| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
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| 07/30/2013 | US8496410 Method and apparatus for penetrating particulate substrates |
| 07/30/2013 | US8496075 Bearing assemblies, bearing apparatuses using the same, and related methods |
| 07/30/2013 | CA2612285C Novel activating mechanism for controlling the operation of a downhole tool |
| 07/25/2013 | WO2013109786A1 Carbide wear surface and method of manufacture |
| 07/25/2013 | WO2013109412A1 Method and apparatus of distributed systems for extending reach in oilfield applications |
| 07/25/2013 | WO2013106890A1 Dual circulation drilling system |
| 07/25/2013 | WO2013081804A3 Apparatus and methods utilizing progressive cavity motors and pumps with rotors and/or stators with hybrid liners |
| 07/25/2013 | US20130186692 Down-the-hole hammer |
| 07/25/2013 | US20130186691 Bearing assemblies, and bearing apparatuses using the same |
| 07/25/2013 | US20130186689 Downhole tool with external housing torque transfer |
| 07/25/2013 | US20130186662 Progressive Dual-Shaft Drill Head and Systems and Methods Thereof |
| 07/24/2013 | CN203081284U Intelligent hydraulic integrated open-air down-the-hole drill |
| 07/24/2013 | CN103216195A Dual-purpose device for drilling and cleaning well |
| 07/24/2013 | CN103216193A Rectangular hole well drill |
| 07/24/2013 | CN102268962B Oil seal screw drilling tool transmission shaft assembly with pressure compensation function |
| 07/24/2013 | CN101949260B Auxiliary hammer mechanism of percussive hammer capable of releasing after storing energy and energy-storage type percussive hammer |
| 07/18/2013 | WO2013106207A1 Progressive dual-shift drill head and systems and methods thereof |
| 07/18/2013 | WO2013106011A2 Downhole oscillator |
| 07/18/2013 | WO2013043539A3 Well tractor with active traction control |
| 07/18/2013 | US20130180781 Turbine Driven Reaming Bit with Profile Limiting Torque Fluctuation |
| 07/18/2013 | DE10392218B4 Schlagwerk zum Bohren in der Erdölindustrie mit Strömungsmittelantrieb und dessen Verwendung Percussion drilling in the oil industry with fluid drive and use thereof |
| 07/18/2013 | CA2837938A1 Downhole oscillator |
| 07/17/2013 | EP2615239A1 Device and method for drilling shafts in a ground consisting of rock, clay and/or related materials |
| 07/17/2013 | CN203066856U Well drilling moment balancer |
| 07/17/2013 | CN103206169A Rotary cone for all-casing full-rotating drilling machine |
| 07/11/2013 | WO2013103907A1 Pressure activated flow switch for a downhole tool |
| 07/11/2013 | WO2013103677A1 In-riser hydraulic power recharging |
| 07/11/2013 | WO2012143807A3 Downhole assembly with magnetic gearbox |
| 07/10/2013 | CN203050499U Near-bit peripheral resonance impactor |
| 07/10/2013 | CN203050498U Screw drilling tool |
| 07/10/2013 | CN203050497U Rotary device and oil-water well drilling repair dynamic rotary system using same |
| 07/10/2013 | CN103195369A Down-hole hammer |
| 07/10/2013 | CN103195361A Down-hole hammer |
| 07/10/2013 | CN103195360A Self-pressurized well drilling machine |
| 07/10/2013 | CN102392597B Electromechanical integration large-aperture drilling device |
| 07/03/2013 | CN203035473U 动力偏心锤和井下动力工具 Dynamic eccentric weight and downhole tools |
| 07/03/2013 | CN203035438U Shaft bottom engine |
| 07/03/2013 | CN203035077U Liquid carrying core shaft component and down-hole power tool |
| 07/03/2013 | CN203035076U Driller transmission mechanism |
| 07/03/2013 | CN103189589A An attachment for percussion drill tools |
| 07/03/2013 | CN101310088B Hammer drilling device with a pneumatic reversing gear |
| 07/02/2013 | US8474547 Isolation system for drilling systems |
| 06/27/2013 | WO2013095164A1 Extended reach drilling |
| 06/27/2013 | WO2012119837A3 Method and system for well and reservoir management in open hole completions as well as method and system for producing crude oil |
| 06/27/2013 | DE112011103199T5 Vorrichtung und Verfahren zum Bohren von Bohrlöchern Apparatus and method for drilling wellbores |
| 06/26/2013 | CN203022622U Vertical shaft type drill capable of mechanically screwing down drill stem |
| 06/26/2013 | CN103174379A Cyclone high wind pressure down-hole hammer with tail pipe |
| 06/26/2013 | CN103174378A Middle-low air pressure down-hole hammer |
| 06/26/2013 | CN103174133A Pile-forming device and method of steel tube dado super embedded rock filling piles |
| 06/25/2013 | US8469104 Valves, bottom hole assemblies, and method of selectively actuating a motor |
| 06/20/2013 | WO2013090063A1 Downhole tool retainer and guide ring and methods of fabricating the same |
| 06/20/2013 | US20130153301 Lubrication system for a drilling apparatus |
| 06/19/2013 | EP2603706A2 Bearing assembly including bearing support ring configured to reduce thermal warping during use. bearing apparatuses using the same, and related methods |
| 06/19/2013 | EP2603659A2 An attachment for percussion drill tools |
| 06/19/2013 | CN203008792U Anti-falling device for bearing block of high-speed turbodrill |
| 06/19/2013 | CN103161164A Rock-socketed pre-stressed pipe pile for slip casting after spinning drilling rock is planted in pile bottom |
| 06/19/2013 | CN103161163A Prestressed tubular pile for spinning rock drilling and embedding rock socketing |
| 06/19/2013 | CN103161157A Cast-in-place pile capable of conducting tube sinking and rotary excavating earth borrowing synchronously of full pile long steel pipe dado |
| 06/19/2013 | CN103161156A Threaded grouting pile enabling pipeline sinking and rotary excavating earth borrowing to be synchronous |
| 06/19/2013 | CN102199989B Automatic drilling machine without drill rod |
| 06/19/2013 | CN101629473B Wing rib driving mechanism of rotary steering drilling tool |
| 06/18/2013 | US8464807 Electrical hand tool with magnets for absorbing dust |
| 06/18/2013 | CA2563447C Improvements in or relating to rock drilling equipment |
| 06/13/2013 | WO2013085665A1 Ball seat milling and re-fracturing method |
| 06/13/2013 | CA2857125A1 Ball seat milling and re-fracturing method |
| 06/12/2013 | CN202990849U Plane revolution down-hole drill for drilling cutting holes along side wall of bored pile rock shaft |
| 06/12/2013 | CN202990848U Drilling-rod-free geological drilling device |
| 06/11/2013 | US8459372 Voltage sensing drill with automatic shut-off |
| 06/06/2013 | WO2013081804A2 Apparatus and methods utilizing progressive cavity motors and pumps with rotors and/or stators with hybrid liners |
| 06/06/2013 | WO2013032616A4 Downhole motors and pumps with improved stators and methods of making and using same |
| 06/06/2013 | WO2013003151A4 Control of downhole safety devices |
| 06/06/2013 | CA2847831A1 Improved wireline drilling system |
| 06/05/2013 | CN103132923A Integrated high-wind-pressure down-the-hole drill |
| 06/05/2013 | CN103132908A Device for drilling rock and embedding rock-socketed prestressed pipe pile by down-hole hammer and construction method of device |
| 06/05/2013 | CN103132907A Cone down-the-hole mixing drilling tool and cone down-the-hole drill including the same |
| 06/05/2013 | CN103132906A Rotary device and oil-water well drilling and repairing power rotary system utilizing same |
| 06/05/2013 | CN103132904A Anchor rod assisting drilling machine |
| 06/05/2013 | CN101440693B 高温深井螺杆钻具 High temperature deep screw hole |
| 06/04/2013 | CA2541063C Rotopercussion drilling device |
| 05/30/2013 | US20130133952 Attachment for percussion drill tools |
| 05/30/2013 | US20130133950 Apparatus and Methods Utilizing Progressive Cavity Motors and Pumps with Rotors and/or Stators with Hybrid Liners |
| 05/29/2013 | DE102012216105A1 System und Verfahren zur Änderung der Wärmeübertragung bei einem Bohrlochwerkzeug und Verfahren zur Erwärmung eines Bohrlochfluids System and method for altering the heat transfer in a downhole tool and method for heating a wellbore fluid |
| 05/29/2013 | CN202954736U High-performance sand prevention screw drilling tool |
| 05/29/2013 | CN103124830A Method and device for monitoring down-the-hole percussion drilling |
| 05/29/2013 | CN103122750A Driving force underneath type percussion drill |
| 05/29/2013 | CN102386692B Ball filling screw drill stator and processing technology |
| 05/29/2013 | CN102220837B Air distribution anti-swiveling device for combination type down-the-hole hammer reverse circulating method |
| 05/29/2013 | CN102191915B Resonant pulse vibrating drilling device |
| 05/29/2013 | CN102094577B Core valve jet-suction hydraulic down-the-hole (DTH) hammer |
| 05/28/2013 | CA2553236C Downhole drilling of a lateral hole |
| 05/23/2013 | WO2013074865A1 Positive displacement motor with radially constrained rotor catch |
| 05/23/2013 | WO2013074362A1 Formation fracturing |
| 05/23/2013 | WO2013071360A1 Hammer bit shank enhancements |
| 05/23/2013 | WO2012103318A4 Oil-sealed mud motor bearing assembly with mud-lubricated off-bottom thrust bearing |
| 05/23/2013 | CA2855801A1 Formation fracturing |
| 05/23/2013 | CA2855724A1 Positive displacement motor with radially constrained rotor catch |
| 05/22/2013 | EP2593628A2 Two-port percussion mole |
| 05/22/2013 | CN202946009U Hydraulic drive impacter |
| 05/22/2013 | CN103114806A 旋挖钻机 Rotary Drilling Rig |
| 05/22/2013 | CN103114805A Drilling and reaming dual-purpose drilling tool and construction method thereof |