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)
11/1994
11/30/1994	EP0626348A1 Method of decontaminating earth and/or natural gas processing equipment
11/30/1994	CN2184082Y Gas injecting valve for oil field
11/29/1994	US5369579 Electronic blast control system for downhole well operations
11/29/1994	US5368412 Leakproof waste treatment ponds containing brines, applying gels such as polyacrylamide
11/29/1994	US5368102 Consolidatable particulate material and well treatment method
11/29/1994	US5368101 Using brines for displacement of hydrocarbons
11/29/1994	CA1333280C Production system for subsea oil wells
11/24/1994	DE4316973A1 Well pipe with partition walls
11/23/1994	CN2183447Y Intensive-type distributing device
11/23/1994	CN2183446Y Liquid-seeping tube with filtering layer
11/23/1994	CN2183445Y Filter for well
11/23/1994	CN2183444Y Electromagnetic heating device for deep-well petroleum
11/22/1994	US5366030 Hydraulic device for forming a cavity in a borehole
11/22/1994	US5366015 Method of cutting high strength materials with water soluble abrasives
11/22/1994	US5366014 Method and apparatus for perforating a well using a modular perforating gun system
11/22/1994	US5366013 Shock absorber for use in a wellbore including a frangible breakup element preventing shock absorption before shattering allowing shock absorption after shattering
11/22/1994	US5366012 Method of completing an uncased section of a borehole
11/22/1994	US5366011 Method for producing high water-cut gas with in situ water-disposal
11/22/1994	US5366009 Gravel pack well completions with auger-liner
11/22/1994	CA2018952C Treatment for reducing water coning in an oil reservoir
11/17/1994	EP0624712A1 Submarine wellhead anchor
11/17/1994	EP0624710A1 A foamable oil well-treatment-fluid
11/16/1994	CN2182878Y Fine filtering device for cleaning water filled well
11/16/1994	CN2182877Y Oscillator for perforator
11/15/1994	US5365435 System and method for quantitative determination of mixing efficiency at oil or gas well
11/15/1994	US5363922 Device and method for installing a submerged water pump in an artesian well
11/15/1994	US5363919 Simultaneous hydraulic fracturing using fluids with different densities
11/15/1994	US5363917 Method of sand consolidation
11/15/1994	US5363916 Using gel of polymer of hydroxyalkyl cellulose prepared by a redox reaction with vinyl phosphonic acid
11/10/1994	WO1994025732A1 A method of determining the production rate of each of the phases in a well stream
11/10/1994	WO1994025731A1 Acidising underground reservoirs
11/10/1994	WO1994025730A1 Stimulation of coalbed methane production
11/10/1994	WO1994025729A1 Downhole gas-liquid separator for wells
11/10/1994	WO1994025728A1 Method for placement of a scale inhibitor in a formation
11/10/1994	WO1994025655A1 Preform or matrix tubular structure for well casing
11/10/1994	DE4315118A1 Apparatus for aerating bioactive barrier layers in contaminated soils
11/10/1994	CA2162024A1 Stimulation of coalbed methane production
11/09/1994	CN1094784A Numerically controlled high-pressure steam generator at well top
11/09/1994	CN1094783A Technique for installation of well drilling equipment
11/08/1994	US5362713 Forming by dispersing water-insoluble reticulated bacterial cellulose in aqueous transport medium to make mud having plastic viscosity of at least 5 cp; adding drill solids, bentonite and/or soda ash
11/08/1994	US5362318 Consolidation agent and method
11/08/1994	US5361856 Well jetting apparatus and met of modifying a well therewith
11/08/1994	US5361845 Process for increasing near-wellbore permeability of porous formations
11/08/1994	US5361843 Method for completing a well
11/08/1994	US5361837 Method for preventing annular fluid flow using tube waves
11/08/1994	US5361830 Fluid flow conduit vibrator and method
11/08/1994	CA2060160C Method of positioning tubing within a horizontal well
11/08/1994	CA2053446C Process and apparatus for groundwater extraction using a high vacuum process
11/08/1994	CA2012328C Corrosion inhibition method and apparatus for downhole electrical heating in mineral fluid wells
11/06/1994	CA2122695A1 Foamable oil well-treatment-fluid
11/06/1994	CA2095571A1 Method and apparatus for improved recovery of oil from porous, subsurface deposits (tarhevcor process)
11/03/1994	DE4421026A1 Process for removing light liquid phases
11/02/1994	EP0622523A2 Well screen having a slurry flow path
11/02/1994	EP0622131A1 Improved process and apparatus for high vacuum groundwater extraction
11/01/1994	US5360069 Failsafe liner installation assembly and method
11/01/1994	US5360068 Creating fracture in reservoir, initiating combustion to burn formation and harden diatomite thus increasing permeability, shattering to create in situ proppants
11/01/1994	US5360067 Process for performing soil remediation
11/01/1994	US5360066 Method for controlling sand production of formations and for optimizing hydraulic fracturing through perforation orientation
11/01/1994	CA2093195C Methods and systems for recovering subsurface materials
11/01/1994	CA2049870C System for expelling volatile impurities from groundwater
11/01/1994	CA2042537C Gas lift valve
11/01/1994	CA1332785C Oil recovery
10/1994
10/27/1994	WO1994024414A1 Process and tool for laying underground collector mains for liquids and gases
10/26/1994	CN2180779Y Hot extracting device for thick oil well
10/26/1994	CN2180778Y Discharger for oil pipe
10/26/1994	CN2180777Y Channel pipe
10/26/1994	CN2180776Y Double-head multi-well oil pump
10/26/1994	CN1094118A Method and apparatus for producing oil by steam and acoustic wave combination
10/25/1994	US5358565 Steam injection profile control agent and process
10/25/1994	US5358564 In situ reaction product of alkali/ammonium and organoammonium silicate and polyalkylsilicate; used to close higher permeability zone to fluid flow
10/25/1994	US5358563 In-situ silica cementation for profile control during steam injection
10/25/1994	US5358357 Process and apparatus for high vacuum groundwater extraction
10/25/1994	US5358054 Method and apparatus for controlling steam breakthrough in a well
10/25/1994	US5358047 Injecting to stimulate subterranean formation; includes a proppant material; hardening
10/25/1994	US5358046 Oil recovery process utilizing a supercritical carbon dioxide emulsion
10/25/1994	US5358036 Safety disc brake assembly
10/25/1994	CA2025385C System for removing volatile impurities from ground water
10/25/1994	CA2025383C Arrangement to purify contaminated ground water
10/19/1994	CN2179909Y Pipe column sliding valve for underground multiple-zone construction
10/19/1994	CN2179908Y High-efficient sand and air-preventing device for obtaining oil from wells
10/18/1994	USRE34758 Travelling disc valve apparatus
10/18/1994	US5355957 Combined pressure testing and selective fired perforating systems
10/18/1994	US5355956 Plugged base pipe for sand control
10/18/1994	US5355949 Well liner with dual concentric half screens
10/18/1994	US5355948 Well liner
10/18/1994	US5355802 Method and apparatus for perforating and fracturing in a borehole
10/18/1994	CA2072565C Placing gravel pack in an oil well
10/18/1994	CA2030103C Technique for stimulating long intervals
10/18/1994	CA1332565C Method and device for toggle tie positioning and removing in a well base
10/18/1994	CA1332564C Production process and system from a central shaft and using a driving agent
10/18/1994	CA1332501C Method for inhibiting silica dissolution during oil well steam injection using acid and ammonia gas
10/13/1994	WO1994023179A1 Failsafe liner installation assembly and method
10/13/1994	WO1994023178A1 Foamed gels to reduce gas coning in matrix environments
10/13/1994	WO1994022554A1 Filter
10/12/1994	EP0619415A2 Control of particulate flowback in subterranean wells
10/12/1994	CN2179459Y Oil field recharged waste water pulse sterilizing unit
10/12/1994	CN1093435A Energy saving oil extraction equipment
10/12/1994	CN1093434A Oil extraction equipment using taking in and sending out crude oil
10/12/1994	CN1093433A Oil pumping well capable of separating oil from gas
10/11/1994	USRE34754 Fluid sampling apparatus

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