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)
08/1977
08/23/1977US4043596 Forming shale oil recovery retort by blasting into slot-shaped columner void
08/23/1977US4043595 In situ recovery of shale oil
08/23/1977US4043393 Extraction from underground coal deposits
08/23/1977US4043129 High temperature geothermal energy system
08/16/1977US4042034 Method for increasing the recovery of natural gas from a geo-pressured aquifer
08/16/1977US4042033 Combination subsurface safety valve and chemical injector valve
08/16/1977US4042029 Carbon-dioxide-assisted production from extensively fractured reservoirs
08/16/1977US4042027 Precipitation, in-situ combustion
08/16/1977US4042026 Method for initiating an in-situ recovery process by the introduction of oxygen
08/16/1977US4042025 Hydraulic control system underflow valve control method and apparatus
08/16/1977US4042023 Control line protector
08/16/1977US4041865 Method and apparatus for detonating explosives
08/16/1977US4041719 Method and apparatus for connecting submarine pipelines
08/09/1977US4040487 Method for increasing the recovery of natural gas from a geo-pressured aquifer
08/09/1977US4040483 Recovery of oil by circulating hot fluid through a gas-filled portion of a network interconnected fractures
08/09/1977US4040482 Optional fire and release tool and method
08/02/1977US4039208 Device for locking and unlocking two concentric pipes
08/02/1977US4039030 Oil and gas well stimulation
08/02/1977US4039025 Apparatus for anchoring an offshore structure
07/1977
07/26/1977US4037663 Method for well exploitation
07/26/1977US4037658 Method of recovering viscous petroleum from an underground formation
07/26/1977US4037657 Process for recovery of carbonaceous materials from subterranean deposits by in situ processing
07/26/1977US4037655 Method for secondary recovery of oil
07/19/1977US4036299 Enriching off gas from oil shale retort
07/19/1977US4036298 Method of connection of wells by in-situ combustion
07/19/1977US4036297 Subsurface flow control apparatus and method
07/19/1977US4036295 Method and apparatus for connecting flowlines to underwater installations
07/12/1977US4035103 Gas lift mandrel valve mechanism
07/12/1977US4035023 Apparatus and process for hydraulic mining
07/12/1977US4034812 Method for recovering viscous petroleum from unconsolidated mineral formations
07/12/1977US4034810 Oil recovery
07/05/1977US4033640 Seal bearing apparatus
07/05/1977US4033412 Fluid carrier recovery system and method
07/05/1977US4033411 Injection of solvent vapors and combustion-product gas
07/05/1977US4033410 Monoethanolamine process for sulfur removal from circulating oil used in sour gas wells
06/1977
06/28/1977US4032194 Method for the production of minerals
06/28/1977US4032193 Coal disaggregation by basic aqueous solution for slurry recovery
06/28/1977US4031960 Circulating valve
06/28/1977US4031959 Method of maintaining the permeability of hydrocarbon reservoir rock
06/28/1977US4031957 Method and apparatus for testing and treating well formations
06/28/1977US4031956 Method of recovering energy from subsurface petroleum reservoirs
06/28/1977US4031826 Detonation system and method
06/21/1977US4030549 Recovery of geothermal energy
06/21/1977US4030547 Apparatus for cryothermal fracturing of rock formations
06/21/1977US4030546 Swivel assembly
06/21/1977US4030545 Apparatus for cleansing well liner and adjacent formations
06/21/1977US4030310 Monopod drilling platform with directional drilling
06/14/1977US4029360 Method of recovering oil and water from in situ oil shale retort flue gas
06/14/1977US4029149 Propping subterranean formation fractures
06/14/1977US4029148 Well fracturing method
06/07/1977US4028009 Jet pump
06/07/1977US4027917 Method for igniting the top surface of oil shale in an in situ retort
06/07/1977US4027731 Methods of and apparatus for hydrocarbon recovery
05/1977
05/31/1977US4026661 Hydraulically operated sucker rod pumping system
05/31/1977US4026361 Treating wells with a temporarily thickening cellulose ether solution
05/31/1977US4026360 Hydrothermally forming a flow barrier in a leached subterranean oil shale formation
05/31/1977US4026359 Producing shale oil by flowing hot aqueous fluid along vertically varied paths within leached oil shale
05/31/1977US4026358 Method of in situ recovery of viscous oils and bitumens
05/31/1977US4026357 In situ gasification of solid hydrocarbon materials in a subterranean formation
05/31/1977US4026356 Method for in situ gasification of a subterranean coal bed
05/31/1977US4026355 Method for testing and monitoring for producing landfill gas
05/24/1977US4025235 System for improving oil well production
05/24/1977US4025115 Method of enhancing recovery of oil from pillars adjacent in situ oil shaft retort
05/24/1977US4024916 Borehole sealing method and apparatus
05/24/1977US4024915 Recovery of viscous oil by unheated air injection, followed by in situ combustion
05/24/1977US4024914 Method of processing coal channels in underground coal gasification
05/24/1977US4024724 Means and method for making a flowline connection to a subsea connector means
05/17/1977USRE29219 Surfactant oil recovery process
05/17/1977US4023619 Method of connecting of an undersea central station to a group of undersea wells and outflow pipes
05/17/1977US4023371 Riser for an offshore platform
05/10/1977US4022511 Recovery of liquid and gaseous products from an in situ oil shale retort
05/10/1977US4022280 Thermal recovery of hydrocarbons by washing an underground sand
05/10/1977US4022279 Formation conditioning process and system
05/10/1977US4022278 Recovery of oil by a vertical miscible flood
05/10/1977US4022277 In situ solvent fractionation of bitumens contained in tar sands
05/10/1977US4022276 Method of selecting oil recovery fluids using nuclear magnetic resonance measurements
05/10/1977US4022275 Methods of use of sonic wave generators and modulators within subsurface fluid containing strata or formations
05/03/1977US4020901 Arrangement for recovering viscous petroleum from thick tar sand
04/1977
04/26/1977US4019578 Hot water injection
04/26/1977US4019577 Thermal energy production by in situ combustion of coal
04/26/1977US4019576 Oil recovery from an oil-water well
04/26/1977US4019575 System for recovering viscous petroleum from thick tar sand
04/26/1977US4019334 Method and apparatus for making subsea pipe connections
04/26/1977US4019333 Apparatus and method for buffering submerged conduits
04/19/1977US4018481 Gasification of coal in situ
04/19/1977US4018293 Method and apparatus for controlled fracturing of subterranean formations
04/19/1977US4018284 Apparatus and method for gravel packing a well
04/19/1977US4018283 Method and apparatus for gravel packing wells
04/19/1977US4018282 Method and apparatus for gravel packing wells
04/19/1977US4018281 Oil recovery by waterflooding with improved mobility control
04/19/1977US4018280 Process for in situ retorting of oil shale
04/19/1977US4018279 In situ coal combustion heat recovery method
04/12/1977US4017226 Apparatus for lining a continuous concrete pipe
04/12/1977US4017120 Production of hot brines from liquid-dominated geothermal wells by gas-lifting
04/12/1977US4017119 Method for rubblizing an oil shale deposit for in situ retorting
04/12/1977US4016932 Surfactant oil recovery method for use in high temperature formations containing water having high salinity and hardness
04/12/1977US4016930 Oil well producing method and system
04/05/1977US4015664 Shale oil recovery process
04/05/1977US4015663 Method of subterranean steam generation by in situ combustion of coal
04/05/1977US4015660 Subsea oil and gas production manifold system
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