| Patents for E21B 3 - Rotary drilling (4,061) |
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| 10/23/2013 | CN203248599U Counterweight self-detached structure of rotary drilling rig and rotary drilling rig |
| 10/23/2013 | CN203248072U Self-walking shale gas drilling machine |
| 10/23/2013 | CN203248064U Pneumatic drilling machine propelling system |
| 10/23/2013 | CN203248063U Audio-frequency vibration power head and tractor drilling machine comprising same |
| 10/23/2013 | CN203248062U Integrated power device of truck-mounted drilling rig |
| 10/23/2013 | CN203248061U Floating tooth plate drive sleeve and power head of rotary drilling rig |
| 10/23/2013 | CN203248060U Hydraulic drilling rig for drilling in coal mine |
| 10/23/2013 | CN203248059U Electric drilling machine for road and bridge maintaining |
| 10/23/2013 | CN103362437A Portal frame type core drilling machine |
| 10/23/2013 | CN103362436A Hydraulic vertically-lifting trench excavator |
| 10/22/2013 | US8561717 Articulating drill with integrated circuit board and method of operation |
| 10/22/2013 | US8561714 Hand-held power tool |
| 10/22/2013 | CA2585979C Worm and collar drive drill rig |
| 10/17/2013 | WO2013154271A1 Rotary head of large-diameter drilling machine |
| 10/17/2013 | WO2013092911A3 Casing and adapter for producing a mechanical connection between a top drive and a casing |
| 10/16/2013 | CN203238634U Vehicle-mounted hydraulic spiral pile driver |
| 10/15/2013 | US8556004 Bottom preventer for use in a drilling system |
| 10/02/2013 | CN203223171U Simple highway drilling machine |
| 10/02/2013 | CN203223169U Rotary pile drilling rig |
| 09/25/2013 | CN203213955U Arch center pipe shed drilling rig |
| 09/25/2013 | CN203213953U Hydraulic engineering driller provided with power heads |
| 09/25/2013 | CN203213952U Transmission mechanism with double inputs |
| 09/25/2013 | CN103321567A Drill tool and method for measuring thicknesses of sea ice and river ice while drilling |
| 09/25/2013 | CN103321474A Hole-drilling pole-erecting vehicle |
| 09/18/2013 | CN203201498U Soil compacting and discharging drilling rod, spiral drill and pile machine |
| 09/18/2013 | CN203201458U Power head hub, power box provided with power head hub and power head provided with power box |
| 09/18/2013 | CN102226406B Construction method of super-long advanced anchor bars |
| 09/17/2013 | US8538697 Core sample preparation, analysis, and virtual presentation |
| 09/17/2013 | CA2718116C Top drive apparatus |
| 09/11/2013 | CN203188903U Combined type driving key with detachable rotary drilling rig power head |
| 09/11/2013 | CN203188902U Mining pneumatic frame column type drilling rig |
| 09/11/2013 | CN203188901U Movable type power head of full hydraulic core drill |
| 09/11/2013 | CN203188900U Large-scale non-excavation pipelaying drilling machine power head |
| 09/11/2013 | CN203188899U Full sleeve special-type drilling machine |
| 09/11/2013 | CN103291212A Long spiral power head buffer device and multifunctional power head buffer device of rotary drilling rig |
| 09/11/2013 | CN103291211A Power head preventing silt from intruding into box body |
| 09/11/2013 | CN103291210A Gate-type double-tower gear-driven drilling machine |
| 09/11/2013 | CN101936132B Reciprocating drill for mine |
| 09/11/2013 | CN101936128B Drilling machine for mines |
| 09/11/2013 | CN101936127B Mine drilling machine |
| 09/10/2013 | US8528659 Pneumatic power tool with exhaust silencer |
| 09/06/2013 | WO2012148807A3 Mechanically actuated casing drive system tool |
| 09/04/2013 | CN203175393U Turntable with buckle dismounting function |
| 09/04/2013 | CN203175392U Petroleum drilling machine turnplate and bearing used for petroleum drilling machine turnplate |
| 09/04/2013 | CN203175391U Multifunctional drill power head |
| 09/04/2013 | CN203175390U Dual-power hydraulic well drill jacking driving device |
| 09/04/2013 | CN203175389U Modular easy-transition kilometer-grade rock core drilling equipment |
| 09/04/2013 | CN103277042A Drilling machine and hydraulic control system of drilling machine power head |
| 09/04/2013 | CN103277041A Spline type clutch transmission device |
| 09/04/2013 | CN103277040A Power head used by rotary excavating drilling machine and long spiral drilling machine in common |
| 09/04/2013 | CN103277039A Power head capable of driving drill bit into rock |
| 09/04/2013 | CN102535445B Molding device and molding method for long spiral extruding rock-entering cast-in-place pile |
| 09/03/2013 | US8525690 Synchronized telemetry from a rotating element |
| 08/28/2013 | CN203161095U Drilling machine and rotary device thereof |
| 08/28/2013 | CN203161077U Multifunctional vertical shaft type core drill |
| 08/28/2013 | CN203161076U Pile foundation drilling machine with ultra-large aperture |
| 08/28/2013 | CN103266851A Power head for reducing oil-shortage abrasion of bearing |
| 08/28/2013 | CN102261096B Crankshaft holing needle of trench sawing machine |
| 08/28/2013 | CA2806742A1 Torque control device for a downhole drilling assembly |
| 08/28/2013 | CA2791201A1 Drive device and method for driving a drill rod |
| 08/22/2013 | US20130216312 Method, System And Rock Drilling Apparatus For Installing A Pipe In Drilled Holes In Rock Drilling |
| 08/21/2013 | CN203146748U Double-speed ratio gyration reducer |
| 08/21/2013 | CN203146698U Drilling machine with balance weight being flexibly increased and decreased |
| 08/21/2013 | CN203146263U Reverse circulation deep-well drilling machine power head second-level water-elevating device |
| 08/21/2013 | CN203145972U Pneumatic anchor rod drilling rig |
| 08/21/2013 | CN203145827U Trestle type column all-hydraulic drill for coal mine |
| 08/21/2013 | CN203145826U Pipe shed drill power head |
| 08/21/2013 | CN203145825U Oversized-aperture pile foundation drilling machine |
| 08/21/2013 | CN203145014U Pipe pile cleaning tool |
| 08/21/2013 | CN203145004U Whole pile long steel tube dado synchronous tube sinking and rotary excavating earth borrowing grouting pile |
| 08/21/2013 | CN103256003A Overturning type wellhead testing device |
| 08/21/2013 | CN103256002A Rotary drilling rig and construction method thereof |
| 08/21/2013 | CN103256001A Rotary drilling rig and construction method thereof |
| 08/21/2013 | CN102434091B Rotary drilling rig, power head shock absorption system and shock absorption method thereof |
| 08/14/2013 | CN203130083U Single-head hydraulic drilling rig type coal mining machine |
| 08/14/2013 | CN203129952U Non-excavation horizontal directional drilling machine |
| 08/14/2013 | CN203129950U Automatic circling drilling machine |
| 08/14/2013 | CN203129949U Simple spiral drilling machine |
| 08/14/2013 | CN203129948U Multifunctional cutting drilling machine |
| 08/14/2013 | CN203129946U Power head pedestal of drilling machine |
| 08/14/2013 | CN203129945U Power head of drilling machine |
| 08/14/2013 | CN103244050A Control method for rotary drilling rig to prevent high torque car holding and device thereof |
| 08/14/2013 | CN102322224B Mechanical drill rod |
| 08/13/2013 | US8510081 Drilling scorecard |
| 08/13/2013 | US8505652 Bearing assembly system with integral lubricant distribution and well drilling equipment comprising same |
| 08/07/2013 | CN203114183U Power head installation bracket for raise boring machine |
| 08/07/2013 | CN203114161U Engineering driller hydraulic power head |
| 08/07/2013 | CN203114160U Underground coal mine directional drilling machine big through hole power head with braking function |
| 08/07/2013 | CN203114159U Rotary water-sealing device |
| 08/07/2013 | CN203114158U Fully-revolving casing pipe drilling machine |
| 08/07/2013 | CN203114157U Small-hole type engineering driller |
| 08/07/2013 | CN203114156U All-hydraulic engineering driller |
| 08/07/2013 | CN103233680A Multifunctional drilling machine power head |
| 08/06/2013 | US8499858 Modular top drive lubrication system and methods |
| 08/01/2013 | US20130192895 Device and Method for Drilling with Continuous Tool Rotation and Continuous Drilling Fluid Supply |
| 07/31/2013 | DE202010017993U1 Bohrer und Bohrgerät, insbesondere Erdbohrgerät, mit einem Bohrer Drills and Drill, especially earth boring with a drill |
| 07/31/2013 | CN203098748U Top-drive split type gear case |
| 07/31/2013 | CN203097736U Rope doubling feed mechanism |
| 07/31/2013 | CN203097714U Full-hydraulic underground tunnel drilling machine |
| 07/31/2013 | CN203097707U Full-hydraulic vibration rotation coring power head |