| Patents for E21B 1 - Percussion drilling (2,080) |
|---|
| 04/06/2011 | EP1545839B1 Sonic drill |
| 04/05/2011 | CA2511586C Rock drilling machine and axial bearing |
| 03/30/2011 | CN101993014A Automatic ground punching hoist |
| 03/30/2011 | CN101275458B Reverse circulation construction technique and apparatus of single rope impact drill |
| 03/16/2011 | CN201763231U Hydraulic rock drilling gun of stabilizing cylinder without nitrogen |
| 03/15/2011 | US7905300 Drilling device and drilling method utilizing dual drives |
| 03/08/2011 | CA2458124C A power transmission mechanism, a fluid-driven impactor and its use |
| 03/03/2011 | WO2010137826A3 Hydraulic breaker |
| 03/02/2011 | EP2032795B1 Device for channeling solids and fluids within a reverse circulation drill |
| 02/22/2011 | US7891437 Method for breaking rock |
| 02/16/2011 | CN101975022A Post-positioned jumbolter of impact mechanism |
| 02/10/2011 | US20110031018 Horizontal drilling system |
| 02/09/2011 | CN201738801U Subgrade hole puncher |
| 02/09/2011 | CN101967955A Rotation-revolution combined down-hole hammer and construction method thereof |
| 02/09/2011 | CN101967952A Fall prevention device for torsional impacter |
| 02/02/2011 | CN201730547U Multifunctional rapid drilling machine |
| 02/02/2011 | CN1982645B Device used by penetration components for hammering sampler into drilling hole soil |
| 02/01/2011 | US7878263 Pressure-fluid-operated percussion device |
| 02/01/2011 | US7878250 System and method for automating or metering fluid recovered at a well |
| 01/26/2011 | CN101956531A Underground horizontal drilling combined drilling tool of oil well drilling platform |
| 01/26/2011 | CN101956530A Underground horizontal bore drilling tool used for petroleum drilling |
| 01/26/2011 | CN101500762B Percussion device, drilling machine including such a percussion device and method for controlling such a percussion device |
| 01/19/2011 | CN101949261A Combined down-the-hole hammer and construction method thereof |
| 01/12/2011 | CN201705198U Pneumatic impactor |
| 01/12/2011 | CN201705197U Jet pulse generator and rammer device thereof |
| 01/12/2011 | CN201705196U Arc-shaped track traveling device of impact drill |
| 01/06/2011 | WO2011000033A1 Drill head assembly |
| 01/06/2011 | US20110000695 Pulse generating device and a rock drilling rig comprising such a device |
| 01/05/2011 | CN201695939U Novel high-insulation electric rock drill |
| 01/05/2011 | CN101570971B Rock mass pile foundation pore-forming preboring construction method |
| 12/29/2010 | CN101932788A Buffer device of excitation device |
| 12/23/2010 | WO2010145005A1 Air hammer optimization using acoustic telemetry |
| 12/15/2010 | CN201671532U Efficient energy-saving impactor |
| 12/15/2010 | CN201671531U 一种工程冲击钻机 An engineering Percussion Drill |
| 12/15/2010 | CN101535004B Rock drilling method and rock drilling machine |
| 12/15/2010 | CN101457633B Independence control hydraulic impactor for piston displacement electric feedback load port |
| 12/15/2010 | CN101158265B Jet flow type shocker executing mechanism |
| 12/08/2010 | CN101906940A Impacting head assembly for ground drills |
| 12/08/2010 | CN101906936A Hydraulic rock drilling machine of excavator |
| 12/08/2010 | CN101906931A High-order elliptic surface connection and drilling machine propelling mechanism using same |
| 12/08/2010 | CN101262163B An electric harmonic reciprocating line motion impact device |
| 12/02/2010 | WO2010137826A2 Hydraulic breaker |
| 11/30/2010 | US7841424 Power output mechanism for power tools |
| 11/24/2010 | CN201651727U Oil plug used for the rock drill oil filler |
| 11/24/2010 | CN201651719U Oiling machine for rock drilling machine |
| 11/24/2010 | CN201651270U Clutch-piston type damping positioner for engineering impact drill |
| 11/18/2010 | WO2010098557A3 Hydraulic breaker with automatic grease supply |
| 11/18/2010 | US20100288521 Vibration hammer |
| 11/18/2010 | US20100288519 Method and device for rock drilling |
| 11/10/2010 | CN101370621B Percussion device and rock drilling machine including such a percussion device |
| 11/03/2010 | CN201620753U Rock drilling machine |
| 11/02/2010 | US7824132 Automatically adjustable caisson clamp |
| 10/27/2010 | EP2242894A2 Vibration hammer |
| 10/27/2010 | CN201614883U 高气压气腿式凿岩机 High pressure air leg rock drill |
| 10/21/2010 | WO2010068751A3 Vibratory drill head mounting and rotation coupling system |
| 10/21/2010 | US20100263932 Bit retainer assembly for a down-hole drill |
| 10/20/2010 | CN101864892A Engineering percussion drill |
| 10/14/2010 | US20100258326 Method and device |
| 10/12/2010 | CA2493552C Device for simultaneously casing a hole while drilling |
| 10/06/2010 | CN201599026U 对开取芯触探器 Sounding off coring device |
| 10/06/2010 | CN201598972U 一种自转式空气锤 One kind of rotation type pneumatic hammer |
| 10/06/2010 | CN201598971U 钻机水气同进冲击系统 Drill into the impact of the system with water vapor |
| 10/06/2010 | CN201598970U 气动凿岩机便携式扭矩加载器 Pneumatic rock drill portable torque loader |
| 10/06/2010 | CN101146654B Percussion device |
| 10/05/2010 | US7806205 Earth drilling device |
| 09/30/2010 | WO2010017367A3 Percussion assisted rotary earth bit and method of operating the same |
| 09/29/2010 | CN201593376U Hammer impact drill |
| 09/23/2010 | US20100236829 Stabilizer for drill strings |
| 09/22/2010 | CN201588930U Piston for rock drills |
| 09/22/2010 | CN201588560U Bidirectional multi-stage air leg |
| 09/22/2010 | CN201588529U Nylon water injecting valve used for tunnel driving rock drilling machine |
| 09/22/2010 | CN201588528U Bit shank sleeve of rock drill |
| 09/22/2010 | CN201588527U Spiral rod for rock drills |
| 09/22/2010 | CN201588526U Cutting-type deep hole drilling machine for hole bottom motor used in coal mines |
| 09/15/2010 | CN201581798U Upward type rock drilling machine |
| 09/15/2010 | CN101832099A Special drilling machine applied to coal mine getting working face |
| 09/08/2010 | CN201574688U Floating air distribution two-way impact type nonsmooth auger drill head |
| 09/08/2010 | CN201574685U Noise-reducing and shock-absorbing device of rock drill |
| 09/02/2010 | WO2010098557A2 Hydraulic breaker with automatic grease supply |
| 09/01/2010 | CN201568706U Oil filler of rock drill |
| 09/01/2010 | CN201568266U Air supplying device causing pneumatic executing component to possess self-lubricating function |
| 09/01/2010 | CN201567954U Sleeve valve downhole pneumatic impacter |
| 09/01/2010 | CN201567949U Hydraulic drilling machine |
| 09/01/2010 | CN101821471A Magnetic hammer |
| 09/01/2010 | CN101818623A Multifunctional electric well dredger |
| 08/31/2010 | US7784567 Earth-boring rotary drill bits including bit bodies comprising reinforced titanium or titanium-based alloy matrix materials, and methods for forming such bits |
| 08/25/2010 | CN201560705U Down-the-hole drill and connector thereof |
| 08/25/2010 | CN101812965A Method for driving drill of drilling machine |
| 08/25/2010 | CN101457634B Independence control hydraulic impactor for piezo crystal displacement feedback load port |
| 08/18/2010 | CN201554418U Water irruption-resistant boring device and drilling machine therewith |
| 08/18/2010 | CN201554363U Turbine type torsion impact drilling tool for hard formation |
| 08/18/2010 | CN101806192A Drilling machine water and gas simultaneously entering impact system |
| 08/12/2010 | US20100200301 Down hole hammer having elevated exhaust |
| 08/11/2010 | EP2216495A1 Drilling apparatus |
| 08/11/2010 | CN201546622U Gas drill hammer for drilling oil gas well |
| 08/11/2010 | CN201546610U Down-the-hole air hammer lubricating and oiling machine |
| 08/11/2010 | CN101798903A Large-aperture oil drilling impacter |
| 08/05/2010 | US20100193212 Hydraulic pick |
| 08/04/2010 | CN201539209U Light-duty well-point dewatering and punching device |
| 07/29/2010 | US20100187017 Down-the-hole Drill Reverse Exhaust System |