| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
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| 08/24/2011 | CN201943572U 动力水龙头 Power taps |
| 08/24/2011 | CN201943568U 一种打桩孔装置 One kind of piling hole means |
| 08/23/2011 | CA2516507C Sleeve piston fluid motor |
| 08/18/2011 | US20110198129 Method and drilling apparatus for down-the-hole drilling |
| 08/18/2011 | US20110198125 Percussive driving apparatus for environmental sampling or test device |
| 08/17/2011 | CN201934016U 一种潜孔冲击器 One kind DTH hammer |
| 08/17/2011 | CN201934015U 石油钻机电气传动系统 Oil rig PDSs |
| 08/17/2011 | CN1926304B Downhole drilling of a lateral hole |
| 08/17/2011 | CN102155158A Jet rotor |
| 08/11/2011 | WO2011096842A1 Reduction gear for a downhole motor |
| 08/11/2011 | WO2011058296A3 Stator inserts, methods of fabricating the same, and downhole motors incorporating the same |
| 08/11/2011 | WO2011058295A3 Stators for downhole motors, methods for fabricating the same, and downhole motors incorporating the same |
| 08/11/2011 | WO2011058294A3 Stators for downhole motors, methods for fabricating the same, and downhole motors incorporating the same |
| 08/11/2011 | US20110192650 Percussion drilling assembly having a floating feed tube |
| 08/11/2011 | US20110192648 Bearing Assembly for Downhole Motor |
| 08/10/2011 | EP1455635B1 Self-advancing device |
| 08/10/2011 | CN201924828U 多功能试验机用双向动力水龙头装置 Multifunction tester with two-way power swivel device |
| 08/10/2011 | CN201924827U 整体式露天潜孔钻机 Integral open hole drill |
| 08/10/2011 | CN102146769A Manufacture method for machining equivalent-thickness rubber inner jacket layer threaded rod drilling tool stator and device thereof |
| 08/09/2011 | US7992652 Fluid distributor cylinder for percussive drills |
| 08/04/2011 | WO2011056518A3 Control device, oil well with device and method |
| 08/03/2011 | EP2350420A1 Rock drilling device |
| 08/03/2011 | CN201915846U 一种钻头加速器 A drill Accelerator |
| 08/03/2011 | CN201915830U 一种立轴式钻机的回转器 A vertical shaft rig Rotator |
| 08/03/2011 | CN201915823U 一种双向气动潜孔锤 A two-way DTH |
| 08/02/2011 | US7987930 Drill bit assembly for fluid-operated percussion drill tools |
| 08/02/2011 | CA2712738A1 Improvement in helical gear sets |
| 08/01/2011 | CA2692995A1 A system and method for induction heating a helical rotor using a coil |
| 07/28/2011 | WO2011090858A1 Flow regulator for downhole progressing cavity motor |
| 07/28/2011 | WO2011062925A3 Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly |
| 07/28/2011 | US20110180329 Systems and methods for providing a gearless drilling turbine |
| 07/28/2011 | US20110180328 Speed control baffle for use in a hydraulic-rotary drilling system |
| 07/28/2011 | US20110180324 Sensor on a Formation Engaging Member of a Drill Bit |
| 07/27/2011 | CN201908566U Electric auger boring type bailing tool for oil gas borehole |
| 07/27/2011 | CN102134965A Long positioned drill hole drilling tool for extracting gas from coal seam roof and construction method thereof |
| 07/26/2011 | US7984769 Method and a device for directional control of a rock drilling machine |
| 07/21/2011 | US20110174544 Bearing Assemblies, Bearing Apparatuses Using the Same, and Related Methods |
| 07/21/2011 | US20110174542 Tubular member adaptor apparatus |
| 07/20/2011 | EP2344294A2 Spindle drive systems and methods |
| 07/20/2011 | CN201902249U Muffler on anchor rod drilling machine |
| 07/20/2011 | CN201902217U Pressure adjusting device on anchor rod drill machine |
| 07/20/2011 | CN201902163U Flexible shock-absorbing transmission shaft assembly of spiral drilling rig |
| 07/20/2011 | CN201902162U Bimetal oil distribution sleeve for full hydraulic drilling machine |
| 07/14/2011 | WO2011084040A2 The method of sealing of moving elements and the device for its realization |
| 07/14/2011 | US20110170320 Transmitting electric power into a bore hole |
| 07/14/2011 | US20110168447 Reaming tool |
| 07/13/2011 | CN201896583U Hold angle type hydraulic rotary-percussion device |
| 07/13/2011 | CN201896582U Bit-free tail pipe of drill bit arranged on high-air-pressure downhole impactor with valve |
| 07/13/2011 | CN201896581U Hydraulic cylinder arm turning device of downhole drill |
| 07/13/2011 | CN201896580U Speed reducing device of gyrator of downhole drill |
| 07/12/2011 | US7975784 Drill bit assembly for fluid-operated percussion drill tools |
| 07/12/2011 | US7975780 Adjustable downhole motors and methods for use |
| 07/07/2011 | WO2011082302A2 Drive pin support |
| 07/07/2011 | WO2011081621A1 Timed impact drill bit steering |
| 07/07/2011 | WO2011080292A1 Downhole guiding tool |
| 07/07/2011 | CA2785939A1 Downhole guiding tool |
| 07/07/2011 | CA2785817A1 Drive pin support |
| 07/07/2011 | CA2781353A1 Timed impact drill bit steering |
| 07/06/2011 | EP2341211A1 Downhole guiding tool |
| 06/30/2011 | US20110155467 Timed impact drill bit steering |
| 06/29/2011 | EP2337919A1 Drilling apparatus |
| 06/29/2011 | EP2337918A1 Method and drilling apparatus for down-the-hole drilling |
| 06/29/2011 | CN201883943U Spiral impact drill bit and engineering machinery comprising same |
| 06/29/2011 | CN201883941U Novel submersible drilling machine |
| 06/29/2011 | CN201883937U Sand-preventive and deviation-preventive screw drilling rig |
| 06/23/2011 | WO2011030095A3 Valves, bottom hole assemblies, and methods of selectively actuating a motor |
| 06/23/2011 | US20110147091 Downhole motor |
| 06/23/2011 | US20110147086 Downhole tools with electro-mechanical and electro-hydraulic drives |
| 06/23/2011 | US20110147084 Method and an arrangement for controlling a rock drill |
| 06/22/2011 | EP2334890A1 An apparatus and method for cutting a wellbore |
| 06/22/2011 | CN201874455U Pneumatic luoyang shovel |
| 06/22/2011 | CN201874454U Piston of down-hole impactor |
| 06/22/2011 | CN102102489A Turbine drilling tool bearing block having permanent magnet bearing |
| 06/22/2011 | CN101713198B Method and equipment for repairing flaws of clamped sand, splits and defect sites of underground building curtain |
| 06/16/2011 | WO2011022580A3 Zero backlash downhole setting tool and method |
| 06/15/2011 | EP2331784A1 Locking clutch for downhole motor |
| 06/15/2011 | CN201865726U Oil removing motor silencer of pneumatic anchor rod drilling machine |
| 06/15/2011 | CN201865567U Hole bottom impactor |
| 06/15/2011 | CN201865099U Automatic impact controller of winch impact pore-forming pile machine |
| 06/15/2011 | CN1926333B Hydraulic motor arrangement and method of operating a hydraulic motor |
| 06/15/2011 | CN102094577A Core valve jet-suction hydraulic down-the-hole (DTH) hammer |
| 06/14/2011 | CA2545377C Downhole motor with a continuous conductive path |
| 06/09/2011 | WO2011068842A2 Grip enhanced tractoring |
| 06/09/2011 | WO2011067360A1 Device for removing or replacing cables |
| 06/09/2011 | WO2011022574A3 Zero backlash downhole setting tool and method |
| 06/08/2011 | EP2201206B1 Shaft seal for down-hole tools |
| 06/08/2011 | CN201857895U Single large-diameter pneumatic DTH (down the hole) hammer |
| 06/08/2011 | CN1748073B Downhole tool |
| 06/08/2011 | CN102086755A Continuous oil pipe-based guide high-pressure jet drilling system |
| 06/08/2011 | CN102086753A Down-hole drill (DHD) gyrator |
| 06/07/2011 | US7954563 Roller link toggle gripper and downhole tractor |
| 06/07/2011 | US7954562 Expandable ramp gripper |
| 06/07/2011 | CA2642724C Downhole assembly releasable connection |
| 06/03/2011 | WO2011065891A1 Filter and method for filtration of hydraulic oil in a return line to a hydraulic tank, and a drilling rig comprising the filter |
| 06/03/2011 | WO2011016005A4 Bit assembly for a down-the-hole hammer drill |
| 06/02/2011 | US20110127086 Helical drilling apparatus, systems, and methods |
| 06/01/2011 | CN201851101U Experimental measurement platform system applicable to high-power transmission and communication system |
| 06/01/2011 | CN201851054U Reverse circulation percussion hammer |
| 06/01/2011 | CN201851019U Anti-run drill |
| 06/01/2011 | CN201851009U Simultaneous casing drilling tool connecting device |