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)
06/1998
06/10/1998EP0846839A2 Method and apparatus for placing and cementing casing in horizontal wells
06/10/1998CN2283727Y Pressure conduction priming device
06/10/1998CN2283726Y Pressure detonating supercharging device
06/10/1998CN2283725Y Metal silk floss wriggling filter sand pipe
06/10/1998CN1184526A Method for connecting underwater pipelines particularly suitable for great depths and big diameters
06/10/1998CN1184200A Oil well pore path crack cleaning equipment and treating method
06/10/1998CN1038703C Non-shell press-cracking bomb
06/09/1998US5762149 Method and apparatus for well bore construction
06/09/1998US5762137 Retrievable screen apparatus and methods of using same
06/04/1998WO1998023846A1 System, vessel, seabed installation and method for producing oil or gas
06/04/1998WO1998023845A1 Method and apparatus for connecting an underwater flexible riser to a structure on the surface
06/04/1998WO1998023844A1 Method and device for production of hydrocarbons
06/04/1998WO1998023842A1 Methods and apparatus for enhanced recovery of viscous deposits by thermal stimulation
06/04/1998DE19702983C1 Drilling head adapting efficiently to both soft and hard going
06/04/1998DE19648928A1 Process for decontaminating ground covered with toxic material using in situ treatment
06/04/1998CA2272923A1 Method and device for production of hydrocarbons
06/03/1998CN2283128Y Sound wave vibrating water filler
06/03/1998CN2283127Y Soft ring oil pipe type oil extraction device
06/03/1998CN1183507A Process for underground gasification of coal in two stage
06/02/1998US5759019 Filament fiber impregnated with a thermosetting resin
06/02/1998US5758727 Enhanced petroleum fluid recovery method in an underground reservoir
06/02/1998US5758725 Method and device for enhancing oil and gas flow in a well
05/1998
05/28/1998WO1998022760A1 A plant for exploiting geothermal energy
05/28/1998WO1998022692A1 Wireline/coiled tubing retrievable well pump
05/28/1998WO1998022690A1 Connector for an expandable tubing string
05/28/1998CA2271301A1 A plant for exploiting geothermal energy
05/28/1998CA2242583A1 Wireline/coiled tubing retrievable well pump
05/27/1998EP0844366A1 Reinforced elastomeric bag for use with electric submergible motor protectors
05/27/1998EP0717818B1 System for pumping liquids using a jet pump
05/27/1998CN1182824A Method for consolidation of sand
05/27/1998CN1182823A Oil production machine
05/26/1998US5755288 Downhole gas compressor
05/26/1998US5755286 Method of completing and hydraulic fracturing of a well
05/26/1998US5755285 Method for decontaminating soil containing harmful substances and boring head for carrying out the method
05/22/1998WO1998021447A1 Method for accelerating production - c-i-p ii
05/22/1998WO1998021444A2 Apparatus and method for expanding a liner patch; a stroke indicator; and a tubular patch
05/22/1998WO1998021152A1 Groundwater remediation with microporous diffusor
05/20/1998EP0842348A1 Inflatable tubular sleeve for tubing or obturating a well or a pipe
05/20/1998EP0842347A1 Device and process for the lining of a pipe branch, particularly in an oil well
05/20/1998EP0728253B1 Cellulose injection system and method
05/20/1998CN2282066Y Vertical double cavity mixing tank device
05/20/1998CN2282065Y Adjustable constant flow water injection mandrel
05/20/1998CN2282064Y Petroleum composite perforating shell
05/20/1998CN1182166A Efficient gas pressure-cracking method
05/20/1998CN1182165A Method and apparatus for establishing branch wells at node of parent well
05/19/1998US5753180 Anthrahydroquinone
05/19/1998US5752570 Method and device for production of hydrocarbons
05/14/1998WO1998020233A2 Fluid separation and reinjection systems for oil wells
05/14/1998WO1998020232A1 Groundwater recovery system
05/14/1998WO1998020231A1 Method of and device for production of hydrocarbons
05/14/1998CA2271168A1 Fluid separation and reinjection systems for oil wells
05/14/1998CA2208648A1 Well pump puller
05/13/1998EP0840855A1 Electric pump with a linear motor
05/13/1998EP0840836A1 System for controlling production from a gaz-lifted oil well
05/13/1998EP0840835A1 Improvements in deep well pumping apparatus
05/13/1998EP0840834A1 Apparatus and process for drilling and completing multiple wells
05/13/1998EP0840769A1 Non-toxic, inexpensive synthetic drilling fluid
05/13/1998CN2281421Y Underground three phase separator
05/13/1998CN2281420Y Dual self sealing separator
05/13/1998CN2281419Y Hydraulic assembled water distributing apparatus
05/13/1998CN2281418Y High pressure underground gas storing well
05/13/1998CN1038339C Firming agent for drilling waste mud and its producing method
05/12/1998US5749758 Vessel for production and/or loading/unloading and transport of hydrocarbons from offshore fields, and/or for carrying out well operations
05/12/1998US5749419 Completion apparatus and method
05/12/1998US5749416 Downhole pump drive head assembly
05/07/1998WO1998019042A2 Method and apparatus to isolate a formation zone
05/07/1998WO1998007955A3 System for cutting materials in wellbores
05/06/1998EP0839254A1 Branch boreholes
05/06/1998EP0699269A4 Method for placement of a scale inhibitor in a formation
05/06/1998CN1038270C Shell combustion fracturing bullet
05/06/1998CN1038269C Wax removing bullet for oil well
05/05/1998USRE35782 In-situ landfill pyrolysis, remediation and vitrification
05/05/1998US5746582 Through-tubing, retrievable downhole submersible electrical pump and method of using same
05/05/1998US5746274 One trip cement and gravel pack system
04/1998
04/30/1998WO1998017941A1 A process for treating a non-stabilized crude oil
04/29/1998EP0838518A2 Detergent mixtures
04/29/1998EP0745176B1 Gas lift system with retrievable gas lift valve
04/28/1998US5743717 Nozzle-venturi gas lift flow control device
04/28/1998US5743335 Well completion system and method
04/28/1998CA2125355C Horizontal drilling method for hydrocarbon recovery
04/28/1998CA2028723C Hydraulic running and release tool with mechanical emergency release
04/28/1998CA2011113C Multiple purpose liner hanger construction
04/23/1998DE19724430C1 Device for degassing waste deposit
04/23/1998CA2266624A1 Corrosion inhibitor for wellbore applications
04/22/1998EP0806070A4 Electrical connections to encased electronic devices
04/22/1998CN2279442Y Current-limiting contrallable peak voltage high-energy gas generator
04/22/1998CN2279441Y Secondary priming bar dropping device
04/22/1998CN1179510A Pumping unit
04/21/1998CA2057822C Water treatment agent
04/16/1998WO1998015850A1 Method of obtaining improved geophysical information about earth formations
04/16/1998WO1998015712A2 Method of forming wellbores from a main wellbore
04/16/1998WO1997047856A3 System and method for coupling two mutually mobile assemblies, in particular in submarine installations
04/15/1998EP0835359A1 Spiral or wave strip perforating system
04/15/1998EP0727008A4 Method for stimulation of liquid flow in a well
04/15/1998CN1179206A Hole in ground for transfer of geothermal energy to energy corrying liquid and method for production of the hole
04/15/1998CN1178861A Measuring device for voltage control instrument used for two phase separation in oil well
04/14/1998US5738388 Device for permanent joining of tubes
04/14/1998US5738170 Compact double screen assembly
04/14/1998US5738164 Arrangement for effecting an energy exchange between earth soil and an energy exchanger
04/09/1998WO1998014689A1 High density perforating gun system
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