| 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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| 03/04/1980 | US4191252 Aromatic solvent, steam distillation, petroleum sulfonates |
| 03/04/1980 | US4191251 Process for recovering carbonaceous values from in situ oil shale retorting |
| 03/04/1980 | CA1073081A1 Downhole pump speed control |
| 03/04/1980 | CA1072879A1 Process for water treatment in mobility controlled caustic flooding process |
| 03/04/1980 | CA1072878A1 Method of treating formation to remove ammonium ions |
| 03/04/1980 | CA1072877A1 Method for forming a non-dissoluble sand control pack and a sand control pack made thereby |
| 03/04/1980 | CA1072856A1 Hydraulic control system underflow valve control method and apparatus |
| 02/26/1980 | US4190718 Suspension polymerization in saturated aliphatic hydrocarbon containing controlled amount of water |
| 02/26/1980 | US4190120 Moveable guide structure for a sub-sea drilling template |
| 02/26/1980 | US4190114 Subsea wellhead apparatus |
| 02/26/1980 | US4189923 Geothermal energy recovery |
| 02/26/1980 | CA1072454A1 Filtering device with v-shaped belt, and packing with glass balls |
| 02/26/1980 | CA1072442A1 Method and apparatus in situ recovery of bituminous hydrocarbons from tarsands |
| 02/20/1980 | EP0008283A2 Separator for use in boreholes of limited diameter |
| 02/19/1980 | US4189185 Method for producing chambered blast holes |
| 02/19/1980 | US4189184 Rotary drilling and extracting process |
| 02/19/1980 | US4189003 Method of completing wells in which the lower tubing is suspended from a tubing hanger below the wellhead and upper removable tubing extends between the wellhead and tubing hanger |
| 02/19/1980 | CA1072005A1 Method for oil recovery using a horizontal well with indirect heating |
| 02/19/1980 | CA1071895A1 Apparatus for converting oscillatory motion to reciprocating motion |
| 02/12/1980 | US4188068 Apparatus for mixing gas and liquid at a downhole location |
| 02/12/1980 | US4188050 Remote-controlled flowline connector |
| 02/12/1980 | US4187912 Method and apparatus for pumping fluids from bore holes |
| 02/12/1980 | US4187910 CO2 removal from hydrocarbon gas in water bearing underground reservoir |
| 02/12/1980 | US4187909 Method and apparatus for placing buoyant ball sealers |
| 02/12/1980 | US4187908 Radioactive isotopes of potassium, thorium and uranium |
| 02/12/1980 | US4187907 Waterflood method using surfactants |
| 02/12/1980 | CA1071532A1 Downhole heat exchanger for in-situ minefields |
| 02/12/1980 | CA1071531A1 Method of fracturing a subterranean formation |
| 02/05/1980 | US4187185 Oil recovery process using oxyalkylated additives |
| 02/05/1980 | US4187087 Handling fluid discharged from a conduit at a high velocity |
| 02/05/1980 | US4187038 Equipment for extracting oil or gas from under the sea bed and method of installing such equipment |
| 02/05/1980 | US4186802 Fracturing, propping agent, hydraulics |
| 02/05/1980 | US4186801 In situ combustion process for the recovery of liquid carbonaceous fuels from subterranean formations |
| 02/05/1980 | US4186800 Process for recovering hydrocarbons |
| 02/05/1980 | CA1071098A1 Cleanout procedure for well with low bottom hole pressure |
| 02/05/1980 | CA1071096A1 Method of recovering petroleum and bitumen from subterranean reservoirs |
| 02/05/1980 | CA1071095A1 Hydrocarbon recovery from earth strata |
| 02/05/1980 | CA1070966A1 Subsea station |
| 01/29/1980 | US4185872 In-situ leaching of uranium |
| 01/29/1980 | US4185871 In-situ retorting system |
| 01/29/1980 | US4185705 Well perforating tool |
| 01/29/1980 | US4185702 Method and apparatus for borehole perforating |
| 01/29/1980 | US4185693 Oil shale retorting from a high porosity cavern |
| 01/29/1980 | US4185692 Underground linkage of wells for production of coal in situ |
| 01/29/1980 | CA1070611A1 Recovery of hydrocarbons by in situ thermal extraction |
| 01/22/1980 | US4184953 Polyester fabric filter for sea water for injection into oil reservoir |
| 01/22/1980 | US4184549 High conformance oil recovery process |
| 01/22/1980 | US4184548 Method for determining the position and inclination of a flame front during in situ combustion of an oil shale retort |
| 01/22/1980 | CA1070100A1 Method and liquid for treating the surface of particles of a subsurface formation |
| 01/15/1980 | US4183813 For increasing amount of proppant in formation fracturing foam |
| 01/15/1980 | US4183722 Downhole jet pumps |
| 01/15/1980 | US4183562 Marine riser conduit section coupling means |
| 01/15/1980 | US4183555 Methods and joints for connecting tubular members |
| 01/15/1980 | US4183408 Gas production from source rock |
| 01/15/1980 | US4183407 Exhaust system and process for removing underground contaminant vapors |
| 01/15/1980 | US4183405 Enhanced recoveries of petroleum and hydrogen from underground reservoirs |
| 01/15/1980 | US4183404 Plural parallel tubing with safety joints or release from suspended receptacle |
| 01/09/1980 | EP0006830A1 Plastic well screen and its connection system |
| 01/09/1980 | EP0006656A1 Device for winning minerals via a borehole |
| 01/08/1980 | US4182584 Marine production riser system and method of installing same |
| 01/08/1980 | US4182418 Method for perforating water well pipe casings |
| 01/08/1980 | US4182417 Method for controlling permeability of subterranean formations |
| 01/08/1980 | US4182416 Induced oil recovery process |
| 01/08/1980 | US4182414 Water screen |
| 01/01/1980 | US4181362 Liquid seal for production level bulkhead for in situ oil shale retort |
| 01/01/1980 | US4181361 Gas collection system for oil shale retort |
| 01/01/1980 | US4181331 Hanger apparatus for suspending pipes |
| 01/01/1980 | US4181177 Controlling shale oil pour point |
| 01/01/1980 | US4181176 Oil recovery prediction technique |
| 01/01/1980 | CA1069043A Oil recovery process using a tapered surfactant concentration slug |
| 01/01/1980 | CA1069042A Subterranean drilling and slurry mining |
| 01/01/1980 | CA1068983A Hydraulic pumping unit with a variable speed triplex pump |
| 12/25/1979 | US4180463 Self-cleaning helical spring filter and methods |
| 12/25/1979 | US4179991 Perforating gun barrel |
| 12/25/1979 | CA1068599A Subterranean drilling and slurry mining |
| 12/18/1979 | US4178993 Method of starting gas production by injecting nitrogen-generating liquid |
| 12/18/1979 | CA1068214A1 In-situ mining of copper and nickel |
| 12/12/1979 | EP0005874A1 Method for increasing the productivity of a well penetrating an underground formation |
| 12/11/1979 | US4178039 Water treatment and heating in spent shale oil retort |
| 12/11/1979 | US4177752 High vertical conformance steam drive oil recovery method |
| 12/11/1979 | CA1067927A1 Apparatus, methods and joints for connecting tubular members |
| 12/11/1979 | CA1067820A1 Combination subsurface safety valve and chemical injector valve |
| 12/11/1979 | CA1067819A1 Mining and extracting process and apparatus |
| 12/11/1979 | CA1067818A1 Shaped charge well perforating apparatus |
| 12/11/1979 | CA1067686A1 Self-breaking viscous aqueous solutions and the use thereof |
| 12/04/1979 | CA1067399A1 Well flow control system and method |
| 12/04/1979 | CA1067398A1 High vertical conformance steam injection petroleum recovery method |
| 12/04/1979 | CA1067397A1 Method and means for lining deep shafts |
| 11/28/1979 | EP0005571A1 Method for forming channels of high fluid conductivity in formation parts around a borehole |
| 11/27/1979 | US4176064 Mixture concentrator |
| 11/27/1979 | US4175890 Joints for anchoring structures to the sea bed |
| 11/27/1979 | US4175789 Solution mining utilizing dissolved oxygen with elimination of entrained gas |
| 11/27/1979 | US4175778 Releasing tool |
| 11/27/1979 | US4175620 Methods and apparatus for anchoring offshore pipeline |
| 11/27/1979 | US4175618 High vertical and horizontal conformance thermal oil recovery process |
| 11/20/1979 | US4174926 Windmill pump drive system |
| 11/20/1979 | US4174753 Well stimulation by two-phase flow |
| 11/20/1979 | US4174752 Secondary recovery method and system for oil wells using solar energy |
| 11/20/1979 | US4174751 By heating |
| 11/20/1979 | CA1066613A1 Method for reducing power loss associated with electrical heating of a subterranean formation |