| 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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| 12/25/2013 | CN203362141U Constant dryness distributor for steam-water mixtures in oil field steam-injection boiler heat network |
| 12/25/2013 | CN203362140U Vehicle-mounted movable dosing device for mechanical recovery well |
| 12/25/2013 | CN203362139U Upper guiding type centrifugal water distributor |
| 12/25/2013 | CN203362138U Watering flow regulating and controlling valve |
| 12/25/2013 | CN203362137U High-pressure controllable water injection device |
| 12/25/2013 | CN203362136U Flow regulating and controlling device for oilfield flooding |
| 12/25/2013 | CN203362135U Perforating device improving gas permeability of coal beds |
| 12/25/2013 | CN203362134U Sand-preventing gas-preventing desilting device |
| 12/25/2013 | CN203362133U Deepwater manifold horizontal sleeve type connector |
| 12/25/2013 | CN203362132U Underwater manifold sleeve-type connector pressure cover |
| 12/25/2013 | CN203362131U Leak-proof submarine oil drilling work station |
| 12/25/2013 | CN203362130U Energy-saving transmission device of oil pumping machine |
| 12/25/2013 | CN203362129U Novel pumping unit crude oil protecting box |
| 12/25/2013 | CN203362128U Novel pumping unit protecting sleeve |
| 12/25/2013 | CN203362127U Oscillating bar type rack pumping unit |
| 12/25/2013 | CN203362126U Core reservoir oil displacement experimental device |
| 12/25/2013 | CN203362125U Energy-saving drum-type oil pumping unit |
| 12/25/2013 | CN203362124U Wind energy power auxiliary device for pumping unit |
| 12/25/2013 | CN203362115U Double-direction starting type sliding sleeve on-off tool |
| 12/25/2013 | CN203362098U Ultrahigh-pressure coiled tubing fracture wellhead device |
| 12/25/2013 | CN203362082U Hanger setting tool for gas well fracturing |
| 12/25/2013 | CN203358852U Undersea operation cabin provided with in-and-out safety door |
| 12/25/2013 | CN103477094A Modular torque protection device |
| 12/25/2013 | CN103477029A Self-propelled simultaneous platform |
| 12/25/2013 | CN103477028A A method for indivdually servicing a plurality of zones of a subterranean formation |
| 12/25/2013 | CN103477027A Reverse rotation protection for borehole pumps |
| 12/25/2013 | CN103477026A Wellbore injection system |
| 12/25/2013 | CN103477025A Tubular actuating system and method |
| 12/25/2013 | CN103470242A Oilfield horizontal well volume fracturing method |
| 12/25/2013 | CN103470241A Dual-cluster hydraulic jet tubular column and dual-cluster hydraulic jet annulus fracturing method |
| 12/25/2013 | CN103470240A Hydraulic fracturing method capable of combining clustering perforation and front pitching |
| 12/25/2013 | CN103470239A Pressurized-dragging continuous fracturing process |
| 12/25/2013 | CN103470238A Holding device and rock core sleeve |
| 12/25/2013 | CN103470237A Unconventional reverse opposite penetration method and rotary signal navigator |
| 12/25/2013 | CN103470236A Automatic reinjection water heating production increasing process of coal-bed gas well |
| 12/25/2013 | CN103470235A High-pressure nitrogen foam generation measuring and control device |
| 12/25/2013 | CN103470234A Method for optimizing microbial oil displacement site injection process parameters |
| 12/25/2013 | CN103470233A Heavy oil reservoir natural gas huff-and-puff oil production process system and oil production method |
| 12/25/2013 | CN103470232A Production allocation machine with baffle plates |
| 12/25/2013 | CN103470231A Bottom-hole regulator with hemispherical structure on plug |
| 12/25/2013 | CN103470230A Dead-angle-free production allocation machine |
| 12/25/2013 | CN103470229A Sand protection matching pipe string for high-throughput sand filter pipe |
| 12/25/2013 | CN103470228A Hot melting impermeable screen pipe device |
| 12/25/2013 | CN103470227A Deep-sea Christmas tree of offshore oil field |
| 12/25/2013 | CN103470226A Efficient and energy-saving type twin-well pumping unit without walking beam |
| 12/25/2013 | CN103470225A Fishtailing type balance efficient and energy-saving pumping unit changing parameters automatically |
| 12/25/2013 | CN103470224A Device and method for circularly freezing and thawing in-situ broken oil shale |
| 12/25/2013 | CN103470223A Low-carbon co-mining method and system for fossil energy |
| 12/25/2013 | CN103470222A Underbalance well-completion tubing and gas lifting production combined method |
| 12/25/2013 | CN103470221A Underbalance tubing, no-killing gas lifting, shaft pumping and pump detecting combined method |
| 12/25/2013 | CN103470220A Natural gas hydrate simulation experiment apparatus |
| 12/25/2013 | CN103470195A High-temperature resisting and high-pressure resisting injecting and extracting integrated double-layer hollow sucker rod |
| 12/25/2013 | CN103468230A Secondary crosslinking, profile modification and profile control agent, and preparation method and application thereof |
| 12/25/2013 | CN102278102B Binary oil driving method for high-temperature and high-salt oil reservoir |
| 12/25/2013 | CN102230369B Device for collecting and purifying natural gas hydrates of seabed workstations |
| 12/25/2013 | CN102226391B Anti-erosion system based on hydraulic jet fracturing anti-vortex erosion valve |
| 12/25/2013 | CN102084085B Wellbore system |
| 12/25/2013 | CN102031952B Multi-stage perforation supercharging method |
| 12/25/2013 | CN101975048B Construction process of multi-branch underground screen pipe |
| 12/25/2013 | CN101495593B Composition for producing foams in process for extracting petroleum or natural gas |
| 12/25/2013 | CA2820491A1 System, method and apparatus for controlling fluid flow through drill string |
| 12/25/2013 | CA2799888A1 Lift system |
| 12/24/2013 | US8613323 Wellhead assembly |
| 12/24/2013 | US8613321 Bottom hole assembly with ported completion and methods of fracturing therewith |
| 12/24/2013 | US8613320 Compositions and applications of resins in treating subterranean formations |
| 12/24/2013 | US8613319 Lost-circulation material made from a recycled material containing asphalt |
| 12/24/2013 | US8613318 Flooding fluid and enhancing oil recovery method |
| 12/24/2013 | US8613316 Downhole steam generator and method of use |
| 12/24/2013 | US8613314 Methods to enhance the productivity of a well |
| 12/24/2013 | US8613312 Method and apparatus for stimulating wells |
| 12/24/2013 | US8613311 Apparatus and methods for well completion design to avoid erosion and high friction loss for power cable deployed electric submersible pump systems |
| 12/24/2013 | CA2758311C Well treatment compositions and methods utilizing nano-particles |
| 12/24/2013 | CA2738482C Method of acidizing a subterranean formation with diverting foam or fluid |
| 12/22/2013 | CA2820307A1 Determining location information of microseismic events during hydraulic fracturing |
| 12/22/2013 | CA2780670A1 Improving recovery from a subsurface hydrocarbon reservoir |
| 12/19/2013 | WO2013188862A1 A fisher tropsch method for offshore production risers or oil and gas wells |
| 12/19/2013 | WO2013188646A1 Methods of operation for reduced residual hydrocarbon accumulation in oil shale processing |
| 12/19/2013 | WO2013188330A1 Underbalance actuators and methods |
| 12/19/2013 | WO2013188281A1 Utilization of spheroidized tungsten in shaped charge systems |
| 12/19/2013 | WO2013188225A1 Lateral wellbore configurations with interbedded layer |
| 12/19/2013 | WO2013188223A1 Side-well injection and gravity thermal recovery processes |
| 12/19/2013 | WO2013188174A1 Flowpath identification and characterization |
| 12/19/2013 | WO2013188143A1 Elastically responsive unibody shear valve |
| 12/19/2013 | WO2013187943A1 Methods of removing a wellbore isolation device using a eutectic composition |
| 12/19/2013 | WO2013187905A1 Pressure limiting device for well perforation gun string |
| 12/19/2013 | WO2013187902A1 Method for making windows in oil well casing |
| 12/19/2013 | WO2013187878A1 Shunt tube connection assembly and method |
| 12/19/2013 | WO2013187855A1 Initiator device for a downhole tool |
| 12/19/2013 | WO2013187773A1 Heat exchange from compressed gas |
| 12/19/2013 | WO2013187771A1 Using wellstream heat exchanger for flow assurance |
| 12/19/2013 | WO2013186569A2 Subterranean formation methods and apparatus |
| 12/19/2013 | WO2013040298A3 Self-controlled inflow control device |
| 12/19/2013 | US20130334097 Nanocatalysts for hydrocracking and methods of their use |
| 12/19/2013 | US20130333893 Submersible Progressive Cavity Pump Driver |
| 12/19/2013 | US20130333892 Acidizing materials and methods and fluids for earth formation protection |
| 12/19/2013 | US20130333891 Wellbore isolation device containing a substance that undergoes a phase transition |
| 12/19/2013 | US20130333889 Method for the fracture stimulation of a subterranean formation having a wellbore by using impact-modified thermoset polymer nanocomposite particles as proppants |
| 12/19/2013 | US20130333888 Self-degrading ionically cross-linked biopolymer composition for well treatment |
| 12/19/2013 | US20130333887 Washpipe isolation valve and associated systems and methods |
| 12/19/2013 | US20130333886 Breaking diutan with metal activitor down to 140 °f or lower |