| Patents for E21B 1 - Percussion drilling (2,080) |
|---|
| 01/23/2013 | CN102889060A Drill clamp mechanism and jackdrill |
| 01/23/2013 | CN102889058A Landing leg type rock drill and reversing operating mechanism for landing leg type rock drill |
| 01/23/2013 | CN102889053A Hydraulic rock drill as well as impactor and flow equalizing valve used for rock drill |
| 01/23/2013 | CN102155154B Pressure controlled automatic reversing working device for punch of rock drilling machine |
| 01/23/2013 | CN101832099B Special drilling machine applied to coal mine getting working face |
| 01/23/2013 | CN101680266B Fuel-powered rock breaker |
| 01/16/2013 | CN202673141U Mount type integrated hydraulic rock driller |
| 01/16/2013 | CN202673138U Piston guide sleeve type valveless double-cylinder down-hole hammer |
| 01/16/2013 | CN202673137U Piston type nail drift |
| 01/16/2013 | CN202673136U Vibration impact device and piling worker drilling unit head device comprising same |
| 01/09/2013 | CN202659322U Novel air scoop |
| 01/09/2013 | CN202659139U Pneumatic stirring and drilling device |
| 01/02/2013 | CN102859108A Air compressor system and method of operation |
| 01/02/2013 | CN102858499A Rock drilling machine and use thereof for hindering occurrence and spreading of cavitation bubbles |
| 01/02/2013 | CN102852455A Percussion drilling tool |
| 01/02/2013 | CN102174876B A drilling apparatus having in-line extending wings and driving method thereof |
| 01/01/2013 | US8342264 Device for reducing drilling noise and related methods |
| 12/26/2012 | CN202627955U 气动式冲击钻 Pneumatic Impact Drill |
| 12/26/2012 | CN102839914A Intermediate wind pressure high-speed rock drilling machine |
| 12/25/2012 | US8336641 Electric tool |
| 12/19/2012 | CN102828690A Walking dual-swing downhole drill |
| 12/13/2012 | WO2012168559A1 Percussion device of rock breaking device and method for controlling percussion device |
| 12/13/2012 | WO2012168558A1 Percussion device of rock breaking device and method for controlling percussion device |
| 12/12/2012 | CN202596578U Horizontal orientation drilling system |
| 12/12/2012 | CN202596569U Impact air lift reverse circulation drilling machine |
| 12/12/2012 | CN102818018A Impact piston and hydraulic breaking hammer with same |
| 12/12/2012 | CN102817555A Hydroenergy impactor |
| 12/12/2012 | CN102817554A Hydraulic-drive hammer with slurry shunting and side wall sealing functions |
| 12/06/2012 | WO2012165850A2 Fragment scattering protection apparatus for a brake of an excavator |
| 12/04/2012 | US8322463 Down hole multiple piston tools operated by pulse generation tools and methods for drilling |
| 11/29/2012 | WO2012161595A1 Downhole sinusoidal vibrational apparatus |
| 11/29/2012 | CA2836699A1 Downhole sinusoidal vibrational apparatus |
| 11/28/2012 | CN202560092U Butted rotating sleeve |
| 11/28/2012 | CN202560091U Triangular turn drill sleeve device of hydraulic rock drill |
| 11/27/2012 | US8316960 Hammer device |
| 11/21/2012 | CN102787801A Impact perforating machine |
| 11/21/2012 | CN102787599A Piling method of spiral steel pile |
| 11/14/2012 | CN202531014U Adjustable rock drilling control system of hydraulic rock drilling machine |
| 11/14/2012 | CN202531013U Positioning control system of hydraulic rock drill |
| 11/14/2012 | CN202531012U Bit shank guiding device of hydraulic rock drill |
| 11/13/2012 | US8309050 Polycrystalline diamond materials having improved abrasion resistance, thermal stability and impact resistance |
| 11/08/2012 | WO2012150895A1 A striker member, and a drilling machine comprising a striker member |
| 11/08/2012 | CA2834226A1 A striker member, and a drilling machine comprising a striker member |
| 11/07/2012 | CN202517463U Composite handle body device of internal combustion rock drill |
| 11/06/2012 | US8302707 Down-the-hole drill reverse exhaust system |
| 11/01/2012 | WO2012148347A1 An impact mechanism, rock drill and drill rig comprising such impact mechanism |
| 11/01/2012 | CA2834155A1 An impact mechanism, rock drill and drill rig comprising such impact mechanism |
| 10/31/2012 | EP2518255A1 Air hammer for a boring machine |
| 10/31/2012 | CN202510024U Impactor |
| 10/31/2012 | CN101993014B Automatic ground punching hoist |
| 10/31/2012 | CN101787852B Impact drill powered by hammering and using method thereof |
| 10/24/2012 | CN202500489U All-dimensional reversing device of jackdrill |
| 10/24/2012 | CN202500488U Drilling, crushing, excavating and loading integrator for fully hydraulic drilling |
| 10/24/2012 | CN101956531B Underground horizontal drilling combined drilling tool of oil well drilling platform |
| 10/23/2012 | CA2627488C Backhead and drill assembly with backhead |
| 10/23/2012 | CA2557060C Pressure-fluid-operated percussion device |
| 10/11/2012 | WO2012138288A1 Device and method for rock- and concrete machining |
| 10/11/2012 | WO2012138287A1 Device for rock- and concrete machining |
| 10/11/2012 | CA2832166A1 Device and method for rock- and concrete machining |
| 10/11/2012 | CA2832165A1 Device for rock- and concrete machining |
| 10/10/2012 | CN202483433U High-wind-pressure impacter |
| 10/10/2012 | CN202483432U Pipe-following drilling system suitable for drilling in gravel stratum |
| 10/04/2012 | WO2012087050A3 Apparatus and method for controlling breaker beats of heavy construction machinery |
| 10/04/2012 | US20120247837 Horizontal drilling system |
| 10/03/2012 | CN202467631U Geological exploration drilling rig |
| 10/03/2012 | CN102704839A Hanging carrying type integral hydraulic rock drilling machine |
| 09/26/2012 | CN202451045U Pile work drilling device |
| 09/26/2012 | CN102691475A Energy-saving percussion drill |
| 09/25/2012 | US8272453 Handheld power tool |
| 09/19/2012 | EP2499520A2 System for exploration of subterranean structures |
| 09/19/2012 | CN102686820A Air hammer for a boring machine |
| 09/19/2012 | CN102686819A System for preventing idle blow and adjusting hitting power of breaker |
| 09/18/2012 | CA2602937C Percussion device |
| 09/18/2012 | CA2581325C Method for breaking rock |
| 09/13/2012 | WO2012120403A1 Mechanical force generator for a downhole excitation apparatus |
| 09/13/2012 | CA2828675A1 Mechanical force generator for a downhole excitation apparatus |
| 09/12/2012 | CN202431629U Two-circuit valve outer overlying accelerating return circuit of hydraulic system |
| 09/12/2012 | CN202431180U Hammerhead backflow preventing device of air hammer for gas drilling |
| 09/12/2012 | CN202431179U Piston rod of rock drill |
| 09/12/2012 | CN202431178U Double-buffering system of hydraulic rock drill |
| 09/05/2012 | CN202418079U Mechanical gripper pressure control valve for rock drills |
| 09/05/2012 | CN202417298U Sealing guide device for hydraulic rock drill shank |
| 09/05/2012 | CN202417297U Two-level cushioning device of hydraulic rock drill |
| 09/05/2012 | CN102654057A Construction method for treating weathering sphere in advance by using percussion drill in tunneling range of shield machine as well as formed reinforcing structure |
| 09/05/2012 | CN102022860B Process method for constructing ground source heat pump well |
| 08/29/2012 | CN101956530B Underground horizontal bore drilling tool used for petroleum drilling |
| 08/23/2012 | US20120211251 Pulse Generator |
| 08/22/2012 | CN202391338U Device for quickly punching ceiling |
| 08/22/2012 | CN101818623B Multifunctional electric well dredger |
| 08/15/2012 | CN202380970U Hammer piston |
| 08/15/2012 | CN102635307A Three-edged turn drill sleeve device of hydraulic rock drill |
| 08/15/2012 | CN101906940B Impacting head assembly for ground drills |
| 08/08/2012 | CN202370426U Piston stroke fast adjusting device for hydraulic rock drill |
| 08/08/2012 | CN102628335A Percussion drill notching press |
| 07/25/2012 | CN102606066A Impacter |
| 07/25/2012 | CN102606065A Lengthened drilling machine drilling arm convenient for transportation |
| 07/18/2012 | CN202338200U 用于工程钻机的捆绑式冲击器 Rig for bundled impactor |
| 07/18/2012 | CN202338199U 一种新型液压凿石机 A new hydraulic stone quarry machine |
| 07/18/2012 | CN202338198U 液压掘岩器 Hydraulic dig rock unit |
| 07/18/2012 | CN202337983U 喷射器、钻头组合结构及组合钻具 Injectors, the structure and composition of the drill bit combination |