| 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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| 02/15/2006 | CN1734053A Down-hole sand control apparatus |
| 02/15/2006 | CN1242155C Abrasive jet well drilling tool assembly |
| 02/14/2006 | US6997599 Waste mud agitation system |
| 02/14/2006 | US6997272 Method and apparatus for increasing drilling capacity and removing cuttings when drilling with coiled tubing |
| 02/14/2006 | US6997270 Compounds and method for generating a highly efficient membrane in water-based drilling fluids |
| 02/14/2006 | CA2136375C A method and apparatus for retrofitting drilling rigs with a catch pan |
| 02/09/2006 | WO2006015277A1 Downhole inflow control device with shut-off feature |
| 02/08/2006 | EP1623088A1 Method to recover brine from drilling fluids |
| 02/08/2006 | EP1622991A1 Well-treating method to prevent or cure lost-circulation |
| 02/08/2006 | CN2756817Y Inflation drilling gas-liquid mixing controller |
| 02/08/2006 | CN2756816Y Sand-proof pipe external gravel filling sand-proof well-washing compensator |
| 02/08/2006 | CN1730895A Automatic boring device for hand-held drill |
| 02/08/2006 | CN1240929C Mud level displaying alarm and well mud level monitoring method |
| 02/07/2006 | US6994174 Washpipe assembly |
| 02/07/2006 | US6994173 Method of drilling a borehole |
| 02/07/2006 | CA2425783C Zero drill completion and production system |
| 02/07/2006 | CA2225124C Drill tube |
| 02/06/2006 | CA2513926A1 A tool for fluid filling and circulation during oilfield well tubing |
| 02/02/2006 | WO2006012164A1 Controlled variable density fluid for wellbore operations |
| 02/02/2006 | WO2006010877A1 System and method for drilling wellbores |
| 02/02/2006 | WO2006010874A1 System and method for remediating pipeline blockage |
| 02/02/2006 | US20060021755 Underbalanced marine drilling riser |
| 02/02/2006 | US20060021754 Method for operating a well jet device during cleaning of the downhole area of a formation and device for carrying out said method |
| 02/02/2006 | CA2572779A1 System and method for drilling wellbores |
| 02/01/2006 | EP1621724A2 Methods of downhole testing subterranean formations and associated apparatus therefor |
| 02/01/2006 | EP1034355B1 Tool cooling system |
| 02/01/2006 | CN2755267Y Automatic sand washing tubular column |
| 02/01/2006 | CN1239670C Method for fracturing rock-layer underground |
| 01/31/2006 | CA2425724C Tubing fill and testing valve |
| 01/31/2006 | CA2416560C Non-cryogenic production of nitrogen for on-site injection in well clean out |
| 01/31/2006 | CA2295592C Bypass valve closing means |
| 01/26/2006 | WO2005098192A3 Improvements in or relating to rock drilling equipment |
| 01/26/2006 | US20060016688 Electrical treatment for oil based drilling or completion fluids |
| 01/26/2006 | US20060016592 Kick warning system using high frequency fluid mode in a borehole |
| 01/25/2006 | EP1619350A1 A plug for use in wellbore operations, an apparatus for receiving said plug, a plug landing system and a method for cementing tubulars in a wellbore |
| 01/25/2006 | CN1238649C Fluid flow control system |
| 01/25/2006 | CN1238463C Fluid and techniques for hydrocarbon well completion |
| 01/24/2006 | US6989355 under-neutralized composition provides a lower interfacial tension compared to the 100 percent neutralized alkylxylene sulfonic acid; method optionally employs suitable co-surfactants, such as alcohols, alcohol ethers, polyalkylene glycols |
| 01/24/2006 | US6988568 Simultaneously operation to fill, store and dispense its contents; separate the liquid and solid particles; continuous process without stoping; separator is chosen from screen, filter, vibrator, hydrocyclone, centrifuges |
| 01/24/2006 | US6988567 Drilled cuttings movement systems and methods |
| 01/24/2006 | CA2240895C Water separator for a down hole drill |
| 01/22/2006 | CA2476933A1 Drilling fluid conditioning tank and centrifuge combination |
| 01/21/2006 | CA2671526A1 Controlling transient pressure conditions in a wellbore |
| 01/21/2006 | CA2671521A1 Controlling transient pressure conditions in a wellbore |
| 01/19/2006 | US20060014649 Under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes |
| 01/19/2006 | US20060013656 Full-displacement pressure grouted pile system and method |
| 01/19/2006 | US20060011520 Dam basket for vibratory separators |
| 01/19/2006 | US20060011389 Downhole tool |
| 01/19/2006 | US20060011354 Surge reduction bypass valve |
| 01/19/2006 | US20060011353 Apparatus and methods for facilitating the connection of tubulars using a top drive |
| 01/19/2006 | CA2570263A1 Variable density drilling mud |
| 01/18/2006 | EP1423582B1 Assembly for drilling low pressure formation |
| 01/18/2006 | EP0948700B1 Whipstock |
| 01/18/2006 | CN2752424Y Oil layer protecting energy conservation well-flushing device |
| 01/18/2006 | CN1237254C Mud circulation system |
| 01/17/2006 | US6987463 Method for collecting geological data from a well bore using casing mounted sensors |
| 01/17/2006 | US6986396 Method for determining sweep efficiency for removing cuttings from a borehole |
| 01/17/2006 | US6986282 Method and apparatus for determining downhole pressures during a drilling operation |
| 01/12/2006 | WO2006003400A1 Apparatus and method of treating contaminated waste |
| 01/12/2006 | US20060006004 Method for extracting coal bed methane with source fluid injection |
| 01/12/2006 | US20060005999 Methods and apparatus for drilling with a multiphase pump |
| 01/12/2006 | US20060005972 Method and system for production of gas and water from a coal seam using well bores with multiple branches during drilling and after drilling completion |
| 01/11/2006 | EP1613834A2 Vibratory screening machine for earth drilling installation |
| 01/11/2006 | EP1012443B1 Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 01/11/2006 | CN1720386A Method and system for circulating fluid in a well system |
| 01/10/2006 | US6984610 Acid based micro-emulsions of surfactants and solvents |
| 01/10/2006 | US6983803 Equalizer valve and associated method for sealing a fluid flow |
| 01/10/2006 | US6983798 Methods and fluid compositions for depositing and removing filter cake in a well bore |
| 01/10/2006 | US6983704 Offshore cargo rack for use in transferring palletized loads between a marine vessel and an offshore platform |
| 01/10/2006 | CA2278933C Tool and method for drilling a lateral well |
| 01/05/2006 | US20060000993 Cement flow control tool |
| 01/05/2006 | US20060000644 Drill head steering |
| 01/05/2006 | US20060000357 Method and system for producing inert gas from combustion by-products |
| 01/04/2006 | EP1611311A1 System and method for treating drilling mud in oil and gas well drilling applications |
| 01/04/2006 | EP0729543B1 Well tool |
| 01/04/2006 | CN2750034Y Drilling gas and fluid mixing device |
| 01/03/2006 | US6982008 Coiled tubing wellbore cleanout |
| 01/03/2006 | US6981561 Downhole cutting mill |
| 01/03/2006 | CA2316467C Dynamic pressure device for oil drill systems |
| 01/03/2006 | CA2248751C Bypass diverter box for drilling mud separation unit |
| 12/29/2005 | WO2005124101A2 Method and system for producing gas and liquid in a subterranean well |
| 12/29/2005 | WO2005124096A1 Apparatus and method for moving drill cuttings |
| 12/29/2005 | US20050284666 Geosynthetic composite for borehole strengthening |
| 12/29/2005 | US20050284641 Controlled variable density fluid for wellbore operations |
| 12/28/2005 | EP1175549B1 Rotating blowout preventer |
| 12/28/2005 | EP1012442B1 A plug for use in wellbore operations, an apparatus for receiving said plug, a plug landing system and a method for cementing tubulars in a wellbore |
| 12/28/2005 | CN1714223A Drill head steering |
| 12/27/2005 | US6978851 Drill cutting treatment method and apparatus |
| 12/27/2005 | US6978844 Filling and circulating apparatus for subsurface exploration |
| 12/27/2005 | CA2428828C A shale shaker |
| 12/27/2005 | CA2303091C A plug for use in wellbore operations, an apparatus for receiving said plug, a plug landing system and a method for cementing tubulars in a wellbore |
| 12/27/2005 | CA2269876C Underbalanced drill string deployment valve method and apparatus |
| 12/27/2005 | CA2182754C Drill pipe float valve and method of manufacture |
| 12/27/2005 | CA2104134C Aqueous drilling muds fluidified by means of zirconium and aluminum complexes |
| 12/22/2005 | WO2005122313A2 Method and apparatus for performing chemical treatments of exposed geological formations |
| 12/22/2005 | WO2005121502A1 Erosion resistent aperture for a downhole valve or ported flow control tool |
| 12/22/2005 | WO2005121496A1 Methods for treating heavy halide brines with permanganates |
| 12/22/2005 | WO2005121495A1 A device in plants for the collection of particles sedimented from water |
| 12/22/2005 | US20050279715 Thermal drill cuttings treatment with weir system |
| 12/22/2005 | US20050279507 Tubular clamp apparatus for top drives & methods of use |