| 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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| 04/20/1994 | CN1085632A Digital-control supercritical beam-pumping unit |
| 04/20/1994 | CN1085383A Efficient germicide for oil field water injection |
| 04/20/1994 | CN1024289C Underground screen pipe with protection frame adapted for horizontal or large inclined mine |
| 04/19/1994 | US5305211 Method for determining fluid-loss coefficient and spurt-loss |
| 04/19/1994 | US5304620 Method of crosslinking cellulose and guar derivatives for treating subterranean formations |
| 04/19/1994 | US5304073 Electrical connector and pump assembly utilizing same |
| 04/19/1994 | US5303772 Well completion apparatus |
| 04/19/1994 | CA2029203C Steam process with foam for recovering viscous oils through horizontal wells |
| 04/13/1994 | EP0592252A1 Reducing gas coning and fingering in a hydrocarbon-bearing formation |
| 04/13/1994 | CN2161720Y Testing instrument for determining vacuum insulating air-absorbing section |
| 04/13/1994 | CN2161719Y Separating element easy to flushing cascade |
| 04/13/1994 | CN1085292A Mast-type numerically-controlled oil pumping unit |
| 04/13/1994 | CN1085288A Method for producing high-strength alumina supporting agent |
| 04/13/1994 | CN1085175A Drive system for turning a swivel |
| 04/12/1994 | US5302294 Separation system employing degassing separators and hydroglyclones |
| 04/12/1994 | US5301760 Completing horizontal drain holes from a vertical well |
| 04/12/1994 | US5301755 Air chamber actuator for a perforating gun |
| 04/12/1994 | US5301749 Dual pump floating layer recovery apparatus |
| 04/10/1994 | CA2104084A1 Use of polyalkoxy sulfonates in hydrocarbon miscible oil recovery processes |
| 04/06/1994 | EP0590987A2 Determining orientation of a wellbore relative to formation stress fields |
| 04/06/1994 | EP0590805A1 Well completion by fracturing |
| 04/06/1994 | CN2160753Y Firing gas escape tube for high-energy gas pressing crack generator of oil-gas layer |
| 04/06/1994 | CN2160752Y Normally closed switch impact firing device |
| 04/06/1994 | CN1084936A Procedure and production pipe for production of oil or gas from an oil or gas reservoir |
| 04/06/1994 | CN1084935A Method of supplying gas to gas consumeng |
| 04/05/1994 | US5299887 In-situ process for remediating or enhancing permeability of contaminated soil |
| 04/05/1994 | US5299638 Process for transporting particles in a porous medium |
| 04/05/1994 | CA2021518C Liner isolation and well completion system |
| 04/05/1994 | CA1328317C Control of oilfield biofouling |
| 04/05/1994 | CA1328217C Carriage for mooring and connecting flexible lines on a base |
| 04/05/1994 | CA1328216C Device for positioning and removing a flexible line assembly |
| 03/31/1994 | WO1994006998A1 Hydraulic fracturing technique employing in situ precipitation |
| 03/31/1994 | WO1994006899A1 Detergent mixtures |
| 03/30/1994 | EP0589832A1 Process for deoxidising water |
| 03/30/1994 | EP0589591A1 Downhole fracture test and analysis |
| 03/30/1994 | EP0589586A2 Isolation washpipe for earth well completions and method for use in gravel packing a well |
| 03/30/1994 | EP0588879A1 Drilling mud compositions. |
| 03/30/1994 | CN2160015Y Electric heating device under oil production pump |
| 03/29/1994 | US5297943 Electrical submersible pump discharge head |
| 03/29/1994 | US5297633 For use in an enclosure |
| 03/29/1994 | US5297632 Method and apparatus for production of subsea hydrocarbon formations |
| 03/29/1994 | US5297629 Drill stem testing with tubing conveyed perforation |
| 03/29/1994 | US5297628 Simultaneous matrix acidizing using acids with different densities |
| 03/29/1994 | US5297627 Method for reduced water coning in a horizontal well during heavy oil production |
| 03/29/1994 | US5297626 Oil recovery process |
| 03/29/1994 | CA2106922A1 Plugged base pipe for sand control |
| 03/29/1994 | CA2049502C Rotor placer for progressive cavity pump |
| 03/25/1994 | CA2106921A1 Dedicated perforatable nipple with integral isolation sleeve |
| 03/23/1994 | EP0588421A1 Method and production pipe in an oil or gas reservoir |
| 03/22/1994 | US5296153 Method and apparatus for reducing the amount of formation water in oil recovered from an oil well |
| 03/22/1994 | US5296007 Process for removing sulfur from coal |
| 03/22/1994 | US5295848 Releasable hydraulic and/or electric connection for subsea equipment |
| 03/22/1994 | US5295810 Apparatus for compressing a fluid |
| 03/22/1994 | US5295763 Method for controlling gas migration from a landfill |
| 03/22/1994 | US5295547 Multiplexed electrohydraulic type of control system for use in undersea production system |
| 03/22/1994 | US5295546 Installation and method for the offshore exploitation of small fields |
| 03/22/1994 | US5295545 Method of fracturing wells using propellants |
| 03/22/1994 | US5295544 Decentralized casing hole puncher |
| 03/22/1994 | US5295542 Well gravel packing methods |
| 03/22/1994 | US5295540 Foam mixture for steam and carbon dioxide drive oil recovery method |
| 03/22/1994 | US5295539 Two well hydrocarbon producing method using multiple fractures |
| 03/22/1994 | US5295538 Sintered screen completion |
| 03/22/1994 | US5295537 Sand separating, producing-well accessory |
| 03/22/1994 | US5295393 Fracturing method and apparatus |
| 03/20/1994 | CA2104138A1 Horizontal well completions |
| 03/19/1994 | CA2078597A1 Method for optimizing steamflood performance |
| 03/17/1994 | WO1994005898A1 A method of increasing the productivity of oil and gas wells |
| 03/17/1994 | WO1994005897A1 Injection of mixtures into subterranean formations |
| 03/17/1994 | WO1994005892A1 Template and process for drilling and completing multiple wells |
| 03/17/1994 | WO1994005393A1 Slug flow mitigation for production well fluid gathering system |
| 03/16/1994 | EP0587464A1 Device for controlling and distributing a polyphase fluid |
| 03/16/1994 | EP0586992A1 Tube section having slots for sampling |
| 03/16/1994 | EP0586991A1 Apparatus and method for coupling elongated members |
| 03/15/1994 | US5294214 Gas eliminator for offshore oil transfer pipelines |
| 03/15/1994 | US5293941 Method of controlling flow in a soil venting well |
| 03/15/1994 | US5293940 Automatic tubing release |
| 03/15/1994 | US5293936 Optimum antenna-like exciters for heating earth media to recover thermally responsive constituents |
| 03/15/1994 | US5293935 Sintered metal substitute for prepack screen aggregate |
| 03/15/1994 | US5293931 Modular, multi-level groundwater sampler |
| 03/15/1994 | CA1327744C Single well injection and production system |
| 03/11/1994 | CA2105691A1 Compositions for reducing sludging during well acidizing |
| 03/09/1994 | EP0586223A2 Method of testing a production well and of perforating a new zone |
| 03/09/1994 | EP0586005A1 Method and apparatus for extracting a spilled fluid from a sub-surface of earth |
| 03/08/1994 | US5291956 Coiled tubing drilling apparatus and method |
| 03/08/1994 | US5291777 System for monitoring oil well performance |
| 03/08/1994 | CA1327538C Copolymers of (meth) acrylic acid esters as flow improvers in oils |
| 03/08/1994 | CA1327445C Process for preparing sulfur solvent compositions |
| 03/08/1994 | CA1327444C Oil recovery process using alkyl aryl polyalkoxyol sulfonate surfactants as mobility control agents |
| 03/03/1994 | WO1994004790A1 Protective arrangements for downhole tools |
| 03/03/1994 | WO1994004789A1 Downhole tandem pump system |
| 03/03/1994 | WO1994004761A1 Method and apparatus for in-situ treatment of landfill waste and contaminated soil |
| 03/03/1994 | DE4229185A1 Gathering energy from heat stored in ground - circulating heat transfer medium through closed circuit beneath ground to extract stored heat for driving turbine etc. |
| 03/02/1994 | EP0585142A2 Apparatus for selectively perforating multiple zones in a well |
| 03/02/1994 | EP0585096A1 Slug flow eliminator and separator |
| 03/02/1994 | EP0584762A2 Arrangement for removing infiltration water from gas collection wells in refuse dumps |
| 03/02/1994 | CN2157982Y Anti gas & sand apparatus for pumping well in oil field |
| 03/02/1994 | CN1083193A Device for mounting a flexible line comprising a curvature limiter |
| 03/02/1994 | CN1083182A Process for pumping a multi-phase gas-liquid mixture by means of the use of a pump |
| 03/02/1994 | CN1083164A Method of fracture acidizing subterranean formations |
| 03/01/1994 | US5290768 Welan gum-ethylene glycol insulating compositions |