| Patents for E21B 6 - Drives for drilling with combined rotary and percussive action (930) |
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| 06/05/2013 | CN103140643A Boring machine having head part |
| 05/23/2013 | WO2013072878A1 An impact rock drill |
| 05/22/2013 | CN202946010U Dual-purpose type impacting and rotating anchor rod drilling machine |
| 05/15/2013 | EP2592214A1 Air pressure reused pneumatic hammer drill |
| 05/15/2013 | CN103109033A Radial vibrational apparatus |
| 05/08/2013 | EP2588701A1 Radial vibrational apparatus |
| 05/08/2013 | CN103089146A Engineering driller capable of conducting superfluid concrete grouting pile driving construction on hard rock strata |
| 05/01/2013 | CN103079769A Hydraulic impact mechanism for use in equipment for treating rock and concrete |
| 04/25/2013 | US20130098684 Percussion assisted rotary earth bit and method of operating the same |
| 04/10/2013 | EP2576147A1 Rock drilling machine, removable cartridge, stop ring and drilling rig |
| 04/10/2013 | CN103032023A Rotary-impact crushing head device for screw type pile machine |
| 04/03/2013 | CN103015890A Rotary impact type pneumatic roofbolter |
| 03/27/2013 | CN202832196U Pile sinking lead hole construction machinery for deep and thick high compressibility soft soil clamp riprap layer subgrade |
| 03/27/2013 | CN102996070A Automatic anti-blocking method of down-the-hole drill |
| 03/20/2013 | CN102985230A 钻机 Rig |
| 03/19/2013 | CA2580082C Rock drilling device |
| 03/13/2013 | EP2566665A1 Drilling machine |
| 03/13/2013 | CN202788611U Hydraulic ultra high frequency vibration power head |
| 03/06/2013 | CN101871316B Piling machine |
| 02/20/2013 | CN202745687U Reciprocating impact tunnel drilling machine |
| 02/20/2013 | CN202745686U Impact screw drilling tool |
| 02/20/2013 | CN102937000A Inner-cylinder rotary type hydraulic pressure rock drill |
| 02/14/2013 | US20130037293 Drilling machine |
| 02/13/2013 | CN102926657A Anti-blocking method for hydraulic propulsion circuit of rock drilling machine and rotary circuit in series connection |
| 02/13/2013 | CN102108835B Motor impact transmission shaft |
| 02/06/2013 | CN102913130A Full-hydraulic rock-drilling excavator using hydraulic excavator for production |
| 02/06/2013 | CN102913127A 多功能气动冲击钻 Multifunction pneumatic impact drill |
| 01/30/2013 | CN202708546U Trolley washing head rapid lubrication device |
| 01/30/2013 | CN102905855A Rock drilling machine, removable cartridge, stop ring and drilling rig |
| 01/24/2013 | US20130020133 Multi-axis modulation of cutters |
| 01/10/2013 | WO2012138383A3 Drilling motor valve and method of using same |
| 01/10/2013 | US20130008722 Down-Hole Hammer Drill |
| 01/02/2013 | CN101451423B Drilling tool with dust collector |
| 12/26/2012 | CN102839915A Hydraulic high frequency rotary vibration construction device applicable to dry pneumatic rock drilling pile machine |
| 12/05/2012 | EP2528714A1 Method and arrangement for lubricating drill shank of rock drilling machine |
| 12/05/2012 | CN202578499U Synchronously rotating convolute punching-smashing drilling machine |
| 11/29/2012 | WO2012161596A1 Control mechanism |
| 11/29/2012 | CA2835865A1 Control mechanism |
| 11/22/2012 | WO2012155305A1 Rotary impact type rock drilling machine and double-layer drilling rod mechanism |
| 11/22/2012 | US20120292114 Method and Arrangement for Lubricating Drill Shank of Rock Drilling Machine |
| 11/21/2012 | CN202544742U Percussion drill hammer |
| 11/15/2012 | WO2012154296A1 Downhole rotational vibrator |
| 11/15/2012 | CA2833921A1 Downhole rotational vibrator |
| 11/14/2012 | CN102777122A Impact screw drilling tool |
| 11/14/2012 | CN102776882A Pile driving method with vibrating, rotating and extruding screw pile |
| 11/14/2012 | CN101748969B Hydraulic control loop used for jackdrill and control system thereof |
| 11/07/2012 | CN202520220U Top hydraulic impact drilling machine |
| 11/07/2012 | CN102121350B Impulse type hydraulic rock drill |
| 10/24/2012 | EP2514911A1 Drilling device |
| 10/17/2012 | CN102741017A Method and arrangement for lubricating drill shank of rock drilling machine |
| 10/11/2012 | CA2832212A1 Drilling motor valve and method of using same |
| 10/10/2012 | CN102720430A Coaxial integrated gyration and excitation drive device of drilling tools |
| 09/13/2012 | WO2012120403A1 Mechanical force generator for a downhole excitation apparatus |
| 09/13/2012 | CA2828675A1 Mechanical force generator for a downhole excitation apparatus |
| 09/11/2012 | US8261848 Drilling apparatus |
| 08/15/2012 | CN202380971U Ratchet wheel of rock drilling machine |
| 08/15/2012 | CN102635309A Hammer head of percussion drill |
| 08/07/2012 | CA2623625C Method and rock drilling rig for hole drilling |
| 08/01/2012 | EP2480744A2 Systems and methods for improving drilling efficiency |
| 08/01/2012 | CN101812966B Engineering driller |
| 07/18/2012 | CN202338201U 振动挤压式钻孔机 Vibration extrusion Drills |
| 07/11/2012 | CN202325232U 一种快速成孔钻机 A fast into drilling rig |
| 07/05/2012 | WO2012089949A1 Hydraulic rotary percussion apparatus for boring mine holes |
| 07/05/2012 | CA2808992A1 Hydraulic rotary percussion apparatus for boring mine holes |
| 07/04/2012 | CN102536114A Mechanical underground vibration-absorption punching drilling tool |
| 06/13/2012 | CN202273586U 液压凿岩机液压承冲机构 Hydraulic rock drill hydraulic bearing punch agency |
| 05/31/2012 | WO2012068771A1 Impact-type hydraulic rock drilling machine |
| 05/31/2012 | WO2012044127A3 Punching device having head part |
| 05/30/2012 | CN202249756U Multi-drillbit rotary impacting and smashing engineering grooving machine |
| 05/30/2012 | CN202249755U Multi-functional pneumatic percussion drill |
| 05/30/2012 | CN101831906B Dry type pneumatic rock drilling pile-driving machine and working method thereof |
| 05/23/2012 | CN202227980U Dedicated drilling machine for well drilling once |
| 05/09/2012 | EP2449202A1 Vibrating downhole tool |
| 05/09/2012 | CN202215148U Reciprocating type percussive-rotary drilling tool |
| 05/03/2012 | US20120103692 Method and system for drilling using gas as a drilling fluid |
| 05/02/2012 | CN102434096A Spiral percussion drill |
| 04/26/2012 | US20120097449 Method And Apparatus For Controlling Rock Drilling |
| 04/25/2012 | EP2444587A1 Drive device |
| 04/25/2012 | CN202202804U 一种定向旋转式空气锤 As a directional rotary air hammer |
| 04/25/2012 | CN102425370A 孔底油压马达碎石器组合动力钻具施工方法及装置 Gravel bottom of the hole hydraulic motor combination power drill construction methods and apparatus |
| 04/19/2012 | WO2012049353A1 Drill assembly |
| 04/18/2012 | CN202194567U 一种液压旋转气动冲击凿岩机 A hydraulic rotary pneumatic impact drills |
| 04/18/2012 | CN102418474A 一种往复式冲击旋转钻井工具 A reciprocating impact rotary drilling tool |
| 04/11/2012 | CN102409974A 振动挤压式钻孔机 Vibration extrusion Drills |
| 04/11/2012 | CN102409972A 多钻头回旋冲砸工程开槽机 Multi-bit roundabout punch hit slot machine works |
| 04/05/2012 | WO2012044127A2 Punching device having head part |
| 04/05/2012 | CA2811779A1 Drilling apparatus having head |
| 04/04/2012 | CN102400643A Hydraulic Rotary Punching Device For Perforation |
| 03/28/2012 | CN202176261U 冲击回转钻机 Impact rotary drilling rig |
| 03/28/2012 | CN102392598A Hydraulic vibration impactor and pile driving power head comprising same |
| 03/21/2012 | CN102383727A Drilling machine special for one-step well drilling and working method thereof |
| 03/14/2012 | CN102373881A Hydraulic impact bearing mechanism for hydraulic rock drill |
| 03/08/2012 | WO2012030272A1 Hydraulic impact mechanism for use in equipment for treating rock and concrete |
| 03/08/2012 | CA2809789A1 Hydraulic impact mechanism for use in equipment for treating rock and concrete |
| 02/01/2012 | CN102337839A Directionally rotating type air hammer |
| 01/25/2012 | CN101672158B Jumbolter gyrator capable of vibrating and rotating positively and negatively |
| 01/19/2012 | WO2011149363A4 Enhanced vibrational or hammering apparatus |
| 01/05/2012 | WO2012002827A1 Radial vibrational apparatus |
| 01/05/2012 | CA2803288A1 Radial vibrational apparatus |
| 12/28/2011 | CN202090831U 多功能挖掘机型式动臂折叠液压旋转切削气动冲击钻机 Multifunctional folding hydraulic excavator boom type rotary cutting pneumatic impact rig |