| Patents for E21B 3 - Rotary drilling (4,061) |
|---|
| 08/27/2008 | CN101251147A Oil-well rig turntable bearing |
| 08/27/2008 | CN101250979A Rockbolt drilling machine |
| 08/27/2008 | CN101250977A Drilling unit head of deep sea drill core sampling drilling machine |
| 08/20/2008 | CN201103342Y Shallow-stratum drilling machine |
| 08/20/2008 | CN201103341Y Novel anchor lever drilling rig capable of quick switching cutting mode |
| 08/20/2008 | CN100412309C Concrete drilling hole machine with friction sheet |
| 08/19/2008 | CA2470653C Rotary support table |
| 08/14/2008 | WO2007092375B1 Housing and gearbox for drill or driver |
| 08/14/2008 | US20080190667 Recoil auger with clutch bearing |
| 08/13/2008 | CN201100104Y Water-immersed pump suction anti-circulation turning driller |
| 08/13/2008 | CN101240692A Driving structure for double drilling-rod |
| 08/12/2008 | CA2488440C Drilling apparatus and method for introducing a drilling element into the soil |
| 08/07/2008 | WO2008094944A1 System and method for performing oilfield drilling operations using visualization techniques |
| 08/07/2008 | WO2008073612A3 Oilfield operational system and method |
| 08/07/2008 | DE102006022613B4 Bohrantriebseinheit und Bohrgerät Bohrantriebseinheit and drill |
| 08/07/2008 | CA2793811A1 System and method for performing oilfield drilling operations using visualization techniques |
| 08/07/2008 | CA2675531A1 System and method for performing oilfield drilling operations using visualization techniques |
| 08/06/2008 | CN101235704A Rotary drive assembly for a drill rod |
| 07/30/2008 | CN101230574A Pile machine having drilling function and drilling static pressure method |
| 07/29/2008 | US7404453 Method and apparatus for forming square holes for posts |
| 07/29/2008 | CA2389218C Method and device of controlling a rock drilling machine |
| 07/24/2008 | WO2008086693A1 Piling machine with high-pressure jet spiral bit and its piling method |
| 07/24/2008 | WO2008044158A3 Internal breaker for oilfield fluids |
| 07/24/2008 | US20080173461 Method of using grounding system |
| 07/23/2008 | CN201090134Y Novel water tap |
| 07/23/2008 | CN201090133Y Friction master bushing for directional vehicle |
| 07/23/2008 | CN201090132Y Drilling machine |
| 07/22/2008 | US7401663 Electric motor driven hand-held tool |
| 07/16/2008 | CN201087693Y Hole-drilling guncreting mechanical agitation bottom-expanding drill |
| 07/16/2008 | CN100402793C Low tunnel rockbolt anchorage cable pneumatic drilling machine |
| 07/16/2008 | CN100402792C Gantry type self-walking roofbolter |
| 07/10/2008 | US20080164044 Rotary drive assembly for a drill rod |
| 07/09/2008 | CN100401099C Wave detector embedding machine |
| 07/08/2008 | US7395876 Drill driver |
| 07/08/2008 | US7395875 Rechargeable battery-operated hand machine tool |
| 07/01/2008 | US7393156 Construction apparatus for planting a series of vertical posts |
| 06/25/2008 | CN201078189Y Hoist voltage-applying device |
| 06/25/2008 | CN201078188Y Mechanical reduction gear of drill top drive |
| 06/25/2008 | CN201078187Y Hanging ring inclined apparatus of drill top drive tension rod type |
| 06/25/2008 | CN201078186Y Drive unit of drill top drive trench shaft bearing inside blow-out preventer |
| 06/25/2008 | CN201078185Y Double bearing device of drill top drive |
| 06/25/2008 | CN201078184Y Locking device of spline clutch type drill top drive rotating head |
| 06/19/2008 | WO2008073612A2 Oilfield operational system and method |
| 06/18/2008 | EP1931855A1 Mechanically modified filter cake |
| 06/18/2008 | EP1931851A1 Apparatus for gripping a downhole tubular |
| 06/17/2008 | US7387173 Pile driver |
| 06/12/2008 | WO2007092375A3 Housing and gearbox for drill or driver |
| 06/12/2008 | US20080135296 Protective coatings for drill pipe and associated methods |
| 06/11/2008 | CN201071681Y Horizontal stone drilling rig |
| 06/11/2008 | CN201071679Y Rotating head bearing clamp sleeve sealing assembly of top-driving drill means |
| 06/03/2008 | US7380611 Rock drilling machine and rock drilling system |
| 06/03/2008 | US7380591 Mechanical connection system |
| 06/03/2008 | CA2363178C Pipe running tool |
| 06/03/2008 | CA2363096C Snubbing unit tong apparatus |
| 05/28/2008 | CN101187290A Non-dredging guiding driller dynamic head main spindle |
| 05/27/2008 | US7377334 Rotating drilling head drive |
| 05/21/2008 | DE202008004473U1 Bohrantriebseinheit für ein Doppelbohrgestänge Bohrantriebseinheit for a Doppelbohrgestänge |
| 05/17/2008 | CA2747864A1 Top drive interlock |
| 05/15/2008 | WO2007081797B1 Rotary fluid-sealing structure using speed-reduction stages |
| 05/15/2008 | US20080110658 Hand-held power tool |
| 05/15/2008 | US20080110637 Top drive casing system |
| 05/07/2008 | EP1427663B1 Load compensator for a pipe running tool |
| 05/07/2008 | CN201056982Y Compression device of hoist steel wire rope |
| 05/07/2008 | CN201056981Y Power head key sleeve |
| 05/07/2008 | CN201056980Y Sliding lining structure of concrete reinforcement drilling machine |
| 05/07/2008 | CN201056979Y Manual super-light drilling rig |
| 05/07/2008 | CN201056978Y Simple hydraulic drilling machine for mountain area |
| 05/07/2008 | CN101173514A Wheeled helical-digging drilling rig |
| 05/02/2008 | WO2008050150A1 A top drive apparatus for drilling a bore hole |
| 04/30/2008 | CN201053293Y Multi-head equal-thickness deep stirring drill |
| 04/30/2008 | CN201053292Y Machinery power head and hydraulic control long distance feeding drilling machine |
| 04/29/2008 | CA2375778C Rock drill and mounting frame |
| 04/24/2008 | WO2008048163A1 Integrated drilling deck and bop handling |
| 04/24/2008 | US20080093127 Wellbore Tubular Handling Torque Multiplier |
| 04/24/2008 | US20080092363 Drilling and/or hammering tool |
| 04/23/2008 | CN201050297Y Driller power head |
| 04/23/2008 | CN201050296Y Novel feeding device of driller |
| 04/17/2008 | WO2008028075A3 Method and system for managing a drilling operation in a multicomponent particulate system |
| 04/17/2008 | US20080087450 Method for assembling a front cover to a bush in a pneumatic tool |
| 04/16/2008 | CN201047255Y Power head output shaft device of horizontal directional drilling rig |
| 04/16/2008 | CN201047253Y Top driving mechanism of excellent seal interface |
| 04/16/2008 | CN201047252Y Long screw driller hydraulic power head |
| 04/16/2008 | CN201047251Y Novel device for drilling mousehole |
| 04/16/2008 | CN101163848A A method of geothermal loop installation |
| 04/03/2008 | WO2007081797A3 Rotary fluid-sealing structure using speed-reduction stages |
| 04/03/2008 | DE102006059171B3 Double drilling-rod type drilling installation, has connection on outer rod for forming liquid connection to annular cavity between rods |
| 04/02/2008 | EP1658415B1 A drilling device with a telescopic arm |
| 03/26/2008 | CN101148971A Anchor bar drilling machine capable of fast switching cutting way |
| 03/25/2008 | CA2385426C Method and device for moving a tube in a borehole in the ground |
| 03/20/2008 | WO2008033411A1 Safety pin |
| 03/20/2008 | US20080066970 Rotary drill bits |
| 03/20/2008 | US20080066941 Reversible valve assembly for a pneumatic tool |
| 03/20/2008 | US20080066928 Automatic false rotary |
| 03/20/2008 | DE202007016609U1 Motorgetriebener rückentragbarer Erdlochbohrer zum Bohren von Löchern verschiedener Durchmesser Motor-driven move portable hole in the ground drill for drilling holes of different diameters |
| 03/19/2008 | CN201037375Y Well drilling top drive guide rail plate |
| 03/19/2008 | CN201037374Y Well drilling top drive sliding fastening-change head |
| 03/19/2008 | CN201037373Y Rotating mechanism for pneumatic drilling machine |
| 03/18/2008 | US7344054 Power tool |
| 03/12/2008 | EP1896689A2 Pipe running tool having a cement path |
| 03/12/2008 | CN201034014Y Torque transmission device for multi-use drill power head |