| 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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| 02/05/2008 | CA2473217C Expanding tubing with a radially extendable expander and cone |
| 02/05/2008 | CA2454594C Method and apparatus for surge pressure reduction in a tool with fluid motivator |
| 02/05/2008 | CA2283601C Shaped charge for large diameter perforations |
| 02/03/2008 | CA2555023A1 Combined anti-rotation and flow control tool |
| 02/01/2008 | CA2554803A1 No turn tag bar and method of use of the same |
| 01/31/2008 | WO2008014356A2 Apparatus, system, and method for in-situ extraction of hydrocarbons |
| 01/31/2008 | WO2008012806A1 Liquid purge valve |
| 01/31/2008 | WO2008012242A1 Mixture for improved foaming in the extraction of petroleum or natural gas |
| 01/31/2008 | WO2008012135A1 Connection tool with indexing system |
| 01/31/2008 | WO2008011704A1 In situ heavy oil and bitumen recovery process |
| 01/31/2008 | US20080026958 Magnesium peroxide difunctional components for cellulose derivatives and associated methods |
| 01/31/2008 | US20080023203 Apparatus and method for delivering chemicals into an underground well |
| 01/31/2008 | US20080023201 Concentrated Suspension of Particulate Additives for Fracturing and Other Fluids |
| 01/31/2008 | US20080023199 Cement Compositions Comprising Environmentally Compatible Defoaming Agents and Methods of Use |
| 01/31/2008 | US20080023198 Systems and methods for producing oil and/or gas |
| 01/31/2008 | US20080023197 Apparatus, system, and method for in-situ extraction of hydrocarbons |
| 01/31/2008 | CA2657215A1 Liquid purge valve |
| 01/31/2008 | CA2656462A1 Mixture for improved foaming in the extraction of petroleum or natural gas |
| 01/30/2008 | EP1882808A1 Flow restrictor coupling |
| 01/30/2008 | CN201013880Y Oil pumping machine reduction box theftproof fuel tank cover |
| 01/30/2008 | CN201013791Y Oil pumping machine soft start-up energy conservation actuator |
| 01/30/2008 | CN201013587Y Straight-line driving type intermittent rotating screw pump |
| 01/30/2008 | CN201013586Y Waterpower screw pump |
| 01/30/2008 | CN201013581Y Single flow valve of oil-well pump |
| 01/30/2008 | CN201013577Y Electric pump sand prevention device |
| 01/30/2008 | CN201013576Y Screw pump driving and monitoring apparatus |
| 01/30/2008 | CN201013575Y Duplex bearing bridging beam bearing bracket of oil pumping machine |
| 01/30/2008 | CN201013574Y Oil pumping machine braking locking block |
| 01/30/2008 | CN201013573Y Permanent magnetism synchronous non-gear-wheel driving screw pump type oil production machine |
| 01/30/2008 | CN201013572Y Oil pumping machine base adjuster |
| 01/30/2008 | CN201013368Y Polymer injection well mouth pressure-relieving sampling device |
| 01/30/2008 | CN201013352Y Remote automation control and data acquisition testing segregator system |
| 01/30/2008 | CN201013346Y Thick oil sand flow cold-acquisition transfer system |
| 01/30/2008 | CN201013345Y Novel down-hole three-phase separator |
| 01/30/2008 | CN201013344Y Corollary equipment for bottom water reservoir potential equilibrium dislodging |
| 01/30/2008 | CN201013343Y Controllable type conveniently aparted sand-blower |
| 01/30/2008 | CN201013342Y Gas-lift pipe column for fracturing fluid-discharging operation |
| 01/30/2008 | CN201013341Y High-pressure gaseous mixture generating device with water spray thermo-regulator |
| 01/30/2008 | CN201013340Y Oil field fire coal steam-injection boiler water treatment apparatus |
| 01/30/2008 | CN201013339Y Oil field fire coal steam-injection boiler high-pressure waterworks |
| 01/30/2008 | CN201013338Y Oil field fire coal steam-injection boiler water supply system deoxidization residual-removing and pressure device |
| 01/30/2008 | CN201013337Y Enriched flue gas injection device |
| 01/30/2008 | CN201013336Y Non-powered mine mouth dosing device |
| 01/30/2008 | CN201013335Y Water injection well pressure-working technique pipe column |
| 01/30/2008 | CN201013334Y Ground water distributor |
| 01/30/2008 | CN201013333Y Computer allocated gauging water distributor |
| 01/30/2008 | CN201013332Y Down-hole water distribution freely up-down portioning device |
| 01/30/2008 | CN201013331Y Retrievable tee water distributor |
| 01/30/2008 | CN201013330Y Composite screen pipe |
| 01/30/2008 | CN201013329Y Sintered stainless steel wire mesh sand screen pipe |
| 01/30/2008 | CN201013328Y Plasma compound die cavity slotting screen pipe |
| 01/30/2008 | CN201013327Y Rope type gas well down-hole sand-proof tool |
| 01/30/2008 | CN201013326Y High-pressure once extruding circulation packing tool |
| 01/30/2008 | CN201013325Y Connecting bar composite balancing beam-pumping unit |
| 01/30/2008 | CN201013324Y Natural gas well stabilization production allocator |
| 01/30/2008 | CN201013323Y Normal beam-pumping unit adjustable tail balancing means |
| 01/30/2008 | CN201013322Y Beam-pumping unit |
| 01/30/2008 | CN201013321Y Oil gas field multi-well short-distance casecade gas collection device |
| 01/30/2008 | CN201013320Y Hydraulic intelligent pumping unit |
| 01/30/2008 | CN201013319Y Double-chain driven straightly reciprocating single head sheave load-carrying pumping unit |
| 01/30/2008 | CN201013318Y Pump collision operation regulator |
| 01/30/2008 | CN201013317Y Beam-balancing pumping unit |
| 01/30/2008 | CN201013316Y Low-noise pumping unit |
| 01/30/2008 | CN201013315Y Multifunctional down-hole hydraulic oil extraction equipment |
| 01/30/2008 | CN201013314Y Enclosed storied building type balance box beam-pumping unit |
| 01/30/2008 | CN201013313Y Annular tube self-sealing quantitative oil dredger |
| 01/30/2008 | CN201013312Y Oil extraction load simulator |
| 01/30/2008 | CN201013305Y High-pressure injection gate leak-proof switching device |
| 01/30/2008 | CN201013300Y Reverse-filling proof water-repellent flow well completion string and device |
| 01/30/2008 | CN201013288Y Steam-injection oil extraction dual-purpose mine mouth device |
| 01/30/2008 | CN201013256Y Casing joint for heavy crude thermal production well |
| 01/30/2008 | CN101115906A Composition and method for making a proppant |
| 01/30/2008 | CN101113945A Oil gas well high-energy gas air-pumping medicament experiment evaluating device |
| 01/30/2008 | CN101113671A Underground catalytic gasification process of coal |
| 01/30/2008 | CN101113670A Coal underground gasifying technology |
| 01/30/2008 | CN101113669A Fracturing process for enhancing low permeability reservoir deliverability |
| 01/30/2008 | CN101113668A Method for enhancing offshore oilfield recovery |
| 01/30/2008 | CN101113667A Method for processing spherical gravel under petroleum well |
| 01/30/2008 | CN101113666A Coal bed gas mining novel technology |
| 01/30/2008 | CN101113665A Integrated pumping unit |
| 01/30/2008 | CN100365279C Negative pressure oil-well pump |
| 01/29/2008 | US7324929 Method and system for simulating a hydrocarbon-bearing formation |
| 01/29/2008 | US7322420 Tubing expansion |
| 01/29/2008 | US7322419 Circulating sub and method |
| 01/29/2008 | US7322416 Methods of servicing a well bore using self-activating downhole tool |
| 01/29/2008 | US7322414 Crosslinkable-polymer compositions and associated methods |
| 01/29/2008 | US7322411 Method of stimulating oil and gas wells using deformable proppants |
| 01/29/2008 | US7322410 Controllable production well packer |
| 01/29/2008 | US7322409 Method and system for producing methane gas from methane hydrate formations |
| 01/29/2008 | CA2473015C Method and apparatus for treating a well |
| 01/29/2008 | CA2471212C Automated optical inspection of wire-wrapped well screens |
| 01/29/2008 | CA2466761C Optical position sensing for well control tools |
| 01/29/2008 | CA2448691C Expandable tubular having improved polished bore receptacle protection |
| 01/29/2008 | CA2356131C Downhole sealing for production tubing |
| 01/29/2008 | CA2320998C Method and system for drilling and completing underbalanced multilateral wells |
| 01/29/2008 | CA2316978C Method for drilling and completing a hydrocarbon production well |
| 01/29/2008 | CA2305720C Method and apparatus for hanging tubulars in wells |
| 01/29/2008 | CA2284639C Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 01/29/2008 | CA2239759C Method of assisted recovery of oil from an underground reservoir |
| 01/29/2008 | CA2187422C Downhole production well control system and method |