| 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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| 01/20/1987 | US4637461 Patterns of vertical and horizontal wells for improving oil recovery efficiency |
| 01/20/1987 | US4637458 Blowout preventer for use in combination with a deep well pump |
| 01/20/1987 | EP0071633A4 Offshore pollution control. |
| 01/20/1987 | CA1216860A1 Sulfonated tributylphenol ethoxylates, their use, and a process for preparing sulfonated alkoxylates |
| 01/20/1987 | CA1216747A1 Method for treating subterranean formations |
| 01/14/1987 | CN86104849A Process for avoiding the equipment of well-drilling to block up in the well |
| 01/14/1987 | CN86104803A Offshore hydrocarbon production system |
| 01/14/1987 | CN86104684A Separator of fluid with different specific gravity on ship to use |
| 01/13/1987 | US4636289 Multicompartment, direct current |
| 01/13/1987 | US4636145 Down-well pump device |
| 01/13/1987 | US4635734 Boosterless perforating gun and method of assembly |
| 01/13/1987 | US4635733 Gun firing system using fluid filled pressure balance tubing |
| 01/13/1987 | US4635728 Method and apparatus for connecting a tubular element to an underwater wellhead |
| 01/13/1987 | US4635725 Method and apparatus for gravel packing a well |
| 01/13/1987 | US4635724 CO2 -enhanced hydrocarbon recovery with corrosion-resistant cement |
| 01/13/1987 | US4635723 Continuous injection of corrosion-inhibiting liquids |
| 01/13/1987 | US4635721 Enhanced gas recovery from subterranean reservoirs |
| 01/13/1987 | US4635720 Heavy oil recovery process using intermittent steamflooding |
| 01/13/1987 | US4635719 Method for hydraulic fracture propagation in hydrocarbon-bearing formations |
| 01/13/1987 | US4635716 Gravel packer |
| 01/13/1987 | CA1216416A1 Method of increasing hydrocarbon production by remedial well treatment |
| 01/10/1987 | CN85101888A Enhanced oil recovery process by injecting a micellar solution of surfactants having a solubility gradient in water |
| 01/10/1987 | CN85101104A Preparation of sulphonates of glycidyl tributyl phenoxy ether and uses theseof |
| 01/07/1987 | EP0207668A1 Ceramic spheroids having low density and high crush resistance |
| 01/07/1987 | EP0207582A1 Flowline adjustable joint |
| 01/07/1987 | EP0207427A2 Improved stress-corrosion resistant proppant for oil and gas wells |
| 01/07/1987 | EP0207256A1 Methods and apparatus for separating gases and liquids from natural gas wellhead effluent |
| 01/07/1987 | CN86104635A 爆炸补偿器 Explosion compensator |
| 01/06/1987 | US4634187 Encapsulation |
| 01/06/1987 | US4633954 Well production controller system |
| 01/06/1987 | US4633953 Method for offshore production of hydrocarbons concurrently with the installation of a structure therefor |
| 01/06/1987 | US4633952 Multi-mode testing tool and method of use |
| 01/06/1987 | US4633951 Combustion gas generators using rocket fuel type propellants |
| 01/06/1987 | US4633948 Steam drive from fractured horizontal wells |
| 01/06/1987 | US4633947 Production of a polyacrylamide solution used in an oil recovery process |
| 01/06/1987 | US4633945 Permanent completion tubing conveyed perforating system |
| 01/06/1987 | US4633944 Gravel packer |
| 01/06/1987 | US4633943 Gravel packer |
| 01/06/1987 | CA1216307A1 Low cost, brine tolerant sulfonate and sulfate surfactants having 1,3-dihydrocarboxy-2-propyl hydrophobic tails |
| 01/06/1987 | CA1216275A1 Pulling head for removably engaging a conduit end |
| 01/06/1987 | CA1216229A1 Methods and apparatus for recovery of hydrocarbons from underground water tables |
| 01/06/1987 | CA1216150A1 Pour point depressants for paraffin solutions |
| 01/02/1987 | DE3523218A1 Well filter pipe and process for the production thereof |
| 12/31/1986 | CN85204405U Eight-stage oil-gas separator |
| 12/31/1986 | CN85104979A Method and apparatus for filtrating the flowage of the oil and gas well |
| 12/30/1986 | US4632876 Mineral core with aluminum or magnesium oxide shell |
| 12/30/1986 | US4632603 Marine riser base system |
| 12/30/1986 | US4632601 System and method for disposal of noncondensable gases from geothermal wells |
| 12/30/1986 | US4632432 Remote ball connector |
| 12/30/1986 | US4632406 Apparatus in which an annular ring is carried within a groove about one member for slidably engaging the cylindrical surface of another member |
| 12/30/1986 | US4632184 Submersible pump safety systems |
| 12/30/1986 | US4632034 Redundant detonation initiators for use in wells and method of use |
| 12/30/1986 | EP0207042A1 Method for the grit-free withdrawal of water from a well, and a device suitable therefor |
| 12/24/1986 | CN85105970A Mining equipment for soluble ore with flexible-pipe diversion unit |
| 12/24/1986 | CN85102931A Cartridge-container hanger using controlling pin |
| 12/23/1986 | US4631536 Multiplex submersible pump telemetry system |
| 12/23/1986 | US4630868 Process for solution mining |
| 12/23/1986 | US4630681 Multi-well hydrocarbon development system |
| 12/23/1986 | US4630678 In-situ formation of polyvalent metal ions for crosslinking polymers within carbonate rock-containing reservoirs |
| 12/23/1986 | US4630677 Fluid recovery system |
| 12/23/1986 | CA1215641A1 Miscible flooding with displacing fluid containing additive compositions |
| 12/23/1986 | CA1215640A1 Pneumatic transfer of solids into wells |
| 12/18/1986 | WO1986007468A1 Device for accurately positioning two geometrical axes which belong correspondingly to two elements |
| 12/18/1986 | WO1986007408A1 Method for the grit-free withdrawal of water from a well and also a device suitable therefor |
| 12/17/1986 | EP0205250A1 Improvements in subsurface device actuators |
| 12/17/1986 | EP0204823A1 Side pocket mandrel. |
| 12/16/1986 | USRE32304 Adding anti corrosive material to oil well; gravity system |
| 12/16/1986 | US4629009 Method and apparatus for firing borehole perforating apparatus |
| 12/16/1986 | US4629003 Guilelineless subsea completion system with horizontal flowline connection |
| 12/16/1986 | US4629001 Tubing pressure operated initiator for perforating in a well borehole |
| 12/16/1986 | US4628999 Hydrocarbon gas as diluent |
| 12/16/1986 | US4628997 Packoff |
| 12/16/1986 | US4628994 Oil wells |
| 12/16/1986 | US4628993 Foam gravel packer |
| 12/16/1986 | CA1215317A1 Selective steam foam soak oil recovery process |
| 12/16/1986 | CA1215316A1 Oil reclamation process |
| 12/16/1986 | CA1215315A1 Method and system for automatically raising product from a heated well |
| 12/10/1986 | EP0204358A2 Process for the preparation of an aqueous solution of a heteropolysaccharide |
| 12/09/1986 | USRE32302 Fracturing method for stimulation of wells utilizing carbon dioxide based fluids |
| 12/09/1986 | US4627495 Fracturing; enhanced oil recovery |
| 12/09/1986 | US4627493 Steamflood recovery method for an oil-bearing reservoir in a dipping subterranean formation |
| 12/09/1986 | US4627488 Isolation gravel packer |
| 12/09/1986 | CA1214989A1 Steam ignition and control of an oxygen-driven fire flood injection well |
| 12/09/1986 | CA1214988A1 Cyclical steam flooding method for viscous oil recovery |
| 12/03/1986 | EP0203230A1 Apparatus and method for manufacture and delivery of blasting agents |
| 12/02/1986 | US4626378 Use of fluorinated norbornylsiloxanes for defoaming freshly extracted degassing crude oil |
| 12/02/1986 | US4626360 Apparatus for separating sand and oil from a waste water stream |
| 12/02/1986 | US4626237 Method and apparatus for separating the components of a wellstream |
| 12/02/1986 | US4625941 Gas lift valve |
| 12/02/1986 | US4625807 Method and apparatus for recovery of water-immiscible liquids from water-bearing formations |
| 12/02/1986 | US4625806 Subsea drilling and production system for use at a multiwell site |
| 12/02/1986 | US4625805 Oil production installation for a subsea station of modular design |
| 12/02/1986 | US4625804 Remotely releasable template and dome |
| 12/02/1986 | US4625801 Methods and apparatus for recovery of hydrocarbons from underground water tables |
| 12/02/1986 | US4625800 Method of recovering medium or high gravity crude oil |
| 12/02/1986 | US4625798 Submersible pump installation, methods and safety system |
| 12/02/1986 | US4625797 Chemical injection tube mounting structure for a geothermal well |
| 12/02/1986 | US4625795 Geomechanical probe for a drilling well |
| 12/02/1986 | US4625744 Process and device for performing a series of hydrodynamic functions on a flow comprised of at least two phases |
| 12/02/1986 | US4625673 Motion compensation means for a floating production system |