| Patents for E21B 3 - Rotary drilling (4,061) |
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| 05/03/2007 | DE112005001440T5 Umbausatz für eine modulare Steuerungsvorrichtung für ein Schlagwerkzeug Conversion kit for a modular control apparatus for an impact tool |
| 05/02/2007 | CN2895692Y Lead-changeable screw-thread pile machine |
| 05/02/2007 | CN2895691Y Multiplicative propelling structure of anchoring-rod drilling machine |
| 04/25/2007 | CN2893120Y Light earth boring machine |
| 04/25/2007 | CN2893119Y Backpack earth boring machine |
| 04/25/2007 | CN2893118Y Hydraulic drilling machine operating table |
| 04/24/2007 | US7207394 Intermediate and assembly assistance components for fluid driven tools and tools incorporating the same |
| 04/19/2007 | WO2007044714A1 Mechanically modified filter cake |
| 04/19/2007 | CA2624432A1 Mechanically modified filter cake |
| 04/18/2007 | CN2890308Y Connection base suitable for rotary drilling rig power unit |
| 04/18/2007 | CN2890307Y Portable wave detector drilling machine |
| 04/18/2007 | CN1948697A Multifunction rotary disc speed reducing box |
| 04/18/2007 | CN1948696A Airborne anchor rod drilling machine |
| 04/18/2007 | CN1948695A Hand held direct driving type ultra light drilling machine |
| 04/12/2007 | CA2780097A1 Top drive drilling system and other applications using a low speed direct drive ac motor |
| 04/11/2007 | CN1944939A Separable driving type sleeve screw drilling rig and its construction method |
| 04/11/2007 | CN1944937A Submersible reverse circulation engineering drilling rig |
| 04/05/2007 | DE202007001858U1 Antriebsanordnung für ein Doppelbohrgestänge Drive assembly for a Doppelbohrgestänge |
| 04/04/2007 | CN2886051Y Anchor rod recovery apparatus |
| 04/04/2007 | CN2886050Y Drilling machine |
| 04/03/2007 | US7198098 Mechanical connection system |
| 04/03/2007 | CA2346880C Drilling method |
| 03/28/2007 | CN2883645Y Slide rod type power unit of horizontal directional drill |
| 03/21/2007 | EP1421252B1 Washpipe assembly |
| 03/21/2007 | CN2881055Y Coal drilling power head for emulsion drilling machine |
| 03/21/2007 | CN2881054Y Wet type dust eliminating system of diving hole drilling machine |
| 03/20/2007 | US7191839 Drilling rig apparatus and downhole tool assembly system and method |
| 03/15/2007 | WO2007028238A1 Method of breaking brittle solids |
| 03/15/2007 | CA2621259A1 Method of breaking brittle solids |
| 03/14/2007 | CN2878647Y Drilling machine |
| 03/14/2007 | CN2878646Y Security protector for self-running earthquake drill |
| 03/14/2007 | CN1928317A Low tunnel rockbolt anchorage cable pneumatic drilling machine |
| 03/13/2007 | US7188686 Top drive systems |
| 03/13/2007 | US7188683 Drilling method |
| 03/07/2007 | CN1924281A Full-hydraulic multifunctional driller for gas extraction, drainage and discharge |
| 03/07/2007 | CN1924280A Chuck and water swivel integrated apparatus for gas pump drainage and discharge full hydraulic driller |
| 03/07/2007 | CN1303308C Earth auger of making concrete pile |
| 03/01/2007 | WO2007024757A2 Remotely operable top drive system safety valve having dual valve elements |
| 03/01/2007 | WO2007024128A1 Apparatus for gripping a downhole tubular |
| 02/28/2007 | EP1756390A2 System for directional boring including a drilling head with overrunning clutch and method of boring |
| 02/22/2007 | US20070039759 Mud saver valve |
| 02/22/2007 | US20070039758 Remotely operable top drive system safety valve having dual valve elements |
| 02/21/2007 | EP1753932A2 Top drive |
| 02/21/2007 | CN2871788Y Movable core driller |
| 02/21/2007 | CN2871787Y Power head of driller |
| 02/21/2007 | CN1916412A Composite hydraulic energy saving control system |
| 02/15/2007 | CA2757380A1 Surface communication apparatus and method for use with drill string telemetry |
| 02/14/2007 | EP1752607A2 Washpipe assembly |
| 02/14/2007 | EP1751390A2 Apparatus and method for modified horizontal directional drilling assembly |
| 02/13/2007 | US7174973 Power tool interface |
| 02/07/2007 | CN2866783Y Antiskiding pad for drilling machine rotary table |
| 02/07/2007 | CN2866782Y Slip casting screw pile drilling machine |
| 02/07/2007 | CN1298937C Technical method for pouring reinforced concrete pipe pile in large diameter on location and equipment |
| 01/31/2007 | CN2864064Y Tapered arc gear drive type rotary disc using for drilling ram machine |
| 01/24/2007 | CN2861447Y Earthquake dry well drill |
| 01/24/2007 | CN1296598C Rope salvaging type debris-discharge repetition-free drilling and forming hole method and machine tool |
| 01/17/2007 | CN2858923Y Electro-hydraulic proportion pressuring device for rotary digger |
| 01/10/2007 | CN2856570Y Smart controllable, air controlled gear clutch |
| 01/10/2007 | CN2856373Y Rock driller with coaxial core wire |
| 01/10/2007 | CN1294335C Multi-drilling bit high-speed rotary punching apparatus |
| 01/04/2007 | WO2007001732A2 Track-mounted drilling machine with active suspension system |
| 01/04/2007 | DE102005030066A1 Drilling machine for drilling into the ground comprises a first drive for rotating a first drilling column about its own axis and a second drive for rotating a second drilling column about its own axis |
| 01/03/2007 | CN1888371A Drilling machine with supporting frame |
| 01/03/2007 | CN1888370A Concrete drilling hole machine with friction sheet |
| 12/28/2006 | US20060289205 Track-mounted drilling machine with active suspension system |
| 12/27/2006 | CN1884785A Gantry type self-walking roofbolter |
| 12/21/2006 | WO2005121493A9 Top drive |
| 12/21/2006 | WO2005084246A3 Safemode operating system for a drilling or service rig |
| 12/20/2006 | CN2849114Y Micro man power drill for exploration |
| 12/14/2006 | US20060278435 Automated, low profile drilling/bolting module with collaring |
| 12/13/2006 | CN2846874Y 平面推力轴承 Thrust Bearings |
| 12/13/2006 | CN1877073A Side wall boring process for pipeline, water source well, geothermal well and petroleum extraction well, and boring machine therefor |
| 12/06/2006 | CN2844438Y Controller of spiral extruding pile |
| 12/06/2006 | CN2844389Y Demodulator driller underwell |
| 12/05/2006 | US7143845 Drilling apparatus with anti-vibration inertial body |
| 11/29/2006 | EP1725735A1 Boring system and method therefor |
| 11/29/2006 | CN2841933Y Hand-held water-controlled air coal drill |
| 11/29/2006 | CN1869395A Automatic hole drilling apparatus for hand water drill |
| 11/28/2006 | US7140445 Method and apparatus for drilling with casing |
| 11/28/2006 | CA2431824C Continuous feed drilling system |
| 11/22/2006 | CN2839542Y Boring machine for foundation boring pile construction |
| 11/22/2006 | CN1285825C Radiation well horizontal radiation pipe full hydraulic construction equipment |
| 11/15/2006 | CN2837616Y Belt compounding transmission device for petroleum drill rig |
| 11/15/2006 | CN2837609Y Multifunctional turntable speed reducing case |
| 11/15/2006 | CN2837490Y Integrated leakage-free slurry basket |
| 11/14/2006 | US7134509 Portable power tool with rotating output shaft and overload protection |
| 11/08/2006 | CN2835553Y Automatic braking device of hydraulic rotary table for oilfield |
| 11/01/2006 | CN2833107Y Hydraulic device for excavator and jumbolter |
| 11/01/2006 | CN2833088Y Multi-direction high-pressure rotary-jetting drilling device |
| 10/25/2006 | CN1281845C System for carrying well equipment in the well |
| 10/25/2006 | CN1281844C Drilling and reaming machine |
| 10/19/2006 | WO2005110020A3 Apparatus and method for modified horizontal directional drilling assembly |
| 10/18/2006 | CN1280515C Hole drilling equipment and method |
| 10/17/2006 | US7121362 Electrical hand tool with a position adjustable battery pack |
| 10/11/2006 | CN1844638A Damper for non-excavating construction |
| 10/10/2006 | US7120565 Method and apparatus for determining figure |
| 10/10/2006 | CA2225050C Arrangement for a telescope feeder of a rock-drilling machine |
| 10/04/2006 | CN2823525Y Controlling mechanism for joint operating box of drilling machine |
| 10/04/2006 | CN1840854A Apparatus and method for pressure-held drilling and grooving of outburst coal bed |
| 10/04/2006 | CN1278011C Method, system and device for controlling drilling tools an horizontal drilling machine |