| Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780) |
|---|
| 04/28/2011 | WO2011001139A3 Improved methods and systems for integrated material processing |
| 04/28/2011 | WO2010069992A9 Riser valve |
| 04/28/2011 | US20110094736 Device for extracting at least one type of gas contained in a drilling mud, an analysis arrangement and a related extraction method |
| 04/28/2011 | DE102009050177A1 Vorrichtung zum Mischen eines pulverförmigen Mediums mit einer Flüssigkeit An apparatus for mixing a powdery medium with a liquid |
| 04/28/2011 | DE102009050176A1 Vorrichtung zum Mischen eines pulverförmigen Mediums mit einer Flüssigkeit An apparatus for mixing a powdery medium with a liquid |
| 04/27/2011 | EP2313603A1 Ecologically sensitive mud-gas containment system |
| 04/27/2011 | EP2313602A1 Arrangement and method comprising a flushing head for a rock drilling machine, and rock drilling machine comprising the arrangement |
| 04/27/2011 | CN201810240U Quick breaking-down well cleanup device by high-temperature gas jet flow |
| 04/27/2011 | CN201810239U High-pressure swirl sand washer |
| 04/27/2011 | CN201810238U Well-flushing circulating water sedimentation separation filter vehicle for oil-water well |
| 04/27/2011 | CN201810237U Workover fluid underground positive and negative circulation conversion device |
| 04/27/2011 | CN102037207A Grip head for an earth boring unit |
| 04/27/2011 | CN102031945A Oil- water well blockage removal method and oil-water well blockage removal system |
| 04/27/2011 | CN102031935A Extendable combined drill rod with water passage, air passage and slurry returning passage |
| 04/27/2011 | CN102031934A Drill rod water feeder |
| 04/26/2011 | US7932834 Data relay system for instrument and controller attached to a drill string |
| 04/26/2011 | CA2643743C Method and apparatus for centralized proppant storage and metering |
| 04/26/2011 | CA2552055C System for heating a skid-mounted tank |
| 04/26/2011 | CA2475359C Methods of discovering and correcting subterranean formation integrity problems during drilling |
| 04/26/2011 | CA2469352C A screen assembly for a vibratory separator |
| 04/21/2011 | WO2011046669A1 Hydrocarbon recovery operations fluids and methods for using the same |
| 04/21/2011 | US20110092398 Viscoelastic surfactant fluids and related methods of use |
| 04/21/2011 | US20110088949 Methods and Apparatus for Characterization of Petroleum Fluids Contaminated with Drilling Mud |
| 04/21/2011 | CA2774183A1 Hydrocarbon recovery operations fluids and methods for using the same |
| 04/20/2011 | EP2310620A2 An arrangement and a method for monitoring an air flow in a drill rig |
| 04/20/2011 | EP2310619A2 Cuttings transfer system |
| 04/20/2011 | EP2310618A1 Separation of drill cuttings from drilling fluid on a seabed |
| 04/20/2011 | EP2126276B1 A valve |
| 04/20/2011 | EP1093540B1 Method and multi-purpose apparatus for control of fluid in wellbore casing |
| 04/20/2011 | CN201802595U Drilling pump |
| 04/20/2011 | CN201802331U Screw pump well washing device |
| 04/20/2011 | CN201802330U Uninterrupted circular drilling device |
| 04/20/2011 | CN102027188A An arrangement and a method for monitoring an air flow in a drill rig |
| 04/20/2011 | CN102022094A Ceaseless drilling mud circulation device and method |
| 04/20/2011 | CN102022091A Submersible water faucet |
| 04/20/2011 | CN102022082A A ground instruction transmission method for controlling rotary steering drilling tool and an apparatus for the same |
| 04/19/2011 | US7927042 Elongate element tensioning member |
| 04/19/2011 | US7926592 Steerable drilling system |
| 04/19/2011 | US7926588 Optimizing drilling performance using a selected drilling fluid |
| 04/19/2011 | CA2501691C Multi-cycle downhole apparatus |
| 04/19/2011 | CA2497463C Ball operated by-pass tool for use in drillstring |
| 04/14/2011 | WO2011044260A2 Method for hydrocarbon removal and recovery from drill cuttings |
| 04/14/2011 | WO2011044227A2 Apparatuses and methods of manufacturing oilfield machines |
| 04/14/2011 | WO2011044211A2 Method and apparatus for drilling a probabilistic approach |
| 04/14/2011 | WO2011043785A1 Drilling machine power pack which includes a clutch |
| 04/14/2011 | WO2011043781A1 Drilling machine power pack which includes a clutch |
| 04/14/2011 | WO2011043768A1 Combination injection string and distributed sensing string |
| 04/14/2011 | WO2011007120A3 Methods for contacting a surface with a fluid containing a marker to determine the wettability of the surface |
| 04/14/2011 | WO2011002682A3 Remotely controllable manifold |
| 04/14/2011 | WO2009055367A3 Boat installation frame for transportation tanks |
| 04/14/2011 | US20110084004 Independent deck adjustment |
| 04/14/2011 | US20110083904 Short mud saver for use with top drive or kelly |
| 04/14/2011 | US20110083902 Lost Circulation Control Fluids for Naturally Fractured Carbonate Formations |
| 04/14/2011 | CA2776862A1 Apparatuses and methods of manufacturing oilfield machines |
| 04/14/2011 | CA2776858A1 Method and apparatus for drilling a probabilistic approach |
| 04/14/2011 | CA2776627A1 Method for hydrocarbon removal and recovery from drill cuttings |
| 04/13/2011 | EP2307662A1 Mixing apparatus and method of using same |
| 04/13/2011 | CN201794538U Engineering driller water faucet |
| 04/13/2011 | CN201794537U Drill pipe low-pressure water faucet |
| 04/13/2011 | CN201794536U Wash pipe assembly of top drive drilling equipment |
| 04/13/2011 | CN1656319B Methods and apparatus for unloading a screw compressor |
| 04/13/2011 | CN102015128A Vibratory separator motion |
| 04/12/2011 | CA2684399C An integrated device for the treatment of drill cuttings |
| 04/12/2011 | CA2641397C Selectively activated float equipment |
| 04/12/2011 | CA2438826C Two stage downhole drilling fluid filter |
| 04/07/2011 | WO2011039587A2 Riser termination |
| 04/07/2011 | WO2011038861A2 Method and composition to prevent fluid mixing in pipe |
| 04/07/2011 | US20110079439 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 04/07/2011 | CA2775477A1 Method and composition to prevent fluid mixing in pipe |
| 04/06/2011 | EP2305767A1 Method and compositon to prevent fluid mixing in pipe |
| 04/06/2011 | EP2304168A2 Fill up and circulation tool and mudsaver valve |
| 04/06/2011 | EP2304159A2 Signal operated tools for milling, drilling, and/or fishing operations |
| 04/06/2011 | CN201786298U Well flushing valve capable of realizing sand settling |
| 04/06/2011 | CN201786297U Sand-sinking well flushing valve core |
| 04/06/2011 | CN201786296U Manifold remote control anti-theft device |
| 04/06/2011 | CN201786295U Pressure regulating well washing machine |
| 04/06/2011 | CN201786294U Oilfield self-circulation well flushing truck |
| 04/06/2011 | CN102007265A Pressure control system |
| 04/06/2011 | CN102007264A Method and apparatus for programmable pressure drilling and programmable gradient drilling, and completion |
| 04/06/2011 | CN102003140A Traversing reverse circulating drilling method of horizontal directional drilling pipeline and special drilling bit |
| 04/05/2011 | US7918273 Top drive casing system |
| 04/05/2011 | CA2632182C Apparatus for autofill deactivation of float equipment and method of reverse cementing |
| 04/05/2011 | CA2512641C Apparatus and methods for drilling a wellbore using casing |
| 03/31/2011 | WO2011038304A1 Drill cuttings methods and systems |
| 03/31/2011 | WO2011036556A2 Multiple process service vessel |
| 03/31/2011 | WO2011036144A1 Control method and apparatus for well operations |
| 03/31/2011 | WO2011002615A3 Flow control device with one or more retrievable elements |
| 03/31/2011 | WO2010144699A3 Delay activated valve and method |
| 03/31/2011 | WO2010144593A3 Dual acting rod piston control system |
| 03/31/2011 | US20110073374 Flow Pulsing Device for a Drilling Motor |
| 03/31/2011 | CA2847647A1 Cement compositions and methods utilizing nano-clay |
| 03/31/2011 | CA2810785A1 Drill cuttings methods and systems |
| 03/31/2011 | CA2774803A1 Control method and apparatus for well operations |
| 03/30/2011 | EP2300681A2 System and method for improving operational characteristics of devices used in a well |
| 03/30/2011 | EP2156008B1 Sealing device and method for sealing a casing |
| 03/30/2011 | CN201778801U Combined multi-level pressure control device |
| 03/30/2011 | CN201778705U Pressure control drilling throttle device with two-stage throttling function |
| 03/30/2011 | CN201778704U Rotary type mud vibrating screen |
| 03/30/2011 | CN201778703U Double-layer drilling fluid vibrating screen |
| 03/30/2011 | CN201778702U Novel flushing and accompanying device of oil well |