| 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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| 07/22/1987 | EP0229434A1 Process for the improvement of the conditioning of gasification agents utilized in an underground coal-gasification process |
| 07/22/1987 | EP0229209A1 Waste disposal with means for collecting and evacuating decomposition gases |
| 07/21/1987 | US4682070 Downhole oil well vibrating system |
| 07/21/1987 | US4681245 Method and apparatus for dispensing oil well proppant additive |
| 07/21/1987 | US4681173 Method and apparatus for drilling a group of subsea wells |
| 07/21/1987 | US4681163 Sand control system |
| 07/21/1987 | US4681161 Well screen centralizer and method for constructing centralizer and for joining of well screens |
| 07/21/1987 | US4681159 Setting tool for a well tool |
| 07/21/1987 | US4681037 Tanged charge holder |
| 07/21/1987 | CA1224409A1 Miscible displacement drive for enhanced oil recovery in low pressure reservoirs |
| 07/21/1987 | CA1224408A1 Device for delivering flowable material |
| 07/21/1987 | CA1224330A1 Method for immobilizing contaminants in previously leached ores |
| 07/15/1987 | EP0228891A2 Method of completing production wells for the recovery of gas from coal seams |
| 07/14/1987 | US4680230 Hydraulic fracturing |
| 07/14/1987 | US4679632 Remotely controlled riser connection |
| 07/14/1987 | US4679630 Method of completing production wells for the recovery of gas from coal seams |
| 07/14/1987 | US4679629 Method for modifying injectivity profile with ball sealers and chemical blocking agents |
| 07/14/1987 | US4679627 Method of oil recovery |
| 07/14/1987 | US4679626 Energy efficient process for viscous oil recovery |
| 07/14/1987 | US4679598 Subsea pipeline bundle |
| 07/14/1987 | CA1224164A1 Electrode supporting conduit tube for electrical heating of underground hydrocarbon resources |
| 07/14/1987 | CA1224139A1 Pressure responsive explosion initiator with time delay and method of use |
| 07/14/1987 | CA1224024A1 Diverting agents for steamfloods |
| 07/14/1987 | CA1224023A1 Inhibiting silica dissolution during injection of steam into a reservoir |
| 07/08/1987 | EP0228262A2 Double cylinder screen |
| 07/08/1987 | EP0228196A2 Composition and method for temporarily reducing the permeability of subterranean formations |
| 07/07/1987 | US4678044 Tubing pressure operated initiator for perforating in a well borehole |
| 07/07/1987 | US4678040 Methods and apparatus for recovery of hydrocarbons and other liquids from underground |
| 07/07/1987 | US4678039 Method and apparatus for secondary and tertiary recovery of hydrocarbons |
| 07/07/1987 | US4678037 Method and apparatus for completing a plurality of zones in a wellbore |
| 07/07/1987 | US4678036 Miscible oil recovery process |
| 07/07/1987 | US4678033 Introducing microbes into a subterranean formation |
| 07/07/1987 | CA1223833A1 Recycled fatty acid crude petroleum recovery system |
| 07/07/1987 | CA1223808A1 Method for operating an injection well in an in-situ combustion oil recovery process using oxygen |
| 07/07/1987 | CA1223806A1 Method and apparatus for the recovery of hydrocarbons |
| 07/07/1987 | CA1223702A1 Hospital bed |
| 07/01/1987 | EP0227456A2 Earth well drilling apparatus |
| 07/01/1987 | EP0227291A1 Process for drilling geothermal wells with removal of H2S |
| 07/01/1987 | EP0227191A2 Steam profile liquid/vapour separator |
| 07/01/1987 | CN86108326A Process for increasing the degree of oil extraction |
| 07/01/1987 | CN86107208A Improved multiple-stage coal seam fracing method |
| 06/30/1987 | US4676696 Apparatus for installing a flowline section near the seabed |
| 06/30/1987 | US4676695 Method for preventing thaw settlement along offshore artic pipelines |
| 06/30/1987 | US4676316 Method and composition for oil recovery by gas flooding |
| 06/30/1987 | US4676315 Method for concentrating surfactant from a brine solution |
| 06/30/1987 | US4676314 Method of recovering oil |
| 06/30/1987 | US4676313 For extracting a mineral from an earth formation |
| 06/30/1987 | US4676309 Linear plane perforator |
| 06/30/1987 | US4676308 Down-hole gas anchor device |
| 06/24/1987 | CN85108889A Process for petroleum recovery using surfactant additives of alpha-olefinic sulfonate and its oligomer |
| 06/23/1987 | USRE32441 Side pocket mandrel and method of construction |
| 06/23/1987 | US4674920 Subsea well template levelling system |
| 06/23/1987 | US4674446 Gas dehydrator with gas recovery system |
| 06/18/1987 | WO1987003643A1 Process for increasing the degree of oil extraction |
| 06/18/1987 | WO1987003623A1 An electrolytic process for the simultaneous deposition of gold and replenishment of elemental iodine |
| 06/16/1987 | US4673890 Well bore measurement tool |
| 06/16/1987 | US4673500 Sand separation and removal method and apparatus |
| 06/16/1987 | US4673484 Amphiphilic phase behavior separation of carboxylic acids/hydrocarbon mixtures in recovery of oil from tar sands or the like |
| 06/16/1987 | US4673338 Travelling barrel down hole pump having a gas relief probe |
| 06/16/1987 | US4673313 Marine production riser and method for installing same |
| 06/16/1987 | US4673039 Oil and gas; produce formation fluids into conduit |
| 06/16/1987 | US4673033 Tubing conveyed perforating assembly safety device |
| 06/16/1987 | US4672845 Polish rod temperature sensing system and rod stroking control |
| 06/16/1987 | EP0225661A2 Gelling organic liquids |
| 06/16/1987 | EP0225359A1 Device for accurately positioning two geometrical axes which belong correspondingly to two elements |
| 06/16/1987 | CA1222945A1 Subsea flowline connector |
| 06/16/1987 | CA1222943A1 Process and apparatus for purification of contaminated groundwater |
| 06/16/1987 | CA1222942A1 Multiple-stage coal seam fracturing method |
| 06/10/1987 | EP0224474A1 Water soluble perforation pack. |
| 06/09/1987 | US4671909 Method for making hollow porous microspheres |
| 06/09/1987 | US4671833 Polyfluoroolefin polymer sleeves as protective coat against sulfur melts |
| 06/09/1987 | US4671704 Coastal installation for loading or unloading liquid at cryogenic temperature |
| 06/09/1987 | US4671702 Flowline connection means |
| 06/09/1987 | US4671361 Method and apparatus for hydraulically releasing from a gravel screen |
| 06/02/1987 | US4670634 In situ decontamination of spills and landfills by radio frequency heating |
| 06/02/1987 | US4670166 Leaching or water soluble reagent from polymer matrix |
| 06/02/1987 | US4670148 Apparatus and method for withdrawing gaseous decomposition products from a refuse dump |
| 06/02/1987 | US4669916 Unitized TLP anchor template with elevated well template |
| 06/02/1987 | US4669546 Method to improve vertical hydraulic fracturing in inclined wellbores |
| 06/02/1987 | US4669542 Air injection |
| 06/02/1987 | US4669538 Double-grip thermal expansion screen hanger and running tool |
| 06/02/1987 | US4669536 Groundwater monitoring system |
| 06/02/1987 | CA1222535A1 Apparatus in which an annular ring is carried within a groove about one member for slidably engaging the cylindrical surface of another member |
| 06/02/1987 | CA1222445A1 Tar sand production using thermal stimulation |
| 06/02/1987 | CA1222444A1 Method of firing perforating gun and simultaneously recording downhole pressure |
| 05/27/1987 | EP0223666A1 Apparatus and method for installing and for remotely connecting the end of an elongated member to a connector |
| 05/27/1987 | CN86106505A Down-hole gas anchor device |
| 05/26/1987 | US4668645 Sintered low density gas and oil well proppants from a low cost unblended clay material of selected composition |
| 05/26/1987 | US4667739 Thermal drainage process for recovering hot water-swollen oil from a thick tar sand |
| 05/26/1987 | US4667738 Oil and gas production enhancement using electrical means |
| 05/26/1987 | US4667735 Fluid pressure activated firing head for providing clean fluid |
| 05/20/1987 | CN86107891A Oil repellent system with surfactant |
| 05/20/1987 | CN85108287A Cylindrical screen and method for mfg. the same |
| 05/19/1987 | US4666476 Different densities from a mixture |
| 05/19/1987 | US4666212 Metal value recovery |
| 05/19/1987 | US4666187 Device for connecting and disconnecting hoses or pipes to and from difficultly accessible structures |
| 05/19/1987 | US4665990 Multiple-stage coal seam fracing method |
| 05/19/1987 | US4665989 Well production start up method |
| 05/19/1987 | US4665984 Method of measuring crustal stress by hydraulic fracture based on analysis of crack growth in rock |
| 05/19/1987 | US4665982 Formation fracturing technique using liquid proppant carrier followed by foam |