| 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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| 01/12/2010 | US7645723 Ecological compatibility, stability, performance; invert emulsion base, thinners, emulsifiers and weighting agents; deep water wells; free of organophilic clays |
| 01/12/2010 | US7645096 Yielding rock bolt |
| 01/12/2010 | US7644768 Separation device for material from a drilling rig situated on the seabed |
| 01/12/2010 | US7644766 Flushing device and method of flushing an annular space |
| 01/12/2010 | US7644756 Oil recovery by injection of steam, carbon dioxide and nitrogen |
| 01/12/2010 | US7644523 Mobile vacuum boring and excavation method |
| 01/12/2010 | CA2492920C Fast valve actuator and tool provided with same |
| 01/12/2010 | CA2335266C Solids-free viscous fluids |
| 01/07/2010 | WO2010002360A1 Ecologically sensitive mud-gas containment system |
| 01/07/2010 | WO2010000055A1 Method and apparatus for on-site drilling cuttings analysis |
| 01/07/2010 | US20100000797 Drilling tool |
| 01/07/2010 | US20100000796 Earth Drilling Device |
| 01/07/2010 | US20100000795 Enhanced oil-based foam drilling fluid compositions and method for making and using same |
| 01/07/2010 | CA2729154A1 Ecologically sensitive mud-gas containment system |
| 01/06/2010 | EP2139968A2 Treatment for recycling fracture water - gas and oil recovery in shale deposits |
| 01/06/2010 | EP2139592A2 Blending fracturing geltechnical field |
| 01/06/2010 | CN201377298Y Equal diameter washing pipe |
| 01/05/2010 | US7642474 Device for the quantitative analysis of debris |
| 01/05/2010 | US7640984 Method for drilling and casing a wellbore with a pump down cement float |
| 01/05/2010 | CA2451263C Methods and apparatus for applying torque and rotation to connections |
| 01/02/2010 | CA2670893A1 Enhanced oil-based foam drilling fluid compositions and method for making and using same |
| 12/31/2009 | US20090321141 Methods and Apparatus for Wireline Drilling On Coiled Tubing |
| 12/30/2009 | EP2137374A1 An integrated device for the treatment of drill cuttings |
| 12/30/2009 | EP2137373A1 Drilling tool |
| 12/30/2009 | EP2137280A1 Method for treating a fractured formation |
| 12/30/2009 | CN201374013Y Automatic brine concentration regulator |
| 12/30/2009 | CN201372750Y Side door shaft type sand-cleaning door |
| 12/30/2009 | CN201372749Y Continuously-reinforced composite pipe for oil field well flushing |
| 12/30/2009 | CN201372748Y Slurry pump assembly using planetary speed reduction box as clutch transmission |
| 12/30/2009 | CA2728166A1 Copolymer for shale stabilization and method of use |
| 12/30/2009 | CA2638405A1 Method and apparatus for on-site drilling cuttings analysis |
| 12/29/2009 | US7638465 Kinetic gas hydrate inhibitors in completion fluids |
| 12/29/2009 | CA2454388C Injecting a fluid into a borehole ahead of the bit |
| 12/29/2009 | CA2170569C Improved water-based drilling fluids for reduction of water adsorption and hydration of argillaceous rocks |
| 12/24/2009 | US20090314544 Well Drilling and Production Using a Surface Blowout Preventer |
| 12/23/2009 | WO2009154468A1 Mixing apparatus and method of using same |
| 12/23/2009 | EP2134442A1 Method and apparatus for electrophoretic separation of solids and water from oil based mud |
| 12/23/2009 | CN100572748C Method and system for circulating fluid in a well system |
| 12/23/2009 | CA2727703A1 Mixing apparatus and method of using same |
| 12/22/2009 | US7635026 Methods and devices for forming a wellbore with casing |
| 12/22/2009 | CA2465530C Automated pipe joining system |
| 12/22/2009 | CA2300888C Oil based drilling fluids suitable for drilling in the presence of acidic gases |
| 12/17/2009 | US20090308660 Auxiliary equipment for use with drilling apparatus |
| 12/17/2009 | US20090308595 Well cleaning apparatus |
| 12/16/2009 | EP2132279A1 Drilling fluid and method for drilling in coal-containing formations |
| 12/16/2009 | CN201363112Y Well cleaning and inflating integrated device used for screen tube sublevel well completion |
| 12/16/2009 | CN100569889C Under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes |
| 12/16/2009 | CN100569228C Fatty acid analogues for treatment of cancer |
| 12/15/2009 | US7632786 Methods and fluid compositions for depositing and removing filter cake in a well bore |
| 12/15/2009 | US7632785 Method for simultaneous removal of asphaltene, and/or paraffin and scale from producing oil wells |
| 12/15/2009 | CA2567890C Erosion resistant aperture for a downhole valve or ported flow control tool |
| 12/10/2009 | WO2009148375A1 Arrangement and method comprising a flushing head for a rock drilling machine, and rock drilling machine comprising the arrangement |
| 12/10/2009 | WO2009148327A1 Separation of drill cuttings from drilling fluid on a seabed |
| 12/10/2009 | WO2009102703A3 Self adjusting debris excluder sub |
| 12/10/2009 | US20090301780 Compartmentalized mwd tool with isolated pressure compensator |
| 12/10/2009 | US20090301734 Downhole Application for a Backpressure Valve |
| 12/10/2009 | US20090301713 Backpressure Valve for Wireless Communication |
| 12/10/2009 | CA2726445A1 Separation of drill cuttings from drilling fluid on a seabed |
| 12/10/2009 | CA2724381A1 Arrangement and method comprising a flushing head for a rock drilling machine, and rock drilling machine comprising the arrangement |
| 12/09/2009 | EP2129859A1 Distance holder with helical slot |
| 12/09/2009 | CN201358778Y Under-balanced drilling automatic pressure compensation system |
| 12/09/2009 | CN201357143Y Vibrating screen dampening device |
| 12/09/2009 | CN101600851A Drilling components and systems to dynamically control drilling dysfunctions and methods of drilling a well with same |
| 12/09/2009 | CN101600849A High density slurry |
| 12/09/2009 | CN101600848A Drilling tool |
| 12/08/2009 | US7628213 Multi-cycle downhole tool with hydraulic damping |
| 12/08/2009 | CA2377504C Water based wellbore fluids |
| 12/06/2009 | CA2668419A1 Method for mitigating the salinity of drilling waste |
| 12/03/2009 | WO2009111735A3 Shaker deck adjustment apparatus |
| 12/03/2009 | WO2009111730A3 Fluid distribution system |
| 12/03/2009 | WO2009102735A3 Downhole washout detection system and method |
| 12/03/2009 | WO2009098473A3 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 12/02/2009 | EP2128376A2 Flow restrictor coupling |
| 12/02/2009 | EP2126279A1 Wellbore monitor |
| 12/02/2009 | EP2126276A1 A valve |
| 12/02/2009 | EP2126275A1 Method and apparatus for controlling the manufacture of well treatment fluid |
| 12/02/2009 | EP2126274A2 Use of cuttings tank for slurrification on drilling rig |
| 12/02/2009 | EP2126271A1 Improved shoe for wellbore lining tubing |
| 12/02/2009 | EP2125139A2 Use of cuttings tanks for recycling oil based mud and water |
| 12/02/2009 | EP1383983B1 Method of recycling water contaminated oil based drilling fluid |
| 12/02/2009 | CN201354610Y Concentric tube jet sand cleaning device |
| 12/02/2009 | CN101595272A Microtunnelling system and apparatus |
| 12/01/2009 | CA2480070C Method and application for open hole gravel packing |
| 11/26/2009 | WO2009142836A2 System and method for improving operational characteristics of devices used in a well |
| 11/26/2009 | WO2009098478A3 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 11/26/2009 | CA2632634A1 Adjustable angle drive connection for a down hole drilling motor |
| 11/25/2009 | CN101586453A Rapid installation device and usage method for vibrating screen sieve |
| 11/25/2009 | CN100562644C System for recovering barite and clearing useless solid phase from weighted drilling fluid |
| 11/24/2009 | US7621350 Impregnated bit with changeable hydraulic nozzles |
| 11/24/2009 | US7621349 Drill bit with a fixed cutting structure |
| 11/24/2009 | CA2460687C Module for extracting gas from underground liquid and installation equipped therewith |
| 11/19/2009 | WO2009140450A2 Cuttings transfer system |
| 11/19/2009 | WO2009109758A3 On-the-fly acid blender with sampling equipment |
| 11/19/2009 | US20090285054 Downhole Telemetry System and Method |
| 11/19/2009 | CA2723992A1 Cuttings transfer system |
| 11/19/2009 | CA2723856A1 Compositions and methods for the removal of oil-based filtercakes |
| 11/18/2009 | EP2118434A1 Apparatus for rock drilling |
| 11/18/2009 | CN201347738Y Oil pumping state converting and enhancing device |
| 11/18/2009 | CN201347732Y Non-pumping off continuous sand washing device for oil water well |
| 11/12/2009 | WO2009137724A1 Method and apparatus for efficient handling of drill cuttings |