| 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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| 03/17/1987 | US4649997 Carbon dioxide injection with in situ combustion process for heavy oils |
| 03/17/1987 | US4649994 Installation for bringing hydrocarbon deposits into production with reinjection of effluents into the deposit or into the well or wells |
| 03/17/1987 | US4649822 Method and apparatus for deactivating a partially flooded perforating gun assembly |
| 03/12/1987 | WO1987001551A1 Method and apparatus for reducing viscosity of high viscosity materials |
| 03/11/1987 | CN85106805A Sulfonate dimer surfactant cyclic steam stimulation process for recovering hydrocarbons from a subterranean formation |
| 03/10/1987 | US4648471 Control system for borehole tools |
| 03/10/1987 | US4648470 Firing head for a tubing conveyed perforating gun |
| 03/10/1987 | US4648458 Process for eliminating static venting of vapor-dominated geothermal wells |
| 03/10/1987 | US4648455 Method and apparatus for steam injection in subterranean wells |
| 03/10/1987 | US4648452 Injection of oil wells |
| 03/10/1987 | US4648450 Method of producing synthesis gas by underground gasification of coal using specific well configuration |
| 03/10/1987 | US4648449 Method of oil recovery |
| 03/10/1987 | CA1218837A1 Method of increasing oil recovery |
| 03/05/1987 | DE3531547A1 Method for extracting water from ground water-bearing strata, and design of a well for implementing this method |
| 03/04/1987 | EP0213095A2 Peroxygen breaker systems for well completion fluids |
| 03/04/1987 | EP0212811A1 Explosion compensator |
| 03/04/1987 | EP0211935A1 Method and apparatus for data transmission in a well bore containing a conductive fluid |
| 03/03/1987 | US4647603 Anionic polymer, vinylpyridine cationic polymer |
| 03/03/1987 | US4647254 Marine riser structural core connector |
| 03/03/1987 | US4646856 Downhole motor assembly |
| 03/03/1987 | US4646842 Retrievable well bore assembly |
| 03/03/1987 | US4646839 Method and apparatus for through-the-flowline gravel packing |
| 03/03/1987 | US4646836 Tertiary recovery method using inverted deviated holes |
| 03/03/1987 | US4646833 Flooding to recover oil from subterranean formations and employing injection of hot, low-viscosity polymer solution that becomes more viscous than the oil out in the formation |
| 03/03/1987 | US4646828 Apparatus for enhanced oil recovery |
| 03/03/1987 | US4646824 Patterns of horizontal and vertical wells for improving oil recovery efficiency |
| 02/25/1987 | EP0211492A2 Method and apparatus for reducing oil content of produced water by gas flotation |
| 02/25/1987 | EP0211288A2 A polysaccharide polymer made by xanthomonas |
| 02/24/1987 | US4645522 Separate hydrocarbon gas/liquid mixtures through expansion in turbines |
| 02/24/1987 | US4645005 Method of producing heavy oils |
| 02/24/1987 | US4645004 Electro-osmotic production of hydrocarbons utilizing conduction heating of hydrocarbonaceous formations |
| 02/24/1987 | US4645003 Patterns of horizontal and vertical wells for improving oil recovery efficiency |
| 02/24/1987 | US4644785 Hinged strain cell mounting apparatus |
| 02/24/1987 | CA1218295A1 Method and apparatus for producing viscous hydrocarbons from a subterranean formation |
| 02/24/1987 | CA1218234A1 Method and apparatus for separating gases and liquids from well-head gases |
| 02/24/1987 | CA1218227A1 Sulfonate dimer surfactant additives for steam foam drives and a process of stimulating hydrocarbon recovery from a subterranean formation |
| 02/19/1987 | DE3627314A1 Method and installation for injecting gas into an oil field or gas/oil field |
| 02/18/1987 | CN85106246A Enhanced oil recovery |
| 02/18/1987 | CN85104418A Stabilization of potassium silicate in clay |
| 02/18/1987 | CN85102151A Fracturing method for stimulation of wells utilizing carbon dioxide based fluids |
| 02/17/1987 | US4644020 Production of high molecular weight vinyl lactam polymers and copolymers |
| 02/17/1987 | US4643616 Device for positioning, activating and connecting modules of a sub-sea oil production station |
| 02/17/1987 | US4643614 Method and apparatus for the installation of a hose between a platform and a submerged buoy |
| 02/17/1987 | US4643612 Oil cleanup barge |
| 02/17/1987 | US4643258 Pump apparatus |
| 02/17/1987 | US4643257 Method of recovering hydrocarbons from an underground formation |
| 02/17/1987 | US4643256 Steam-foaming surfactant mixtures which are tolerant of divalent ions |
| 02/17/1987 | US4643252 Carbon dioxide miscible displacement process |
| 02/17/1987 | US4642987 Process and equipment for the utilization of geothermic energy |
| 02/17/1987 | CA1218014A1 Apparatus and method for transferring a bingham solid through a long conduit |
| 02/17/1987 | CA1217928A1 Micellar slug for oil recovery |
| 02/12/1987 | DE3528317A1 Process for conducting of decomposition gases in landfills |
| 02/10/1987 | US4641998 Underwater connection apparatus |
| 02/10/1987 | US4641710 Enhanced recovery of subterranean deposits by thermal stimulation |
| 02/10/1987 | US4641709 Controlling steam distribution |
| 02/10/1987 | US4641679 Feed device for a two-phase fluid pump and a hydrocarbon producing installation with such feed device |
| 02/10/1987 | CA1217716A Rotatable liner arrangement with tandem cone liner hanger |
| 02/10/1987 | CA1217630A Steam injection well gravel pack/prepack material of sintered bauxite |
| 02/04/1987 | EP0210964A1 Dry and/or wet one-atmosphere underwater system |
| 02/04/1987 | EP0210714A2 Telescoping joint |
| 02/04/1987 | CN86103990A Method for the grit-free withdrawal of water from a well and also a device suitable therefor |
| 02/04/1987 | CN85101901A Process for the enhanced oil recovery of underground mineral oil deposits |
| 02/03/1987 | USRE32343 Well safety valve |
| 02/03/1987 | US4640647 Offshore well apparatus and method |
| 02/03/1987 | US4640370 Perforating gun for initiation of shooting from bottom to top |
| 02/03/1987 | US4640362 Well penetration apparatus and method |
| 02/03/1987 | US4640360 Sonic cementing |
| 02/03/1987 | US4640359 Bitumen production through a horizontal well |
| 02/03/1987 | US4640357 Blocking fractures, flushing, flooding |
| 02/03/1987 | US4640356 Using hot water or steam flooding |
| 02/03/1987 | US4640355 Limited entry method for multiple zone, compressible fluid injection |
| 02/03/1987 | US4640352 In-situ steam drive oil recovery process |
| 02/03/1987 | CA1217436A1 Recirculating foam generator |
| 02/03/1987 | CA1217419A1 Flow line riser for offshore structure |
| 02/03/1987 | CA1217418A1 Magnetized drive fluids |
| 02/03/1987 | CA1217417A1 Apparatus and method for boosting pressure of natural gas flowing from a well |
| 02/03/1987 | CA1217330A1 Method of temporarily plugging portions of a subterranean formation using a diverting agent |
| 02/03/1987 | CA1217320A1 Diverting material and method of use for well treatment |
| 02/03/1987 | CA1217319A1 Low density proppant |
| 01/31/1987 | CN85108040A Preparation of non-solid phase well press liquid using methylene polyacrylamide |
| 01/31/1987 | CN85101675A Charge holder |
| 01/28/1987 | EP0210028A2 Gravel packer |
| 01/27/1987 | US4639427 Stress-corrosion resistant proppant for oil and gas wells |
| 01/27/1987 | US4639228 Rotating multi-path fluid manifold |
| 01/27/1987 | US4638864 Small well patterns |
| 01/27/1987 | US4638863 Well production method using microwave heating |
| 01/27/1987 | US4638862 Means and method for producing hydrocarbons from an earth formation during the RF retorting of a hydrocarbon stratum |
| 01/27/1987 | US4638859 Gravel packer |
| 01/27/1987 | US4638712 Bullet perforating apparatus, gun assembly and barrel |
| 01/27/1987 | CA1217127A1 Method of forming carbon dioxide mixtures miscible with formation crude oils |
| 01/21/1987 | EP0209343A2 Method of avoiding a drill string becoming stuck during drilling |
| 01/21/1987 | EP0209338A2 Apparatus for hydraulically releasing a tool string from a gravel screen |
| 01/21/1987 | EP0208981A2 A marine separator for fluids of different densities |
| 01/20/1987 | US4637990 Sintering, connecting, voids |
| 01/20/1987 | US4637478 Gravity oriented perforating gun for use in slanted boreholes |
| 01/20/1987 | US4637468 Method and apparatus for multizone oil and gas production |
| 01/20/1987 | US4637466 With noncondensible gas, decrease permeability in steam swept zones |
| 01/20/1987 | US4637465 Injections alkali or ammonium hydroxide, salt formation |
| 01/20/1987 | US4637464 In situ retorting of oil shale with pulsed water purge |
| 01/20/1987 | US4637462 Liquid mud ring control of underground liquids |