Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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)
12/1981
12/29/1981USRE30836 Liquid-gas separator unit
12/29/1981CA1115386A1 Gas well controller system and apparatus
12/29/1981CA1115222A1 Use of fermented must for the recovery of crude oil
12/22/1981USRE30829 Casing perforation method and apparatus
12/22/1981US4306982 Method of increasing porosity and permeability of subsurface rock formations to increase efficiency of secondary hydrocarbon recovery operations
12/22/1981US4306628 Safety switch for well tools
12/22/1981US4306621 Method for in situ coal gasification operations
12/22/1981US4306428 Torque drive mechanism
12/22/1981CA1114738A1 Method of applying tensile stress to a casing
12/22/1981CA1114737A1 Polyurethane ball sealers for well treatment fluid diversion
12/15/1981US4305468 Method for drilling wellbores from an offshore platform
12/15/1981US4305466 Offshore platform having three decks
12/15/1981US4305465 Subsurface tubing hanger and stinger assembly
12/15/1981US4305464 Via borehole under triaxial compression
12/15/1981US4305463 Oil recovery method and apparatus
12/15/1981CA1114284A1 Determining the locus of a processing zone in an in situ oil shale retort
12/08/1981US4304677 Injecting a high-density aqueous solution of calcium bromide and zinc bromide; oil and gas wells; hydrostatics
12/08/1981US4304308 Burner apparatus for making holes in coal seams
12/08/1981US4304302 Method for injecting a two phase fluid into a subterranean reservoir
12/08/1981CA1113875A1 Xanthomonas biopolymer for use in displacement of oil from partially depleted reservoirs
12/01/1981US4303833 Natural energy operated pump system
12/01/1981US4303273 In situ oil shale retort with a generally T-shaped vertical cross section
12/01/1981US4303128 Injection well with high-pressure, high-temperature in situ down-hole steam formation
12/01/1981US4303127 Multistage clean-up of product gas from underground coal gasification
12/01/1981US4303126 Arrangement of wells for producing subsurface viscous petroleum
12/01/1981CA1113381A1 Automatic coupling of two non aligned conduit sections
12/01/1981CA1113380A1 Method for the recovery of power from lhv gas
12/01/1981CA1113379A1 Reduction of carbon monoxide in substoichiometric combustion
12/01/1981CA1113378A1 Secondary recovery method and system for oil wells using solar energy
12/01/1981CA1113377A1 Solution mining water soluble salts at high temperatures
12/01/1981CA1113376A1 Solution mining potassium chloride from heated subterranean cavities
11/1981
11/25/1981EP0040445A1 Fluid displacement with heteropolysaccharide solutions, and the microbial production of heteropolysaccharides
11/24/1981US4302429 Alkaline carbonate leaching using hydrogen peroxide as oxidant, alkylidene-1,1-diphosphonic acid stabilizer
11/24/1981US4302052 Modular hydraulic mining tool with slurry inlet metering
11/24/1981US4302051 Open surface flotation method
11/24/1981US4301875 Method for making holes and producing gas in coal seams
11/24/1981US4301868 Method using hydrocarbon foams as well stimulants
11/24/1981US4301867 Injecting caustic solution containing amphoteric metal ion to precipitate insoluble silicates
11/24/1981US4301866 Method and apparatus for igniting an in situ oil shale retort
11/24/1981US4301865 In situ radio frequency selective heating process and system
11/24/1981CA1113001A1 Method for underground gasification of fuel
11/24/1981CA1113000A1 In situ processing of oil shale
11/24/1981CA1112999A1 Method for recovering subsurface earth substances
11/18/1981EP0039824A1 A process for enhanced oil recovery by gas injection and apparatus for use therein
11/18/1981EP0039699A1 Method and column for collection and separation of oil, gas and water from blowing wells at the sea bed
11/17/1981US4300801 Method of solution mining salts from an underground salt deposit
11/17/1981US4300800 Method of rubbling a pillar
11/17/1981US4300634 Foamable compositions and formations treatment
11/17/1981CA1112562A1 Thermal-mine oil production method
11/17/1981CA1112561A1 Method of thermal-mine recovery of oil and fluent bitumens
11/17/1981CA1112557A1 Sampler and measurement apparatus
11/12/1981WO1981003143A1 Blender apparatus
11/11/1981EP0039597A2 Drilling a borehole from an offshore platform
11/11/1981EP0039596A2 Offshore drilling and production system
11/11/1981EP0039334A1 Device for collecting oil escaping accidentally from a under-water oil sheet
11/10/1981US4299295 Process for degasification of subterranean mineral deposits
11/10/1981US4299287 Bar actuated vent assembly and perforating gun
11/10/1981US4299286 Displacement
11/10/1981US4299285 Underground gasification of bituminous coal
11/10/1981US4299284 Pretreatment by injection of a diverter fluid containing a surfactant
11/10/1981US4299283 Strip structure for well screen
11/10/1981US4299282 Well cleaner
11/10/1981US4299281 Compensating bridge plug
11/10/1981CA1112157A1 Well tubing coupling system
11/10/1981CA1112156A1 Method for the automatic placing of a submarine manifold end, and means for implementing said method
11/10/1981CA1112155A1 High vertical conformance steam drive oil recovery method
11/10/1981CA1112154A1 Process for solvent extraction of oil from oil-containing diatomite ore
11/10/1981CA1112153A1 Method for increasing the productivity of a well penetrating an underground formation
11/04/1981EP0038831A1 Platform for oil recovery preparedness
11/03/1981US4298066 Process and device for injecting a liquid agent used for treating a geological formation in the vicinity of a well bore traversing this formation
10/1981
10/27/1981US4297469 Bipolymer of vinyl sulfonic acid-glycidol adduct and acrylamide
10/27/1981US4296970 Hydraulic mining tool apparatus
10/27/1981US4296969 Thermal recovery of viscous hydrocarbons using arrays of radially spaced horizontal wells
10/27/1981US4296968 In situ oil shale retort having horizontally offset pillars
10/27/1981US4296810 Method of producing oil from a formation fluid containing both oil and water
10/27/1981US4296809 Injection of air
10/27/1981US4296807 Crossover tool
10/27/1981CA1111542A1 Method for determining the degree of change of material properties of underground strata
10/27/1981CA1111345A1 Marine production riser system and method of installing same
10/27/1981CA1111342A1 Formation treatment with silicate activated lignosulfonate gel
10/27/1981CA1111237A1 Chrome lignosulfonates as additives in oil recovery process involving chemical recovery agents
10/21/1981EP0037996A1 Process for the manufacture of amine oxides, and their use as surface active agents
10/20/1981US4296203 Xanthomonas bipolymer for use in displacement of oil from partially depleted reservoirs
10/20/1981US4295918 Apparatus for assembling a plastic mining screen
10/20/1981US4295796 Gas lift apparatus
10/20/1981US4295795 Method for forming remotely actuated gas lift systems and balanced valve systems made thereby
10/20/1981US4295524 Isolation gravel packer
10/13/1981USRE30767 Method using lignosulfonates for high-temperature plugging
10/13/1981US4294573 Submersible electrically powered centrifugal and jet pump assembly
10/13/1981US4294563 Thermally insulated bulkhead for in situ oil shale retort
10/13/1981US4294471 Subsea flowline connector
10/06/1981US4293283 Jet with variable throat areas using a deflector
10/06/1981US4293035 Solvent convection technique for recovering viscous petroleum
10/06/1981US4292895 Explosive safe-arming apparatus for perforating guns
10/06/1981CA1110163A1 Fracing process
09/1981
09/29/1981US4292011 Turbo pump gas compressor
09/29/1981US4291920 Ion exchanging
09/29/1981US4291763 Dispenser for oil well treating chemicals
09/29/1981US4291623 Binary electroexplosive device and method of assembly thereof
09/22/1981US4290715 Pipeline riser for floating platforms
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