| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 09/25/2013 | CN203213952U Transmission mechanism with double inputs |
| 09/25/2013 | CN203213175U A multifunctional working machine |
| 09/25/2013 | CN103328756A Method, system and apparatus for deployment of umbilicals in subsea well operations |
| 09/25/2013 | CN103328755A 定向钻井 Directional drilling |
| 09/25/2013 | CN103321576A Tubular column lowering power tractor with well grinding and repairing function |
| 09/25/2013 | CN103321575A Coal seam top/bottom plate penetrating-hole short-radius deflecting rotary drilling process |
| 09/25/2013 | CN103321574A Square-hole drilling machine |
| 09/25/2013 | CN103321573A Rectangular hole drilling machine |
| 09/25/2013 | CN103321572A Air drilling high-low pressure switching manifold device |
| 09/25/2013 | CN102061882B Multifunctional self-propelled tower-machine integrated core drill machine |
| 09/25/2013 | CN101942963B Vehicle hydraulic drill |
| 09/25/2013 | CN101910546B Method and equipment for small-charge blasting |
| 09/25/2013 | CN101715505B Arrangement for employing drill steel centralizer travelling on feed beam of rock drill machine |
| 09/24/2013 | US8540035 Extendable cutting tools for use in a wellbore |
| 09/24/2013 | US8540031 Encapsulating device |
| 09/24/2013 | US8540029 System and apparatus for drilling riser conduit clamp |
| 09/24/2013 | CA2737504C Drilling stabilizer |
| 09/24/2013 | CA2460788C Magnetic field enhancement for use in passive ranging |
| 09/23/2013 | CA2783923A1 Improvements in or relating to log inversion |
| 09/19/2013 | WO2013137845A1 Method and apparatus for acoustic noise isolation in a subterranean well |
| 09/19/2013 | WO2013135391A2 Method and apparatus for introducing or sinking cavities in rock |
| 09/19/2013 | US20130240268 Controllable deflection housing, downhole steering assembly and method of use |
| 09/18/2013 | EP2639399A1 Fast moving drilling rig |
| 09/18/2013 | EP2638233A2 Tools for use in subterranean boreholes having expandable members and related methods |
| 09/18/2013 | EP2638232A1 Method and device for establishing a borehole in the seabed |
| 09/18/2013 | EP2638231A1 Controlled hydrostatic pressure completion system |
| 09/18/2013 | CN203201469U Integrated window-opening sidetracking tool |
| 09/18/2013 | CN203201468U Device for drilling support push rod |
| 09/18/2013 | CN203201467U Steering tool for jet drilling radial well through hydraulic-controlled hollow spherical joint connection |
| 09/18/2013 | CN203201466U Rotary supporting mechanism of omnibearing multi-angle rotary type anchor drill carriage |
| 09/18/2013 | CN203201465U Omnibearing multi-angle rotary type anchor drill carriage |
| 09/18/2013 | CN203201464U Drill jumbo protective device |
| 09/18/2013 | CN203201463U Walking assembly of engineering driller |
| 09/18/2013 | CN203201462U Short-distance crawling mechanism of drilling machine |
| 09/18/2013 | CN203200749U Recombination stirring drilling tool for repairing, strengthening and stabilizing foundation |
| 09/18/2013 | CN103306713A Networking reinforcement method for cross drilling holes of outburst coal seam |
| 09/18/2013 | CN103306605A Double-pipe fast connecting and dust collecting device for drilling of air casting pipe and applications of double-pipe fast connecting and dust collecting device |
| 09/18/2013 | CN103306604A Multifunctional running casing grouting device for well drilling |
| 09/18/2013 | CN103306603A Device and method for underground continuous wall unit slot hole rectification |
| 09/18/2013 | CN103306602A Hydraulic-expansion recyclable whipstock for directional drilling of underground coal mine and operation method thereof |
| 09/18/2013 | CN103306601A Cross-type power head of drilling machine |
| 09/18/2013 | CN102278065B Rotating steering tool, deflection mechanism thereof and control method for deflection mechanism |
| 09/18/2013 | CN102121394B Method for uncovering outburst coal seam by using pseudo lithosphere on laneway |
| 09/18/2013 | CN102027185B Method for determining dead zone of valve |
| 09/17/2013 | US8534385 Steering head |
| 09/17/2013 | US8534384 Drill bits with cutters to cut high side of wellbores |
| 09/17/2013 | US8534380 System and method for directional drilling a borehole with a rotary drilling system |
| 09/17/2013 | US8534365 Apparatus and method for undersea oil leakage containment |
| 09/17/2013 | US8534363 Methods and devices for restoring control and resuming production at an offshore oil well following an uncontrolled fluid release after an explosion |
| 09/17/2013 | CA2706590C Drilling system |
| 09/17/2013 | CA2682341C Sound dampening housing for rock drill |
| 09/17/2013 | CA2632634C Adjustable angle drive connection for a down hole drilling motor |
| 09/13/2013 | CA2808674A1 Controllable deflection tool, downhole steering assembly and method of use |
| 09/12/2013 | WO2013134265A1 Offshore system with subsea riser |
| 09/12/2013 | WO2013134254A1 Floating structure and riser systems for drilling and production |
| 09/12/2013 | WO2012165954A3 Land based earth boring system |
| 09/12/2013 | WO2011160027A8 Oil operated rotary steerable system |
| 09/12/2013 | US20130233625 Powered Auger Support Assembly for a Vehicle |
| 09/12/2013 | US20130233624 Drilling apparatus having head |
| 09/12/2013 | US20130233547 Subsea casing drilling system |
| 09/12/2013 | DE102012004762A1 Device for expanding bore hole up to large diameter, has delivery line extending from region of cutting wheel inside machine pipe, and outlet located in rear portion of machine pipe, where support plate is connected with machine pipe |
| 09/11/2013 | EP2635768A1 Method and apparatus for coupling an earth pipe into the ground, using a solidifying mass. |
| 09/11/2013 | EP2635762A2 Redundant position reference system for multilateral exit construction and method for use of same |
| 09/11/2013 | EP2635761A1 Rock drilling rig and method for transmission of rock drilling rig |
| 09/11/2013 | EP2635760A1 Drilling device for use especially during directional drilling for recovery of geothermal energy |
| 09/11/2013 | EP2527539B1 Submarine drilling assembly and method for inserting a foundation element into the soil of a body of water |
| 09/11/2013 | CN203188909U Hydraulic power impulse tool capable of improving drilling speed |
| 09/11/2013 | CN203188908U Integrated ground source heat hole power excavating device |
| 09/11/2013 | CN203188907U Load analog device of rotary drilling rig |
| 09/11/2013 | CN203188906U Rapid entering-rock type rotary drilling rig |
| 09/11/2013 | CN203188905U Multi-functional drill carriage |
| 09/11/2013 | CN203188904U Drilling machine for non-excavation construction |
| 09/11/2013 | CN203188203U Thread filling pile capable of synchronously sinking pipeline and rotatably excavating and borrowing soil |
| 09/11/2013 | CN103299021A Flex joint for downhole drilling applications |
| 09/11/2013 | CN103299020A Method and system for steering a directional drilling system |
| 09/11/2013 | CN103291219A Drilling and punching integrated hydraulic drill bit |
| 09/11/2013 | CN103291218A Device and method for improving rate of mechanical penetration of directional deflecting section |
| 09/11/2013 | CN103291217A Fixing mechanism for riveting device for horizontal directional drilling machine |
| 09/11/2013 | CN103291216A Orientation system for horizontal drill of deep-hole drill carriage |
| 09/11/2013 | CN103291215A Drive device and method for driving a drill rod |
| 09/11/2013 | CN103291209A Single-crank-arm surpassing percussion drill and application method |
| 09/10/2013 | US8528664 Downhole mechanism |
| 09/10/2013 | US8528646 Broken pipe blocker |
| 09/10/2013 | US8528644 Apparatus and method for milling casing in jet drilling applications for hydrocarbon production |
| 09/10/2013 | US8528643 Wellbore laser operations |
| 09/06/2013 | WO2013130092A1 Perforating apparatus and method having internal load path |
| 09/06/2013 | WO2012148807A3 Mechanically actuated casing drive system tool |
| 09/05/2013 | US20130228379 Continuous rotary drilling system and method of use |
| 09/05/2013 | US20130228377 Rock drilling rig and method for transmission of rock drilling rig |
| 09/05/2013 | US20130228375 Navigation system |
| 09/05/2013 | US20130228372 High power laser perforating and laser fracturing tools and methods of use |
| 09/05/2013 | US20130228371 Rig with clog free high volume drill cutting and waste processing system |
| 09/04/2013 | CN203175415U Improved drilling machine for trenchless construction |
| 09/04/2013 | CN203175409U Mine drilling machine |
| 09/04/2013 | CN203175399U Underground full-displacement pressurizing device |
| 09/04/2013 | CN203175398U Frame structure for coal mine hydraulic drilling rig |
| 09/04/2013 | CN203175397U Integrated front-back sliding mechanism for multifunctional hydraulic anchor rod drill carriage |
| 09/04/2013 | CN203175396U Multifunctional hydraulic anchor rod drill carriage |
| 09/04/2013 | CN203175395U Left-right swinging mechanism for multifunctional hydraulic drilling rig drill boom |
| 09/04/2013 | CN203175390U Dual-power hydraulic well drill jacking driving device |