Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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)
04/2014
04/02/2014CN203515524U Sand adding device for oil wells
04/02/2014CN203515523U Downhole throttling device with rotary gas nipple and automatic adjustment function
04/02/2014CN203515522U Choke type oil well output liquid control device
04/02/2014CN203515521U Detonation safety device
04/02/2014CN203515520U Seat sealing and gun throwing connector device
04/02/2014CN203515519U Negative-pressure perforation oil-production string for oil well
04/02/2014CN203515518U Spray gun provided with long spray nozzle
04/02/2014CN203515517U Rapid-connection type perforating gun
04/02/2014CN203515516U Oil-recovery sand control tube
04/02/2014CN203515515U High-throughput sand filter pipe sand prevention matched pipe string
04/02/2014CN203515514U Hot melting non-permeable screen pipe device
04/02/2014CN203515513U Internally-generated pipeline of shaft
04/02/2014CN203515512U Water-dry lime sand artificial borehole wall sand prevention automatic sand mixing system
04/02/2014CN203515511U Offshore oil exploration device
04/02/2014CN203515510U Oil and water balanced type oil extraction device
04/02/2014CN203515509U Beam pumping unit with function of no-shutdown balance adjustment
04/02/2014CN203515508U Novel crank balancing walking-beam oil pumping unit
04/02/2014CN203515507U Novel adjustable balancing type walking-beam oil pumping unit
04/02/2014CN203515506U Novel oil pumping unit balance adjusting device
04/02/2014CN203515505U Novel gravel balance-adjusting oil pumping unit
04/02/2014CN203515504U Oil well production increasing and energy saving device
04/02/2014CN203515503U High-attitude operation safety belt hanger of beam-pumping unit
04/02/2014CN203515502U Oil pumping machine horse head straightening device
04/02/2014CN203515501U Tubingless hollow pump oil production device
04/02/2014CN203515500U Novel oil production device
04/02/2014CN203515499U Underground gas collecting device
04/02/2014CN203515498U Connected type associated gas recovery device
04/02/2014CN203515497U Adjustment device for balance weights of pumping units
04/02/2014CN203515496U Plunger gas lift controller with remote transmission and control function
04/02/2014CN203515495U Low-pressure gas well vortex plunger drainage gas recovery device
04/02/2014CN203515494U Double-sleeve single-pump layering pressure controlling and layer combining water drainage and gas production equipment
04/02/2014CN203515493U Adjustable balance-weight type energy-saving hydraulic pumping unit
04/02/2014CN203515492U Fireflood well sand-gas-preventing oil pumping device
04/02/2014CN203515491U Steel wire rope fastening mounting seat of wheel oil pumping device
04/02/2014CN203515470U Bottom switch for backward squeeze packing sand prevention of oil well
04/02/2014CN203515413U Mechanical and hydraulic dual-action ground anchor assembly
04/02/2014CN203515342U Completion pipe string for multi-cluster perforation fracture
04/02/2014CN103703213A Degradable fiber systems for well treatments and their use
04/02/2014CN103703212A Pipe-in-pipe apparatus, and methods and systems
04/02/2014CN103703211A Systems and methods for gravel packing wells
04/02/2014CN103701319A Wide-range inputting and voltage stabilizing power supply circuit for downhole perforation ignition control circuit
04/02/2014CN103696752A Control method for underground gasification pollutants
04/02/2014CN103696751A Method for mining underground sodium sulfate decahydrate by drilling hot water dissolving
04/02/2014CN103696750A Method for determining critical discharge capacity of annular sand fracturing pipe with packer
04/02/2014CN103696749A Closable fracture sliding sleeve
04/02/2014CN103696748A Intelligent well cementation slide sleeve separate-layer fracturing transformation process pipe column without stage limitation
04/02/2014CN103696747A Method for extracting shale oil and gas from oil shale in situ
04/02/2014CN103696746A Microwave excitation coal-bed gas desorption and seepage experimental device
04/02/2014CN103696745A Multifunctional experimental apparatus for dynamically simulating reservoir horizontal well
04/02/2014CN103696744A Three-stage layered commingled production string
04/02/2014CN103696743A Catridge shape cover, perforating bullet shell and ultra-deep penetrating perforating bullet
04/02/2014CN103696742A Ignition control circuit of downhole electric detonator for perforation
04/02/2014CN103696741A Sand control well completion structure with underground sand control tubular column capable of being withdrawn easily
04/02/2014CN103696740A Breechblock-type waterproof conduit joint
04/02/2014CN103696739A Device for anhydrous double-tube deep-sea oil production
04/02/2014CN103696738A Slide way type flexible positive torque oil pumping unit
04/02/2014CN103696732A Thermal recovery steam valve free of flow resistance
04/02/2014CN103696728A Double-stage self-sealing thermal recovery packer
04/02/2014CN103696723A Wellhead protector for intermittent-bailing pumping unit
04/02/2014CN103694983A Clay foam stabilizing complex additive for foam flooding as well as preparation method and application of clay foam stabilizing complex additive
04/02/2014CN103694980A High-efficiency biological enzyme oil-displacing agent and oil-displacing method
04/02/2014CN102732241B Easily-degradable alkali-free viscosity reducer for thick oil and preparation method thereof
04/02/2014CN102518414B Test method for fracture-cavity carbonate condensate gas reservoir water injection substituting gas experiment
04/02/2014CN102482929B Downhole device
04/02/2014CN102410005B Bidirectional energization explosion-propagating device
04/02/2014CN102400661B Balance valve for continuous oil pipe multi-layer fracturing operation
04/02/2014CN102352741B Underground separated coupling and nozzle hydraulic mixer
04/02/2014CN102322249B Method for improving oil reservoir recovery efficiency of interlayer developed deep-layer heavy oil
04/02/2014CN102317569B Method for disconnecting a device for transferring fluid between the bottom of an expanse of water and the surface and associated transfer device
04/02/2014CN102311728B Chemical pressure-reducing injection-increasing agent for injection well and preparation and use thereof
04/02/2014CN102296943B Plunger tool for gas recovery by liquid drainage in gas wells
04/02/2014CN102278103B Method for improving oil deposit recovery ratio of deep extremely-viscous oil by gravity drainage assisted steam flooding
04/02/2014CN102235163B Oil extraction method based on joint injection of hydrogen and carbon monoxide
04/02/2014CN102224320B Sand control screen assembly and method for use of same
04/02/2014CN102182429B Air balance hydraulic pumping unit for offshore platform
04/02/2014CN102162356B Simulation device for evaluating sand control effect and anti-blocking capability of sand control pipe
04/02/2014CN102116143B Method for extracting oil by utilizing indigenous microbe of oil pool subjected to polymer flooding
04/02/2014CN102116137B Blanking plug for eccentric water distributor
04/02/2014CN102011572B Composite high-temperature profile control method for heavy oil well
04/02/2014CN101970600B Method and composition for enhanced hydrocarbons recovery
04/02/2014CN101903615B Methods of treating subterranean wells using changeable additives
04/01/2014US8685902 Proppant, proppant production method and use of proppant
04/01/2014US8684096 Anchor assembly and method of installing anchors
04/01/2014US8684085 Storing device for stored substance and method for storing stored substance
04/01/2014US8684083 Perforating gun with rotatable charge tube
04/01/2014US8684081 Zero-leakoff gel
04/01/2014US8684080 Use of surfactant mixtures of polycarboxylates for microemulsion flooding
04/01/2014US8684079 Use of a solvent and emulsion for in situ oil recovery
04/01/2014US8684078 System and method for controlling fluid pumps to achieve desired levels
04/01/2014US8684077 Watercut sensor using reactive media to estimate a parameter of a fluid flowing in a conduit
04/01/2014CA2828651A1 Lift and choke control
04/01/2014CA2768229C Apparatus and method for controlling flow of solids into wellbores using filter media containing an array of three-dimensional elements
04/01/2014CA2763735C Permeability flow balancing within integral screen joints
04/01/2014CA2746617C Communicating fluids with a heated-fluid generation system
04/01/2014CA2717607C Apparatus for the inductive heating of oil sand and heavy oil deposits by way of current-carrying conductors
04/01/2014CA2702965C Parallel adaptive data partitioning on a reservoir simulation using an unstructured grid
04/01/2014CA2667377C Methods and apparatuses for electronic time delay and systems including same
03/2014
03/27/2014WO2014047594A1 An improved subsea connector system
03/27/2014WO2014047469A2 Downhole wellbore heating system and method
03/27/2014WO2014047319A1 Oil based flocculation mixing and dispersion system
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