| Patents for E21B 1 - Percussion drilling (2,080) |
|---|
| 08/28/2013 | CN101906936B Hydraulic rock drilling machine of excavator |
| 08/22/2013 | WO2013122531A1 Separate hydraulic unit with cooling of oil |
| 08/14/2013 | CN203129944U Vertical drilling device |
| 08/14/2013 | CN103244049A Operating method for controlling cluster drill of DTH (down-the-hole) hammers and device of cluster drill |
| 08/14/2013 | CN103244048A Pore-forming machine of rectangular bored concrete pile |
| 08/14/2013 | CN103244047A Gravity impact drill |
| 08/14/2013 | CN102839914B Intermediate wind pressure high-speed rock drilling machine |
| 08/10/2013 | CA2803530A1 Method and apparatus for controlling the operation of cluster drill of dth hammers |
| 08/07/2013 | CN103233679A Boring machine with roller |
| 08/07/2013 | CN102134961B Punching pile machine with self-turning prevention function |
| 08/01/2013 | WO2013110982A2 Booster explosive support device |
| 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 |
| 07/17/2013 | EP2614217A1 Improved rock drill |
| 07/17/2013 | CN203066851U Rock drilling rack propelling lead screw |
| 07/17/2013 | CA2802175A1 Down-hole hammer drill |
| 07/16/2013 | US8486084 Surgical slap hammer |
| 07/10/2013 | CN203050486U Hydraulic high-frequency breaking hammer drill capable of drilling at the bottom of a pile driver hole |
| 07/10/2013 | CN203050485U Ground stabilization grouting hammer mill |
| 07/10/2013 | CN103195468A System process for conducting efficient strengthened extraction in surrounding rock |
| 07/03/2013 | CN203035179U Anti-overturning winch-type percussion drill with automatic power-off device |
| 07/03/2013 | CN203035071U Novel air pick |
| 07/03/2013 | CN203035070U Air cylinder |
| 07/03/2013 | CN101529043B Down-the-hole hammer drill |
| 06/27/2013 | WO2013095164A1 Extended reach drilling |
| 06/26/2013 | CN203022627U Percussion drill suitable for construction under complicated conditions of sea areas |
| 06/26/2013 | CN203022618U Punching steel chisel with dismountable spanner |
| 06/26/2013 | CN203022617U Non-torque pore-forming apparatus |
| 06/19/2013 | CN103161400A Electromagnetic impacter |
| 06/19/2013 | CN101435312B Multifunctional hammer drill |
| 06/12/2013 | CN202990841U Free piston type impact drilling system |
| 06/12/2013 | CN103147708A Through type down hole hammer reverse circulation drilling dust collection device |
| 06/11/2013 | US8459751 Percussion tool for a demolishing hammer or the like |
| 06/06/2013 | WO2013081311A1 Air supplying method for cluster hammer having nozzles installed |
| 06/05/2013 | CN202970435U High atmospheric pressure automatic adjustment air-leg type jackdrill |
| 06/05/2013 | CN202970434U Hydraulic rock drill |
| 06/05/2013 | CN202970433U Clamping mechanism for mine drilling tunneling |
| 06/05/2013 | CN202970432U Vertical-shafttype power head of core drill |
| 06/05/2013 | CN202970431U Drilling mechanism for mine rock drilling tunneling |
| 06/05/2013 | CN202970430U Leapfrog-type drilling device |
| 05/28/2013 | US8451136 Sonde attachment means |
| 05/22/2013 | CN202946007U Reinforced punching steel chisel |
| 05/22/2013 | CN202946006U Air pick hammer |
| 05/22/2013 | CN202946005U High-speed impactor |
| 05/15/2013 | CN103109033A Radial vibrational apparatus |
| 05/08/2013 | EP2588701A1 Radial vibrational apparatus |
| 05/08/2013 | CN103097654A Improved rock drill |
| 05/08/2013 | CN103089142A Driving screw rod for drilling rack |
| 05/08/2013 | CN103089141A Handheld pneumatic rock drill |
| 05/08/2013 | CN101967955B Rotation-revolution combined down-hole hammer and construction method thereof |
| 05/02/2013 | WO2013033979A3 Rolling friction impact digging method and rolling friction impact digging machine using said method |
| 05/01/2013 | CN202914162U Pneumatic rock drill |
| 05/01/2013 | CN202913940U Hydraulic rock drill |
| 05/01/2013 | CN202913939U Water-circulating rock impact drill |
| 04/30/2013 | US8430181 Hammer drill |
| 04/24/2013 | CN202900035U Engineering machine big arm with air storage structure |
| 04/24/2013 | CN103061667A Water hammer type well drill |
| 04/24/2013 | CN103061666A No-torque hole forming equipment |
| 04/17/2013 | CN202882751U Improved rock drill hydraulic system based on excavator hydraulic system |
| 04/17/2013 | CN103046870A Percussion drill suitable for construction under complex sea area condition |
| 04/17/2013 | CN103046863A Pneumatic hammer drill with grouting pipe |
| 04/17/2013 | CN103046862A Air pressure recycling type pneumatic hammer drill |
| 04/17/2013 | CN102094575B Breaking mechanism with rotatable drill rod |
| 04/11/2013 | US20130087356 Rock drilling machine, removable cartridge, stop ring and drilling rig |
| 04/03/2013 | CN202850851U Pneumatic rock drill capable of drilling hard rock rapidly |
| 04/03/2013 | CN202850850U Noise and vibration damping device of pneumatic rock drill |
| 03/28/2013 | WO2012165850A3 Fragment scattering protection apparatus for a brake of an excavator |
| 03/28/2013 | DE202013001219U1 Bodenverdrängunghammer mit durchgängiger Öffnung zur Seite Soil displacement hammer with continuous side port |
| 03/27/2013 | CN202832184U Impactor for foam drilling |
| 03/27/2013 | CN202832183U Foam impacter |
| 03/27/2013 | CN102996064A Double-hammer impact puncher |
| 03/27/2013 | CN102996063A Drilling mechanism for mine rock drilling and tunneling |
| 03/27/2013 | CN102155155B Dual-purpose striking-pulling rock-drilling machine |
| 03/20/2013 | CN202810644U Medium-wind pressure high-speed rock drill |
| 03/20/2013 | CN102979452A Leapfrog type hole drilling device |
| 03/14/2013 | WO2013033979A2 Rolling friction impact digging method and rolling friction impact digging machine using said method |
| 03/13/2013 | CN202788599U Rock drilling control system for rock drill |
| 03/13/2013 | CN101949261B Combined down-the-hole hammer and construction method thereof |
| 03/06/2013 | CN102953675A Engineering machinery large arm with gas storage structure |
| 03/05/2013 | US8387487 Tactical entry tool |
| 02/28/2013 | US20130048382 All Electric Powered Mobile Jumbo Drill Machine |
| 02/27/2013 | EP2561170A1 Air compressor system and method of operation |
| 02/27/2013 | CN202755890U Walking type double circling downhole drill |
| 02/27/2013 | CN202755885U Improved pneumatic percussion drill |
| 02/27/2013 | CN202755884U Hydraulic driving impactor with continuously-adjusted frequency |
| 02/27/2013 | CN202755883U Improved electric rock drill |
| 02/27/2013 | CN102943616A Power head of vertical shaft type rock core drilling machine |
| 02/26/2013 | US8381829 Battery pack and cordless tool using the same |
| 02/20/2013 | CN202745682U Large-diameter DTH (down the hole) hammer impactor |
| 02/20/2013 | CN102936998A 自由活塞式冲击钻井系统 Free-piston impact drilling system |
| 02/19/2013 | US8376659 Arctic platform method |
| 02/13/2013 | CN102108835B Motor impact transmission shaft |
| 02/06/2013 | EP2552652A1 Rock drilling machine and use thereof for hindering occurrence and spreading of cavitation bubbles |
| 02/06/2013 | CN102913121A Flexible swing pipe vibrator boring machine |
| 01/30/2013 | CN202707030U Automation device of percussion drill |
| 01/30/2013 | CN202706904U Hydraulic pulsating impactor |
| 01/30/2013 | CN202706903U Noise reduction damping device of jackdrill |
| 01/30/2013 | CN102900355A Quick-drill pneumatic hard rock drill |
| 01/30/2013 | CN102900354A Hydraulic superhigh-frequency vibrating power head |
| 01/29/2013 | US8360155 Equalizer stopple fitting with integral pressure equalization fitting |
| 01/23/2013 | CN202691011U Impact piston and hydraulic breaking hammer using the same |