| 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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| 03/05/2002 | US6352387 Recirculation-enhanced subsurface reagent delivery system |
| 03/05/2002 | US6352117 Oil lift system |
| 03/05/2002 | US6352115 Device for fitting an oil pipe stiffening sleeve on a support structure |
| 03/05/2002 | US6352113 Method and apparatus to remove coiled tubing deployed equipment in high sand applications |
| 03/05/2002 | US6352112 Flexible swage |
| 03/05/2002 | US6352111 Filter for subterranean wells |
| 03/05/2002 | US6352109 Method and apparatus for gas lift system for oil and gas wells |
| 03/05/2002 | US6352108 Well pipe |
| 03/05/2002 | US6352107 Wear resistant well pump rod and method for making same |
| 03/05/2002 | CA2305118C Water treatment process for thermal heavy oil recovery |
| 02/28/2002 | WO2002016735A1 Method and well tool for gravel packing a well using low viscosity fluids |
| 02/28/2002 | WO2002016734A1 Modular seabed processing system |
| 02/28/2002 | WO2002016733A1 Hydrate formation prevention in subsea equipment with phase change material |
| 02/28/2002 | WO2002016732A1 Self-regulating heat source for subsea equipment |
| 02/28/2002 | WO2002016724A2 Expandable coupling |
| 02/28/2002 | WO2001073261A3 Riser with retrievable internal services |
| 02/28/2002 | WO2000075477A8 Controlling pressure and detecting control problems in gas-lift riser during offshore well drilling |
| 02/28/2002 | US20020023781 Method and apparatus for lateral well drilling utilizing a rotating nozzle |
| 02/28/2002 | US20020023758 Deviated borehole drilling assembly |
| 02/28/2002 | US20020023757 Deviated borehole drilling assembly |
| 02/28/2002 | US20020023756 Deviated borehole drilling assembly |
| 02/28/2002 | US20020023750 Gas separator with automatic level control |
| 02/28/2002 | US20020023747 Deviated borehole drilling assembly |
| 02/28/2002 | US20020023746 Methods of downhole testing subterranean formations and associated apparatus therefor |
| 02/28/2002 | US20020023745 Deviated borehole drilling assembly |
| 02/28/2002 | US20020023505 Apparatus for passive removal of subsurface contaminants and volume flow measurement |
| 02/28/2002 | DE19955973C1 Filterrohr zum Einbringen in ein Bodenbohrloch sowie Verfahren zur Herstellung des Filterrohrs Filter pipe for insertion into a borehole bottom and processes for preparing the filter tube |
| 02/28/2002 | CA2356493A1 Methods and apparatus for creating a downhole buoyant casing chamber |
| 02/27/2002 | EP1182327A1 Apparatus and method for propelling a data sensing apparatus into a subsurface formation |
| 02/27/2002 | EP1181432A1 Method of creating a wellbore |
| 02/27/2002 | EP1062297B1 A method of improving the flow properties of a crude oil or natural gas liquid |
| 02/27/2002 | EP1042583B1 Apparatus and method for injecting treatment fluids into an underground formation |
| 02/27/2002 | EP0879342B1 Wireline/coiled tubing retrievable well pump |
| 02/27/2002 | CN2479253Y Ring valve of tubing liner pump |
| 02/27/2002 | CN2479252Y Eccentric valve type steam oil-well pump |
| 02/27/2002 | CN2479251Y Plunger self-rotating oil-well pump |
| 02/27/2002 | CN2479250Y Sand control oil well pump with grooved pump barrel |
| 02/27/2002 | CN2479249Y Forced recovery deep oil well pump |
| 02/27/2002 | CN2479248Y Automatic speed-regulating driving wheel |
| 02/27/2002 | CN2479247Y Self-anchored rod pump |
| 02/27/2002 | CN2479209Y Press expanding loose oil well production-increasing means |
| 02/27/2002 | CN2479208Y Boiler steam equidryness distributor |
| 02/27/2002 | CN2479207Y Mechanical automatic water flow regulator |
| 02/27/2002 | CN2479206Y Branch oil production downhole pipe string |
| 02/27/2002 | CN2479205Y Cross-country moving oil-production machine |
| 02/27/2002 | CN2479204Y Ultraheavy oil injection-production and sand-fill and -control integrated pipe string |
| 02/27/2002 | CN1079887C Oil production well and assembly of such wells |
| 02/27/2002 | CN1079886C Inflatable tubular sleeve for tubing or obturating well or pipe |
| 02/27/2002 | CN1079885C Flameless combustor and its ignition method |
| 02/27/2002 | CN1079879C Drilling device, drilling system and drilling method |
| 02/27/2002 | CN1079781C Method for clarification of emulsified oil from oil field water |
| 02/26/2002 | US6350375 Arrangement in a separator |
| 02/26/2002 | US6349769 Apparatus and method for establishing branch wells from a parent well |
| 02/26/2002 | US6349766 Chemical actuation of downhole tools |
| 02/26/2002 | US6349765 Water pressure system |
| 02/21/2002 | WO2002014647A1 Method and apparatus for wellbore separation of hydrocarbons from contaminants with reusable membrane units containing retrievable membrane elements |
| 02/21/2002 | WO2002014453A1 Formation stabilization |
| 02/21/2002 | WO2002013983A1 Methods of extracting liquid hydrocarbon contaminants from underground zones |
| 02/21/2002 | WO2001073325A3 Gate valve |
| 02/21/2002 | US20020020535 Reservoir communication with a wellbore |
| 02/21/2002 | US20020020533 Production well telemetry system and method |
| 02/21/2002 | US20020020531 Method and apparatus for cementing branch wells from a parent well |
| 02/21/2002 | US20020020527 Combined liner and matrix system |
| 02/21/2002 | US20020020524 Expandable liner and associated methods of regulating fluid flow in a well |
| 02/21/2002 | US20020020215 Apparatus and method to obtain representative samples of oil well production |
| 02/21/2002 | DE10120107C1 Waste dump treatment method uses spaced gas burners for burning off waste gases and distribution of seepage water across dump surface |
| 02/20/2002 | EP1180195A1 Casing conveyed perforating process and apparatus |
| 02/20/2002 | CN2477828Y Energy saving hot water circulating tubular column |
| 02/20/2002 | CN2477827Y High pressure water filling integrated utilizer of oil field |
| 02/20/2002 | CN2477826Y Hoisting-hanging crowfoot |
| 02/20/2002 | CN2477825Y Mobile oil field nitrogen injecting appts. |
| 02/20/2002 | CN2477824Y Compound beam energy saving pumping unit |
| 02/20/2002 | CN2477823Y Oil producing appts. having two-tube pillar and vane pump |
| 02/20/2002 | CN2477822Y Well sucker-rod pump oil extracting machine |
| 02/20/2002 | CN1079487C Use of single molecular di-quaternary ammonium salt |
| 02/20/2002 | CN1079486C Displacement composition and injection for displacement of reservior oil |
| 02/20/2002 | CN1079485C Pumping oil unit |
| 02/20/2002 | CN1079484C Section regulation process for water injection well |
| 02/19/2002 | US6347673 Perforating guns having multiple configurations |
| 02/14/2002 | WO2002012675A1 Method for secondary oil recovery |
| 02/14/2002 | WO2002012637A1 Underground water pumping device |
| 02/14/2002 | WO2002012113A1 Web-based system and method for evaluating oil and gas properties |
| 02/14/2002 | US20020018868 Multilayer; radiation transparent protective coating |
| 02/14/2002 | US20020017387 Methods of downhole testing subterranean formations and associated apparatus therefor |
| 02/14/2002 | US20020017386 Methods of downhole testing subterranean formations and associated apparatus therefor |
| 02/13/2002 | EP1179116A1 Recovery of production fluids from an oil or gas well |
| 02/13/2002 | EP1179115A1 In-tubing wellbore sidetracking operations |
| 02/13/2002 | EP1178922A2 Satellite separator platform (ssp) |
| 02/13/2002 | EP1032473B1 Device and method for separating a heterogeneous mixture |
| 02/13/2002 | CN2476657Y Piston rotation mechanism |
| 02/13/2002 | CN2476656Y Low resistance plunger assembly |
| 02/13/2002 | CN2476655Y Side-valve suction driving oil-well pump |
| 02/13/2002 | CN2476641Y Automatic control device for beam-pumping unit |
| 02/13/2002 | CN1335450A Petroleum peptide PCR-petroleum enzyme, coenzyme and its special activator |
| 02/13/2002 | CN1079134C Firing head of perforating gun |
| 02/07/2002 | WO2002010554A1 Fracturing different levels within a completion interval of a well |
| 02/07/2002 | WO2002010551A1 Liner hanger with slip joint sealing members and method of use |
| 02/07/2002 | WO2002010550A1 Liner hanger with standoffs |
| 02/07/2002 | WO2002010546A2 Method and apparatus for formation damage removal |
| 02/07/2002 | US20020016679 System and method for real time reservoir management |