| 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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| 07/29/2004 | US20040144566 Boring apparatus |
| 07/29/2004 | US20040144565 Method and apparatus for directly controlling pressure and position associated with an adjustable choke apparatus |
| 07/29/2004 | US20040144547 Methods and apparatus for applying torque and rotation to connections |
| 07/29/2004 | US20040144405 Heating wastes in chemical reactor; evaporating liquid impurities; disposal of solids |
| 07/28/2004 | CN1159143C Hole-drilling bust collector for air conditioner installation |
| 07/27/2004 | US6766856 Large particulate removal system |
| 07/27/2004 | CA2200274C Floating apparatus and method for fabricating the apparatus |
| 07/22/2004 | WO2004061260A1 A rock drilling arrangement |
| 07/22/2004 | WO2003093792A3 Compositions and methods for sealing formations |
| 07/22/2004 | US20040140129 Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings |
| 07/22/2004 | US20040140128 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 07/22/2004 | US20040139866 Method and system for treating and shaping drill cuttings leaving the well bore for transportation and/or disposal of drill cuttings |
| 07/21/2004 | EP1438482A2 Cementing system for wellbores |
| 07/21/2004 | CN2627201Y Slurry agitating and injection apparatus |
| 07/21/2004 | CN2627200Y High pressure oil and water well pressurized down-hole sand removal device |
| 07/20/2004 | US6763901 Air delivery system for a direct push drilling swivel |
| 07/20/2004 | US6763605 Centrifugal drill cuttings drying apparatus |
| 07/15/2004 | WO2003076764A3 Method and system for controlling well circulation rate |
| 07/15/2004 | US20040134664 Method and apparatus for surge pressure reduction in a tool with fluid motivator |
| 07/15/2004 | US20040134662 High power umbilicals for electric flowline immersion heating of produced hydrocarbons |
| 07/15/2004 | DE10258963A1 Hydraulic drilling of well borehole in ground containing coarse clays, cuts layer from borehole walls mechanically when pulling drillstring, with continued flow of drilling fluid |
| 07/14/2004 | EP1436482A2 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
| 07/14/2004 | EP0920484B1 Improved oil-based drilling fluid |
| 07/10/2004 | CA2416076A1 Continuous self-cleaning drilling fluid tank |
| 07/08/2004 | WO2004013446A3 Self-excited drill bit sub |
| 07/08/2004 | WO2001094749A8 Real-time method for maintaining formation stability |
| 07/08/2004 | US20040129460 Method for using coconut coir as a lost circulation material for well drilling |
| 07/08/2004 | US20040129456 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 07/08/2004 | US20040129424 Instrumentation for a downhole deployment valve |
| 07/08/2004 | US20040129423 Downhole tool |
| 07/08/2004 | US20040129422 Apparatus and method for wellbore isolation |
| 07/08/2004 | US20040129421 Filtered actuator port for hydraulically actuated downhole tools |
| 07/07/2004 | EP1210499B1 Method and system for processing of drilling fluid |
| 07/06/2004 | US6758982 Integrated debris management method |
| 07/06/2004 | US6758281 Methods and apparatus for creating a downhole buoyant casing chamber |
| 07/06/2004 | US6758276 Method and apparatus for displacing drilling fluids with completion and workover fluids, and for cleaning tubular members |
| 07/06/2004 | CA2193309C Early evaluation system with pump and method of servicing a well |
| 07/01/2004 | WO2004055320A1 Apparatus for the cooling of drilling liquids |
| 07/01/2004 | WO2004055317A2 Well bore cleaning and tubular circulating and flow-back apparatus |
| 07/01/2004 | WO2004041400A3 Method and apparatus for treating a contaminated fluid |
| 07/01/2004 | WO2004031533A3 Downhole ball dropping apparatus |
| 07/01/2004 | WO2003072903A3 Drill cutting treatment method and apparatus |
| 07/01/2004 | US20040124015 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 07/01/2004 | US20040124014 Drill cutting treatment method and apparatus |
| 07/01/2004 | US20040124008 Subsea wellbore drilling system for reducing bottom hole pressure |
| 07/01/2004 | US20040123984 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 07/01/2004 | CA2507778A1 Well bore cleaning and tubular circulating and flow-back apparatus |
| 06/30/2004 | EP1432887A1 System for controlling the discharge of drilling fluid |
| 06/30/2004 | EP0866842B1 Drilling fluid loss prevention and lubrication additive |
| 06/30/2004 | CN2622379Y Valve disc controller for mud pump of well drilling |
| 06/29/2004 | US6755261 Method and system for controlling well fluid circulation rate |
| 06/29/2004 | US6755252 Downhole surge pressure reduction and filtering apparatus |
| 06/29/2004 | CA2333166C Generating commands for a downhole tool |
| 06/29/2004 | CA2190448C Well casing fill apparatus and methods |
| 06/29/2004 | CA2006010C The use of selected ester oils in drilling fluids and muds |
| 06/24/2004 | WO2004053935A2 High power umbilicals for electric flowline immersion heating of produced hydrocarbons |
| 06/24/2004 | WO2004053289A1 Seal cup for a wellbore tool and method |
| 06/24/2004 | WO2004053288A1 Anchoring device for a wellbore tool |
| 06/24/2004 | WO2003071091A9 Dynamic annular pressure control apparatus and method |
| 06/24/2004 | WO2003040514A3 Proppant recovery system |
| 06/24/2004 | US20040118614 Apparatus and method for drilling with casing |
| 06/24/2004 | US20040118613 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 06/24/2004 | US20040118564 Method and apparatus for wellbore fluid treatment |
| 06/24/2004 | US20040118560 Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore |
| 06/24/2004 | DE10258220A1 Production of borehole, for conveying crude oil from underwater regions, involves using drill string comprising pipes made from light high strength material and drill head |
| 06/23/2004 | EP1161614B1 Downhole bypass valve |
| 06/22/2004 | US6752273 Recycling oil or gas well mined or excavated material into use by third party rather than buring; eliminating responsibility for mineral wastes; classifying, sizing and containerizing |
| 06/22/2004 | US6752209 Cementing system and method for wellbores |
| 06/17/2004 | WO2004051055A2 Welbore cleanout tool and method |
| 06/17/2004 | US20040115435 High Volume Density Polycrystalline Diamond With Working Surfaces Depleted Of Catalyzing Material |
| 06/17/2004 | US20040113482 Portable placer exploration and sampling apparatus |
| 06/17/2004 | US20040112816 Shale bin/settling tank/centrifuge combination skid |
| 06/17/2004 | US20040112646 Steel; rotation drilling; in situ cementing casing |
| 06/17/2004 | US20040112645 Method and apparatus for removing cuttings from a deviated wellbore |
| 06/17/2004 | US20040112642 Downhole cutting mill |
| 06/17/2004 | US20040112606 Mono-trip cement thru completion |
| 06/17/2004 | US20040112600 Zeolite-containing cement composition |
| 06/17/2004 | US20040112599 Cement through side pocket mandrel |
| 06/17/2004 | US20040112595 Permanent downhole deployment of optical sensors |
| 06/17/2004 | US20040112588 Well bore cleaning and tubular circulating and flow-back apparatus |
| 06/16/2004 | EP1169406B1 Method of releasing stuck pipe or tools and spotting fluids therefor |
| 06/15/2004 | US6749033 Polycrystalline diamond partially depleted of catalyzing material |
| 06/10/2004 | WO2004048747A1 Drilling fluid circulation system and method |
| 06/10/2004 | WO2004033855A3 Well control using pressure while drilling measurements |
| 06/10/2004 | US20040108142 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 06/10/2004 | US20040108140 Method and apparatus for drilling and completing a well with an expandable sand control system |
| 06/10/2004 | US20040108138 Hydraulic Optimization of Drilling Fluids in Borehole Drilling |
| 06/10/2004 | US20040108110 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 06/09/2004 | EP1426550A1 Methods and apparatus for applying torque and rotation to coupling members |
| 06/09/2004 | EP1425494A2 Swing mounted fill up and circulating tool |
| 06/08/2004 | US6747570 Method for preventing fracturing of a formation proximal to a casing shoe of well bore during drilling operations |
| 06/08/2004 | US6745857 Method of drilling sub-sea oil and gas production wells |
| 06/08/2004 | US6745855 Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings |
| 06/08/2004 | US6745851 Methods and system for processing of drilling fluid |
| 06/03/2004 | WO2004046498A1 Apparatus for recycling of oil based drilling fluid contaminated with water |
| 06/03/2004 | US20040106524 Separation mixture of drilling fluid and hydrocarbons; solvent extraction |
| 06/03/2004 | US20040105806 Polycrystalline diamond partially depleted of catalyzing material |
| 06/03/2004 | US20040104052 Reverse circulation directional and horizontal drilling using concentric coil tubing |
| 06/03/2004 | US20040104050 Method for drilling and drilling apparatus |
| 06/03/2004 | US20040104030 Reverse circulation clean out system for low pressure gas wells |