| Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780) |
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| 08/24/2006 | WO2006088372A1 System and method for well intervention |
| 08/24/2006 | US20060185907 Device for transporting particles of a magnetic material and tool comprising such a device |
| 08/24/2006 | US20060185906 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 08/24/2006 | CA2597713A1 Conserving components of fluids |
| 08/23/2006 | EP1414753B9 Method for regeneration of used halide fluids |
| 08/23/2006 | CN1271310C Drilling fluid density determining method and controlling plant |
| 08/22/2006 | US7094736 Sampling of hydrocarbons from geological formations |
| 08/22/2006 | US7093678 Method and apparatus for removing fluids from drill cuttings |
| 08/22/2006 | US7093674 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 08/22/2006 | US7093671 Pneumatic rock-boring device and method for starting such a device |
| 08/22/2006 | US7093662 System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud |
| 08/22/2006 | CA2438359C Downhole packer |
| 08/17/2006 | WO2002033215A8 Dual valve well control in underbalanced wells |
| 08/17/2006 | US20060180754 Method and apparatus for detecting while drilling underbalanced the presence and depth of water produced from the formation |
| 08/17/2006 | US20060180353 Concentrating oil well fluid by passing oil well fluid through a cavitation device, adding at least one moiety of at least one component of concentrated oil well fluid to increase the concentration thereof in concentrated oil well fluid, and reusing the concentrated oil well fluid |
| 08/17/2006 | US20060180350 Impact excavation system and method with particle trap |
| 08/17/2006 | US20060180312 Displacement annular swivel |
| 08/16/2006 | EP1689969A1 Downhole tool |
| 08/16/2006 | EP1689968A1 Downhole tool |
| 08/16/2006 | EP1689966A1 Nozzle unit and method for excavating a hole in an object |
| 08/15/2006 | US7090039 Assembly for drilling low pressure formation |
| 08/15/2006 | US7090036 System for drilling oil and gas wells by varying the density of drilling fluids to achieve near-balanced, underbalanced, or overbalanced drilling conditions |
| 08/15/2006 | US7090033 Drill string shutoff valve |
| 08/15/2006 | US7090023 Apparatus and methods for drilling with casing |
| 08/15/2006 | US7090018 Reverse circulation clean out system for low pressure gas wells |
| 08/15/2006 | US7090004 Cement float |
| 08/15/2006 | CA2268444C Apparatus and method for drilling boreholes |
| 08/10/2006 | WO2005108735A3 Systems and methods for remotely determining and changing cutting modes during decoking |
| 08/10/2006 | US20060175090 Drilling system and method |
| 08/09/2006 | EP1687505A1 Fluid jet drilling tool |
| 08/09/2006 | EP1488073B1 Dynamic annular pressure control apparatus and method |
| 08/09/2006 | CN1814986A Method for overcomming creep of salt-rock layer by using ralation of drilling fluid density and chloride concentration |
| 08/08/2006 | US7087555 Suspension of graphite particles ; controlling particle sizes |
| 08/08/2006 | US7086481 Wellbore isolation apparatus, and method for tripping pipe during underbalanced drilling |
| 08/08/2006 | US7086469 Increasing reaction efficiency of acetic acid |
| 08/08/2006 | US7086463 Methods of downhole testing subterranean formations and associated apparatus therefor |
| 08/03/2006 | WO2005118741A3 Surge device for air drilling |
| 08/03/2006 | WO2005065364A3 Instrumented internal blowout preventer valve for measuring drill string drilling parameters |
| 08/03/2006 | US20060169491 Method and arrangement for performing drilling operations |
| 08/02/2006 | CN2802456Y Undeground electromagnetic flow sensor |
| 08/02/2006 | CN2802080Y Multipurpose liquid-mixing device for hollow rod oil production |
| 08/02/2006 | CN2802065Y Mud pumping device |
| 08/01/2006 | CA2294010C Casing annulus remediation system |
| 07/27/2006 | WO2005124101A3 Method and system for producing gas and liquid in a subterranean well |
| 07/26/2006 | EP1682744A2 System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud |
| 07/26/2006 | CN2799841Y Well cleaning monitor of oil well |
| 07/26/2006 | CN2799840Y Well cleaning device used in oil field |
| 07/25/2006 | US7081438 drilling through tar sand using an aqueous drilling fluid containing a phosphonate or a phosphate ester of an alkanolamine as an antisticking agent; improved friction resistance |
| 07/25/2006 | US7080960 Apparatus and method for transporting waste materials |
| 07/20/2006 | WO2006076666A1 System and method for enhancing permeability of a subterranean zone at a horizontal well bore |
| 07/20/2006 | US20060157282 Managed pressure drilling |
| 07/20/2006 | US20060157281 Bi-directional rotary steerable system actuator assembly and method |
| 07/20/2006 | US20060157249 Finger boot basket |
| 07/20/2006 | US20060157241 System for injecting water, collected from subterranean aquifers and injector wells, into oil reservoirs |
| 07/19/2006 | EP1595057B1 Dynamic annular pressure control apparatus and method |
| 07/19/2006 | EP1488072B1 A method for applying an anti-corrosion coating to especially corrosion exposed parts in rock drill equipment |
| 07/19/2006 | CN1804361A Earthquake dry well drill |
| 07/18/2006 | US7077219 Foamed treatment fluids and associated methods |
| 07/18/2006 | CA2365310C Wellbore primary barrier and related systems |
| 07/13/2006 | WO2004089608A3 Apparatus for radially expanding and plastically deforming a tubular member |
| 07/13/2006 | US20060151174 Flow control device |
| 07/12/2006 | EP1019614B1 Casing filling and circulating apparatus |
| 07/12/2006 | CN1802553A X射线监控 X-ray monitor |
| 07/11/2006 | US7073612 Surge device for air drilling |
| 07/11/2006 | US7073595 Method and system for controlling pressure in a dual well system |
| 07/11/2006 | US7073579 Methods of downhole testing subterranean formations and associated apparatus therefor |
| 07/11/2006 | CA2290043C Drilling fluid flow monitoring system |
| 07/11/2006 | CA2252944C Closed loop fluid-handling system for use during drilling of wellbores |
| 07/07/2006 | CA2491931A1 Drill pipe float valve |
| 07/06/2006 | US20060144594 Silicate-containing additives for well bore treatments and associated methods |
| 07/06/2006 | CA2784248A1 Thermoset nanocomposite particles, processing for their production, and their use in oil and natural gas drilling applications |
| 07/05/2006 | EP1676975A2 Subsea riser disconnect and method |
| 07/05/2006 | EP1676066A2 Internal blow out preventer ball and seat |
| 07/05/2006 | EP1368552B1 Downhole tool |
| 07/05/2006 | CN2793303Y Flexible-piping cavity maker |
| 07/05/2006 | CN1796948A Continuous method for testing stratified flux under well and instrument |
| 07/04/2006 | US7069995 Remedial system to flush contaminants from tubing string |
| 07/04/2006 | US7069992 Mono-trip cement thru completion |
| 07/04/2006 | US7069991 Method and apparatus for surge pressure reduction in a tool with fluid motivator |
| 07/04/2006 | CA2240693C Screen for vibrating separator |
| 06/29/2006 | WO2006069088A1 Method and system for cleaning a well bore |
| 06/29/2006 | WO2006029019A3 Method of removing an invert emulsion filter cake after the drilling process using a single phase microemulsion |
| 06/29/2006 | US20060137878 Drilling fluid additive and method |
| 06/28/2006 | EP1673417A2 Solid-liquid separation of oil-based muds |
| 06/28/2006 | CN2791238Y Flesible sand-fulshing tool special for horizontal well and oblique well for producing petroleum |
| 06/27/2006 | US7066283 Reverse circulation directional and horizontal drilling using concentric coil tubing |
| 06/27/2006 | US7066279 Pneumatic ground piercing tool |
| 06/27/2006 | US7066247 Methods and apparatus for drilling with a multiphase pump |
| 06/27/2006 | CA2321417C Oil and gas well cuttings disposal system with continuous vacuum operation for sequentially filling disposal tanks |
| 06/23/2006 | CA2531462A1 Mobile catch tank and flare stack |
| 06/22/2006 | WO2005124098A3 Magnet arrangement for use on a downhole tool |
| 06/22/2006 | US20060131080 Method, system, and apparatus for controlling in-vehicle apparatus |
| 06/21/2006 | EP1671769A1 Coring machine with cooling fluid recovery |
| 06/21/2006 | EP1552104B1 System to reduce hydrostatic pressure in risers using buoyant spheres |
| 06/21/2006 | EP1454032B1 Method and device for injecting a fluid into a formation |
| 06/20/2006 | US7063176 Membrane forming in-situ polymerization for water based drilling fluid |
| 06/20/2006 | US7063156 Tubing fill and testing valve |
| 06/15/2006 | WO2006061556A1 Enhanced slurrification method |
| 06/15/2006 | US20060124361 Method of pumping drill cuttings and dual cylinder positive displacement pump for moving drill cuttings |
| 06/15/2006 | US20060124352 Control systems and methods for active controlled bottomhole pressure systems |