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