| 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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| 02/01/1996 | DE4439546C1 Method for permanent closure of earth drillings |
| 01/31/1996 | EP0694676A1 Installation for oil well |
| 01/31/1996 | EP0694157A1 Expendable ebw firing module for detonating perforating gun charges |
| 01/31/1996 | EP0613406B1 Vacuum apparatus and process for in-situ removing underground liquids and vapors |
| 01/31/1996 | CN1030860C Device for mounting a flexible line comprising a curvature limiter |
| 01/30/1996 | US5487425 Composition and method for recovery of petroleum and gas |
| 01/30/1996 | CA1338022C Well production optimizing system |
| 01/25/1996 | WO1996001937A1 Preform, device and method for casing a well |
| 01/25/1996 | DE4425712A1 Verfahren zur Anreicherung des Methangehaltes eines Grubengases Method for enriching the methane content of mine gas |
| 01/24/1996 | CN2218250Y Digital oil production apparatus using residue well pressure |
| 01/24/1996 | CN2218249Y Digital controlling oil production apparatus |
| 01/24/1996 | CN1115272A Petroleum casing large angle ladder-shape seam processing method and its apparatus |
| 01/23/1996 | US5485882 Low-density ball sealer for use as a diverting agent in hostile environment wells |
| 01/17/1996 | EP0692610A2 Downhole sleeve valve and stimulation tool |
| 01/17/1996 | EP0691878A1 Filter |
| 01/17/1996 | CN1115185A Assembly and process for drilling and completing multiple wells |
| 01/16/1996 | US5484985 Contaminant extraction system |
| 01/16/1996 | US5484023 Floating layer recovery apparatus |
| 01/16/1996 | US5484018 Method for accessing bypassed production zones |
| 01/16/1996 | US5484017 Whipstock assembly for a sleeved casing |
| 01/16/1996 | US5483988 Spoolable coiled tubing mandrel and gas lift valves |
| 01/16/1996 | US5483895 For use in an earth borehole |
| 01/11/1996 | WO1996000821A1 Preperforated coiled tubing |
| 01/11/1996 | WO1996000604A1 Suppression of slug flow in a multi-phase fluid stream |
| 01/11/1996 | CA2193864A1 Preperforated coiled tubing |
| 01/10/1996 | EP0691454A1 Fluid systems for controlling fluid losses during hydrocarbon recovery operations |
| 01/10/1996 | CN2217100Y Device for automatically adjusting rod stroke |
| 01/09/1996 | US5482402 Method and apparatus for heating subsurface soil for decontamination |
| 01/09/1996 | US5482227 Device for a curved conductor pipe for a pull wire |
| 01/09/1996 | US5482122 Oriented-radial-cores retrieval for measurements of directional properties |
| 01/09/1996 | US5482117 Gas-liquid separator for well pumps |
| 01/09/1996 | US5482116 Wellbore guided hydraulic fracturing |
| 01/09/1996 | US5481927 Vapor port and groundwater sampling well |
| 01/09/1996 | CA2051081C Method of inhibiting corrosion in acidizing wells |
| 01/06/1996 | CA2153207A1 Multiple-phase flow jet pump |
| 01/06/1996 | CA2153190A1 Intermittent jet pumping apparatus and method |
| 01/03/1996 | EP0689637A1 Method and device for cementing a well |
| 01/03/1996 | CN2216588Y Hydraulic pulse distributing tap for water distributor |
| 01/03/1996 | CN2216587Y Drip |
| 01/02/1996 | US5479989 Sleeve valve flow control device with locator shifter |
| 01/02/1996 | US5479860 Apparatus for perforating an earth formation from a borehole |
| 12/29/1995 | CA2152310A1 Oxidant enhanced water injection into a subterranean formation to augment hydrocarbon recovery |
| 12/28/1995 | WO1995035445A1 Process and device for raising liquids from wells |
| 12/27/1995 | CN1030582C Water oil pumping device for sealed well |
| 12/26/1995 | US5478504 Method and apparatus for eliminating severe slug in multi-phase flow subsea lines |
| 12/26/1995 | US5477925 Method for multi-lateral completion and cementing the juncture with lateral wellbores |
| 12/26/1995 | US5477924 Method for producing hydrocarbon from an unknown reservoir |
| 12/26/1995 | US5477923 Wellbore completion using measurement-while-drilling techniques |
| 12/26/1995 | US5477785 Well pipe perforating gun |
| 12/21/1995 | WO1995034742A1 Sand filter system for use in a well |
| 12/20/1995 | CN1113538A Process and apparatus for oil recovering on ground by negative pressure |
| 12/19/1995 | US5476992 Introducing material for treating contaminants; transmitting direct electric current through low permeability soil region causing electroosmotic flow; applying hydraulic gradient |
| 12/19/1995 | US5476588 Multi-layer composite screen |
| 12/19/1995 | US5476145 Selective placement of a permeability-reducing material in a subterranean interval to inhibit vertical flow through the interval |
| 12/19/1995 | US5476143 Well screen having slurry flow paths |
| 12/19/1995 | CA2002164C Running tool for liner hanger |
| 12/14/1995 | WO1995033915A1 Method for fracturing and propping a subterranean formation |
| 12/14/1995 | WO1995033892A1 Offshore construction and vessel |
| 12/14/1995 | DE19516438A1 Device and process for producing horizontal filtered wells |
| 12/13/1995 | EP0686069A1 A method and a system for exploitation of gas from waste disposal sites |
| 12/13/1995 | CN2215020Y Gasification in situ numerically controlled ground control device for use in coal mine |
| 12/13/1995 | CN2215019Y Numerically controlled oil-pumping and water-filling combine using wind energy |
| 12/13/1995 | CN2215018Y High-temp. sintered metal-ceramic composite filter |
| 12/13/1995 | CN1030513C Numerically-controlled output-distributing valve for oil well |
| 12/12/1995 | US5474685 Apparatus and method for detecting and recovering immiscible liquids of different densities |
| 12/12/1995 | US5474601 Integrated floating platform vertical annular separation and pumping system for production of hydrocarbons |
| 12/12/1995 | US5474131 Method for completing multi-lateral wells and maintaining selective re-entry into laterals |
| 12/12/1995 | US5474129 Cavity induced stimulation of coal degasification wells using foam |
| 12/12/1995 | US5474128 Telescoping conduits for increasing the fluid resistance of well production tubing inadvertently dropped in an oil or gas well |
| 12/12/1995 | US5474127 Annular safety system for oil well |
| 12/07/1995 | WO1995033122A1 Method for enhanced recovery of coal bed methane |
| 12/07/1995 | WO1995033119A1 Drilling apparatus |
| 12/07/1995 | WO1995032817A1 Groundwater recovery systems |
| 12/06/1995 | EP0685020A1 Method and system for remediation of groundwater contamination |
| 12/06/1995 | CN2214523Y Anti-sand screening tube with metal sandwich |
| 12/06/1995 | CN2214522Y Concrete balance block for beam-pumping unit |
| 12/06/1995 | CN2214521Y Water filling well integrated valve |
| 12/05/1995 | US5472294 Purification |
| 12/05/1995 | US5472055 Liner hanger setting tool |
| 12/05/1995 | US5472054 Free pumping apparatus safety valve system and method |
| 12/05/1995 | US5472050 Use of sequential fracturing and controlled release of pressure to enhance production of oil from low permeability formations |
| 12/05/1995 | US5472049 For remediating an underground formation containing contaminated groundwater |
| 12/05/1995 | US5472048 Parallel seal assembly |
| 11/30/1995 | WO1995032357A1 Process for the best possible extraction of gas in a large coal seam which has not or only limitedly been prospected |
| 11/30/1995 | WO1995032353A1 Lateral drilling method |
| 11/30/1995 | DE4418388A1 Ground=water oil slick removal system |
| 11/30/1995 | DE4418015A1 Method of optimum gas recovery, esp. in hard coal deposits |
| 11/30/1995 | CA2191076A1 Lateral drilling method |
| 11/29/1995 | EP0683846A1 A system for use in offshore petroleum production |
| 11/29/1995 | EP0683837A1 Method and system for remediation of groundwater contamination |
| 11/29/1995 | CN2213842Y Strong-magnetic high-frequency filling apparatus for water flooding well |
| 11/29/1995 | CN2213841Y Multi-line circulation type hot pipe wellhead crude oil heater |
| 11/28/1995 | US5470823 Stimulation of coalbed methane production |
| 11/28/1995 | US5469878 Coiled tubing concentric gas lift valve assembly |
| 11/22/1995 | CN2213230Y Auxiliary pump device for oil well |
| 11/22/1995 | CN1112188A Gasifying method for coal seam |
| 11/21/1995 | US5468097 Method of circulating ground water in ground regions with a fall of ground water level |
| 11/21/1995 | US5468088 Feedback control of groundwater remediation |
| 11/21/1995 | US5467823 Methods and apparatus for long term monitoring of reservoirs |
| 11/21/1995 | CA2039965C Foaming agents for carbon dioxide and steam floods |