| 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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| 08/16/2000 | CN1263202A Sandstone acid |
| 08/16/2000 | CN1055515C Regeneration method for oil-field gun perforator barrel |
| 08/15/2000 | US6102673 Subsea mud pump with reduced pulsation |
| 08/15/2000 | US6102623 In-well air stripping, oxidation, and adsorption |
| 08/15/2000 | US6102622 Remediation method |
| 08/15/2000 | US6102126 Pressure-actuated circulation valve |
| 08/15/2000 | US6102125 Coiled tubing workover riser |
| 08/15/2000 | US6102124 Flying lead workover interface system |
| 08/15/2000 | US6102120 Zone isolation tools |
| 08/10/2000 | WO2000046484A1 Method for creating secondary sidetracks in a well system |
| 08/10/2000 | WO2000046479A1 Multilateral well and electrical transmission system |
| 08/09/2000 | EP1025604A1 Producing electrical energy from natural gas using a solid oxide fuel cell |
| 08/09/2000 | EP1025338A1 Production fluid control device for oil/gas wells |
| 08/09/2000 | EP1025332A2 Multi-well computerized control of fluid pumping |
| 08/09/2000 | CN2391029Y Stong spring sandproof clamp oil well pump |
| 08/09/2000 | CN2391028Y Meander ridge pumping well |
| 08/09/2000 | CN2391010Y 气汽发生器 Gas steam generator |
| 08/09/2000 | CN2391009Y Small borehole bridge type hollow injection well down-hole flow |
| 08/09/2000 | CN2391008Y Sandproof pipe with pump |
| 08/09/2000 | CN1055332C Pull tube gas injection point retreading type coal seam gasifying method |
| 08/09/2000 | CN1055331C Perforation and sand-proof treatment device for oil well |
| 08/09/2000 | CN1055330C Perforation and fracturing device for oil well |
| 08/08/2000 | US6100616 Electric submergible motor protector |
| 08/08/2000 | US6100385 Preparation of cellulose derivative; exposing cellulose derivative to reducing agent, heat treating, exposing to pressure and metal catalyst, recover adjusted cellulose derivative |
| 08/08/2000 | US6099274 Pump to surface pump |
| 08/08/2000 | US6098717 Method and apparatus for hanging tubulars in wells |
| 08/08/2000 | US6098716 Releasable connector assembly for a perforating gun and method |
| 08/08/2000 | US6098713 Methods of completing wells utilizing wellbore equipment positioning apparatus |
| 08/08/2000 | US6098710 Method and apparatus for cementing a well |
| 08/08/2000 | US6098707 Perforation gun for well casing |
| 08/08/2000 | CA2213552C Improved polished rod for oil well pumping |
| 08/08/2000 | CA2176639C Oilfield in-situ combustion process |
| 08/03/2000 | WO2000045031A1 Controlling production |
| 08/03/2000 | WO2000045024A2 Securing a well casing to a wellbore |
| 08/02/2000 | EP1023521A1 Device for fitting an oil pipe stiffening sleeve on a support structure |
| 08/02/2000 | EP1023382A1 Composite proppant, composite filtration media and methods for making and using same |
| 08/02/2000 | EP0683846B1 A system for use in offshore petroleum production |
| 08/02/2000 | CN2390007Y Chemical feeder for natural gas wellhead |
| 08/02/2000 | CN2390006Y Chemical feeder for wellhead |
| 08/02/2000 | CN1261642A Increasing well yield by sound energy |
| 08/02/2000 | CN1055147C Oil well pore path crack cleaning equipment and treating method |
| 08/01/2000 | US6096121 Seal joint for multiple internal separator arrangement |
| 08/01/2000 | US6095258 Pressure actuated safety switch for oil well perforating |
| 08/01/2000 | US6095248 Method and apparatus for remote control of a tubing exit sleeve |
| 08/01/2000 | US6095247 Apparatus and method for opening perforations in a well casing |
| 08/01/2000 | US6095245 Well perforating and packing apparatus and method |
| 08/01/2000 | US6095244 Methods of stimulating and producing multiple stratified reservoirs |
| 08/01/2000 | US6095241 Coupling device for a drive assembly |
| 08/01/2000 | CA2195118C Blowout preventer protector and method of using same during high pressure oil and gas well stimulation |
| 07/29/2000 | CA2297595A1 Flexible swage |
| 07/29/2000 | CA2295364A1 Method of extracting hydrocarbons from underground geological formations |
| 07/27/2000 | WO2000043633A1 Completion method for one perforated interval per fracture stage during multi-stage fracturing |
| 07/27/2000 | WO2000004271A9 Hydraulic equipment for expanding tubular elements in wells |
| 07/26/2000 | EP1022429A1 Multi purpose riser |
| 07/26/2000 | EP1021231A1 Improved helical separator |
| 07/26/2000 | EP0929732A4 High density perforating gun system |
| 07/25/2000 | US6092604 Sand control screen assembly having a sacrificial anode |
| 07/25/2000 | US6092603 Method and equipment for the flow of offshore oil production with primary gas separation |
| 07/25/2000 | US6092600 Dual injection and lifting system using a rod driven progressive cavity pump and an electrical submersible pump and associate a method |
| 07/25/2000 | US6092599 Downhole oil and water separation system and method |
| 07/25/2000 | US6092598 Method and apparatus for measuring operating parameters of a submergible pumping system |
| 07/25/2000 | US6092595 Deep drilling and/or well pump system using a hydrodynamic retarder to compensate for restoring torques released in the system |
| 07/25/2000 | US6092594 Device for making or regenerating a water well |
| 07/20/2000 | WO2000042289A1 Method and apparatus for coupling explosive devices |
| 07/20/2000 | WO2000042288A1 Method and apparatus for forcing an object through the sidewall of a borehole |
| 07/20/2000 | WO2000003600A3 Improved tubing handling for subsea oilfield tubing operations |
| 07/19/2000 | CN2388347Y Production tree |
| 07/19/2000 | CN1260441A Reduction of heavy-oil viscosity and extraction of heavy-oil |
| 07/18/2000 | US6089832 Through-tubing, retrievable downhole pump system |
| 07/18/2000 | US6089322 Method and apparatus for increasing fluid recovery from a subterranean formation |
| 07/18/2000 | US6089320 Apparatus and method for lateral wellbore completion |
| 07/18/2000 | US6089317 Cyclonic separator assembly and method |
| 07/18/2000 | US6089316 Wire-wrapped well screen |
| 07/18/2000 | CA2209654C Electrical connections to encased electronic devices |
| 07/18/2000 | CA2193519C Downhole swivel |
| 07/18/2000 | CA2081973C Multiplexed electrohydraulic type of control system for use in undersea production system |
| 07/13/2000 | WO2000040835A1 Method for removing condensables from a natural gas stream |
| 07/13/2000 | WO2000040834A1 Method for removing condensables from a natural gas stream, at a wellhead, downstream of the wellhead choke |
| 07/13/2000 | WO2000040338A1 A nozzle for supersonic gas flow and an inertia separator |
| 07/13/2000 | WO2000020820A3 Detonators for use with explosive devices |
| 07/13/2000 | DE19958399A1 Brunnenbohrungsverschalung Wellbore casing |
| 07/12/2000 | EP1018593A1 Multi-valve fluid flow control system and method |
| 07/12/2000 | EP0842348B1 Inflatable tubular sleeve for tubing or obturating a well or a pipe |
| 07/12/2000 | CN2387283Y Dischargeable oil-well pump |
| 07/12/2000 | CN2387265Y Wellhead pressure sensing device for oil-water well |
| 07/12/2000 | CN2387264Y Water power cutting off tool |
| 07/12/2000 | CN2387263Y Expansion sand-proof screening tube |
| 07/12/2000 | CN2387259Y Oil field heat extracting packer |
| 07/12/2000 | CN1260025A System for drilling and completing multilateral wells |
| 07/11/2000 | US6086739 In situ technology for soil cleanup; purification |
| 07/11/2000 | US6085843 Mechanical shut-off valve |
| 07/11/2000 | US6085842 Method of treating an underground formation |
| 07/11/2000 | US6085838 Method and apparatus for cementing a well |
| 07/11/2000 | US6085837 Downhole fluid disposal tool and method |
| 07/06/2000 | WO2000039432A1 Apparatus for completing a subterranean well and method of using same |
| 07/06/2000 | WO2000039428A2 Artificial aquifers in hydrologic cells for oil recovery |
| 07/06/2000 | WO2000039031A1 Advanced treatment for produced water |
| 07/06/2000 | WO2000038977A1 Working ship |
| 07/06/2000 | WO1999065573A8 A method for remediating a medium |
| 07/05/2000 | EP1015729A1 Connection of tubulars using a top drive |