| 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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| 04/26/2007 | WO2007045924A1 Shale shaker |
| 04/26/2007 | WO2007045921A1 Method and apparatus for facilitating flow of solids laden drilling fluid from a container |
| 04/25/2007 | CN2893131Y Sand flushing packer |
| 04/25/2007 | CN2893125Y Gas and foam screw drill |
| 04/24/2007 | US7207399 Modular pressure control and drilling waste management apparatus for subterranean borehole operations |
| 04/24/2007 | US7207389 Hybrid coiled tubing/fluid pumping unit |
| 04/24/2007 | US7207385 Method and system for producing gas and liquid in a subterranean well |
| 04/24/2007 | CA2390523C Apparatus for delivering a flowable substance to a remote location |
| 04/24/2007 | CA2253687C Apparatus and methods for stimulating a subterranean well |
| 04/19/2007 | WO2007041841A1 Water-based polymer drilling fluid and method of use |
| 04/19/2007 | WO2007009567A3 Apparatus and method for mixing a liquid material and a flowable powdery material to obtain a slurry |
| 04/19/2007 | WO2007009567A2 Apparatus and method for mixing a liquid material and a flowable powdery material to obtain a slurry |
| 04/19/2007 | US20070084638 Drilling fluid flow facilitation |
| 04/19/2007 | CA2624834A1 Water-based polymer drilling fluid and method of use |
| 04/18/2007 | EP1511937B1 Methods and apparatus for unloading a screw compressor |
| 04/18/2007 | EP1436482B1 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
| 04/18/2007 | CN2890321Y Automatic filling device for trip |
| 04/18/2007 | CN2890320Y Automatic slurry materials feeding device for petroleum drilling |
| 04/18/2007 | CN1948705A Hand held air guide cock tap |
| 04/18/2007 | CN1311141C Method for drilling a borehole and wet boring tool |
| 04/17/2007 | US7204327 Reverse circulation directional and horizontal drilling using concentric drill string |
| 04/17/2007 | US7204323 Clean-Mole™ real-time control system and method for detection and removal of underground minerals, salts, inorganic and organic chemicals utilizing an underground boring machine |
| 04/17/2007 | US7204315 Dual valve well control in underbalanced wells |
| 04/17/2007 | US7204310 Methods of use settable drilling fluids comprising cement kiln dust |
| 04/12/2007 | WO2007039038A1 Device for the quantitative analysis of debris |
| 04/12/2007 | WO2004083595A3 Substantially neutrally buoyant and positively buoyant electrically heated flowlines for production of subsea hydrocarbons |
| 04/12/2007 | US20070079990 System, method, and apparatus for accessing outlets in a two-stage diverter spool assembly |
| 04/12/2007 | US20070079960 Well Treatment System and Method |
| 04/12/2007 | US20070079652 Methods and systems for determining reservoir properties of subterranean formations |
| 04/11/2007 | CN1944937A Submersible reverse circulation engineering drilling rig |
| 04/10/2007 | US7201804 Using extraction fluids under critical temperature, pressure; cleaning hydrocarbons; removal solids form drilling fluids |
| 04/10/2007 | US7201225 Conserving components of fluids |
| 04/10/2007 | CA2363811C Downhole drilling assembly with independent jet pump |
| 04/10/2007 | CA2349391C Wellbore flow control device |
| 04/07/2007 | CA2562819A1 Methods and systems for delivering lost circulation material into drilling pits |
| 04/05/2007 | WO2007036680A1 Apparatus and method for conveying drill cuttings |
| 04/05/2007 | US20070078064 Treatment fluids and methods of forming degradable filter cakes and their use in subterranean formations |
| 04/05/2007 | US20070074999 Vibratory screening machine for earth drilling installation |
| 04/04/2007 | CN2886067Y Flushing packer |
| 04/04/2007 | CN2886061Y Intelligent automatic-control filling blowout-prevention and thermal-insulating device |
| 04/04/2007 | CN2886050Y Drilling machine |
| 04/03/2007 | US7198156 Dam basket for vibratory separators |
| 04/03/2007 | CA2346880C Drilling method |
| 03/29/2007 | WO2007034215A1 Drill cuttings storage and conveying |
| 03/29/2007 | WO2007034139A1 Apparatus for autofill deactivation of float equipment and method of reverse cementing |
| 03/29/2007 | WO2007034136A2 Sub-surface deployment valve |
| 03/29/2007 | US20070068705 Apparatus and method to reduce fluid pressure in a wellbore |
| 03/29/2007 | CA2623508A1 Drill cuttings storage and conveying |
| 03/29/2007 | CA2621053A1 Sub-surface deployment valve |
| 03/28/2007 | EP1767741A2 Real-time control system and method for controlling an underground boring machine |
| 03/28/2007 | EP1766181A1 Apparatus and method for moving drill cuttings |
| 03/28/2007 | CN2883653Y Staging rinser |
| 03/27/2007 | US7195084 Systems and methods for storing and handling drill cuttings |
| 03/27/2007 | US7195082 Drill head steering |
| 03/27/2007 | CA2382356C Method and system for processing of drilling fluid |
| 03/22/2007 | WO2007032811A1 System and method for processing drilling cuttings during offshore drilling |
| 03/22/2007 | WO2007032687A1 Separating device |
| 03/22/2007 | WO2007016313A3 Ball dropping tool method and apparatus |
| 03/22/2007 | US20070062698 Fluid with asphaltene control |
| 03/21/2007 | EP1421252B1 Washpipe assembly |
| 03/21/2007 | CN2881068Y Centrifugal vacuum deaerator |
| 03/21/2007 | CN2881067Y High pressure jet and flushing device of concentric pipe |
| 03/21/2007 | CN2881062Y Drill rod circulation well washing apparatus |
| 03/21/2007 | CN1932234A Method and apparatus for realizing double-gradient well drilling |
| 03/20/2007 | US7192908 Injecting blend of fluorboric acid and chelate compound; adjust permeability; dissolving clays |
| 03/20/2007 | US7191835 Disengagable burr mill |
| 03/20/2007 | CA2354994C Acoustic flow pulsing apparatus and method for drill string |
| 03/15/2007 | WO2007028996A1 Method and system for processing oil and gas well cuttings utilizing existing slurry processing equipment |
| 03/15/2007 | US20070056775 Pressure-actuated seals for rotating members |
| 03/15/2007 | US20070056774 Apparatus and methods for drilling a wellbore using casing |
| 03/15/2007 | US20070056773 Downhole impeller device |
| 03/15/2007 | US20070056731 Method for reducing density of a system fluid and for performing drilling operations using a reduced density system fluid comprising aerogel |
| 03/15/2007 | US20070056730 Well treating method to prevent or cure lost-circulation |
| 03/15/2007 | US20070056611 Waste solid cleaning |
| 03/14/2007 | EP1762696A2 Iinternal riser rotating control head |
| 03/14/2007 | EP1332273B1 Downhole valve device |
| 03/14/2007 | CN2878655Y Liquid-spraying device |
| 03/14/2007 | CN1930369A Expander for expanding a tubular element |
| 03/14/2007 | CN1928318A Stainless steel seepage scale removal blowdown backwash fine filter for flooding well |
| 03/14/2007 | CN1304718C Horizontal direction boring machine and underground boring system |
| 03/13/2007 | US7188686 Top drive systems |
| 03/13/2007 | US7188683 Drilling method |
| 03/13/2007 | CA2314805C Slow rotating tool with gear reducer |
| 03/08/2007 | WO2007005321A3 Filter screen with molded end cap for oilfield screens |
| 03/08/2007 | WO2006134446A3 Novel activating mechanism for controlling the operation of a downhole tool |
| 03/08/2007 | US20070051539 Method and system for processing oil and gas well cuttings utilizing existing slurry processing equipment |
| 03/07/2007 | CN2876317Y Locking type washable well packer and corollary used well washing valve switching tool |
| 03/07/2007 | CN1924280A Chuck and water swivel integrated apparatus for gas pump drainage and discharge full hydraulic driller |
| 03/06/2007 | US7185720 Hole digger |
| 03/06/2007 | US7185719 Dynamic annular pressure control apparatus and method |
| 03/06/2007 | US7185718 Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings |
| 03/06/2007 | US7185705 System and method for recovering return fluid from subsea wellbores |
| 03/01/2007 | WO2007024142A1 A method of fragmenting hard particles |
| 03/01/2007 | WO2007003894A3 Wellbore cleaning method and apparatus |
| 03/01/2007 | US20070045006 Control systems and methods for real-time downhole pressure management (ECD control) |
| 03/01/2007 | CA2620925A1 An apparatus and a method of fragmenting hard particles |
| 02/28/2007 | EP1756392A1 A device in plants for the collection of particles sedimented from water |
| 02/28/2007 | EP1613834A4 Vibratory screening machine for earth drilling installation |
| 02/28/2007 | CN1922383A System, tank and output unit for transporting untreated drill cuttings |
| 02/27/2007 | US7182138 Reservoir communication by creating a local underbalance and using treatment fluid |