| 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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| 04/20/1982 | US4325404 Valve claw to be situated at the end of a pipe to mount a closing valve |
| 04/20/1982 | CA1122117A1 Connection of underwater lines |
| 04/20/1982 | CA1122116A1 Method for enhanced oil recovery |
| 04/20/1982 | CA1122115A1 In situ oil extraction from underground formations using hot solvent vapor injections |
| 04/20/1982 | CA1122114A1 Method of producing self-propping fluid-conductive fractures in rock |
| 04/20/1982 | CA1122113A1 Fracture preheat oil recovery process |
| 04/15/1982 | WO1982001214A1 Thermal enhancement |
| 04/13/1982 | US4324505 Subsea blowout containment method and apparatus |
| 04/13/1982 | US4324292 Combustion, refluxing |
| 04/13/1982 | US4324291 Viscous oil recovery method |
| 04/07/1982 | EP0049012A1 Treatment of pseudoplastic polysaccharide solutions |
| 04/06/1982 | US4323463 Secondary recovery process |
| 04/06/1982 | US4323124 Coating with lecithin |
| 04/06/1982 | US4323122 Process for recovering organic liquids from underground areas |
| 04/06/1982 | US4323121 By injection of gases |
| 04/06/1982 | US4323120 By injection of gases |
| 04/06/1982 | US4323119 Vibratory apparatus for mining shale oil or the like |
| 04/06/1982 | US4323118 Apparatus for controlling and preventing oil blowouts |
| 04/06/1982 | CA1121281A1 Means for control of fluid distribution in low temperature separator |
| 04/06/1982 | CA1121264A1 Method for optimal placement and orientation of wells for solution mining |
| 04/06/1982 | CA1121262A1 Method for explosive expansion toward horizontal free faces for forming an in situ oil shale retort |
| 04/01/1982 | WO1982001007A1 Stimulation and cleanup of oil-and/or gas-producing wells |
| 03/30/1982 | US4322603 Electrode steam generator system for secondary oil recovery |
| 03/30/1982 | US4321966 High vertical conformance steam drive oil recovery method |
| 03/24/1982 | EP0047878A2 Process and apparatus for measuring foundation injection pressure |
| 03/23/1982 | US4320994 Preparation of grout for stabilization of abandoned in-situ oil shale retorts |
| 03/23/1982 | US4320923 Leaching with ammonium carbonate |
| 03/23/1982 | US4320802 Use of land-fill gas to stimulate crude oil production and to recover methane-rich gas |
| 03/23/1982 | US4320801 In situ processing of organic ore bodies |
| 03/23/1982 | US4320627 Apparatus for recovering natural gas in a mine |
| 03/16/1982 | US4319895 By reducing the amount of noncondensable gases comprising hydrogen sulfide and carbon dioxide |
| 03/16/1982 | US4319784 Apparatus for water jet and impact drilling and mining |
| 03/16/1982 | US4319635 Method for enhanced oil recovery by geopressured waterflood |
| 03/16/1982 | US4319632 Oil recovery well paraffin elimination means |
| 03/16/1982 | US4319526 Explosive safe-arming system for perforating guns |
| 03/16/1982 | US4319393 Methods of forming swages for joining two small tubes |
| 03/16/1982 | CA1120135A1 Beam pumping unit speed control |
| 03/16/1982 | CA1119794A1 Method and installation for flooding petroleum wells and oil-sands |
| 03/09/1982 | US4318442 Method and apparatus for controlling an underwater well blowout |
| 03/09/1982 | CA1119511A1 Oil recovery using a dimethylamide in a fluid carrier |
| 03/09/1982 | CA1119356A1 Method for removing elemental sulfur from high temperature, high pressure wells and flow lines |
| 03/02/1982 | US4317735 Method of inhibiting crosslinking of aqueous xanthan gums in the presence of ferric acid ions |
| 03/02/1982 | US4317488 Apparatus for use in placing a submarine structure on the sea bed alongside an underwater well and method of drilling a plurality of closely spaced underwater wells |
| 03/02/1982 | CA1119092A1 Process for recovering hydrocarbon fluids from a subsurface formation |
| 03/02/1982 | CA1119091A1 Solution mining method utilizing subsurface aquifer |
| 02/23/1982 | US4317174 Riser angle positioning system and process |
| 02/23/1982 | US4317023 Method of making slotted well screen |
| 02/23/1982 | US4316806 Method and demulsifier composition |
| 02/23/1982 | US4316702 Oil well control circuit |
| 02/23/1982 | US4316583 Demolition agent for brittle materials |
| 02/23/1982 | CA1118911A1 Method for ascertaining optimum location for well stimulation and/or perforation |
| 02/17/1982 | EP0046114A1 Perforation apparatus for boreholes |
| 02/16/1982 | US4315656 Method for reducing porosity of rubblized oil shale |
| 02/16/1982 | CA1118342A1 Method and apparatus for hydraulically controlling subsea equipment |
| 02/16/1982 | CA1118341A1 Indirect thermal stimulation of producing wells |
| 02/16/1982 | CA1118340A1 Simultaneous microemulsion-aqueous phase flooding process |
| 02/16/1982 | CA1118338A1 Submersible pumping system |
| 02/16/1982 | CA1118329A1 Method of locating extrema in multicomponent three phase systems |
| 02/16/1982 | CA1118200A1 Apparatus and method for positioning one part relative to another part |
| 02/10/1982 | EP0045420A1 In situ coal gasification |
| 02/09/1982 | US4314779 Precipitating calcium carbonate |
| 02/09/1982 | US4314614 Method and apparatus for disarming and arming explosive oil well perforators |
| 02/09/1982 | US4314608 Method and apparatus for well treating |
| 02/09/1982 | CA1117987A1 Sintered high density spherical ceramic pellets for gas and oil well proppants and their process of manufacture |
| 02/09/1982 | CA1117973A1 Sulfonation of crude oils with gaseous so.sub.3 to produce petroleum sulfonates |
| 02/09/1982 | CA1117864A1 Fast plugging device for leaks in pressurized oilwells |
| 02/09/1982 | CA1117863A1 Recovery of petroleum from viscous petroleum-containing formations including tar sands |
| 02/09/1982 | CA1117862A1 Uranium extraction from underground deposits |
| 02/02/1982 | US4314129 Method and apparatus for making well screen |
| 02/02/1982 | US4313694 Submersible pipe installation systems |
| 02/02/1982 | US4313499 Subterranean gasification of bituminous coal |
| 02/02/1982 | CA1117412A1 Well casing hanger assembly |
| 02/02/1982 | CA1117411A1 Oil recovery prediction technique |
| 02/02/1982 | CA1117410A1 Biopolymer filterability improvement by caustic-enzyme treatment |
| 01/27/1982 | EP0044706A2 Method and apparatus for forming and using a bore hole |
| 01/27/1982 | EP0044508A2 High-molecular weight water-soluble polymers, their preparation and their use |
| 01/26/1982 | US4312840 Process for the in-situ leaching of uranium |
| 01/26/1982 | US4312273 Shaped charge mounting system |
| 01/26/1982 | CA1117004A1 Petroleum production method |
| 01/26/1982 | CA1117003A1 Process for in-situ leaching of uranium |
| 01/19/1982 | US4311395 Pivoting skid blender trailer |
| 01/19/1982 | US4311341 Restoration of uranium solution mining deposits |
| 01/19/1982 | US4311340 Uranium leeching process and insitu mining |
| 01/19/1982 | US4311194 Liner hanger and running and setting tool |
| 01/19/1982 | CA1116510A1 High vertical conformance steam drive oil recovery method |
| 01/12/1982 | US4310372 Method of making a well screen |
| 01/12/1982 | US4310335 Method and apparatus for conveying through a pipe a diphasic fluid of high free gas content |
| 01/12/1982 | US4310058 Well drilling method |
| 01/12/1982 | US4310052 Offshore structure for production of hydrocarbons |
| 01/12/1982 | US4310050 Well drilling apparatus |
| 01/12/1982 | US4310049 Bubbling chlorine in the presence of water |
| 01/12/1982 | US4309891 Double action, self-contained swages for joining two small tubes |
| 01/12/1982 | CA1116075A1 Method of servicing wellbores |
| 01/12/1982 | CA1116073A1 Methods and apparatus for severing conduits |
| 01/12/1982 | CA1115941A1 Well completion and workover fluid having low fluid loss |
| 01/07/1982 | WO1982000044A1 Mobility control agent |
| 01/05/1982 | US4309127 Apparatus for controlling submarine oil leakage |
| 01/05/1982 | US4308917 Buoyant tubulars and method for installing same in a well bore |
| 12/30/1981 | EP0042398A1 A method for laying a flexible pipeline and pipeline to carry out this method |
| 12/30/1981 | EP0042392A1 Method and apparatus for collecting oil and gas from an underwater blow-out |