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)
11/1991
11/05/1991CA2041788A1 Deployment and recovery of pre-packed screens
11/05/1991CA1291780C Underwater oil production
11/05/1991CA1291704C Process for passing carbon dioxide through a cased, cemented and perforated well
11/03/1991CA2041584A1 Method for steam flooding profile control
10/1991
10/30/1991CN1055794A Heat extractor for petroleum
10/30/1991CN1014537B Drill stem test method and apparatus
10/29/1991US5060730 Injecting water wetting agent and natural gas
10/29/1991US5060726 Method and apparatus for producing tar sand deposits containing conductive layers having little or no vertical communication
10/29/1991CA1291419C Nitrogen stimulation of a potassium hydroxide wellbore treatment
10/23/1991EP0453354A2 Intra-perforating gun swivel
10/23/1991EP0453052A2 Well bore measurement tool
10/23/1991EP0453051A2 Well bore measurement tool
10/22/1991US5058681 Increased effectiveness of fluid transport; steam contains carbon dioxide and ammonia
10/22/1991US5058680 Method of detonating a perforating apparatus on a tubing including lowering one end of a pump and a firing head into said tubing
10/22/1991US5058677 Two-step method for horizontal gravel packing
10/22/1991US5058676 Method for setting well casing using a resin coated particulate
10/22/1991US5058675 Method and apparatus for the destructive distillation of kerogen in situ
10/22/1991US5058670 Oriented valve and latch for side pocket mandrel
10/22/1991US5058669 Extraction system with a pump having an elastic rebound inner tube
10/19/1991CA2038649A1 Catalytic downhole reactor and steam generator
10/16/1991EP0452126A2 Apparatus for orienting perforating gun
10/16/1991CN2086791U Rotary portal of pipe for oil-pumping well
10/16/1991CN1055408A Pitch increased type chain oil-pumping machine
10/16/1991CN1014339B New method of increasing productivity of crude oil-marfua method
10/16/1991CN1014338B Method for controlling rock dissolution and pipe corrosion during steam injection in on oil well
10/16/1991CN1014337B Method of assisted production of effluent to be produced contained in geological formation
10/16/1991CN1014336B In-situ steam drive oil recovery process
10/15/1991US5056599 Method for treatment of wells
10/15/1991US5056598 Method of protecting casing during high pressure well stimulation
10/15/1991US5056597 Injecting and mixing a surfactant; uniform distribution
10/15/1991US5056596 Recovery of bitumen or heavy oil in situ by injection of hot water of low quality steam plus caustic and carbon dioxide
10/15/1991US5056595 Wireline formation test tool with jet perforator for positively establishing fluidic communication with subsurface formation to be tested
10/09/1991EP0450056A1 Progressive cavity drive train
10/09/1991CN1014265B Undersea conveying apparatus of crude oil and natural gas
10/09/1991CN1014253B Method for improving permeability of oil-well strata and its solvent
10/09/1991CN1014252B Nitrogen stimulation of potassium hydroxide wellbore treatment
10/08/1991US5055185 Anti-freeze separator assembly
10/08/1991US5055180 Method and apparatus for recovering fractions from hydrocarbon materials, facilitating the removal and cleansing of hydrocarbon fluids, insulating storage vessels, and cleansing storage vessels and pipelines
10/08/1991US5055030 Method for the recovery of hydrocarbons
10/08/1991US5055002 Downhole pump with retrievable nozzle assembly
10/08/1991US5054961 Onsite soil treatment process
10/08/1991US5054564 Well perforating apparatus
10/08/1991US5054557 Device for extracting a liquid out of a tube of great length
10/08/1991US5054556 Method of and means for operating geothermal wells
10/08/1991US5054555 Tension-actuated mechanical detonating device useful for detonating downhole explosive
10/08/1991US5054554 Rate control method for hydraulic fracturing
10/08/1991US5054553 Method of underground-water exploration during well-construction by hydraulic-system drilling
10/08/1991US5054552 Breaker system for aqueous fluids containing xanthan gums
10/08/1991US5054551 In-situ heated annulus refining process
10/08/1991US5054510 Selective valve to pass fluids
10/03/1991WO1991015289A1 Branched ether surfactants and their use in an enhanced oil recovery process
10/03/1991CA2078110A1 Branched ether surfactants and their use in an enhanced oil recovery process
10/02/1991CN1055033A Drag analysis method
10/02/1991CN1014176B Apparatus for conveying liquid between bottom and surface of sea
10/01/1991US5053055 Whitener dispersion
10/01/1991US5052490 Permeability of fines-containing earthen formations by removing liquid water
10/01/1991US5052489 Apparatus for selectively actuating well tools
10/01/1991US5052488 Plug apparatus and method for cementing a liner in a well bore
10/01/1991US5052487 Sequential injection foam process for enhanced oil recovery
10/01/1991US5052486 Method and apparatus for rapid and continuous hydration of polymer-based fracturing fluids
10/01/1991US5052483 Sand control adapter
10/01/1991US5052482 Catalytic downhole reactor and steam generator
10/01/1991CA1289869C Well head with adjustable flow for the exploitation of biogas
10/01/1991CA1289868C Oil recovery
09/1991
09/25/1991EP0431085A4 Method of decontaminating earth and/or natural gas processing equipment
09/25/1991EP0418374A4 Sulfate scale dissolution
09/25/1991CN2085414U Injecting and emission device for gas emission and liquid injecting for coal bed
09/24/1991US5050682 Coupling apparatus for a tubing and wireline conveyed method and apparatus
09/24/1991US5050678 Gravel pack screen having retention means and fluid permeable particulate solids
09/24/1991US5050677 Well construction method
09/24/1991US5050676 Process for two phase vacuum extraction of soil contaminants
09/24/1991US5050675 Perforating and testing apparatus including a microprocessor implemented control system responsive to an output from an inductive coupler or other input stimulus
09/24/1991US5050674 Method for determining fracture closure pressure and fracture volume of a subsurface formation
09/24/1991US5050672 Pump apparatus including a firing head for use with a perforating gun on a tubing string
09/24/1991CA1289467C Tubing packer
09/24/1991CA1289466C Air chamber actuated dual tubing release assembly
09/24/1991CA1289465C Method of securing a tubular member within an annular well member, the combined well structure and the tool therefor
09/24/1991CA1289464C Perforate, test and sample tool and method of use
09/24/1991CA1289412C Fluid driven pumping apparatus
09/19/1991WO1991013608A1 Dentifrice inhibiting dental plaque
09/18/1991EP0446976A2 Gravel packer and service tool
09/18/1991EP0224474B1 Water soluble perforation pack
09/18/1991CN1013979B Bore screen
09/17/1991US5049297 Sulfate scale dissolution
09/17/1991US5049046 Pump control system for a downhole motor-pump assembly and method of using same
09/17/1991US5049037 Automatic well pump skimmer level control
09/17/1991US5048612 Double nut setting tool and linger hanger assembly
09/17/1991US5048610 Single bore packer with dual flow conversion for gas lift completion
09/17/1991US5048609 Controlled diffusion of gel breaker
09/17/1991US5048608 Consolidation of hydraulic fractures employing a polyurethane resin
09/17/1991US5048607 In-situ emulsion polymerization of ethylene derivatives
09/17/1991US5048606 Setting tool for a liner hanger assembly
09/17/1991US5048348 Fluid flow volumetric determination apparatus and method
09/17/1991CA1289162C Flowline adjustable joint
09/17/1991CA1289096C Process for the preparation of polysaccharide aqueous solutions
09/17/1991CA1289061C Pipe connector and method of applying same
09/17/1991CA1289058C Subsea riser for multiple bore wells
09/17/1991CA1289057C Method for achieving communication between injection and production wells in tar sand deposits
09/11/1991CN2084513U Integrated hollow oil pump rod
09/11/1991CN2084512U Butt joint pipe oil pump cylinder
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