| 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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| 09/14/1988 | EP0281582A1 System for sensing ions in aqueous solution. |
| 09/14/1988 | CN88101274A Chain reciprocating oil pumping unit |
| 09/14/1988 | CN87213600U Arbitrary moving oil jet under well |
| 09/14/1988 | CN87105977A Method for treatmenting underground structural layer with coiler selectively |
| 09/14/1988 | CN87101671A Concentric double pipe stratified injection water technology |
| 09/13/1988 | US4770796 Enhanced oil recovery |
| 09/13/1988 | US4770563 Device for connecting lines associated with an offshore drilling equipment |
| 09/13/1988 | US4770336 Well screen centralizer and method for constructing centralizer and for joining of well screens |
| 09/13/1988 | US4770247 Subsea riser for multiple bore wells |
| 09/13/1988 | US4770246 Method and apparatus for firing borehole perforating apparatus |
| 09/13/1988 | US4770244 Downhole fixed choke for steam injection |
| 09/13/1988 | US4770243 Device for regulating the rate of flow of water which is separated from its mixture with hydrocarbons and reinjected into the bottom of the well |
| 09/13/1988 | US4770034 Method and apparatus for data transmission in a well bore containing a conductive fluid |
| 09/13/1988 | CA1241915A1 Device for connecting and disconnecting a movable tubular conduit inside a fixed tubular conduit |
| 09/13/1988 | CA1241914A1 Clamps |
| 09/13/1988 | CA1241829A1 Method of gravel packing a well |
| 09/13/1988 | CA1241826A1 Fracturing method for stimulation of wells utilizing carbon dioxide based fluids |
| 09/07/1988 | WO1988006674A1 Device for a pressure-relief system for processing equipment on offshore platforms |
| 09/07/1988 | EP0281481A1 A device for placing a radioactive source in a formation through which a borehole passes |
| 09/07/1988 | EP0281361A2 Shape charge carrier and method of assembling it |
| 09/07/1988 | CN87216773U Rotary drum type beam-pumping unit |
| 09/06/1988 | US4769161 Silicate-containing oil recovery compositions |
| 09/06/1988 | US4769156 Method and means to pump a well |
| 09/06/1988 | US4768984 Buoy having minimal motion characteristics |
| 09/06/1988 | US4768597 Well perforation device |
| 09/06/1988 | US4768595 Oil recovery apparatus using an electromagnetic pump drive |
| 09/06/1988 | US4768592 Enhanced oil recovery process |
| 09/06/1988 | US4768591 Steam quality apparatus |
| 09/06/1988 | CA1241546A1 Handling system for effecting a submerged coupling |
| 08/31/1988 | EP0280294A2 Test drill string for deep wells |
| 08/31/1988 | CN87100890A Conductively heating subterranean oil shale to create permeability and subsequently produce oil |
| 08/30/1988 | US4766958 Method of recovering viscous oil from reservoirs with multiple horizontal zones |
| 08/30/1988 | US4766957 Method and apparatus for removing excess water from subterranean wells |
| 08/30/1988 | CA1241273A1 Steam injection method |
| 08/30/1988 | CA1241272A1 Dual aquafer electrical heating of subsurface hydrocarbons |
| 08/30/1988 | CA1241271A1 Metal value recovery |
| 08/30/1988 | CA1241270A1 Firing head for a tubing conveyed perforating gun |
| 08/30/1988 | CA1241269A1 Borehole devices actuated by fluid pressure |
| 08/30/1988 | CA1241187A1 Method for controlling rock dissolution during oil well steam injection |
| 08/25/1988 | WO1988006209A1 Device for opening gas sources in refuse tips, and for exploring and cleansing materials for recycling and contaminated ground |
| 08/25/1988 | WO1988004352A3 Process for making a well |
| 08/25/1988 | DE3704935A1 Method and equipment for utilising the geothermal energy contained in a thermal well |
| 08/25/1988 | DE3703534A1 Method for producing a well |
| 08/24/1988 | CN87216970U Infrared heater for oil pump well opening |
| 08/24/1988 | CN87100828A Method of recovering oil |
| 08/23/1988 | US4766558 Method of calculating minimum miscibility pressure |
| 08/23/1988 | US4765410 Method and apparatus for cleaning wells |
| 08/23/1988 | US4765409 Automatic separation device for use with wireline conveyed perforating gun |
| 08/23/1988 | US4765408 Micellar slug for oil recovery |
| 08/23/1988 | US4765407 Method of producing gas condensate and other reservoirs |
| 08/23/1988 | US4765406 Method of and apparatus for increasing the mobility of crude oil in an oil deposit |
| 08/23/1988 | US4765403 Apparatus for placing and removing well flow control devices |
| 08/23/1988 | US4765173 Well penetration apparatus |
| 08/23/1988 | US4765144 Solar-powered Rankine cycle pumping engine |
| 08/23/1988 | CA1241055A1 Method and apparatus for data transmission in a well bore containing a conductive fluid |
| 08/17/1988 | CN88100555A Anhydrous crystal sodium salt of 5-chloro-3-(2-thenoyl)-2-oxyindole-1-carboxamide |
| 08/16/1988 | US4763734 Earth drilling method and apparatus using multiple hydraulic forces |
| 08/16/1988 | US4763730 Miscible gas enhanced oil recovery method using oil-brine compatible pre-formed foam |
| 08/16/1988 | US4763520 Method and means for obtaining data representing a parameter of fluid flowing through a down hole side of an oil or gas well bore |
| 08/16/1988 | CA1240615A1 Method for placing ball sealers onto casing perforations in a deviated wellbore |
| 08/16/1988 | CA1240614A1 Permanent completion tubing conveyed perforating system |
| 08/16/1988 | CA1240485A1 Process for inhibiting hydrates with inorganic electrolytes while producing moist co.sub.2 from subterranean reservoir |
| 08/11/1988 | WO1988005656A1 Anhydrous, crystalline sodium salt of 5-chloro-3-(2-thenoyl)-2-oxindole-1-carboxamide |
| 08/10/1988 | EP0277840A2 Modular near-surface completion system |
| 08/10/1988 | EP0277738A1 Anhdrous, crystalline sodium salt of 5-chloro-3-(2-thenoyl)-2-oxindole-1-carboxamide |
| 08/09/1988 | US4762543 For flooding |
| 08/09/1988 | US4762540 Noise suppression and particle separation apparatus for high pressure gaseous fluid flows |
| 08/09/1988 | US4762473 Pumping unit drive system |
| 08/09/1988 | US4762180 Modular near-surface completion system |
| 08/09/1988 | US4762179 For detonating an explosive contained in a subterranean well |
| 08/09/1988 | US4762178 Oil recovery with water containing carbonate salt and CO2 |
| 08/09/1988 | US4762176 Air-water separator |
| 08/09/1988 | US4762067 Downhole perforating method and apparatus using secondary explosive detonators |
| 08/09/1988 | CA1240309A1 Method for drilling deviated wellbores |
| 08/09/1988 | CA1240263A1 Combined replacement drive process for oil recovery |
| 08/09/1988 | CA1240262A1 Recovery of oil by in situ hydrogenation |
| 08/09/1988 | CA1240261A1 Fluid lift system |
| 08/03/1988 | EP0276228A1 Two stage pump sampler |
| 08/03/1988 | CN88200317U Oil extraction technological device with hallow rod |
| 08/03/1988 | CN87205435U Hetrotype travelling beam type oil extractor |
| 08/03/1988 | CN87108005A Steam injection profiling |
| 08/02/1988 | US4761228 Magnetic fluid conditioner |
| 08/02/1988 | US4761225 Apparatus for controlling the removal of liquid hydrocarbons from groundwater |
| 08/02/1988 | US4761182 Process for using sludge from geothermal brine to make concrete and concrete composition |
| 08/02/1988 | US4761120 Well pumping unit and control system |
| 08/02/1988 | US4760884 Air chamber actuated dual tubing release assembly |
| 08/02/1988 | US4760883 For perforating mineral producing zone in a wellbore |
| 08/02/1988 | CA1239869A1 Groundwater monitoring system |
| 08/02/1988 | CA1239868A1 Apparatus for recovery of liquid hydrocarbons from groundwater |
| 08/02/1988 | CA1239867A1 Well treating method and system for stimulating recovery of fluids |
| 08/02/1988 | CA1239866A1 Formation stimulating tool with anti-acceleration provisions |
| 07/27/1988 | EP0275624A1 Encapsulated breaker for crosslinked acid gel, fracture acidizing fluid containing same and method of use thereof |
| 07/27/1988 | EP0275304A1 Calcium-free clear high density fluids. |
| 07/26/1988 | US4759408 Method of shutting off a portion of a producing zone in a hydrocarbon producing well |
| 07/26/1988 | US4759291 Through bulkhead explosive initiator for oil well usage |
| 07/26/1988 | CA1239547A1 Method for the determination of at least one value caracterizing a geological formation, to wit the hardness of said formation |
| 07/20/1988 | EP0274806A1 Method of recovering oil |
| 07/20/1988 | CN87216979U Energy-saving sliding beam type pumping unit |
| 07/20/1988 | CN87100161A Drilling hydraulic mining fixed-point producing method for salt deposit |
| 07/20/1988 | CN86108916A Well penetration apparatus and method |