| 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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| 03/31/2011 | CA2774774A1 Invert emulsion fluids with high internal phase concentration |
| 03/31/2011 | CA2774156A1 Systems and methods for the quantitative estimate of production-forecast uncertainty |
| 03/31/2011 | CA2774109A1 A system and apparatus for well screening including a foam layer |
| 03/31/2011 | CA2773728A1 Method for handling viscous liquid crude hydrocarbons |
| 03/31/2011 | CA2771294A1 Foamers for downhole injection |
| 03/30/2011 | EP2302164A1 Methods of stabilizing unconsolidated subterranean formation |
| 03/30/2011 | EP2302163A1 Apparatus for adjustably controlling the inflow of production fluids from a subterranean well |
| 03/30/2011 | EP2302162A1 Apparatus for adjustably controlling the inflow of production fluids from a subterranean well |
| 03/30/2011 | EP2301138A1 Motor assembly |
| 03/30/2011 | EP1434642B1 High-pressure separation of a multi-component gas |
| 03/30/2011 | CN201779433U Motor belt protective cover of oil pumping machine |
| 03/30/2011 | CN201779246U Gear box anti-theft cover of oil pumping unit |
| 03/30/2011 | CN201778985U Thinning oil-well pump in thickened oil recovery |
| 03/30/2011 | CN201778810U Multiphase multifunctional measuring device of oil well |
| 03/30/2011 | CN201778809U Single-well meter for gathering and transferring oil gas |
| 03/30/2011 | CN201778803U Vertical fracture flow conductivity evaluation experimental device |
| 03/30/2011 | CN201778800U Scale separating and removing filtering device for oil extraction and transportation equipment |
| 03/30/2011 | CN201778799U Pipe column structure of underground straddle type packing layer-by-layer fracture acidizing tool for oil and gas well |
| 03/30/2011 | CN201778798U High-energy electrohydraulic explosion stratum treatment system |
| 03/30/2011 | CN201778797U High-density perforation fracturing and sand controlling device for oil well |
| 03/30/2011 | CN201778796U Fracturing fluid jet mixer |
| 03/30/2011 | CN201778795U Shaftless drum and cable pay-off system combination |
| 03/30/2011 | CN201778794U Automatic monitoring device for metering feeder |
| 03/30/2011 | CN201778793U Underground drug adding device |
| 03/30/2011 | CN201778792U Skid-mounted integrated filter device |
| 03/30/2011 | CN201778791U Multi-component high-pressure mixing injector for on-line profile control of water injection well |
| 03/30/2011 | CN201778790U Ground pressure reducing device for oil well |
| 03/30/2011 | CN201778789U Automatic control device for watering flow |
| 03/30/2011 | CN201778788U Downhole double-barreled water adding device |
| 03/30/2011 | CN201778787U Single-screw centrifugal injection downhole choke |
| 03/30/2011 | CN201778786U Hydraulic control isolation valve for downhole operations |
| 03/30/2011 | CN201778785U Underground hydraulic control balanced valve |
| 03/30/2011 | CN201778784U Brake lock of pumping unit |
| 03/30/2011 | CN201778783U Casing gas recovering device |
| 03/30/2011 | CN201778782U GRP protective cover of oil pumping unit |
| 03/30/2011 | CN201778781U Sand jamming prevention oil extraction production tubular column |
| 03/30/2011 | CN201778780U Balanced friction pumping unit driven underneath |
| 03/30/2011 | CN201778779U Lower drive friction oil pumping unit |
| 03/30/2011 | CN201778778U Bottom-driven two-way balanced friction oil pumping machine |
| 03/30/2011 | CN201778777U Bottom-driven bidirectional-balance friction-reversing-type pumping unit |
| 03/30/2011 | CN201778776U Reverse double-helix centrifugal jet downhole throttle |
| 03/30/2011 | CN201778775U Special sand and gas prevention device of electrical submersible pump |
| 03/30/2011 | CN201778774U Movable pedestal of oil pumping unit |
| 03/30/2011 | CN201778773U Pumping unit time efficiency monitoring device |
| 03/30/2011 | CN201778772U Slim hole sidetracking well clamp sealing fracturing string |
| 03/30/2011 | CN201778771U Fixed tubular column hydraulic jetting layer separating and fracturing integral tubular column |
| 03/30/2011 | CN201778770U Large-stroke foundation-free extended-range fixed type oil extractor |
| 03/30/2011 | CN201778769U Belt quick-change and speed-reducing energy-saving device of oil pumping unit |
| 03/30/2011 | CN201778768U Intelligent oil bailing pumping unit |
| 03/30/2011 | CN201778767U Integrated pipe string for looking for water proofing, water plugging, acidification and plugging breaking |
| 03/30/2011 | CN201778726U Special combination tool for well head in oil field |
| 03/30/2011 | CN201778681U Dome polish rod standby cap of pumping unit well |
| 03/30/2011 | CN101994506A Equidistant lines based method for automatically dividing well rows |
| 03/30/2011 | CN101994505A Drilling construction method by cooperation of horizontal wells and extraction straight wells for coal bed methane in multiple objective layers |
| 03/30/2011 | CN101994504A Continuous mixed acidification and fracturing combined process |
| 03/30/2011 | CN101994503A Production increasing method of coalbed gas |
| 03/30/2011 | CN101994502A Method of continuous dissolution of polyacrylamide emulsions for enhanced oil recovery (eor) |
| 03/30/2011 | CN101994501A Hydrogen-injection oil extraction method |
| 03/30/2011 | CN101994500A Expansion support horizontal screen pipe device and using method thereof |
| 03/30/2011 | CN101994499A Expandable screen assembly |
| 03/30/2011 | CN101994498A Control screen assembly |
| 03/30/2011 | CN101994495A Electromagnetic drive underground high-power resonant wave displacement device and method |
| 03/30/2011 | CN101994494A Split dynamic depressurization device for oil gas well |
| 03/30/2011 | CN101994493A Compound perforation dynamic depressurization device for oil gas well |
| 03/30/2011 | CN101994486A Structure for connecting heat insulation oil pipes |
| 03/29/2011 | US7915205 Single fluid acidizing treatment |
| 03/29/2011 | US7914266 Submersible pumping system and method for boosting subsea production flow |
| 03/29/2011 | US7913772 Drilling fluid flow diverter |
| 03/29/2011 | US7913762 Method of fracturing using ultra lightweight proppant suspensions and gaseous streams |
| 03/29/2011 | US7913761 System and method for enhanced wellbore perforations |
| 03/29/2011 | US7913759 Method for enhanced recovery of oil from oil reservoirs |
| 03/29/2011 | US7913758 Oil well perforators and method of use |
| 03/29/2011 | US7913755 Device and system for well completion and control and method for completing and controlling a well |
| 03/29/2011 | US7913754 Wellhead assembly and method for an injection tubing string |
| 03/29/2011 | US7913753 System for injecting a substance into an annular space |
| 03/29/2011 | US7913555 Tubing expansion |
| 03/29/2011 | CA2610660C Reconditioning process for used hydrocarbon based stimulation fluid |
| 03/29/2011 | CA2576536C Expandable fluted liner hanger and packer system |
| 03/29/2011 | CA2531301C System and method for completing a subterranean well |
| 03/29/2011 | CA2463692C An installation for the separation of fluids |
| 03/29/2011 | CA2457672C Downhole nmr processing |
| 03/24/2011 | WO2011034807A2 Metal-mediated viscosity reduction of fluids gelled with viscoelastic surfactants |
| 03/24/2011 | WO2011034695A2 Fracturing and gravel packing tool with multi movement wash pipe valve |
| 03/24/2011 | WO2011034694A2 Fracturing and gravel packing tool with shifting ability between squeeze and circulate while supporting an inner string assembly in a single position |
| 03/24/2011 | WO2011034692A2 Controlling coal fines in coal bed operations |
| 03/24/2011 | WO2011034679A2 Water heating apparatus for continuous heated water flow and method for use in hydraulic fracturing |
| 03/24/2011 | WO2011034547A1 Multilateral system with rapidtrip intervention sleeve and technique for use in a well |
| 03/24/2011 | WO2011034515A1 Method for the complex development of gas hydrate fields |
| 03/24/2011 | WO2011033685A1 Method of partially upgrading heavy oil at well-site |
| 03/24/2011 | WO2011032289A1 Offshore casing drilling method |
| 03/24/2011 | WO2010141197A3 Permeability flow balancing within integral screen joints |
| 03/24/2011 | WO2010135187A3 Systems and methods for deliquifying a commingled well using natural well pressure |
| 03/24/2011 | WO2010132345A3 Fracturing with telescoping members and sealing the annular space |
| 03/24/2011 | WO2010090659A3 Electromagnetic wave treatment of oil wells |
| 03/24/2011 | US20110069581 Removal of Surface-Wave Noise In Seismic Data |
| 03/24/2011 | US20110067890 Wellbore fluid treatment process and installation |
| 03/24/2011 | US20110067888 Plug counter and method |
| 03/24/2011 | US20110067885 Split stream oilfield pumping systems |
| 03/24/2011 | US20110067884 System and Method of Controlling Surge During Wellbore Completion |
| 03/24/2011 | US20110067883 Jet pump and multi-string tubing system for a fluid production system and method |