| 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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| 04/24/2013 | CN202900204U Downhole throttle device for coiled tubing |
| 04/24/2013 | CN202900203U Hole-diameter adjustable flow-limiting device |
| 04/24/2013 | CN202900202U Low-minute level twin-core cord type delay detonating mechanism |
| 04/24/2013 | CN202900201U Orientated measurement guiding butt joint device |
| 04/24/2013 | CN202900200U Ultrahigh pressure perforating gun |
| 04/24/2013 | CN202900199U Oil layer perforation ground high-pressure injection apparatus |
| 04/24/2013 | CN202900198U Controllable annular pressure hierarchical release system |
| 04/24/2013 | CN202900197U Sand prevention screen pipe |
| 04/24/2013 | CN202900196U Precoated sand prefilling double-layer slotted pipe |
| 04/24/2013 | CN202900195U 注汽管柱固体介质过滤器 Steam injection string of solid media filter |
| 04/24/2013 | CN202900194U Packing and sand control tool for secondary treatment of open-hole screen pipe of horizontal well |
| 04/24/2013 | CN202900193U Sand prevention precision optimization experimental device for sand prevention layer |
| 04/24/2013 | CN202900192U Mobile dry powder storing and dispersing module for water injection and oil production of ocean production platform |
| 04/24/2013 | CN202900191U Hydraulic pumping unit |
| 04/24/2013 | CN202900190U Chain drive device for pumping unit |
| 04/24/2013 | CN202900189U Electric submersible pump technique tubular pipe |
| 04/24/2013 | CN202900188U Movable oil production truck |
| 04/24/2013 | CN202900187U Flow string |
| 04/24/2013 | CN202900186U Walking beam balance oil pumping machine |
| 04/24/2013 | CN202900185U Movable oil fishing vehicle |
| 04/24/2013 | CN202900184U Derrick-type long-travel hydraulic pumping unit |
| 04/24/2013 | CN202900183U Hydraulic pumping unit rack structure |
| 04/24/2013 | CN202900182U Well mouth oil gas recovery device of producing well |
| 04/24/2013 | CN202900181U Device preventing polish rod from being collided to bent |
| 04/24/2013 | CN202900180U Beam-pumping unit anti-turning device |
| 04/24/2013 | CN202900179U Intelligent pumping unit |
| 04/24/2013 | CN202900178U Pumping unit control device preventing misoperation |
| 04/24/2013 | CN202900177U Pumping unit with power convenient to measure |
| 04/24/2013 | CN202900176U High-efficiency energy-saving oil pumping device |
| 04/24/2013 | CN202900175U Gas storage suspending pressure meter manometry completion pipe string |
| 04/24/2013 | CN202900174U Motor-driven hydraulic pumping unit |
| 04/24/2013 | CN202900085U Hair braid twisting prevention device for oil pumping unit |
| 04/24/2013 | CN202900060U Process string for coiled tubing perforation, casing fracturing and bridge plug packing |
| 04/24/2013 | CN202893075U Failed oil recovery device |
| 04/24/2013 | CN103069105A Olefin reduction for in situ pyrolysis oil generation |
| 04/24/2013 | CN103061734A Method for chemically making cave of open hole of gas well of coal seam |
| 04/24/2013 | CN103061733A Sleeve valve type fracturing production-increasing tool |
| 04/24/2013 | CN103061732A Hydraulic fracturing method of 2-3 meter hard medium sandstone stratum of roof of coal seam |
| 04/24/2013 | CN103061731A Method for producing viscous hydrocarbon using steam and carbon dioxide |
| 04/24/2013 | CN103061730A Method for coal bed methane mining by multi-element thermal fluid foam displacement |
| 04/24/2013 | CN103061729A Anaerobic simple core flooding simulation system simulating method |
| 04/24/2013 | CN103061728A Medicine dipping device used for oil field |
| 04/24/2013 | CN103061727A Method for designing profile controlling and flooding for pore-throat-scale elastic microspheres on basis of particle size matching relations |
| 04/24/2013 | CN103061726A Water distributor |
| 04/24/2013 | CN103061725A Hydrocarbon recovery process |
| 04/24/2013 | CN103061724A Layered pressure control combined drainage-production device for double coal-beds prone to dust and sand spraying |
| 04/24/2013 | CN103061723A Device capable of adjusting flow in modularized mode |
| 04/24/2013 | CN103061722A Soft landing system and method of achieving same |
| 04/24/2013 | CN103061721A Energy-saving pumping unit system and operation control mode thereof |
| 04/24/2013 | CN103061720A Multifunctional double arm interaction single-drive-wheel self-speed-changing pumping unit |
| 04/24/2013 | CN103061719A Multifunctional double arm interaction double-drive-wheel self-speed-changing pumping unit |
| 04/24/2013 | CN103061718A Dual-plunger cylinder type hydraulic pumping unit |
| 04/24/2013 | CN103061717A Four-cylinder type hydraulic pumping unit |
| 04/24/2013 | CN103061716A Energy-saving hydraulic pumping unit |
| 04/24/2013 | CN103061715A Pump jack pump-off control method and pump jack control apparatus |
| 04/24/2013 | CN103061709A Sliding bush control tool and hydraulic-control sliding bush capable of achieving surpassing operation |
| 04/24/2013 | CN103061684A Open-hole horizontal well sectional multi-cluster uniform acidizing tubular column and acidizing method thereof |
| 04/24/2013 | CN103061683A Dual-purpose tool as drill stem and well completion sieve tube |
| 04/24/2013 | CN103060245A Compound microorganism bacterium agent of biological coalbed methane prepared by coal bed organic impurities and application thereof |
| 04/24/2013 | CN103059830A Penetration agent for oil well, and preparation method as well as application thereof |
| 04/24/2013 | CN103059829A Nanometer emulsion type water control fracturing fluid for tight gas reservation well and preparation method thereof |
| 04/24/2013 | CN103059827A Construction method for preparing workover fluid based on liquid polymer |
| 04/24/2013 | CN103055549A Bottom-drawing-in-type underground multistage oil-water separating device |
| 04/24/2013 | CN102372381B Method for preparing polymer for oil displacement with injected water in oil reservoir |
| 04/24/2013 | CN102355083B Variable-stroke-frequency device of beam pumping unit |
| 04/24/2013 | CN102320857B Preparation method of artificial sand for sand prevention of oil-producing well and application thereof |
| 04/24/2013 | CN102287801B Supplementary combustion chamber of supercritical pressure gas-liquid fuel generator |
| 04/24/2013 | CN102168575B Loose blasting gas extraction technology for horizontal branch well of coal seam floor |
| 04/24/2013 | CN102162350B Method for improving flooding effect of polymer solution by using calcium and magnesium ions in water |
| 04/24/2013 | CN102155194B Laser perforation device in oil well |
| 04/24/2013 | CN102140905B Flexible-transmission composite balanced oil sucking machine |
| 04/24/2013 | CN102121369B Method for separating gas |
| 04/24/2013 | CN102071919B Oil-gas well fiber assisted water control fracturing method |
| 04/24/2013 | CN102052068B Method and device for composite fracturing/perforating for oil/gas well |
| 04/24/2013 | CN102031102B Preparation method and fracturing construction method of locally and continuously mixed clean fracturing fluid additive |
| 04/24/2013 | CN102011567B Positive torque rail force arm changing method and mechanism for walking beam pumping unit |
| 04/24/2013 | CN102003174B Simulated experiment device of three-dimension radial flow sieve tube |
| 04/24/2013 | CN101994494B Split dynamic depressurization device for oil gas well |
| 04/24/2013 | CN101828003B System for production of hydrocarbon |
| 04/24/2013 | CN101818636B Three-dimensional simulation test device for oil extraction by injecting multielement hot fluid |
| 04/24/2013 | CN101787854B Subsection well completion system of bottom water reservoir horizontal well |
| 04/24/2013 | CN101781980B Method for balancing reduction gearbox output shaft torque of ventilator and complete-cycle balancing device |
| 04/24/2013 | CN101737025B Method for reducing viscosity of crude oil |
| 04/24/2013 | CN101550822B Method and device for improving accuracy of layered flow rate test by ultrasonic flowmeter used for water injection well in oil fields |
| 04/24/2013 | CN101532380B Small-scale hydrogen sulfide removal device for well mouth of oil well |
| 04/24/2013 | CN101275465B Monitoring and automatic control of operating parameters for a downhole oil/water separation system |
| 04/24/2013 | CA2793831A1 Method for reducing or preventing contamination of a gaz zone in a geological formation of the "gas-over-bitumen" type |
| 04/24/2013 | CA2791318A1 Steam flooding with oxygen injection, and cyclic steam stimulation with oxygen injection |
| 04/23/2013 | US8424619 Drilling fluid |
| 04/23/2013 | US8424603 Multifunctional boronic crosslinkers and associated methods |
| 04/23/2013 | US8424602 Gas-assisted process for in-situ bitumen recovery from carbonate reservoirs |
| 04/23/2013 | US8424601 System and method for minimizing the negative enviromental impact of the oilsands industry |
| 04/23/2013 | US8424600 Methods and systems for treating subterranean wells |
| 04/23/2013 | US8424599 Automated closed loop flowback and separation system |
| 04/23/2013 | US8424597 Downhole gas and liquid separation |
| 04/23/2013 | US8424455 Surface safe explosive tool |
| 04/23/2013 | CA2755402C Downhole data communication |
| 04/23/2013 | CA2698948C Multi-function indicating tool |
| 04/23/2013 | CA2692432C Method of completing a well with sand screens |
| 04/23/2013 | CA2659492C Electric submersible pump with specialized geometry for pumping viscous crude oil |