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)
11/1990
11/27/1990US4973201 Method for removing scale and radioactive material from earth
11/27/1990US4972907 Method of conducting well operations from a moveable floating platform
11/27/1990US4972906 Method for selective plugging of a zone in a well
11/27/1990US4972904 Geothermal well chemical injection system
11/27/1990US4972709 Pump control system, level sensor switch and switch housing
11/27/1990US4972704 Method for troubleshooting gas-lift wells
11/27/1990CA1276874C Subsurface device actuators
11/27/1990CA1276873C Formation fluid sampler
11/24/1990WO1990014498A1 Process and device for obtaining unadulterated samples of water when sinking a well by drilling
11/24/1990CA2033173A1 Process and device for obtaining unadulterated samples of water when sinking a well by drilling
11/22/1990EP0397875A1 Pipe roller-expanding device
11/22/1990EP0397874A1 Device for closing off a complication zone in a well
11/22/1990EP0397870A1 Method of casing the production seam in a well
11/22/1990CA2016991A1 Residue recovery system
11/21/1990CN2066073U Moving roof beam type beam-pumping unit for double-well
11/20/1990US4971522 Control system and method for AC motor driven cyclic load
11/20/1990US4971160 Perforating and testing apparatus including a microprocessor implemented control system responsive to an output from an inductive coupler or other input stimulus
11/20/1990US4971153 Method of performing wireline perforating and pressure measurement using a pressure measurement assembly disconnected from a perforator
11/20/1990US4971151 Recovery of oil from oil reservoirs
11/20/1990US4971150 Flooding with steam or carbon dioxide for oil wells
11/20/1990US4971099 Pressure balanced cartridge choke valve
11/20/1990CA1276544C Hydraulic tubing punch
11/20/1990CA1276483C Rheology test system
11/14/1990CN2065665U Increasing injection device for oil obtaining
11/14/1990CN2065664U Homogeneous distributor for wet vapour
11/13/1990US4969525 Firing head for a perforating gun assembly
11/13/1990US4969524 Well completion assembly
11/13/1990US4969523 Method for gravel packing a well
11/13/1990US4969521 Method of ameliorating two-phase flow segregation during wet steam injection in a vertical injection well
11/13/1990US4969520 Separation, softening; precipitation, flowing through wear ion exchange resin, steam generation
11/13/1990US4969518 Reciprocating rod type downhole pump
11/07/1990EP0396465A1 Ignition system for shaped charge perforating gun
11/07/1990EP0396204A2 Method and device for joining well tubulars
11/07/1990CN2065236U Roller type oil pump with prolonged service life of flexible piece
11/07/1990CN1046777A Removable press-fracturing bridge plug
11/07/1990CN1046776A Solid propping agent and making method thereof
11/06/1990US4968934 Magnetic marking apparatus for magnetically measuring displacement of a moveable element in a well
11/06/1990US4968332 Separator unit
11/06/1990US4967843 Device for producing an effluent contained in a submarine geological formation and production method employed using such a device
11/06/1990US4967840 Enhanced oil recovery
11/06/1990US4967837 Steam enhanced oil recovery method using dialkyl aromatic sulfonates
11/06/1990CA1275914C Producing asphaltic crude oil
11/05/1990CA2011951A1 Steam enhanced oil recovery processes and compositions for use therein
10/1990
10/30/1990US4967048 Safety switch for explosive well tools
10/30/1990US4966416 Fragmentation of an underground ore body
10/30/1990US4966236 Cementing method and arrangement
10/30/1990CA1275624C Well perforating apparatus and method
10/24/1990EP0394187A2 Method for the recovery of NLG
10/24/1990EP0394006A1 Slurry mixing apparatus
10/24/1990CN2064409U Smooth rod clamping device being able to lock
10/24/1990CN1010115B Gear type no playing beam oil extractor
10/23/1990US4964467 Non-aqueous viscosified carbon dioxide and method of use
10/23/1990US4964466 Hydraulic fracturing with chlorine dioxide cleanup
10/23/1990US4964464 Anti-sand bridge tool and method for dislodging sand bridges
10/23/1990US4964463 Controlling permeability of subterranean oil bearing formations
10/18/1990WO1990012305A1 Process and device for taking samples at a ground water measurement site
10/18/1990WO1990012196A2 Method and apparatus for monitoring well fluid parameters
10/18/1990WO1990011972A1 Sulfate scale dissolution
10/18/1990CA2014690A1 Slurry mixing apparatus
10/17/1990CA2014417A1 Enhanced oil recovery using flash-driven steamflooding
10/16/1990US4963597 Selective gel system for permeability profile control
10/16/1990US4962847 Liquid lift
10/16/1990US4962814 Optimization of cyclic steam in a reservoir with inactive bottom water
10/10/1990EP0391839A1 Start-up method for a process for deoxidizing water, particularly sea water
10/10/1990EP0391151A2 Microbial degradation of multiple halogenated aromatic compounds
10/10/1990CN2063576U Oil tube counterbalanced hydraulic pumping unit
10/09/1990US4961467 Enhanced oil recovery for oil reservoir underlain by water
10/09/1990US4961466 Method for effecting controlled break in polysaccharide gels
10/09/1990US4961365 For use in oil well boreholes
10/09/1990CA1275039A1 Marine riser base system
10/05/1990CA2013303A1 Method and apparatus for deoxidation of sea-water
10/04/1990WO1990012159A1 Method of decontaminating earth and/or natural gas processing equipment
10/04/1990CA2013726A1 Hydraulic impedance test method
10/04/1990CA2013725A1 Fracture investigation by resonance sweeping technique
10/03/1990EP0390281A1 Gellable buffered aqueous composition and its use in enhanced petroleum recovery
10/03/1990EP0390280A1 Method and composition for reducing the permeability of a high permeability zone in an oil reservoir
10/03/1990CN1045836A Fully hydraulic oil pump
10/03/1990CA2013450A1 Microbial degradation of polyhalogenated aromatic hydrocarbons
10/02/1990US4960576 Injecting ferric chelate which is reduced to ferrous chelate
10/02/1990US4960575 Using soluble polymeric catalyst
10/02/1990US4960171 Charge phasing arrangements in a perforating gun
10/02/1990CA1274785A1 Vapour tight environmental protection oil battery
10/02/1990CA1274768A1 Oil recovery by quenched in situ combustion
10/02/1990CA1274767A1 Method for treating subterranean formations
10/02/1990CA1274766A1 Measurement and intervention process and device in a well
09/1990
09/30/1990CA2013514A1 Steam enhanced oil recovery method using dialkyl aromatic sulfonates
09/26/1990CN1045627A Sucker rods of gear or rack form undergound extended-range device
09/25/1990US4958684 Steam injection profiling
09/25/1990US4958683 Method and apparatus for treating wells
09/25/1990CA1274468A1 Hasdrive with offset producers
09/25/1990CA1274418A1 Process and installation for circulating fluids by pumping
09/25/1990CA1274381A1 Method of improving conformance in steam floods with carboxylate steam foaming agents
09/21/1990CA2011180A1 Extraction system with a pump having an elastic rebound inner tube
09/19/1990EP0388265A1 Method and tool for gravel pack evaluation
09/19/1990EP0387851A1 Corrosion inhibition method and apparatus for downhole electrical heating in mineral fluid wells
09/19/1990EP0387846A1 Power sources for downhole electrical heating
09/19/1990CN2062379U Porous ceramic sand filter pipe for oil well
09/19/1990CN2062378U Gas-removing and sand-removing device
09/19/1990CN1009672B Process for increasing degree of oil extraction
09/19/1990CN1009656B Stabilization of xanthene gum in aqueous solution
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