| 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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| 12/14/2000 | DE19926388A1 Gammastrahlen-Dichteprofilsensor mit passiv gekühlten PIN-Photodioden Gamma-ray density profile sensor with passive cooling PIN photodiodes |
| 12/14/2000 | CA2371425A1 Controlling pressure and detecting control problems in gas-lift riser during offshore well drilling |
| 12/13/2000 | EP1058770A1 Energy recovery in a wellbore |
| 12/13/2000 | EP1058769A1 Apparatus for completing a subterranean well and method of using same |
| 12/13/2000 | EP1007819A4 Prepacked flush joint well screen |
| 12/13/2000 | EP0925423A4 Apparatus and method for perforating and stimulating a subterranean formation |
| 12/13/2000 | EP0917616A4 Particle control screen assembly |
| 12/13/2000 | EP0774042A4 Method of fracturing and propping a formation |
| 12/13/2000 | CN2410444Y Safety protective controller for thickened oil well pump |
| 12/13/2000 | CN2410418Y Static pressure eccentric tester joint for water injection well |
| 12/13/2000 | CN2410417Y High efficient composite perforator |
| 12/13/2000 | CN2410410Y High efficient injection-production dual-purpose energy-saving oil pipe for thickened oil |
| 12/12/2000 | US6159907 Paraffinic mixture that comprises (a) a total combined concentration of iso-paraffins and n-paraffins of at least about 90 weight percent (b) greater than 50 weight percent iso-paraffins |
| 12/12/2000 | US6158714 Adjustable orifice valve |
| 12/12/2000 | US6158517 Artificial aquifers in hydrologic cells for primary and enhanced oil recoveries, for exploitation of heavy oil, tar sands and gas hydrates |
| 12/12/2000 | US6158515 Artificial lifting device for well fluids using a continous loop |
| 12/12/2000 | US6158511 Apparatus and method for perforating and stimulating a subterranean formation |
| 12/12/2000 | US6158510 Steam distribution and production of hydrocarbons in a horizontal well |
| 12/12/2000 | US6158509 Method and apparatus for gathering liquid sample using a submersible pump |
| 12/12/2000 | US6158508 Method of operating a plant for the production of hydrocarbons |
| 12/12/2000 | US6158507 Well screen |
| 12/07/2000 | WO2000033492A9 Method and apparatus for remote actuation of a downhole device in a subsea well |
| 12/07/2000 | CA2310878A1 Lubrication and self-cleaning system for expansion mandrel |
| 12/06/2000 | EP1056926A1 Improvements in or relating to reducing water flow |
| 12/06/2000 | EP0728255B1 Control flask for polyphasic effluents and extraction assembly therefor |
| 12/06/2000 | CN2409335Y Device for removing sand and oil-water separator |
| 12/06/2000 | CN2409334Y Steam and gas mixed injector for thickened oil heating production |
| 12/06/2000 | CN1275556A Composition of high temp. resistant propellant for high tmep. well and synergistic perforator |
| 12/06/2000 | CN1275431A Petroleum sulfonate surfactant for oil field, its preparation process and use in tertiary oil recovery |
| 12/06/2000 | CN1275430A Lignin sulfonate surfactant for oil field, its preparation process and use in tertiary oil recovery |
| 12/06/2000 | CN1275429A Rhamnolipid biological surfactant its preparation process and use in tertiary oil recovery |
| 12/05/2000 | US6155348 Stimulating unconsolidated producing zones in wells |
| 12/05/2000 | US6155347 Method and apparatus for controlling the liquid level in a well |
| 12/05/2000 | US6155345 Downhole gas separator having multiple separation chambers |
| 12/05/2000 | US6155344 Downhole tool connection for live well deployment |
| 12/05/2000 | US6155343 System for cutting materials in wellbores |
| 12/05/2000 | US6155342 Proppant containment apparatus |
| 12/05/2000 | US6155150 Hydraulic tubing punch and method of use |
| 12/05/2000 | US6154953 Multi-tool system that can be used for connecting pipes |
| 12/04/2000 | CA2317032A1 Load bearing pump rotor tag bar |
| 11/29/2000 | EP1055798A2 Apparatus and method for setting a liner by hydraulic pressure |
| 11/29/2000 | CN2408237Y Wellhead free water remover |
| 11/29/2000 | CN2408236Y Energy saving anti-explosion electric heater for thick oil well |
| 11/29/2000 | CN2408235Y Well completion device for oil well with jet hole and sand-proof two function |
| 11/29/2000 | CN1274797A Sand-discharge oil production method and equipment |
| 11/29/2000 | CN1059010C Pressure index deciding method for block integral profile control for water packing-off |
| 11/28/2000 | US6152356 Hydraulic mining of tar sand bitumen with aggregate material |
| 11/28/2000 | US6152232 Underbalanced well completion |
| 11/28/2000 | US6152231 Wellhead drive brake system |
| 11/28/2000 | US6152226 System and process for secondary hydrocarbon recovery |
| 11/28/2000 | US6152218 Apparatus for reducing the production of particulate material in a subterranean well |
| 11/23/2000 | WO2000070185A1 Recovery of production fluids from an oil or gas well |
| 11/23/2000 | WO2000070183A1 In-tubing wellbore sidetracking operations |
| 11/23/2000 | WO2000029710A3 Wellbore flow control device |
| 11/23/2000 | WO2000012858A3 Shaped-charge liner |
| 11/22/2000 | EP1054136A2 Rotating porch for subsea branch and termination pipeline connections |
| 11/22/2000 | CN2407160Y Controller for crude oil worked-out |
| 11/22/2000 | CN2407122Y Spiral downhole oil and gas separator |
| 11/22/2000 | CN2407121Y Apparatus for downhole heating petroleum |
| 11/22/2000 | CN1274376A Composite proppant, composite filtration media and methods for making and using same |
| 11/21/2000 | US6149345 High-vacuum groundwater and soil remediation system and related method and apparatus |
| 11/21/2000 | US6148923 Auto-cycling plunger and method for auto-cycling plunger lift |
| 11/21/2000 | US6148921 Oil extracting installation incorporating manifold support mounting plates, and plate |
| 11/21/2000 | US6148916 Apparatus for releasing, then firing perforating guns |
| 11/21/2000 | US6148915 Apparatus and methods for completing a subterranean well |
| 11/21/2000 | US6148912 Subsurface measurement apparatus, system, and process for improved well drilling control and production |
| 11/21/2000 | US6148911 Method of treating subterranean gas hydrate formations |
| 11/21/2000 | US6148843 Variable orifice gas lift valve for high flow rates with detachable power source and method of using |
| 11/21/2000 | US6148730 Method and apparatus for controlled small-charge blasting by pressurization of the bottom of a drill hole |
| 11/19/2000 | CA2280558A1 Hollow tubing pumping system |
| 11/16/2000 | WO2000039428A3 Artificial aquifers in hydrologic cells for oil recovery |
| 11/16/2000 | WO2000037766A3 Procedures and equipment for profiling and jointing of pipes |
| 11/16/2000 | WO2000029716A3 Azimuth control of hydraulic vertical fractures in unconsolidated and weakly cemented soils and sediments |
| 11/16/2000 | WO2000029708A3 Method and apparatus for selective injection or flow control |
| 11/15/2000 | EP0752049B1 Gas lift flow control device |
| 11/15/2000 | CN1058547C Assembly and process for drilling and completing multiple wells |
| 11/14/2000 | US6146104 Groundwater recovery system incorporating a combination of pressure and vacuum to accomplish removal of groundwater fluids from a downhole pump |
| 11/14/2000 | US6146052 Dynamic control cable for use between a floating structure and a connection point on the seabed |
| 11/14/2000 | US6145590 Device for removing sand from pump plungers |
| 11/14/2000 | CA2158514C Method and apparatus for intermittent production of oil with a mechanical interface |
| 11/09/2000 | WO2000066882A1 Process for the producing of viscous oil with vapex using a vertical well |
| 11/09/2000 | WO2000066881A1 Optimizing charge phasing of a perforating gun |
| 11/09/2000 | WO2000066877A1 Ribbed sealing element and method of use |
| 11/08/2000 | CN2405009Y Equipment for downhole extracting sands |
| 11/08/2000 | CN2405008Y High stability perforation bullet |
| 11/08/2000 | CN1272587A Three-component composite displacement system formed from alkali, active agent and polymer and its application in tertiary oil recovery |
| 11/08/2000 | CN1272393A Alkyl benzene sulfonate surfactant, its preparation method and application in tertiary oil recovery |
| 11/07/2000 | US6143988 Coiled tubing supported electrical cable having indentations |
| 11/07/2000 | US6143069 Light weight high temperature well cement compositions and methods |
| 11/07/2000 | US6142708 Rotating porch for subsea branch and termination pipeline connections |
| 11/07/2000 | US6142246 Multiple lateral hydraulic drilling apparatus and method |
| 11/07/2000 | US6142237 Method for coupling and release of submergible equipment |
| 11/07/2000 | US6142236 Method for drilling and completing a subsea well using small diameter riser |
| 11/07/2000 | US6142232 Method and apparatus for cleaning wells |
| 11/07/2000 | US6142231 One-trip conveying method for packer/plug and perforating gun |
| 11/07/2000 | US6142230 Wellbore tubular patch system |
| 11/07/2000 | US6142229 Method and system for producing fluids from low permeability formations |
| 11/07/2000 | US6142224 Triple action pumping system with plunger valves |
| 11/07/2000 | CA2018493C Apparatus for extracting a liquid from a long tube |
| 11/02/2000 | WO2000065197A1 Method and system for increasing oil production from an oil well producing a mixture of oil and gas |