| Patents for E21B 3 - Rotary drilling (4,061) |
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| 05/06/2010 | US20100109420 Milling head and method for machining pile heads |
| 05/06/2010 | US20100108380 Methods and apparatuses for estimating drill bit cutting effectiveness |
| 05/05/2010 | EP2181236A1 Tapered surface bearing assembly and well drilling equipment comprising same |
| 05/05/2010 | EP2181235A1 Spring preloaded bearing assembly and well drilling equipment comprising same |
| 05/05/2010 | CN201448053U Tracked normal and reverse circulation drill |
| 05/05/2010 | CN201448051U Hoister of rotary drilling rig and connection structure thereof |
| 05/05/2010 | CN201448050U Rapid lifting mechanism of hoisting frame of trench coring machine |
| 05/05/2010 | CN201444749U Boring and borrow machine for tree planting |
| 05/05/2010 | CN101701503A Screw drill with skeleton-type stator |
| 05/04/2010 | US7708089 Breech lock stripper rubber pot mounting structure and well drilling equipment comprising same |
| 04/29/2010 | WO2010048521A2 Coupling for downhole tools |
| 04/28/2010 | CN201443300U Overflowing and anti-falling integrated screwdrill |
| 04/28/2010 | CN101699018A Automatic continuously variable transmission (CVT) drilling and repairing well top drive |
| 04/22/2010 | WO2010044673A1 Power tong device |
| 04/22/2010 | US20100096189 Vertical drilling system for controlling deviation |
| 04/21/2010 | CN201439687U Drilling machine for three-circle interconnected bored pile |
| 04/14/2010 | CN101694148A Motor driving part of anchor drill |
| 04/08/2010 | WO2010038932A1 High-strength earth-wire under-bracing construction method using circular earth-wire under-bracing and hydraulically expandable excavating screw |
| 04/07/2010 | EP1458949B1 Rotary support table |
| 04/01/2010 | WO2010037108A2 Electrical control for a downhole system |
| 04/01/2010 | WO2010036564A2 Modular rotary drill head |
| 04/01/2010 | US20100078221 Modular rotary drill head |
| 04/01/2010 | CA2738008A1 Modular rotary drill head |
| 03/31/2010 | CN201433711Y Drilling equipment used for dig drilling machine |
| 03/31/2010 | CN201433710Y Petroleum drilling machine rotating disk bearing |
| 03/31/2010 | CN201433709Y Novel drill feeding device |
| 03/31/2010 | CN101688431A Top drive systems with reverse bend bails |
| 03/31/2010 | CN101688430A A top drive apparatus |
| 03/25/2010 | US20100074702 Spindle drive coupling |
| 03/25/2010 | US20100071958 Blast Hole Drill Bit Carousel And A Blast Hole Drill Including A Blast Hole Drill Bit Carousel |
| 03/24/2010 | EP2166193A1 Improvements in or relating to top drives |
| 03/24/2010 | CN201428394Y Anti-dropping joint device of screw bolt drilling tool |
| 03/24/2010 | CN201428379Y Dematron rig |
| 03/23/2010 | US7681631 Automatic false rotary |
| 03/18/2010 | US20100069167 Kelly driver |
| 03/18/2010 | US20100065335 Articulation assembly for moving a drill mast |
| 03/18/2010 | US20100065331 Auger boring machine |
| 03/17/2010 | CN201424928Y Feeding mechanism of water well drilling jig |
| 03/17/2010 | CN101675206A Rig engine control |
| 03/17/2010 | CA2678832A1 Improvements in or relating to top drives |
| 03/16/2010 | US7677331 AC coiled tubing rig with automated drilling system and method of using the same |
| 03/11/2010 | WO2010027380A1 Feed mechanism for drilling systems |
| 03/11/2010 | CA2735906A1 Feed mechanism for drilling systems |
| 03/10/2010 | CN201420501Y Hydraulic rotary table |
| 03/10/2010 | CN101668921A Top drive apparatus |
| 03/03/2010 | EP2158377A2 Top drive apparatus and bails therefor |
| 03/03/2010 | CN201416390Y Lift type coal mine gallery gas drill |
| 02/24/2010 | EP2157277A1 Well drilling apparatus |
| 02/23/2010 | USRE41141 Combined drilling apparatus and method |
| 02/23/2010 | US7665739 Pressure-actuated seals for rotating members |
| 02/23/2010 | US7665530 Tubular grippers and top drive systems |
| 02/17/2010 | CN201407038Y Electronic door locking device and door |
| 02/17/2010 | CN201407004Y Double-bottom drilling bucket of rotary drilling rig |
| 02/17/2010 | CN201406985Y Remotely-controlled pneumatic hydraulic reverse-circulation well drilling machine |
| 02/17/2010 | CN101652530A Top drive apparatus |
| 02/17/2010 | CN101649721A Hydraulic rotary anchor head |
| 02/16/2010 | US7661486 Power tool with battery pack ejector |
| 02/11/2010 | WO2010017371A1 Precision torque tool |
| 02/11/2010 | WO2010017367A2 Percussion assisted rotary earth bit and method of operating the same |
| 02/11/2010 | CA2701507A1 Percussion assisted rotary earth bit and method of operating the same |
| 02/10/2010 | CN201401127Y Drilling rig rotary table hydraulic driving mechanism |
| 02/10/2010 | CN201401126Y Bidirectional double-stirring transmission device |
| 02/09/2010 | US7658242 Hole coring system with lever arm |
| 02/04/2010 | US20100025117 Spring load seal assembly and well drilling equipment comprising same |
| 02/04/2010 | US20100025108 Method for drilling rock |
| 02/04/2010 | DE102008034083A1 Erdbohrvorrichtung Boring apparatus |
| 02/03/2010 | CN201396064Y Luffing mechanism and rotary drilling rig with same |
| 02/02/2010 | US7654325 Methods and apparatus for handling and drilling with tubulars or casing |
| 01/28/2010 | WO2010009826A1 Earth auger device |
| 01/28/2010 | US20100018778 Seal comprising elastomeric composition with nanoparticles |
| 01/27/2010 | CN201391224Y Boosting driving device for rotary steering drilling tool |
| 01/27/2010 | CN201391223Y Multi-shaft long screw occlusion drill |
| 01/27/2010 | CN100585093C Pile machine having drilling function and drilling static pressure method |
| 01/21/2010 | US20100012382 Drill bits with increased crown height |
| 01/21/2010 | US20100012381 Drill bits with notches and enclosed slots |
| 01/21/2010 | US20100012376 Monolithic movable rotary well drilling rig |
| 01/20/2010 | CN201386506Y Multi-station rat hole device |
| 01/13/2010 | CN101624896A Double power head drilling equipment |
| 01/07/2010 | US20100000796 Earth Drilling Device |
| 01/07/2010 | US20100000067 Battery For A Power Tool With A Battery Pack Ejector |
| 01/06/2010 | CN201377335Y Underground crawler traveling type rotary gas drilling machine |
| 01/06/2010 | CN201377286Y Digital actuating device for drilling machine |
| 01/05/2010 | US7641000 System for directional boring including a drilling head with overrunning clutch and method of boring |
| 01/05/2010 | CA2451263C Methods and apparatus for applying torque and rotation to connections |
| 12/30/2009 | CN201372720Y Device for steering and steadying turntable of crawler-type underground drill rig |
| 12/30/2009 | CN201372719Y Electric multifunctional trial run device for drilling equipment |
| 12/30/2009 | CN100575656C Full-hydraulic multifunctional driller for gas extraction, drainage and discharge |
| 12/24/2009 | US20090317194 Drilling rig and drilling method |
| 12/24/2009 | DE102008003968B3 Bohranlage Drilling rig |
| 12/23/2009 | WO2009076648A3 Top drive system |
| 12/23/2009 | CN101608449A Big-end anchor rod and whirl jet drill rig and construction method for implementing same |
| 12/23/2009 | CN100572741C Portable well-digging machine |
| 12/23/2009 | CN100572740C Assemblage control system and method for establishing threaded connection |
| 12/22/2009 | US7635034 Spring load seal assembly and well drilling equipment comprising same |
| 12/17/2009 | US20090308629 Rotating tool |
| 12/16/2009 | CN201363086Y Auger drill of rotary drilling rig |
| 12/16/2009 | CN101603411A Drilling rig and drilling method |
| 12/16/2009 | CN101603409A Large-torque electrical power head of long screw drilling machine |
| 12/16/2009 | CN101603309A Occlusive pile of long spiral stirring water-stop curtain and construction process thereof |
| 12/10/2009 | WO2009149469A1 Self-adjusting pipe spinner |