| 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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| 09/30/1980 | CA1086514A1 Scissor well template |
| 09/23/1980 | US4223949 Injection into brine well to dissolve sodium chloride while inhibiting dissolution of soluble calcium compounds |
| 09/23/1980 | US4223948 Process for the reduction of competitive oxidant consuming reactions in the solution mining of a mineral |
| 09/23/1980 | US4223920 Vertically retrievable subsea conduit connector |
| 09/23/1980 | US4223735 Scrubbing sulfur oxides from flue gas |
| 09/23/1980 | US4223734 Process of breaking and rendering permeable a subterranean rock mass |
| 09/23/1980 | US4223731 Method for enhanced recovery of petroleum |
| 09/23/1980 | US4223730 Method for the tertiary recovery of petroleum by flooding with hot water and an aqueous alkaline solution |
| 09/23/1980 | US4223729 Method for producing a geothermal reservoir in a hot dry rock formation for the recovery of geothermal energy |
| 09/23/1980 | US4223728 Method of oil recovery from underground reservoirs |
| 09/23/1980 | US4223726 Determining the locus of a processing zone in an oil shale retort by effluent water composition |
| 09/23/1980 | CA1086223A1 Split-ring riser latch |
| 09/23/1980 | CA1086222A1 Marine production riser system |
| 09/23/1980 | CA1086221A1 Process for recovering oil from a subterranean reservoir by means of injection of steam |
| 09/23/1980 | CA1086134A1 Subsurface pumping installation for handling viscous or sand-laden fluids |
| 09/16/1980 | US4222611 In-situ leach mining method using branched single well for input and output |
| 09/16/1980 | US4222440 Methods of small volume pumping especially suited for oil recovery from stripper wells |
| 09/16/1980 | US4222439 Enhanced recovery of petroleum |
| 09/16/1980 | US4222437 Drilling a row of supply wells, combustion |
| 09/16/1980 | CA1085721A1 Method and apparatus for completing diverless subsea flowline connections |
| 09/16/1980 | CA1085718A1 Oil recovery process utilizing air and superheated steam |
| 09/16/1980 | CA1085717A1 Method of producing and recovering gas from carbonaceous deposits |
| 09/16/1980 | CA1085716A1 Method of treating a well using fluoboric acid to clean a propped fracture |
| 09/09/1980 | US4221433 Retrogressively in-situ ore body chemical mining system and method |
| 09/09/1980 | CA1085289A1 Method for creating a permeable fragmented zone within a subterranean carbonaceous deposit for in situ coal |
| 09/02/1980 | US4220687 Powdered metal casing for perforating charge and its method of manufacture |
| 09/02/1980 | US4220212 Apparatus for monitoring the operation of well bore guns |
| 09/02/1980 | US4220205 Method of producing self-propping fluid-conductive fractures in rock |
| 09/02/1980 | US4220203 Method for recovering coal in situ |
| 09/02/1980 | US4220202 Apparatus for realization of rock exploitation method based on thermodynamic cycles utilizing in situ energy source |
| 09/02/1980 | US4220201 Casing perforator |
| 09/02/1980 | US4220034 Double action, self-contained swage |
| 08/26/1980 | US4219237 Method for maximizing shale oil recovery from an underground formation |
| 08/26/1980 | CA1084411A1 Apparatus and method of connecting a flowline to a subsea station |
| 08/20/1980 | EP0014659A1 Flexible device for sucking up large quantities of fluids, especially for pumping seawater from the depth |
| 08/20/1980 | EP0014267A1 Process for treating a well for starting hydrocarbon fluid production by injecting nitrogen-generating liquid |
| 08/19/1980 | US4218326 Enhanced oil recovery by flooding or blanketing |
| 08/19/1980 | US4218309 Removal of sulfur from shale oil |
| 08/19/1980 | US4217956 Method of in-situ recovery of viscous oils or bitumen utilizing a thermal recovery fluid and carbon dioxide |
| 08/19/1980 | US4217955 Oil recovery process |
| 08/19/1980 | CA1083954A1 In situ oil shale retort with a horizontal sill pillar |
| 08/19/1980 | CA1083839A1 Pivotal connecting device for pivotally connecting an off-shore articulated column structure to a sea bottom |
| 08/12/1980 | US4217146 Crude oil, titanium dioxide weighting agent |
| 08/12/1980 | US4216835 System for connecting an underwater platform to an underwater floor |
| 08/12/1980 | CA1083479A1 Apparatus and method of connecting a flexible line to a subsea station |
| 08/12/1980 | CA1083478A1 Abrasive resistant choke |
| 08/12/1980 | CA1083477A1 Low shear polymer injection system with ratio control between wells |
| 08/12/1980 | CA1083476A1 Surfactant oil recovery process |
| 08/12/1980 | CA1083366A1 High reliability connecting fittings and tubes for movable pipe ends |
| 08/05/1980 | US4216098 Alkoxylated vinyl sulfonic acid polymer |
| 08/05/1980 | US4215727 Plastic well pipe |
| 07/29/1980 | US4214842 Remotely controlled maneuverable tool means and method for positioning the end of a pipe string in offshore well operations |
| 07/29/1980 | US4214791 Pretreating with an acid gas |
| 07/29/1980 | US4214628 Multiple-purpose underground fluid injection system |
| 07/29/1980 | CA1082591A1 Method for recovering viscous hydrocarbons utilizing heated fluids |
| 07/29/1980 | CA1082590A1 Wellhead apparatus |
| 07/29/1980 | CA1082589A1 Method of consolidating a subterranean formation |
| 07/22/1980 | US4213476 Method and system for producing and transporting natural gas |
| 07/22/1980 | CA1082103A1 Progressive displacement of residual water past shut- in wells preparatory to tertiary |
| 07/22/1980 | CA1082102A1 Method of treating a high temperature formation to permit the use therein of temperature sensitive hydrophilic, viscosity increasing polymers |
| 07/22/1980 | CA1082100A1 Method and apparatus for completing a slanted wellbore |
| 07/22/1980 | CA1082099A1 Well perforating method for solution well mining |
| 07/15/1980 | US4212562 Method and apparatus for leveling templates for offshore subterranean wells |
| 07/15/1980 | US4212561 Marine structure connecting structures at different levels |
| 07/15/1980 | US4212354 Method for injecting carbon dioxide into a well |
| 07/15/1980 | US4212353 Hydraulic mining technique for recovering bitumen from tar sand deposit |
| 07/15/1980 | CA1081610A1 Reentry system for a subsea well apparatus |
| 07/15/1980 | CA1081608A1 Selective wellbore isolation using buoyant ball sealers |
| 07/15/1980 | CA1081606A1 Process for determining the location and/or extent of rock cavities, especially of artificially generated rock cracks |
| 07/15/1980 | CA1081442A1 Waterflood oil recovery process employing divalent ion tolerant surfactant systems |
| 07/09/1980 | EP0012759A1 Stabilized petroleum sulfonate products and their use in subterranean oil recovery. |
| 07/08/1980 | US4211613 Geothermal mineral extraction system |
| 07/08/1980 | US4211281 Articulated plural well deep water production system |
| 07/08/1980 | US4211279 Plunger lift system |
| 07/08/1980 | CA1081117A1 Laterally engageable flowline connector device |
| 07/08/1980 | CA1080955A1 Flooding polyvalent ion-containing oil reservoirs with micellar dispersions |
| 07/01/1980 | US4210868 Method for detecting an underground flame front using resistance probes |
| 07/01/1980 | US4210867 Induction coil method for detecting underground flame fronts |
| 07/01/1980 | US4210366 Method of detonating explosives for fragmenting oil shale formation toward a vertical free face |
| 07/01/1980 | US4210205 Injection of acid solution of vinylpyrrolidone terpolymer to facilitate flow of oil |
| 07/01/1980 | US4209891 Apparatus and method for positioning one part relative to another part |
| 07/01/1980 | CA1080614A2 High vertical conformance steam injection petroleum recovery method |
| 07/01/1980 | CA1080613A1 Well treatment fluid diversion with low density ball sealers |
| 06/24/1980 | US4209278 Chassis having articulated frame |
| 06/24/1980 | US4209270 Pipe connector apparatus and method |
| 06/24/1980 | US4209065 Thermal-operated valve for control of coolant rate of flow in oil wells |
| 06/24/1980 | US4208966 Methods and apparatus for selectively operating multi-charge well bore guns |
| 06/24/1980 | CA1080121A1 Water removal system for gas wells |
| 06/24/1980 | CA1079947A1 Waterflood oil recovery process employing biopolymers of enhanced viscosity yield |
| 06/24/1980 | CA1079946A1 Process for temporarily plugging a permeable subterranean earth formation |
| 06/17/1980 | US4208665 Dynamometer for monitoring sucker rod strings |
| 06/17/1980 | US4208196 Means for control of fluid distribution in low temperature separator |
| 06/17/1980 | US4208055 Method and device for sealing the place of penetration of a pipeline in the wall of a submerged structure |
| 06/17/1980 | US4207945 Injecting a vapor mixture of steam and a petroleum fraction containing carboxylic acids and phenols |
| 06/17/1980 | CA1079526A1 Organic amine process for sulfur removal from circulating oil used in sour gas wells |
| 06/17/1980 | CA1079508A1 Process for increasing the yield of petroleum with the flooding of the petroleum deposits by using non-ionic, boundary surface-active substances |
| 06/10/1980 | US4206809 Slug design in micellar-polymer flooding |
| 06/10/1980 | CA1079186A1 Method of assisting the recovery of oil using steam |
| 06/10/1980 | CA1079185A1 Method of improving a steam drive |
| 06/10/1980 | CA1079184A1 Fluid resonator |