| 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) |
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| 05/02/1997 | EP0559783B1 Method for treating subterranean formations and hydraulic fluid containing capsules for use therein |
| 05/01/1997 | WO1997015748A1 Completion assembly for wellbores |
| 05/01/1997 | WO1997015747A1 Assembly and process for drilling and completing multiple wells |
| 04/30/1997 | CN1148660A Mineralizing gradient water-filling method for low-permeable reservoir |
| 04/29/1997 | US5624560 Wire mesh filter including a protective jacket |
| 04/29/1997 | US5623993 Method and apparatus for sealing and transfering force in a wellbore |
| 04/29/1997 | US5623992 Introducing oxygen containing gas and soluble nitrogen into multiplicity of closely spaced aeration columns in soil extending below groundwater depth; rising oxygenated water circulates through soil where microorganisms degrade gasoline |
| 04/29/1997 | CA2131195C Method of improving oil and gas well productivity |
| 04/23/1997 | EP0685020A4 Method and system for remediation of groundwater contamination. |
| 04/23/1997 | EP0683837A4 Method and system for remediation of groundwater contamination. |
| 04/22/1997 | US5622450 Pressure extraction process for removing soil and groundwater contaminants |
| 04/22/1997 | US5622231 Cutting head |
| 04/22/1997 | US5622222 For use in a corrosive environment |
| 04/22/1997 | US5622211 Preperforated coiled tubing |
| 04/17/1997 | WO1997013593A1 A method for introducing materials into a solid or semi-solid medium |
| 04/17/1997 | CA2239978A1 A method for introducing materials into a solid or semi-solid medium |
| 04/16/1997 | EP0767699A1 Suppression of slug flow in a multi-phase fluid stream |
| 04/15/1997 | US5621845 Apparatus for electrode heating of earth for recovery of subsurface volatiles and semi-volatiles |
| 04/15/1997 | US5620050 Method for setting hydraulic packers that enable placement of gravel pack in a downhole oil and gas well |
| 04/15/1997 | US5620049 Method for increasing the production of petroleum from a subterranean formation penetrated by a wellbore |
| 04/15/1997 | US5620048 Oil-well installation fitted with a bottom-well electric pump |
| 04/12/1997 | CA2186546A1 Universal perforating gun firing head |
| 04/10/1997 | WO1997012947A1 Cleaning compositions for oil and gas wells, lines, casings, formations and equipment and methods of use |
| 04/09/1997 | CN2251617Y Obtaining oil complete sets of device by screw pump and jet pump |
| 04/09/1997 | CN1147054A Well perforator and acidizing treatment device |
| 04/08/1997 | US5619008 High density perforating system |
| 04/08/1997 | US5618417 Water aeration system |
| 04/08/1997 | US5617921 Over-pressured well fracturing with surface reservoir and actuator system |
| 04/08/1997 | US5617919 Gravel-packing apparatus and method |
| 04/03/1997 | WO1997012119A1 Modified continuous drive drainage process |
| 04/03/1997 | WO1997012118A1 Method and system for the treatment of a well stream from an offshore oil field |
| 04/03/1997 | WO1997012114A1 Method of producing a cased extraction hole |
| 04/03/1997 | WO1997012113A1 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means |
| 04/03/1997 | WO1997012112A1 Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access |
| 04/03/1997 | WO1997006402A3 Controlled small-charge blasting by explosive |
| 04/03/1997 | DE19535906A1 Verfahren zur Herstellung einer verrohrten Gewinnungsbohrung A process for producing a cased production borehole |
| 04/03/1997 | CA2232867A1 Treatment of a well stream from an offshore oil field |
| 04/03/1997 | CA2180267A1 Modified continuous drive drainage process |
| 04/02/1997 | CN2251044Y Petroleum production aid |
| 04/02/1997 | CN2251043Y Water-hammer vibration for oil well and water well |
| 04/02/1997 | CN2251042Y Anti-seizing sand retention device for oil field deep well pump |
| 04/02/1997 | CN2251041Y Concentric spraying well-points dewatering equipment |
| 04/02/1997 | CN1146526A Sand controller for crude oil well end |
| 04/01/1997 | US5616006 Pumping method and device with sequential jets |
| 04/01/1997 | US5615739 Apparatus and method for completing and recompleting wells for production |
| 04/01/1997 | CA2066912C Submersible well pump gas separator |
| 03/27/1997 | WO1997011254A1 A method of separating production fluid from an oil well |
| 03/27/1997 | CA2231543A1 A method of separating production fluid from an oil well |
| 03/27/1997 | CA2183613A1 Scavenger system and electrical submersible pumps (esp's) |
| 03/26/1997 | EP0764235A1 Method for fracturing and propping a subterranean formation |
| 03/26/1997 | CN2250421Y Booster |
| 03/26/1997 | CN1034321C Drive system for turning a swivel |
| 03/25/1997 | US5613567 Process for completing a well |
| 03/25/1997 | CA2141111C Method of improving oil and gas well productivity |
| 03/20/1997 | WO1997010437A1 Wellhead drive brake system |
| 03/20/1997 | WO1997010412A1 Tool for blocking axial flow in gravel-packed well annulus |
| 03/19/1997 | CN2249823Y Medial and short radium sand screening pipe for horizontal wells |
| 03/19/1997 | CN2249822Y Oil and sand separator with metal cotton filtering ring |
| 03/19/1997 | CN2249821Y Tower-rocker-arm above-setting two action long range oil sucker |
| 03/18/1997 | US5611671 Pumping system for groundwater sampling |
| 03/18/1997 | US5611642 Remediation apparatus and method for organic contamination in soil and groundwater |
| 03/18/1997 | US5611547 Elongated seal assembly for sealing well tubing-to liner annulus |
| 03/18/1997 | US5611402 Method of in-situ remediation of volatile contaminants from soils and/or rock |
| 03/18/1997 | US5611401 One-trip conveying method for packer/plug and perforating gun |
| 03/18/1997 | US5611399 Screen and method of manufacturing |
| 03/18/1997 | US5611397 Reverse Moineau motor and centrifugal pump assembly for producing fluids from a well |
| 03/18/1997 | CA2129614C Coiled tubing concentric gas lift assembly |
| 03/18/1997 | CA2120798C Annular safety system |
| 03/13/1997 | WO1997009513A1 Gutter for a hose for transfer of oil between two floating structures |
| 03/13/1997 | WO1997009511A1 Method of acoustically treating the productive zone of oil and gas wells and a device for carrying out the method |
| 03/13/1997 | WO1997009508A1 Method and apparatus for drilling multiple wells from a low load platform |
| 03/12/1997 | EP0761323A1 Method of decontaminating polluted soils and drill head for carrying out the method |
| 03/12/1997 | EP0760900A1 Process for the best possible extraction of gas in a large coal seam which has not or only limitedly been prospected |
| 03/12/1997 | EP0760895A1 Lateral drilling method |
| 03/12/1997 | CA2185067A1 Production wells having permanent downhole formation evaluation sensors |
| 03/11/1997 | US5609207 Epoxy resin composition and well treatment method |
| 03/11/1997 | US5609204 Isolation system and gravel pack assembly |
| 03/11/1997 | CA2022144C Geothermal well chemical injection system |
| 03/06/1997 | WO1997008459A1 An improved electrical submersible pump and methods for enhanced utilization of electrical submersible pumps in the completion and production of wellbores |
| 03/06/1997 | WO1997008427A1 Method of treating the critical zone of a bed and a device for applying the method |
| 03/06/1997 | WO1997008082A1 Method for the handling, storage and transport of petroleum |
| 03/06/1997 | WO1997007870A1 Filter assembly |
| 03/06/1997 | DE19532493A1 Determining depth of blanket mirror in salt cavern |
| 03/05/1997 | EP0604568B1 Downhole activated system for perforating a wellbore |
| 03/05/1997 | CN2248777Y Equipment for seismic oil prodn. |
| 03/04/1997 | US5607903 Artificial lift for oil wells, air flow, discharging flue gas in coolers to cyclones, compression |
| 03/04/1997 | US5607018 Viscid oil well completion |
| 03/04/1997 | US5607016 Injecting displacement gas and liquid vaporizable hydrocarbon solvent |
| 02/27/1997 | WO1997007321A1 In situ combustion using ammonium nitrate as oxygene source |
| 02/26/1997 | EP0639240B1 Microencapsulated oil field chemicals and process for their use |
| 02/26/1997 | CN1143992A Method of producing fluid from earth formation |
| 02/26/1997 | CN1143712A Flow increasing equipment for oil well, gas well and water well |
| 02/25/1997 | US5605193 Downhole gas compressor |
| 02/23/1997 | CA2183841A1 Expendable charge case holder |
| 02/20/1997 | WO1997006402A2 Controlled small-charge blasting by explosive |
| 02/20/1997 | WO1997006347A1 Above production disposal tool |
| 02/20/1997 | WO1997006346A1 Inflatable tubular sleeve for tubing or obturating a well or a pipe |
| 02/20/1997 | WO1997006345A1 Device and process for the lining of a pipe branch, particularly in an oil well |
| 02/20/1997 | WO1997006343A1 Self-aligning stuffing box for pumpjack units |
| 02/20/1997 | WO1997006319A1 Piston valve |