| 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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| 07/02/1985 | US4526947 With N-methylolacrylamide and sodium styrene sulfonate |
| 07/02/1985 | US4526692 Pumping water through well head and water treatment unit and returning water through wellhead |
| 07/02/1985 | US4526633 Formulating and delivery system for emulsion blasting |
| 07/02/1985 | US4526615 Impermeable pad having reservoirs for ore for leaching, means for introducing leach solution |
| 07/02/1985 | US4526233 Releasable coupling for tubing conveyed subterranean well perforating gun |
| 07/02/1985 | US4526228 Apparatus for operating a gas and oil producing well |
| 07/01/1985 | EP0133439A4 Apparatus and method for heating, thawing and/or demoisturizing materials and/or objects. |
| 06/26/1985 | EP0146461A1 Device comprising a floating, water-tight, reversible and remotely controlled connector, especially for under-water conduits |
| 06/26/1985 | EP0146365A2 Conductor guide arrangements for offshore well platforms |
| 06/26/1985 | EP0145823A1 Apparatus for mixing solids and fluids |
| 06/26/1985 | EP0145754A1 A method for removal of water from drill holes during deep drilling and a device for performing the method |
| 06/25/1985 | US4525496 Self-inverting water-in-oil emulsions of water-soluble polymers |
| 06/25/1985 | US4525101 Drill string deployment of cable pulling tool |
| 06/25/1985 | US4524827 Single well stimulation for the recovery of liquid hydrocarbons from subsurface formations |
| 06/25/1985 | US4524826 Method of heating an oil shale formation |
| 06/25/1985 | CA1189649A1 Water soluble copolymers |
| 06/25/1985 | CA1189444A1 Additive for inclusion in a heavy oil reservoir undergoing steam injection |
| 06/20/1985 | WO1985002652A1 Floating coupling sleeve apparatus for a sealed, reversible and telecontrolled connection of pipes, particularly immersed pipes |
| 06/19/1985 | EP0145214A1 Marine structure having flow conduits and method of installing such conduits |
| 06/18/1985 | US4524434 In a mineral recovery program |
| 06/18/1985 | US4523650 Explosive safe/arm system for oil well perforating guns |
| 06/18/1985 | US4523649 Rotational alignment method and apparatus for tubing conveyed perforating guns |
| 06/18/1985 | US4523643 Well perforating and completion apparatus and associated method |
| 06/18/1985 | US4523642 Oil recovery process employing CO2 produced in situ |
| 06/18/1985 | US4523641 Liner hanger with channel guides |
| 06/18/1985 | US4523432 Air storage power station |
| 06/12/1985 | EP0144203A2 Recovery and reforming of ultra heavy tars and oil deposits |
| 06/11/1985 | US4522732 Process for recovering petroleum from a geological formation |
| 06/11/1985 | US4522731 Hydraulic fracturing propping agent |
| 06/11/1985 | US4522264 Apparatus and method for treating wells |
| 06/11/1985 | US4522263 Stem drive oil recovery method utilizing a downhole steam generator and anti clay-swelling agent |
| 06/11/1985 | US4522262 Single well electrical oil stimulation |
| 06/11/1985 | US4522260 Method for creating a zone of increased permeability in hydrocarbon-containing subterranean formation penetrated by a plurality of wellbores |
| 06/11/1985 | US4522258 Unitized well testing apparatus for use in hostile environments |
| 06/11/1985 | CA1188631A1 Multiphase separator |
| 06/11/1985 | CA1188611A1 In-situ combustion method for controlled thermal linking of wells |
| 06/11/1985 | CA1188610A1 Vertical fracture growth control |
| 06/04/1985 | US4521579 Enhanced oil recovery using anionic surfactants based on acrylamide and unsaturated sulfanates; stable in brines |
| 06/04/1985 | US4520837 Cover retainer |
| 05/29/1985 | EP0143007A1 In situ leaching process |
| 05/28/1985 | US4519726 Flow line riser for offshore structure |
| 05/28/1985 | US4519725 Offshore structure incorporating a conductor deflecting system |
| 05/28/1985 | US4519463 Drainhole drilling |
| 05/28/1985 | US4519455 Fracturing method for stimulation of wells utilizing carbon dioxide based fluids |
| 05/28/1985 | US4519454 Enhanced oil recovery; producing a solvent-crude mixture |
| 05/28/1985 | US4519451 Well treating equipment and methods |
| 05/28/1985 | US4519313 Charge holder |
| 05/28/1985 | CA1187904A1 Oxyalkylated addition products from ethylene oxidepropylene oxide block polymers and bis-glycidyl ethers and their use |
| 05/28/1985 | CA1187868A1 Guideline system for positioning subsea equipment |
| 05/21/1985 | US4518399 Methane and carbon dioxide |
| 05/21/1985 | US4518261 Equipment for dissolving polyacrylamide powder for obtaining an aqueous solution thereof for enhanced oil recovery |
| 05/21/1985 | US4518042 Subsea wellhead connection assembly |
| 05/21/1985 | US4518040 Method of fracturing a subterranean formation |
| 05/21/1985 | US4518039 Novolak-coated particles, high strength, coupling, crosslinking |
| 05/21/1985 | US4518038 Method of extracting and reutilizing surfactants from emulsions using sulfonated alkyl benzenes and ethoxylated phenols |
| 05/21/1985 | US4518036 Device for controlling a safety valve disposed below an activation pump in a hydrocarbon production well |
| 05/21/1985 | CA1187404A1 Method for reducing the permeability of underground strata during secondary recovery of oil |
| 05/21/1985 | CA1187275A1 Production of hydrocarbons from hydrates |
| 05/15/1985 | EP0141542A2 A downhole tool |
| 05/14/1985 | USRE31881 Setting tools and liner hanger assembly |
| 05/14/1985 | US4516986 Two-phase flow splitter |
| 05/14/1985 | US4516932 Safety system intended in particular to elminate entrained or condensed liquids, and to limit the heat radiation when flaring or dispersing hydrocarbon gases |
| 05/14/1985 | US4516882 Method and apparatus for conversion of semi-submersible platform to tension leg platform for conducting offshore well operations |
| 05/14/1985 | US4516636 Injection of surfactant and driving gas |
| 05/14/1985 | US4516635 Method of extracting and reutilizing surfactants from emulsions with sulfonated alkyl benzenes and alcohols |
| 05/14/1985 | CA1186987A1 Hydraulic process for fracturing a geological deposit in a given direction |
| 05/14/1985 | CA1186883A1 Breaker system for hydraulic fracturing fluids |
| 05/09/1985 | WO1985001927A1 Offshore oil production method |
| 05/07/1985 | US4515701 Low cost, brine tolerant sulfonate and sulfate surfactants having 1,3-dihydrocarboxy-2-propyl hydrophobic tails |
| 05/07/1985 | US4515608 Multi-chamber gas anchor |
| 05/07/1985 | US4515217 Perforating gun pressure activated sliding sleeve |
| 05/07/1985 | US4515215 Steam injection method with constant rate of heat |
| 05/07/1985 | US4515214 Method for controlling the vertical growth of hydraulic fractures |
| 05/07/1985 | US4515093 Method and apparatus for the recovery of hydrocarbons |
| 04/30/1985 | US4513822 Anchor seal assembly |
| 04/30/1985 | US4513821 Lowering CO2 MMP and recovering oil using carbon dioxide |
| 04/30/1985 | US4513820 Alkali metal and ammonium salts of sulfonates |
| 04/30/1985 | US4513819 Repeatedly injecting and shutting-in mixture of steam and solvent |
| 04/30/1985 | US4513817 Casing bore receptacle |
| 04/30/1985 | US4513815 System for providing RF energy into a hydrocarbon stratum |
| 04/30/1985 | US4513764 Valve |
| 04/30/1985 | US4513733 Oil field steam production and use |
| 04/30/1985 | CA1186242A1 Process and apparatus for recovering usable water and other materials from oil field mud/waste pits |
| 04/23/1985 | US4512721 Titanium of zirconium getter |
| 04/23/1985 | US4512418 Mechanically initiated tubing conveyed perforator system |
| 04/23/1985 | US4512406 Bar actuated vent assembly |
| 04/23/1985 | US4512405 Pneumatic transfer of solids into wells |
| 04/23/1985 | US4512403 In situ coal gasification |
| 04/23/1985 | US4512402 For facilitating the flow of oil in an oil well |
| 04/23/1985 | US4512401 Method for forming a cement annulus for a well |
| 04/23/1985 | US4512400 Injecting c2-c4 mixtures, and natural gas |
| 04/23/1985 | US4512365 Pilot valve for an oil and gas separator |
| 04/23/1985 | US4512188 Flow rate control and metering means for shear-sensitive liquids |
| 04/23/1985 | US4512155 Flowing geothermal wells and heat recovery systems |
| 04/23/1985 | CA1185912A1 Production of xanthan having a low pyruvate content |
| 04/23/1985 | CA1185894A1 Modular subsea oil extraction installation |
| 04/23/1985 | CA1185893A1 Apparatus and method for treatment of wells |
| 04/23/1985 | CA1185779A1 Aqueous wellbore service fluids |
| 04/23/1985 | CA1185778A1 Stable foams and methods of use |
| 04/23/1985 | CA1185777A1 Aqueous treatment fluid and method of use |