| 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) |
|---|
| 05/03/1988 | US4741401 Injection controlled release capsules containing breaker |
| 05/03/1988 | US4741399 Oil recovery process utilizing gravitational forces |
| 05/03/1988 | US4741398 Pressurization of waste gas with high pressure brine |
| 05/03/1988 | US4741397 Jet pump and technique for controlling pumping of a well |
| 05/03/1988 | US4741208 Pump differential pressure monitor system |
| 05/03/1988 | CA1236128A1 Hydraulic mining method |
| 05/03/1988 | CA1236005A1 Method for producing viscous hydrocarbons from discrete segments of a subterranean layer |
| 05/03/1988 | CA1236004A1 Method of extracting uranium ore |
| 04/28/1988 | DE3734537A1 Filter well |
| 04/27/1988 | EP0264867A1 Styrylaryloxy-ether sulfonates, process for their preparation and their use in petroleum recovery |
| 04/26/1988 | US4739839 Capsule charge perforating system |
| 04/26/1988 | US4739832 Method for improving high impulse fracturing |
| 04/26/1988 | US4739830 Acoustic Emission/Microseismic Activity |
| 04/26/1988 | US4739707 For use in a perforating gun |
| 04/26/1988 | CA1235652A1 Method for obtaining horizontal fractures in an oil reservoir |
| 04/26/1988 | CA1235651A1 Shaped charge carrier assembly |
| 04/20/1988 | CN87104623A Hydraulic motor driven dual balancing type oil pumping unit |
| 04/19/1988 | US4738897 Polymer article and its use for controlled introduction of reagent into a fluid |
| 04/19/1988 | US4738779 Cyclone separator |
| 04/19/1988 | US4738727 Process for the preparation of an aqueous solution of a heteropolysaccharide |
| 04/19/1988 | US4738695 Gas removal system |
| 04/19/1988 | US4738567 Compliant jacket for offshore drilling and production platform |
| 04/19/1988 | US4738319 Apparatus and method for use in subsurface oil and gas well perforating device |
| 04/19/1988 | US4738313 Optimizing the production of well fluids |
| 04/19/1988 | CA1235373A1 Enhanced steam drive recovery of heavy oil |
| 04/14/1988 | DE3734075A1 Verfahren zur verdraengung von oelen aus unterirdischen lagerstaetten mit einem dampfhaltigen medium Method of displacing grease the from underground reservoirs with a vapor-containing medium |
| 04/13/1988 | EP0263772A2 Pump differential pressure monitor system |
| 04/13/1988 | EP0263722A2 Casing guide for well template |
| 04/13/1988 | CN86209569U Machine for extracting oil depending on pressure |
| 04/12/1988 | USRE32642 Pipe base well screen and system for joining a plurality of well screen segments |
| 04/12/1988 | US4737282 Apparatus for separating sand and oil from a waste water stream |
| 04/12/1988 | US4737168 Separator tank containing hood |
| 04/12/1988 | US4736794 Method for the sonic cementing of down hole well casings |
| 04/12/1988 | US4736793 Injection of a miscible displacing fluid |
| 04/12/1988 | US4736792 Pretreatment with a gas before steam injection |
| 04/12/1988 | US4736791 Subsurface device actuator requiring minimum power |
| 04/12/1988 | US4736627 Steam profile liquid/vapor separator |
| 04/12/1988 | CA1235060A1 Process for production of oil and gas through horizontal drainholes from underground workings |
| 04/12/1988 | CA1235059A1 Redundant detonation initiators for use in wells and method of use |
| 04/06/1988 | EP0262822A2 Releasable connection for conduit string |
| 04/05/1988 | US4735267 Flexible production riser assembly and installation method |
| 03/30/1988 | EP0261291A1 Apparatus for shock protection in boreholes |
| 03/29/1988 | US4733991 Adjustable riser top joint and method of use |
| 03/29/1988 | US4733729 Injecting, straining slurry |
| 03/29/1988 | US4733727 Carbon dioxide; high-pressure subterranean injection |
| 03/29/1988 | US4733726 Method of improving the areal sweep efficiency of a steam flood oil recovery process |
| 03/29/1988 | US4733725 Single well test for evaluating CO2 injection |
| 03/29/1988 | US4733724 Steam injection after soluble and insoluble gases |
| 03/29/1988 | US4733723 Gravel pack assembly |
| 03/29/1988 | CA1234541A1 Remote ball connector |
| 03/29/1988 | CA1234539A1 Pressure differential mining tool |
| 03/24/1988 | WO1988002109A1 System for sensing ions in aqueous solution |
| 03/23/1988 | EP0260902A2 Sequential hydraulic fracturing |
| 03/23/1988 | EP0260878A2 Apparatus for disconnecting conduit string |
| 03/23/1988 | EP0260727A2 Matched particle/liquid density well packing technique |
| 03/23/1988 | EP0260278A1 Nitrogen injection |
| 03/22/1988 | US4732920 High strength particulates |
| 03/22/1988 | US4732215 Subsea oil production system |
| 03/22/1988 | US4732211 Annulus pressure operated vent assembly |
| 03/22/1988 | CA1234351A1 Tar sands treatment |
| 03/17/1988 | DE3728738A1 Exchange process for oil and gas deposits |
| 03/16/1988 | CN87213127U Itense magnetic water flooding device |
| 03/16/1988 | CN87105369A Adjustable out-of-phase crank balanced oil extractor and related method |
| 03/15/1988 | USRE32623 Curved offshore well conductors |
| 03/15/1988 | US4730851 Downhole expandable casting hanger |
| 03/15/1988 | US4730676 Downhole foam generator |
| 03/15/1988 | US4730673 Heated brine secondary recovery process |
| 03/15/1988 | US4730672 Method of removing and controlling volatile contaminants from the vadose layer of contaminated earth |
| 03/15/1988 | US4730671 Viscous oil recovery using high electrical conductive layers |
| 03/15/1988 | US4730634 Method and apparatus for controlling production of fluids from a well |
| 03/09/1988 | CN87207256U Dual balance vertical cylindrical oil-pumping machine by hydraulic transmission |
| 03/08/1988 | US4729694 TLP marine riser tensioner |
| 03/08/1988 | US4729431 Oil recovery by quenched in situ combustion |
| 03/08/1988 | CA1233841A1 Foam process for recovering underground rock fragments |
| 03/08/1988 | CA1233779A1 Method of extracting and reutilizing surfactants from emulsions |
| 03/08/1988 | CA1233668A1 Torque measuring device |
| 03/02/1988 | EP0257155A1 Gun initiation and data recording downhole |
| 03/02/1988 | CN87205931U Level-pressure contant current device for capillary tube |
| 03/01/1988 | US4728438 Secondary silica removal |
| 03/01/1988 | US4728152 Borehole extraction of minerals |
| 03/01/1988 | US4727938 Trona-enhanced steam foam oil recovery process |
| 03/01/1988 | US4727937 Steamflood process employing horizontal and vertical wells |
| 03/01/1988 | US4727936 Recovery and control system for leachate collection |
| 03/01/1988 | CA1233409A1 Co.sub.2-enhanced hydrocarbon recovery with corrosion-resistant cement |
| 03/01/1988 | CA1233408A1 Process for plugging a subterranean formation |
| 03/01/1988 | CA1233407A1 Firing system for tubing conveyed perforating gun |
| 02/25/1988 | DE3722711A1 Verbessertes oelgewinnungsverfahren mit mischbarem gas unter verwendung eines mit oel und sole vertraeglichen, vorgeformten schaumes Improved oelgewinnungsverfahren compatible with miscible gas using a general with oel and sole, preformed foam |
| 02/24/1988 | EP0256727A2 Apparatus for perforating a well casing |
| 02/24/1988 | EP0256723A2 Pressure assist detonating bar |
| 02/24/1988 | EP0256572A2 Matched particle/liquid density well packing technique |
| 02/24/1988 | EP0256178A1 Method and apparatus for controlling borehole pressure in perforating wells |
| 02/24/1988 | EP0256177A1 Spar buoy construction having production and oil storage facilities and method of operation |
| 02/24/1988 | CN86204321U Oil. pumping unit for flexible lifting system |
| 02/23/1988 | US4727489 Apparatus for analyzing the annulus effluent of a well |
| 02/23/1988 | US4726610 Annulus pressure firer mechanism with releasable fluid conduit force transmission means |
| 02/23/1988 | US4726431 Well perforating apparatus and method |
| 02/23/1988 | US4726425 Combination landing unit and seal assembly |
| 02/23/1988 | US4726420 Oil well pumping system |
| 02/23/1988 | US4726419 Single zone gravel packing system |
| 02/23/1988 | US4726219 Method and system for determining fluid pressures in wellbores and tubular conduits |