| Patents for E21B 3 - Rotary drilling (4,061) |
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| 10/11/2007 | DE19906687B4 Doppelkopfbohrvorrichtung kurzer Bauart Doppelkopfbohrvorrichtung short length |
| 10/10/2007 | EP1676015A4 Make-up control system for tubulars |
| 10/10/2007 | EP1671010A4 Method and apparatus for controlling the ascent and descent of pipe in a well bore |
| 10/10/2007 | CN200958366Y Fixed-depth soil driller |
| 10/09/2007 | CA2267426C Continuous circulation drilling method |
| 10/03/2007 | CN200955352Y Gas-exhaust drill power-head on-line adjustable guide supporting device |
| 10/03/2007 | CN200955351Y Gas exhausting drill auxiliary turning-about device |
| 10/03/2007 | CN200955350Y Underwater pipeline perforating machine capable of controlling feeding depth |
| 10/02/2007 | CA2210421C Deep drilling an/or well pump system using a hydrodynamic retarder to compensate for restoring torques released in the system |
| 09/27/2007 | US20070221392 Hand-held power tool with grounding |
| 09/26/2007 | CN200952350Y Gas drainage driller unit head adjustable guiding supporting device |
| 09/26/2007 | CN200952349Y Gas drilling machine dismounting and displacing auxiliary device |
| 09/26/2007 | CN200952348Y Long auger boring machine with spillover device |
| 09/26/2007 | CN200952347Y Chuck and water swivel integrated device for gas drainage full hydraulic drilling machine |
| 09/19/2007 | CN200949420Y Portable well-digging machine |
| 09/18/2007 | US7270194 Drilling machine with pneumatic control |
| 09/13/2007 | US20070209840 Method and apparatus for forming square holes for posts |
| 09/12/2007 | EP1171683B1 Pipe running tool |
| 09/12/2007 | CN200946457Y Large torque hydraulic turntable |
| 09/05/2007 | CN200943444Y Spiral digging machine |
| 09/05/2007 | CN200943440Y Quick socketing type guide rail for petroleum drilling machine top drive device |
| 09/05/2007 | CN101029556A Arc gear-transmission pneumatic driller |
| 09/05/2007 | CN100335736C Rotary support table and method for providing power slip |
| 09/04/2007 | US7264066 Drilling apparatus and method for introducing a drilling element into the soil |
| 08/30/2007 | US20070199690 Mechanical connection system |
| 08/29/2007 | CN200940442Y Rotary device of vertical shaft rotary drilling machine |
| 08/29/2007 | CN200940441Y Full hydraulic drilling machine |
| 08/29/2007 | CN200940440Y Rotary digging drilling machine with continuous wall crab bucket function |
| 08/29/2007 | CN200940439Y Gantry self walking anchor rod drilling machine |
| 08/23/2007 | WO2007093787A1 Big assembly with movable rig floor units |
| 08/22/2007 | CN2937481Y Small drill anchor setting integral machine |
| 08/22/2007 | CN2937440Y Earth boring machine |
| 08/22/2007 | CN2937438Y Core drilling machine |
| 08/15/2007 | EP1817478A1 Elevator for use in handling pipe and method for handling pipe |
| 08/15/2007 | CN101018925A Top drive |
| 08/15/2007 | CN101018633A Housing with functional overmold |
| 08/14/2007 | CA2355740C Hydraulic actuator |
| 08/09/2007 | US20070181344 Drilling head with protective screen |
| 08/08/2007 | CN2931755Y Wheeled type rotary digging driller |
| 08/08/2007 | CN2931753Y Minisize well borer |
| 08/08/2007 | CN2931752Y Hand-held water injection type coal seam drill for exploring water |
| 08/08/2007 | CN2931751Y Sounding borer with supporting rack |
| 08/08/2007 | CN101012735A Portable well-digging machine |
| 08/07/2007 | US7252155 Percussive power tool with flushing head |
| 08/07/2007 | US7252151 Drilling method |
| 08/01/2007 | EP1689967A4 Drilling apparatus with anti-vibration inertial body |
| 08/01/2007 | CN2929286Y Oiltank of top driven well drilling device |
| 08/01/2007 | CN2929190Y Hydraulic anchor rod machine |
| 08/01/2007 | CN2929140Y Hydraulic top driver |
| 08/01/2007 | CN2929139Y Drilling device |
| 08/01/2007 | CN1329616C Support type universal drilling machine |
| 07/26/2007 | US20070169930 Method and apparatus for drilling with casing |
| 07/25/2007 | CN2926473Y Pit driller |
| 07/25/2007 | CN1328471C Application of drilling system and method of drilling |
| 07/19/2007 | WO2007081797A2 Rotary fluid-sealing structure using speed-reduction stages |
| 07/18/2007 | CN2923970Y Novel power head |
| 07/18/2007 | CN2923969Y Ladder-shape screw-pitch propelling extrusion, perforation, broaching pile engine |
| 07/12/2007 | US20070158112 Rotary fluid-sealing structure using speed-reduction stages |
| 07/11/2007 | CN1995689A Pile forming mechanism with gyro bit and the gyro bit and pile forming method |
| 07/11/2007 | CN1995685A Pile forming mechanism with high-pressure-jet gyro bit and pile forming method |
| 07/05/2007 | CA2820242A1 Modular top drive |
| 07/05/2007 | CA2634223A1 Modular top drive |
| 07/04/2007 | EP1802843A1 Drill bushing |
| 07/04/2007 | EP1257724B1 Apparatus and method relating to tongs, continuous circulation and to safety slips |
| 07/03/2007 | US7237625 Device for simulataneously casing a hole while drilling |
| 06/28/2007 | US20070144786 Stripper rubber adapter |
| 06/27/2007 | CN2916091Y Rotary-working type vehicle-mounted jumbolter device of tunneling machine |
| 06/27/2007 | CN2916090Y Pneumatic drill |
| 06/27/2007 | CN1987038A Automatic drilling machine for hand held water drill |
| 06/26/2007 | US7234543 Systems and methods for directionally drilling a borehole using a continuously variable transmission |
| 06/21/2007 | WO2007068103A1 A vibratory apparatus for a rotary-vibratory drill |
| 06/20/2007 | CN2913577Y Simple rotary digging driller |
| 06/20/2007 | CN1985066A Apparatus and method for modified horizontal directional drilling assembly |
| 06/19/2007 | US7231969 Wellbore top drive power systems and methods of use |
| 06/13/2007 | CN2911169Y Borer |
| 06/12/2007 | US7228920 Drilling apparatus and method for introducing a drilling element into the soil |
| 06/12/2007 | US7228913 Tubular clamp apparatus for top drives and methods of use |
| 06/07/2007 | WO2007064232A1 Top drive drilling apparatus |
| 06/07/2007 | WO2007064231A1 Top drive drilling apparatus |
| 06/07/2007 | CA2631313A1 Top drive drilling apparatus |
| 06/07/2007 | CA2630793A1 Top drive drilling apparatus |
| 06/06/2007 | CN2908756Y Rotating device of rotary table of drilling machine |
| 06/06/2007 | CN2908755Y Device for jointly driving petroleum drilling machine by diesel engine and speed-reglation type hydraulic speed reducer |
| 06/06/2007 | CN2908754Y Device for jointly driving petroleum drilling machine by diesel engine and speed-regulation type hydraulic speed reduction RMB |
| 06/06/2007 | CN1320251C Drilling apparatus and method for introducing a drilling element into the soil |
| 06/06/2007 | CN1320250C Drilling tool of the displacing type in soil and method |
| 05/30/2007 | CN2906022Y Arched gear-driven pneumatic drilling machine |
| 05/30/2007 | CN2906021Y Small-sized machine-carried jumbolter |
| 05/30/2007 | CN2906020Y Drilling-anchoring integrated guide rail type jumbolter |
| 05/30/2007 | CN2906019Y Guide rail type jumbolter |
| 05/29/2007 | US7222683 Wellbore top drive systems |
| 05/24/2007 | US20070114070 Drilling and anchor-setting tool |
| 05/23/2007 | CN2903332Y Multifunctional core prospecting drill |
| 05/23/2007 | CN2903331Y Multishaft hole drilling machine |
| 05/23/2007 | CN2903330Y Uniform loading propulsive force bearing joint |
| 05/16/2007 | CN2900755Y Drill bit suitable for anchor rod and anchor cable |
| 05/16/2007 | CN2900754Y Double layer slide frame propeller for drill vehicle |
| 05/15/2007 | CA2207755C A drilling method and bit assembly to realize the method |
| 05/09/2007 | CN2898258Y Petroleum drilling rig driven by motor and speed-adjusting hydraulic coupler parallelly |
| 05/03/2007 | WO2006019693A3 Apparatus, system and method for positioning and stabbing well tubulars |