| 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) |
|---|
| 10/26/1976 | US3987851 Serially burning and pyrolyzing to produce shale oil from a subterranean oil shale |
| 10/26/1976 | US3987850 Well completion method for controlling sand production |
| 10/26/1976 | US3987848 Pressure-balanced well service valve |
| 10/26/1976 | US3987846 Wellhead shut-off valve |
| 10/26/1976 | US3987638 Subsea structure and method for installing the structure and recovering the structure from the sea floor |
| 10/19/1976 | US3986558 Petroleum extraction method and assembly |
| 10/19/1976 | US3986557 Production of bitumen from tar sands |
| 10/19/1976 | US3986556 Hydrocarbon recovery from earth strata |
| 10/19/1976 | US3986552 Pumping system for high viscosity oil |
| 10/05/1976 | US3983941 Well completion technique for sand control |
| 10/05/1976 | US3983939 Method for recovering viscous petroleum |
| 10/05/1976 | US3983937 Method of connection of an undersea well to a flexible outflow pipe |
| 09/28/1976 | USRE28978 Fail-safe subsea fluid transportation system |
| 09/28/1976 | US3982589 Cleaning and pumping apparatus for oil well production |
| 09/21/1976 | US3981626 Down hole pump and method of deep well pumping |
| 09/21/1976 | US3981624 Sonic or energy wave generator and modulator |
| 09/21/1976 | US3981362 Fracturing |
| 09/21/1976 | US3981359 Centralizer element for well screen |
| 09/21/1976 | US3981189 Methods and steam samplers with inertial latch |
| 09/21/1976 | US3981154 System for recovering petroleum fluids from underwater fissures |
| 09/14/1976 | USRE28963 Determination of residual oil in a formation |
| 09/14/1976 | US3980339 Process for recovery of carbonaceous materials from subterranean deposits |
| 09/14/1976 | US3980138 Underground fluid recovery device |
| 09/14/1976 | US3980137 Combustible fuel and oxygen |
| 09/14/1976 | US3980136 Fracturing well formations using foam |
| 09/07/1976 | US3978926 Tar sand in hydrocarbon solvent |
| 09/07/1976 | US3978925 Method for recovery of bitumens from tar sands |
| 09/07/1976 | US3978923 Injection sub for dual tube drilling |
| 09/07/1976 | US3978921 Apparatus for cryothermal fracturing of rock formations |
| 09/07/1976 | US3978920 In situ combustion process for multi-stratum reservoirs |
| 08/31/1976 | US3977478 Method for laser drilling subterranean earth formations |
| 08/31/1976 | US3977473 Well tubing anchor with automatic delay and method of installation in a well |
| 08/31/1976 | US3977472 Method of fracturing subterranean formations using oil-in-water emulsions |
| 08/31/1976 | US3977469 Conservation of water for core flow |
| 08/24/1976 | US3976582 Optimizing petroleum recovery micellar systems utilizing zeta potential |
| 08/24/1976 | US3976139 Anchoring for tensioning casing in thermal wells |
| 08/24/1976 | US3976138 Method of increasing permeability in subsurface earth formation |
| 08/24/1976 | US3976137 Recovery of oil by a combination of low temperature oxidation and hot water or steam injection |
| 08/24/1976 | US3976135 Method of forming a highly permeable solid mass in a subterranean formation |
| 08/17/1976 | US3974878 Method and apparatus for artificial lift from multiple production zones |
| 08/17/1976 | US3974877 Sand control method employing low temperature oxidation |
| 08/17/1976 | US3974876 Downhole fluid flow regulator |
| 08/10/1976 | US3974077 Fracturing subterranean formation |
| 08/10/1976 | US3973630 Wash-out tool and method of use thereof |
| 08/10/1976 | US3973629 Injection profiles with radiation induced copolymers |
| 08/10/1976 | US3973628 In situ solution mining of coal |
| 08/10/1976 | US3973627 Wellbore gravel pack method |
| 08/10/1976 | US3973625 Underwater connection apparatus |
| 08/10/1976 | US3973311 Method of forming high load self-cleaning helical spring filters |
| 08/03/1976 | US3972648 Well controller and monitor |
| 08/03/1976 | US3972372 Exraction of hydrocarbons in situ from underground hydrocarbon deposits |
| 08/03/1976 | US3972352 Discharge element for a liquid-gas separator unit |
| 07/27/1976 | US3971719 Three-phase separator |
| 07/27/1976 | US3971440 Method for treating subterranean formations with cellulose ether-polyacrylamide aqueous gels |
| 07/27/1976 | US3971439 Designing micellar displacement systems to minimize adsorption |
| 07/27/1976 | US3971437 Apparatus for dewatering boreholes |
| 07/27/1976 | US3971317 Detonation system and method |
| 07/20/1976 | US3970146 Sonic cleaning of wells |
| 07/20/1976 | US3970143 Oil well production system |
| 07/13/1976 | US3968847 Wellpoint jetting head |
| 07/13/1976 | US3968840 Controlled rate acidization process |
| 07/13/1976 | US3968839 Subsurface flow control apparatus |
| 07/13/1976 | US3968838 Underwater connection apparatus |
| 07/06/1976 | US3967853 Producing shale oil from a cavity-surrounded central well |
| 07/06/1976 | US3967682 Method of producing hydrocarbons from an unconsolidated formation |
| 07/06/1976 | US3967678 Stuffing box control system |
| 07/06/1976 | US3967675 Method and device for exploiting the geothermal energy in a submarine volcano |
| 07/06/1976 | US3967462 Method and apparatus for joining a subsea pipeline to an offshore platform riser |
| 06/29/1976 | US3966236 Releasable coupling |
| 06/29/1976 | US3965993 Well bore perforating apparatus |
| 06/29/1976 | US3965986 Method for oil recovery improvement |
| 06/29/1976 | US3965982 Hydraulic fracturing method for creating horizontal fractures |
| 06/29/1976 | US3965981 Pre-packed well points |
| 06/29/1976 | US3965736 Clamp-on transducer for well unit |
| 06/29/1976 | US3965685 Method for lowering ground water |
| 06/29/1976 | US3965658 Mowing machines |
| 06/22/1976 | US3964792 Explosive fluid transmitted shock method for mining deeply buried coal |
| 06/22/1976 | US3964553 Borehole tool orienting apparatus and systems |
| 06/22/1976 | US3964547 Recovery of heavy hydrocarbons from underground formations |
| 06/22/1976 | US3964546 Thermal recovery of viscous oil |
| 06/22/1976 | US3964545 Processes for secondarily recovering oil |
| 06/15/1976 | USRE28860 Curved offshore well conductors |
| 06/15/1976 | US3963076 Method and apparatus for gravel packing well bores |
| 06/15/1976 | US3963073 Purging apparatus |
| 06/08/1976 | US3961824 Method and system for winning minerals |
| 06/08/1976 | US3961490 Anchorage of floating structures |
| 06/01/1976 | US3960736 Self-breaking viscous aqueous solutions and the use thereof in fracturing subterranean formations |
| 06/01/1976 | US3960525 Oil-gas separator having defoaming structure |
| 06/01/1976 | US3960366 Reverse acting lock open crossover valve |
| 06/01/1976 | US3960214 Recovery of bitumen by steam injection |
| 06/01/1976 | US3960213 Production of bitumen by steam injection |
| 05/25/1976 | US3959647 Gamma-ray measuring method for determining an interface between media |
| 05/25/1976 | US3958636 Production of bitumen from a tar sand formation |
| 05/25/1976 | US3958634 Welded wire well screen on perforated casing |
| 05/18/1976 | US3957306 Explosive-aided oil shale cavity formation |
| 05/18/1976 | US3957116 Fluid flow control in waterflood |
| 05/18/1976 | US3957115 Method and apparatus for treating wells |
| 05/18/1976 | US3957112 Offshore apparatus for carrying out operations in an offshore well |
| 05/11/1976 | US3956145 Fluid for injection into a subterranean reservoir to displace hydrocarbons in the reservoir |
| 05/11/1976 | US3955998 Aqueous gels for plugging fractures in subterranean formation and production of said aqueous gels |