| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 02/11/2009 | CN201193478Y Drivage face emulsion drill against outburst |
| 02/11/2009 | CN201193477Y Power head of electric spiral digging drill |
| 02/11/2009 | CN101365858A System and method for reducing the borehole gap for downhole formation testing sensors |
| 02/11/2009 | CN101363308A HAS high-pressure aerial fog rapid injector |
| 02/11/2009 | CN101363307A Method and apparatus for directional boring under mixed conditions |
| 02/11/2009 | CN101363306A Pneumatic anchor rod hammer drill |
| 02/10/2009 | US7487847 Lateral downhole drilling tool |
| 02/10/2009 | US7487846 Electrically operated drilling method |
| 02/10/2009 | US7487835 Method of developing a re-entry into a parent wellbore from a lateral wellbore, and bottom hole assembly for milling |
| 02/10/2009 | US7487828 Apparatus and method for powering electrical devices along a pipeline |
| 02/10/2009 | CA2451873C Apparatus and method for orientating a downhole control tool |
| 02/10/2009 | CA2384281C Method and device for rotary well drilling |
| 02/05/2009 | WO2009018559A2 Downhole applications of composites having aligned nanotubes for heat transport |
| 02/05/2009 | WO2009018448A2 Return line mounted pump for riserless mud return system |
| 02/05/2009 | WO2008122403A4 Boring system |
| 02/05/2009 | US20090032308 Downhole Tool |
| 02/05/2009 | US20090032307 Coiled Tubing Drilling System |
| 02/05/2009 | US20090032306 Method of Drilling a Stable Borehole |
| 02/05/2009 | US20090032302 Tool face sensor method |
| 02/05/2009 | US20090032301 Return line mounted pump for riserless mud return system |
| 02/05/2009 | US20090032277 Hydraulic drilling machine for working in a small space |
| 02/05/2009 | US20090032242 System and method for controlling liquid removal operations in a gas-producing well |
| 02/05/2009 | CA2693839A1 Downhole applications of composites having aligned nanotubes for heat transport |
| 02/04/2009 | CN201190536Y Boring device used at high altitude |
| 02/04/2009 | CN201190535Y Crane type rotating digging drilling machine |
| 02/04/2009 | CN201190532Y Hammer drill for tunnel ventilation hole |
| 02/04/2009 | CN101358521A Control device of flux distribution for automatic vertical drilling |
| 02/04/2009 | CN101358520A Thrust execution device of automatic vertical drilling |
| 02/04/2009 | CN101358509A Method for producing multi-functional stabilizer and multi-functional stabilizer thereof |
| 02/04/2009 | CN101358508A Method for producing roller of multi-functional stabilizer and roller of multi-functional stabilizer |
| 02/04/2009 | CN101358507A Method for preventing resonance generation between drill string and self elevating drilling platform |
| 02/03/2009 | US7484576 Jack element in communication with an electric motor and or generator |
| 02/03/2009 | US7484575 Conductor pipe string deflector and method |
| 02/03/2009 | US7484573 Slip grip drilling tool |
| 02/03/2009 | US7484559 Method for drilling and casing a wellbore with a pump down cement float |
| 02/03/2009 | CA2506426C Apparatus and method for drilling and reaming a borehole |
| 02/03/2009 | CA2497314C Method and apparatus for removing cuttings |
| 01/29/2009 | WO2009014444A1 Drill device having a rotary-vibratory drive |
| 01/29/2009 | WO2008136624A3 Non-oscillatory rock cutting apparatus using hydraulic pressure and method of controlling hydraulic pressure thereof |
| 01/29/2009 | US20090025982 Stabilizer Assembly |
| 01/29/2009 | US20090025930 Continuous flow drilling systems and methods |
| 01/28/2009 | EP2018463A1 A whipstock |
| 01/28/2009 | CN201187252Y Drill guiders |
| 01/27/2009 | US7481282 Flow operated orienter |
| 01/27/2009 | US7481281 Systems and methods for the drilling and completion of boreholes using a continuously variable transmission to control one or more system components |
| 01/27/2009 | US7481280 Method and apparatus for conducting earth borehole operations using coiled casing |
| 01/27/2009 | CA2541516C Drill string system for performing measurement while drilling and logging while drilling operations |
| 01/27/2009 | CA2383231C Two-step radial expansion |
| 01/25/2009 | CA2595666A1 Modular coiled tubing and sectional pipe drilling rig |
| 01/22/2009 | WO2009011710A1 Hydrothermal energy and deep sea resource recovery system |
| 01/22/2009 | WO2008140883A3 Remotely operated water bottom based drilling system using cable for auxiliary operations |
| 01/22/2009 | US20090023502 Downhole shock absorber for torsional and axial loads |
| 01/22/2009 | US20090020335 Methods, systems and apparatus for production of hydrocarbons from a subterranean formation |
| 01/22/2009 | DE102007034109A1 Device for centering drilling heads during horizontal drilling comprises spring rings arranged between a rod assembly and a bandage ring |
| 01/21/2009 | EP1579104B1 Bit assembly for a hammering drill |
| 01/21/2009 | EP1381750B1 Drilling system with expandable sleeve |
| 01/21/2009 | CN201184202Y Gas filtering device of gas drilling |
| 01/21/2009 | CN201184149Y Deposition crumbs-proof drilling tool |
| 01/21/2009 | CN201184130Y Oil gas well overflow and leakage experimental apparatus |
| 01/21/2009 | CN201184129Y High-efficiency portable combined type percussion borer |
| 01/21/2009 | CN201184124Y Well drill machine |
| 01/21/2009 | CN101351617A Magnetic beacon guidance system |
| 01/21/2009 | CN101349143A Method for designing rotating guide eccentric stabilizer mandrel for well drilling |
| 01/21/2009 | CN101349142A Ground anchor bearing hydraulic drill working machine |
| 01/20/2009 | US7478686 One trip well drilling to total depth |
| 01/20/2009 | US7478685 Hydraulic drilling machine for working in a small space |
| 01/20/2009 | CA2462983C Methods and apparatus to control downhole tools |
| 01/20/2009 | CA2403124C Arrangement for determining position of unmanned mining vehicles |
| 01/15/2009 | WO2009009792A1 Injection system and method |
| 01/15/2009 | WO2009009650A2 Apparatus and methods for drilling and lining a wellbore |
| 01/15/2009 | WO2009009307A1 Apparatus and method of loading a rod box for a horizontal directional drill |
| 01/15/2009 | WO2009007502A1 Method and apparatus for drilling hole into bedrock |
| 01/15/2009 | WO2009007494A1 Bit assembly |
| 01/15/2009 | US20090014216 Geothermal heat loop installation |
| 01/15/2009 | US20090014184 High capacity wellhead connector having a single annular piston |
| 01/15/2009 | DE102006019261B4 Bohrgerät mit beweglicher Lünette Drill with moveable bezel |
| 01/15/2009 | CA2693781A1 Bit assembly |
| 01/15/2009 | CA2692880A1 Apparatus and method of loading a rod box for a horizontal directional drill |
| 01/14/2009 | EP2013438A1 Method and devices for trenchless pipeline laying |
| 01/14/2009 | CN201180495Y Fast connecting apparatus of chip removal pipe for gas drilling |
| 01/14/2009 | CN201180494Y Sweeping device of well plugging device for gas drilling |
| 01/14/2009 | CN201180493Y Spray dust-removing device for gas drilling |
| 01/14/2009 | CN201180492Y Buffering mechanism of chip removal pipe for gas drilling |
| 01/14/2009 | CN201180491Y Long-time open fire apparatus for gas drilling |
| 01/14/2009 | CN201180490Y Vehicle-mounted in-hole perforator |
| 01/14/2009 | CN201180489Y Double-power electrohydraulic mechanical transmission workover rig |
| 01/14/2009 | CN201180488Y Rotary digging drill rig |
| 01/14/2009 | CN201180487Y Non-anchor rope workover rig |
| 01/14/2009 | CN201180486Y Stabilizer used for slim-hole well drilling |
| 01/14/2009 | CN101343995A Control device of down-hole horizontal boring machine |
| 01/14/2009 | CN101343991A Single bore diameter well completion structure and well completion method |
| 01/14/2009 | CN101343981A Integrated drill rig |
| 01/14/2009 | CN101343980A Prizing vehicle mounted hydraulic energy accumulation petroleum workover rig |
| 01/14/2009 | CN101343979A Integrated arm type in-hole perforator |
| 01/13/2009 | US7475742 Method for drilling with casing |
| 01/13/2009 | US7475741 Method and system for precise drilling guidance of twin wells |
| 01/13/2009 | CA2460524C Steerable underreaming bottom hole assembly and method |
| 01/13/2009 | CA2441130C Steel pipe for embedding-expanding, and method of embedding-expanding oil well steel pipe |
| 01/08/2009 | WO2009005479A1 Equipment for excavation of deep boreholes in geological formation and the manner of energy and material transport in the boreholes |
| 01/08/2009 | US20090008151 Rotary Steerable Motor System for Underground Drilling |