| Patents for E21B 3 - Rotary drilling (4,061) |
|---|
| 07/13/2011 | CN201896585U Pipe-roof drilling rig with synchronous-traversing rotary table |
| 07/13/2011 | CN201896579U Reciprocating outburst prevention drilling rig |
| 07/13/2011 | CN201896578U Outburst prevention drilling rig |
| 07/13/2011 | CN201896577U Wire pole pit boring machine |
| 07/12/2011 | US7975781 Kelly driver |
| 07/12/2011 | US7975771 Method for running casing while drilling system |
| 07/07/2011 | US20110162862 Electric power tool |
| 07/06/2011 | CN201891389U Self mounting/dismounting device of rotary drilling rig |
| 07/06/2011 | CN201891380U Rotary drilling rig and power control box thereof |
| 07/06/2011 | CN201891379U Top driving device of drilling platform |
| 07/06/2011 | CN201890733U Engineering machinery and hoisting device thereof |
| 06/29/2011 | CN201883943U Spiral impact drill bit and engineering machinery comprising same |
| 06/29/2011 | CN201883937U Sand-preventive and deviation-preventive screw drilling rig |
| 06/29/2011 | CN201883936U Rock hole drilling machine for coal mine fully-mechanized working surfaces |
| 06/29/2011 | CN201883935U Pore-forming drill tool for advance support of tunneling works |
| 06/29/2011 | CN201883934U Hydraulic lifting type roof punching machine |
| 06/29/2011 | CN201883428U Bidirectional mixing boring tool for mixing pile machine |
| 06/29/2011 | CN102108854A Automatic anti-overturn control system and control method thereof for rotary drilling rig |
| 06/23/2011 | US20110147092 Hose tensioner for a rock drill system |
| 06/23/2011 | US20110147085 Rotation inhibiting apparatus |
| 06/22/2011 | CN201874458U Full-automatic lifting electric drilling rig |
| 06/22/2011 | CN201874453U Turnplate with simple structure |
| 06/22/2011 | CN201874452U Hydraulic drill part |
| 06/22/2011 | CN201874451U Drilling device of hydraulic drilling machine |
| 06/22/2011 | CN201874450U Outburst-prevention drilling machine used in coal mine |
| 06/22/2011 | CN102102489A Turbine drilling tool bearing block having permanent magnet bearing |
| 06/22/2011 | CN102102488A Eight-drill cross pile pore forming machine |
| 06/22/2011 | CN102102487A Multifunctional hydraulic pile hammer |
| 06/21/2011 | US7963346 Power tool with angle drive and pinion adjustment |
| 06/21/2011 | CA2648681C Top drive apparatus |
| 06/21/2011 | CA2630068C Locking clutch for downhole motor |
| 06/15/2011 | CN201865598U Rotary drilling rig and drilling rod lifting device thereof |
| 06/15/2011 | CN201865587U Rotary drilling rig and mast seat thereof |
| 06/15/2011 | CN201865586U Engineering machinery and mast base thereof |
| 06/15/2011 | CN201865572U Novel rotary drilling rig |
| 06/15/2011 | CN201865571U Small-sized rotary drilling rig |
| 06/15/2011 | CN201865568U Full-hydraulic multifunctional power head |
| 06/15/2011 | CN201865566U Spindle flexing type floating power head of coal-bed gas drill |
| 06/15/2011 | CN201865565U Rotary drilling rig |
| 06/15/2011 | CN201865564U On-board rotary drilling rig |
| 06/15/2011 | CN201865563U Multifunctional rotary drilling rig |
| 06/15/2011 | CN201865134U Salt lake drilling grooving machine |
| 06/15/2011 | CN102094579A Full-hydraulic tire rock drilling anchoring drill carriage |
| 06/15/2011 | CN101580212B Counterweight self-handling device for engineering machinery and rotary drilling rig comprising same |
| 06/15/2011 | CN101424162B Back tong for top-drive drilling unit |
| 06/09/2011 | US20110132665 Electric Horizontal Directional Drilling Machine System |
| 06/09/2011 | US20110132664 Drill mast articulation assembly |
| 06/08/2011 | EP2329094A1 Feed mechanism for drilling systems |
| 06/08/2011 | EP2329092A2 Modular rotary drill head |
| 06/08/2011 | CN201858340U Fixing device of oil cup of speed reducer |
| 06/08/2011 | CN201857901U Telescopic drill rod and cast-in-situ cylinder pile rotary drilling rig utilizing same |
| 06/08/2011 | CN102086755A Continuous oil pipe-based guide high-pressure jet drilling system |
| 06/07/2011 | US7954558 Devices and methods for power control in horizontal directional drilling |
| 06/01/2011 | CN201851101U Experimental measurement platform system applicable to high-power transmission and communication system |
| 06/01/2011 | CN201851010U Rotary drilling rig |
| 06/01/2011 | CN201851007U Screw rotor |
| 06/01/2011 | CN201851006U Device for vertically boring holes on concrete with high precision |
| 06/01/2011 | CN201851005U Construction device of triaxial stirring pile |
| 06/01/2011 | CN201851004U Double-oil cylinder double-lifting arm mechanism of underground drilling machine |
| 06/01/2011 | CN201851003U Drilling bit |
| 06/01/2011 | CN201851002U PLC (Programmable Logic Controller) controlled frequency conversion pile driver |
| 06/01/2011 | CN201851001U Drilling machine for constructing piles with high bearing capacity |
| 06/01/2011 | CN201850548U High-pressure rotary spraying pile driver |
| 06/01/2011 | CN1985066B Apparatus and method for modified horizontal directional drilling assembly |
| 06/01/2011 | CN1791731B Systems and methods using a continuously variable transmission to control one or more system components |
| 05/31/2011 | US7950668 Remote operated actuator system for drill string internal blowout preventer |
| 05/25/2011 | CN201843518U Vehicle-mounted petroleum drill and power head thereof |
| 05/25/2011 | CN201843516U Rotary drilling rig for automobiles |
| 05/25/2011 | CN201843514U Movable pit driller of electric concrete pole |
| 05/25/2011 | CN201843512U Auger drill |
| 05/25/2011 | CN201843511U Driller top-drive rotating head with gear locking device |
| 05/25/2011 | CN201843510U Rotary drilling rig |
| 05/25/2011 | CN201843509U Quick power head lifting device and vehicle-mounted drill using same |
| 05/25/2011 | CN201843508U Long auger drilling machine and automatic soil cleaning device thereof |
| 05/25/2011 | CN201843507U Rotary drilling rig provided with detecting mechanism |
| 05/25/2011 | CN201843506U Multi-functional long spiral rotary drilling rig |
| 05/25/2011 | CN201843132U Large-aperture deep-pile long-auger drilling rig |
| 05/25/2011 | CN201843131U Long auger drilling machine |
| 05/25/2011 | CN201843130U Drilling machine with long auger stem |
| 05/25/2011 | CN201839601U Agricultural hole digger |
| 05/25/2011 | CN101492996B Method for controlling rotate speed torquemoment of top driving device of oil rig |
| 05/19/2011 | WO2011057493A1 Hydraulic system and rotary drilling rig including the same |
| 05/19/2011 | US20110114390 Sleeve arrangement |
| 05/18/2011 | CN201835789U Manual and automatic integral inner blowout preventer with top drive |
| 05/18/2011 | CN201835741U System for direct current electric driven drilling machine with independent rotary table |
| 05/18/2011 | CN201835740U Rotary drilling rig and drilling bucket drop preventing device thereof |
| 05/18/2011 | CN201835739U Screw pile machine power head |
| 05/18/2011 | CN102061892A Rotary drilling rig and drill rod assembly thereof |
| 05/18/2011 | CN101503946B Carriage apparatus capable of enabling damped oscillation of unit head |
| 05/11/2011 | EP2320024A1 Top drive apparatus and method for facilitating removal of an item connected to a main shaft of a top drive |
| 05/11/2011 | EP2318636A1 Precision torque tool |
| 05/11/2011 | CN201826749U Turntable device of rotary drilling rig |
| 05/11/2011 | CN201826748U Device for drilling deep and long gas drainage hole on soft coal seam in bedding way |
| 05/11/2011 | CN201826747U Transverse hydraulic drilling machine |
| 05/11/2011 | CN102052442A Ahead running reduction box with hydraulic torque-converting coupler |
| 05/11/2011 | CN102052363A Controllable low-velocity and large-toque power head motor |
| 05/11/2011 | CN102052055A Dual-power multifunctional rotary drilling rig |
| 05/11/2011 | CN102052054A Hydraulic system of dual-power multifunctional rotary drilling rig |
| 05/11/2011 | CN102052053A Cooling system of dual-power multifunctional rotary drilling rig |
| 05/11/2011 | CN101487375B Performance test method and system for top-driving drilling apparatus |