| 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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| 10/19/2006 | US20060231255 Methods of using a polymeric precipitate to reduce the loss of fluid to a subterranean formation |
| 10/19/2006 | DE102005016884A1 Pumpensystem Pump system |
| 10/19/2006 | CA2602687A1 Apparatus and method for recovering oil-based drilling mud |
| 10/18/2006 | EP1556579B1 Automated method and system for recognizing well control events |
| 10/18/2006 | EP1339937A4 Improved method for stimulation of liquid flow in a well |
| 10/17/2006 | US7123161 Method and apparatus enhanced acoustic mud pulse telemetry |
| 10/17/2006 | US7121295 Internal blow out preventer ball and seat |
| 10/17/2006 | CA2392937C Drill bit having adjustable total flow area |
| 10/12/2006 | WO2006108122A1 Invert emulsion based completion and displacement fluid and method of use |
| 10/12/2006 | WO2006108044A1 Water based completion and displacement fluid and method of use |
| 10/12/2006 | US20060225925 Apparatus and method for recovering oil-based drilling mud |
| 10/12/2006 | US20060225924 Apparatus and method for recovering oil-based drilling mud |
| 10/12/2006 | US20060225923 Drilling assembly and method for drilling a barehole into geological formations |
| 10/12/2006 | US20060225885 Downhole apparatus |
| 10/11/2006 | EP1709291A2 Consolidation agents and the use thereof for consolidating moulded bodies and geological formations consisting of porous or particulate materials |
| 10/11/2006 | CN1278949C Method for regeneration of used halide fluids |
| 10/10/2006 | US7117940 Expander for expanding a tubular element |
| 10/05/2006 | US20060221762 Fluid mixing system |
| 10/05/2006 | US20060219441 Stabiliser, jetting and circulating tool |
| 10/04/2006 | EP1706580A1 An apparatus and process for removing liquids from drill cuttings |
| 10/04/2006 | EP1706574A1 Method and apparatus for directional drilling |
| 10/04/2006 | EP1540132B1 Fast valve actuator and tool provided with same |
| 10/04/2006 | EP1307633B1 Activating ball assembly for use with a by-pass tool in a drill string |
| 10/04/2006 | EP1297241B1 Method for drilling and casing a wellbore with a pump down cement float |
| 10/04/2006 | CN1278010C Hydraulic wet drill |
| 10/03/2006 | US7114697 Fast valve actuator and tool provided with same |
| 10/03/2006 | US7114582 Method and apparatus for removing cuttings from a deviated wellbore |
| 10/03/2006 | US7114581 Active controlled bottomhole pressure system & method |
| 10/03/2006 | US7114558 Filtered actuator port for hydraulically actuated downhole tools |
| 10/03/2006 | US7114235 Automated pipe joining system and method |
| 10/03/2006 | CA2326489C Drillstring with stabilisers for re-entering a primary wellbore |
| 09/28/2006 | WO2006076666A9 System and method for enhancing permeability of a subterranean zone at a horizontal well bore |
| 09/27/2006 | EP1704297A1 Drilling device |
| 09/27/2006 | CN1837573A High-efficiency vacuum degasifier for gas-cutting drilling liquid |
| 09/26/2006 | US7111695 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium |
| 09/26/2006 | US7111692 Apparatus and method to reduce fluid pressure in a wellbore |
| 09/26/2006 | CA2400973C Downhole surge pressure reduction and filtering apparatus |
| 09/21/2006 | WO2006099362A1 Control systems and methods for real time pressure management (ecdcontrol) |
| 09/21/2006 | WO2006098638A1 Sieve apparatus and method for use of same |
| 09/21/2006 | WO2006097710A1 Multi-function downhole tool |
| 09/21/2006 | WO2006097706A1 Downhole apparatus |
| 09/21/2006 | WO2005086565A3 Leadless sub assembly for downhole detection system |
| 09/21/2006 | US20060207798 Steerable drilling system |
| 09/21/2006 | CA2601166A1 Sieve apparatus and method for use of same |
| 09/20/2006 | EP1703074A2 Tubular filling system |
| 09/20/2006 | EP1702135A1 A method and device for controlling drilling fluid pressure |
| 09/20/2006 | EP1656492A4 Downhole hammer drill |
| 09/20/2006 | CN1836089A Drilling system and method |
| 09/19/2006 | USRE39292 Apparatus and method for downhole fluid phase separation |
| 09/19/2006 | US7108084 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 09/19/2006 | US7108081 Instrumented internal blowout preventer valve for measuring drill string drilling parameters |
| 09/19/2006 | US7108080 Method and apparatus for drilling a borehole with a borehole liner |
| 09/19/2006 | US7108071 Automatic tubing filler |
| 09/19/2006 | US7108068 Floating plate back pressure valve assembly |
| 09/19/2006 | US7108067 Method and apparatus for wellbore fluid treatment |
| 09/19/2006 | US7108066 Variable density treatment fluids and methods of using such fluids in subterranean formations |
| 09/19/2006 | US7108058 Packing assembly for rotary drilling swivels and pumps having rotating shafts |
| 09/19/2006 | US7107875 Methods and apparatus for connecting tubulars while drilling |
| 09/19/2006 | CA2189834C Method and apparatus for navigational drilling with a downhole motor employing independent drill string and bottomhole assembly rotary orientation and rotation |
| 09/14/2006 | WO2006096732A1 Method and apparatus for slurry and operation design in cuttings re-injection |
| 09/14/2006 | US20060205604 Membrane forming in-situ polymerization for water based drilling fluids |
| 09/14/2006 | US20060201715 Drilling normally to sub-normally pressured formations |
| 09/14/2006 | US20060201714 Well bore cleaning |
| 09/14/2006 | US20060201711 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 09/14/2006 | US20060201680 Method and device by a displacement tool |
| 09/13/2006 | EP1700999A2 Tubular filling system |
| 09/13/2006 | EP1700998A2 Tubular Filling System |
| 09/13/2006 | EP1700001A2 Instrumented internal blowout preventer valve for measuring drill string drilling parameters |
| 09/13/2006 | EP1700000A1 Underbalanced well drilling and production |
| 09/13/2006 | EP1699999A1 Method and system for controlling power consumption during a rock drilling process and a rock drilling apparatus therefore |
| 09/13/2006 | CN2816333Y Contamination proof well-cleanout pipe column |
| 09/13/2006 | CN1833089A Device for transporting particles of a magnetic material and tool comprising such a device |
| 09/12/2006 | CA2309516C Drill string diverter apparatus and method |
| 09/12/2006 | CA2170174C Steerable rotary drilling systems |
| 09/08/2006 | WO2006092634A1 Vibratory separator and method for separating solids from a solids laden drilling fluid |
| 09/08/2006 | CA2599838A1 Vibratory separator and method for separating solids from a solids laden drilling fluid |
| 09/07/2006 | US20060196675 Tubing Fill and Testing Valve |
| 09/06/2006 | EP1373676B1 An apparatus for retrieving metal debris from a well bore |
| 09/06/2006 | EP1356185B1 A method and drill bit for reducing the cuttings size to a predetermined maximum size |
| 09/06/2006 | CN1273561C Method of releasing stuck pipe or tools and spotting fluids therefor |
| 09/05/2006 | US7100710 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 09/05/2006 | US7100700 Downhole ball dropping apparatus |
| 09/05/2006 | CA2276522C Drill string diverter apparatus and method |
| 08/31/2006 | WO2006051168A9 Arrangement for sucking dust |
| 08/31/2006 | US20060191716 Well drilling and production using a surface blowout preventer |
| 08/31/2006 | US20060191679 Triple valve blow out preventer |
| 08/31/2006 | US20060191332 Method for measuring formation properties with a formation tester |
| 08/30/2006 | EP1694941A1 Device for removal and filtration of drilling fluid |
| 08/30/2006 | EP1377726A4 Method and apparatus for sawing or drilling concrete |
| 08/30/2006 | CN2811554Y Snubbing device in underbalanced drilling |
| 08/30/2006 | CN2811547Y Double-pipe bidirectional leather-cup leakproof sand washing string in oil production |
| 08/30/2006 | CN2811546Y Water collection and drainage device suitable for drilling wall hole |
| 08/30/2006 | CN2811545Y Anti-overflow conventional and reverse well-flushing device of pipe string |
| 08/30/2006 | CN2811535Y Center water-injection type air-operated coal borer |
| 08/30/2006 | CN1826454A Downhole hammer drill |
| 08/29/2006 | US7096982 Drill shoe |
| 08/29/2006 | US7096976 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 08/29/2006 | US7096975 Modular design for downhole ECD-management devices and related methods |
| 08/29/2006 | US7096948 Method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing |
| 08/24/2006 | WO2006088826A2 Conserving components of fluids |