| 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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| 03/27/2002 | CN1081716C Adapter for oil well tubings |
| 03/27/2002 | CA2321316A1 Technique for treating hydrocarbon wells |
| 03/26/2002 | US6361272 Centrifugal submersible pump |
| 03/26/2002 | CA2212840C Sand exclusion liner for use in a wellbore |
| 03/26/2002 | CA2055555C Hydraulic packoff and casing hanger installation tool |
| 03/21/2002 | WO2002023011A1 Evaluation of multilayer reservoirs |
| 03/21/2002 | WO2002023010A1 Real-time reservoir fracturing process |
| 03/21/2002 | WO2002023009A2 Multi layer screen for downhole use. |
| 03/21/2002 | WO2002023007A1 Liner hanger with sliding sleeve valve |
| 03/21/2002 | WO2002023006A2 Concentric tubing completion system |
| 03/21/2002 | WO2001081717A3 Method for treating a hydrocarbon-containing formation |
| 03/21/2002 | WO2001073262A3 Sand removal and device retrieval tool |
| 03/21/2002 | WO2001073260A3 Multiport gate valve assembly |
| 03/21/2002 | WO2001066909A3 Lightweight compositions and methods for well treating |
| 03/21/2002 | WO2001061148A3 Filter cake cleanup and gravel pack methods for oil based or water based drilling fluids |
| 03/21/2002 | US20020035307 Pyrolysis |
| 03/21/2002 | US20020034380 In situ thermal processing of a coal formation with a selected moisture content |
| 03/21/2002 | US20020033280 In situ thermal processing of a coal formation with carbon dioxide sequestration |
| 03/21/2002 | US20020033266 Annular flow restrictor for electrical submersible pump |
| 03/21/2002 | US20020033265 Mineral acid enhanced thermal treatment for viscosity reduction of oils (ECB-0002) |
| 03/21/2002 | US20020033264 Method and apparatus to reduce trapped pressure in a downhole tool |
| 03/21/2002 | US20020033261 Downhole apparatus |
| 03/21/2002 | US20020033259 Sand control method and apparatus |
| 03/21/2002 | US20020033257 In situ thermal processing of hydrocarbons within a relatively impermeable formation |
| 03/21/2002 | US20020033256 Process control; heating |
| 03/21/2002 | US20020033255 In situ thermal processing of a hydrocarbon containing formation in a hydrogen-rich environment |
| 03/21/2002 | US20020033254 In situ thermal processing of a coal formation to control product composition |
| 03/21/2002 | US20020033253 In situ thermal processing of a hydrocarbon containing formation using insulated conductor heat sources |
| 03/21/2002 | US20020033043 Multiphase flow measurement system |
| 03/21/2002 | CA2641577A1 Method of forming a downhole filter |
| 03/21/2002 | CA2320609A1 Rotor hanger |
| 03/20/2002 | EP1188074A1 Method and installation for tapping fresh water and detecting fresh water source at sea |
| 03/20/2002 | EP1187966A1 Controlling pressure and detecting control problems in gas-lift riser during offshore well drilling |
| 03/20/2002 | EP0937192A4 Groundwater recovery system |
| 03/20/2002 | EP0885346A4 Method and well tool for gravel packing a well using low-viscosity fluids |
| 03/20/2002 | CN2482595Y Large-passageway efficient oil-well pump |
| 03/20/2002 | CN1081288C Method for extracting superthick oil |
| 03/20/2002 | CN1081287C Method for producing oil from thick oil well and its device |
| 03/20/2002 | CN1081286C Method for producing thick oil and microwave cracking furnace |
| 03/20/2002 | CN1081285C Inspection system of oil extracting equipment working state |
| 03/20/2002 | CN1081284C Fluid exploiting method and equipment utilizing gas |
| 03/19/2002 | US6357552 Submersible pump assembly for downhole use |
| 03/19/2002 | US6357530 System and method of utilizing an electric submergible pumping system in the production of high gas to liquid ratio fluids |
| 03/19/2002 | US6357523 Drainage pattern with intersecting wells drilled from surface |
| 03/19/2002 | CA2214786C Flow meter |
| 03/19/2002 | CA2034806C Process and apparatus for transporting and processing natural gas |
| 03/14/2002 | WO2002020943A1 Electrical submersible pumps in the riser section of subsea well flowline |
| 03/14/2002 | WO2002020939A1 Method and system for perforating |
| 03/14/2002 | WO2001089068A3 Method for boosting the output voltage of a variable frequency drive |
| 03/14/2002 | WO2001088335B1 Dual purpose device |
| 03/14/2002 | US20020030325 Ribbed sealing element and method of use |
| 03/14/2002 | US20020030001 Apparatus for in-situ deep well cleaning of contaminated groundwater |
| 03/14/2002 | US20020029889 Deviated borehole drilling assembly |
| 03/14/2002 | US20020029886 Wellbore flow control device |
| 03/14/2002 | US20020029885 In situ thermal processing of a coal formation using a movable heating element |
| 03/14/2002 | US20020029884 In situ thermal processing of a coal formation leaving one or more selected unprocessed areas |
| 03/14/2002 | US20020029883 System and method for fluid flow optimization |
| 03/14/2002 | US20020029882 In situ thermal processing of a hydrocarbon containing formation leaving one or more selected unprocessed areas |
| 03/14/2002 | US20020029881 In situ thermal processing of a hydrocarbon containing formation using conductor in conduit heat sources |
| 03/14/2002 | US20020029878 Well head lubricator assembly with polyurethane impact-absorbing spring |
| 03/13/2002 | EP1185856A2 Gamma ray density profile sensor with passively cooled pin photodiodes |
| 03/13/2002 | CN2481876Y Beam compressor |
| 03/13/2002 | CN2481848Y Automatic controlled dosing device for oil well |
| 03/13/2002 | CN1080854C Process for moving highly viscous petroleum products and dispensing liquid in water thereof |
| 03/13/2002 | CN1080805C 活塞阀 Piston valve |
| 03/12/2002 | US6356844 System and method for real time reservoir management |
| 03/12/2002 | US6354381 Generating chemical microexplosions in the reservoir by decomposing in situ at least one imidazolidone derivative, thereby generating heat, shock, and co2. |
| 03/12/2002 | US6354378 Method and apparatus for formation isolation in a well |
| 03/12/2002 | US6354377 Gas displaced chamber lift system having gas lift assist |
| 03/12/2002 | US6354374 Method of performing downhole functions |
| 03/12/2002 | US6354373 Expandable tubing for a well bore hole and method of expanding |
| 03/12/2002 | US6354371 Jet pump assembly |
| 03/12/2002 | US6354345 Pumping system |
| 03/12/2002 | US6354219 Compressed powdered metal mixture of 0.5% to 25% molybdenum, 60% to 85% tungsten, with other ductile malleable metals comprising 10% to 35%, and up to 1% graphite; molybdenum allows a higher density liner to be formed |
| 03/12/2002 | CA2228416C Enhanced lift method and apparatus for the production of hydrocarbons |
| 03/07/2002 | WO2002018746A1 A method and a system for injecting a gas into a reservoir |
| 03/07/2002 | WO2002018744A2 Optimization of oil well production with deference to reservoir and financial uncertainty |
| 03/07/2002 | WO2002018743A1 Multi zone isolation tool and method for subterranean wells |
| 03/07/2002 | WO2001069033A3 Oil-recovery device |
| 03/07/2002 | US20020028070 Heating system for crude oil transporting metallic tubes |
| 03/07/2002 | US20020027004 Computer controlled injection wells |
| 03/07/2002 | US20020027002 Downhole flow control devices |
| 03/07/2002 | US20020027001 In situ thermal processing of a coal formation to produce a selected gas mixture |
| 03/06/2002 | EP1184538A1 System for downhole separation |
| 03/06/2002 | EP1184537A2 A method of stimulating a well |
| 03/06/2002 | EP1184536A2 Method and apparatus for installing casing in a well |
| 03/06/2002 | EP0852657A4 Tool for blocking axial flow in gravel-packed well annulus |
| 03/06/2002 | CN2480583Y Large quantity oil pump |
| 03/06/2002 | CN2480546Y Doiuble-liquid method light polymer mixer |
| 03/06/2002 | CN2480545Y Downhole fixed pressure opened constant flow water-making up apparatus |
| 03/06/2002 | CN2480544Y Six-lever swing type walking beam oil pump |
| 03/06/2002 | CN2480543Y Ground electric ball-throwing device for ball block gas lifting |
| 03/06/2002 | CN1339083A Method for creating secondary sidetracks in a well system |
| 03/06/2002 | CN1339082A Multilateral well and electrical transmission system |
| 03/06/2002 | CN1338561A Hydraulic spray pump with sampler |
| 03/06/2002 | CN1338560A Pumping unit of oil well |
| 03/06/2002 | CN1080366C Pump-off controller |
| 03/06/2002 | CN1080365C Apparatus and method for perforating and stimulating subterranean formation |
| 03/06/2002 | CN1080364C Improvement in deep well pump apparatus |
| 03/05/2002 | US6353706 Optimum oil-well casing heating |