | CN101014681B Clay inhibitor for the drilling industry |
| 04/06/2011 | CA2716614A1 Direct fired conductive subterranean heating system |
| 04/05/2011 | US7919437 Wellbore fluid comprising sulfonated copolymers with pendant alkyl groups |
| 04/05/2011 | US7918284 Protective sleeve for threaded connections for expandable liner hanger |
| 04/05/2011 | US7918283 Method and apparatus for a cold flow subsea hydrocarbon production system |
| 04/05/2011 | US7918282 Zone isolation assembly array and method for isolating a plurality of fluid zones in a subsurface well |
| 04/05/2011 | US7918280 Radial indexing communication tool and method for subsurface safety valve with communication component |
| 04/05/2011 | US7918279 System and method for forming cavities in a well |
| 04/05/2011 | US7918277 Method of treating subterranean formations using mixed density proppants or sequential proppant stages |
| 04/05/2011 | US7918276 System and method for creating a gravel pack |
| 04/05/2011 | US7918272 Permeable medium flow control devices for use in hydrocarbon production |
| 04/05/2011 | US7918269 Drainage of heavy oil reservoir via horizontal wellbore |
| 04/05/2011 | CA2590423C Production of free gas by gas hydrate conversion |
| 04/05/2011 | CA2589555C Method and apparatus for preventing slug flow in pipelines |
| 03/31/2011 | WO2011038247A2 A system and apparatus for well screening including a foam layer |
| 03/31/2011 | WO2011038125A2 Method for handling viscous liquid crude hydrocarbons |
| 03/31/2011 | WO2011037954A2 Invert emulsion fluids with high internal phase concentration |
| 03/31/2011 | WO2011037950A2 Wellbore flow control devices using filter media containing particulate additives in a foam material |
| 03/31/2011 | WO2011037925A2 Method for controlling fluid production from a wellbore by using a script |
| 03/31/2011 | WO2011037914A2 Inflow control device and methods for using same |
| 03/31/2011 | WO2011037864A1 Downhole gas and liquid separation |
| 03/31/2011 | WO2011037849A2 Foamers for downhole injection |
| 03/31/2011 | WO2011037832A2 Foamers for downhole injection |
| 03/31/2011 | WO2011037478A1 Production manifold accessory |
| 03/31/2011 | WO2011037477A1 Integrated production manifold and multiphase pump station |
| 03/31/2011 | WO2011036575A2 Multi-layered sound attenuation mechanism |
| 03/31/2011 | WO2011016917A3 Methods of gravel packing long interval wells |
| 03/31/2011 | WO2011011169A3 Self-adjusting in-flow control device |
| 03/31/2011 | WO2011008522A3 System and method for intermittent gas lift |
| 03/31/2011 | WO2011002615A3 Flow control device with one or more retrievable elements |
| 03/31/2011 | WO2010151574A3 Water injection systems and methods |
| 03/31/2011 | WO2010146057A3 Expandable pipe coupling |
| 03/31/2011 | WO2010144365A3 Liquid crystals for drilling, completion and production fluids |
| 03/31/2011 | WO2010141405A3 Hydraulic oilfield lift pump |
| 03/31/2011 | WO2010140032A3 Use of encapsulated tracers |
| 03/31/2011 | WO2010133564A3 Method of protecting a flexible riser and an apparatus therefor |
| 03/31/2011 | WO2010132704A3 In situ method and system for extraction of oil from shale |
| 03/31/2011 | WO2010132489A3 Scintillator crystal materials, scintillators and radiation detectors |
| 03/31/2011 | WO2010129700A3 Amine sacrificial agents and methods and products using same |
| 03/31/2011 | WO2010128270A3 Treatment fluids for reduction of water blocks, oil blocks, and/or gas condensates and associated methods |
| 03/31/2011 | WO2010101824A3 In situ loop antenna arrays for subsurface hydrocarbon heating |
| 03/31/2011 | WO2010021563A8 Hydraulic fracturing proppants |
| 03/31/2011 | WO2010001087A3 Apparatus and method for inflow control |
| 03/31/2011 | US20110073322 Gas lift plunger acceleration arrangement |
| 03/31/2011 | US20110073319 Double string pump for hydrocarbon wells |
| 03/31/2011 | US20110073318 Producing gas and liquid from below a permanent packer in a hydrocarbon well |
| 03/31/2011 | US20110073317 Slim hole production system |
| 03/31/2011 | US20110073316 Surface refillable protector |
| 03/31/2011 | US20110073311 Pumpable geopolymer formulation for oilfield application |
| 03/31/2011 | US20110073309 Method of proppant oil or gas formation fracture |
| 03/31/2011 | US20110073308 Valve apparatus for inflow control |
| 03/31/2011 | US20110073307 Forming Structures in a Well In-Situ |
| 03/31/2011 | US20110073306 Downhole gas and liquid separation |
| 03/31/2011 | US20110073305 Multisection Downhole Separator and Method |
| 03/31/2011 | US20110073304 Multistage downhole separator and method |
| 03/31/2011 | US20110073302 Method of controlling growth and heat loss of an in situ gravity draining chamber formed with a condensing solvent process |
| 03/31/2011 | US20110073301 Well jet device for logging and developing horizontal wells with abnormally low formation pressure |
| 03/31/2011 | US20110073295 Phase-controlled well flow control and associated methods |
| 03/31/2011 | CA2775841A1 Downhole gas and liquid separation |
| 03/31/2011 | CA2775224A1 Multi-layered sound attenuation mechanism |