Patents for E21B 1 - Percussion drilling (2,080) |
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04/16/2014 | EP2718063A1 Percussion device of rock breaking device and method for controlling percussion device |
04/16/2014 | CN203547523U Down-hole hammer for high-air-pressure drilling machine drilling work |
04/16/2014 | CN203547522U Down-hole hammer |
04/16/2014 | CN203547521U Automatic rammed bulb pile heavy hammer hook |
04/16/2014 | CN103726783A Novel sleeve valve type hydraulic impacting mechanism |
04/16/2014 | CN102505724B Hole guiding device and hole guiding method for bad ground |
04/15/2014 | CA2777356C Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly |
04/09/2014 | EP2715030A1 Downhole sinusoidal vibrational apparatus |
04/09/2014 | CN203531901U Multi-functional hydraulic rock drilling shoveling device |
04/09/2014 | CN203531743U Rock drill |
04/02/2014 | CN203515307U Hydraulic system for retraction of hydraulic hammer piston rod |
04/02/2014 | CN103696681A Support regulating device of rock drill |
03/27/2014 | US20140083778 Thread device, thread joint and drill string component for percussive rock drilling |
03/26/2014 | CN203499552U High-wind-pressure impactor |
03/26/2014 | CN203499551U Rotary pile drilling machine hole bottom hydraulic high-frequency percussion drill |
03/26/2014 | CN103670263A Novel shake-proof noise-reduction rock drill |
03/19/2014 | CN203488104U Percussion drill impact hammer for drilled pile drilling construction in beaded type karst area |
03/19/2014 | CN203488090U Punching device for burying earthing electrode of electric transmission line |
03/19/2014 | CN203488089U Hydraulic impact device |
03/18/2014 | CA2647838C Impact adapter for a rock drill |
03/13/2014 | WO2014037619A2 Method for surveying drill holes, drilling arrangement, and borehole survey assembly |
03/12/2014 | EP2704880A1 A striker member, and a drilling machine comprising a striker member |
03/12/2014 | CN203476853U Nitrogen bag of YYT29A hydraulic rock drill |
03/12/2014 | CN203476852U Nitrogen bag of QL29A hydraulic rock drill |
03/12/2014 | CN203476200U Hydraulic rock drill |
03/12/2014 | CN102628335B Percussion drill notching press |
03/05/2014 | CN102606065B Lengthened drilling machine drilling arm convenient for transportation |
02/19/2014 | CN203441410U Rope impact drilling tool capable of adjusting hydraulic pressure |
02/19/2014 | CN102691475B Energy-saving percussion drill |
02/19/2014 | CN102561936B Rock drilling control system of hydraulic rock drilling machine |
02/19/2014 | CN102561935B Positioning control system of hydraulic rock drilling machine |
02/19/2014 | CN102418344B Injector, drill bit combination structure and combination drilling tool |
02/13/2014 | WO2014023085A1 Multi-point guidance support method for reciprocating impact machine and reciprocating impact machine device having multi-point guidance support that implements said method |
02/12/2014 | EP2694252A1 Device and method for rock- and concrete machining |
02/12/2014 | EP2694251A1 Device for rock- and concrete machining |
02/12/2014 | CN103573183A Modified pneumatic percussion drill |
02/12/2014 | CN103573182A Piston guide sleeve type valveless double-cylinder down-hole hammer |
02/11/2014 | CA2686627C Electrically sequenced tractor |
02/04/2014 | US8640787 Portable post driving apparatus |
01/29/2014 | CN203412507U Hexagonal drilling machine |
01/29/2014 | CN103541655A Drill rod buffer positioning device of hydraulic rock drill |
01/29/2014 | CN103541654A Hydraulic impactor |
01/22/2014 | CN203403805U Impact mechanism of pneumatic roof bolter for coal mine |
01/16/2014 | WO2014011178A1 Control line damper for valves |
01/16/2014 | US20140014412 Polycrystalline diamond percussion drill bits using low thrust and torque for application with small diameter drill bits |
01/15/2014 | CN203394342U Soil perforating machine |
01/15/2014 | CN103511822A Method and device for gadder oil injection |
01/09/2014 | WO2014007477A1 Impact body for hydraulic impact device |
01/08/2014 | EP2681408A1 Mechanical force generator for a downhole excitation apparatus |
01/08/2014 | CN103501964A A striker member, and a drilling machine comprising a striker member |
01/03/2014 | WO2014003626A1 Device and method in respect of a rock drilling machine and rock drilling machine |
01/01/2014 | CN103492131A An impact mechanism, rock drill and drill rig comprising such impact mechanism |
12/26/2013 | US20130340999 System and method for drilling hammer communication, formation evaluation and drilling optimization |
12/25/2013 | CN203362023U Large diameter drill hammer for filling pile drilling machine |
12/25/2013 | CN102223986B Rock drilling machine and axial bearing module |
12/25/2013 | CN102094576B Crushing mechanism |
12/25/2013 | CN102076931B Bottom-hole assembly, and method and system for transmitting data from bottom-hole assembly |
12/25/2013 | CN101675205B High productivity core drilling system |
12/24/2013 | CA2606788C Percussion device for a rock drilling machine, method for achieving a reciprocating percussion piston movement and rock drilling machine |
12/19/2013 | WO2013187691A1 Hammer raising device |
12/18/2013 | CN203347678U Electro-hydraulic pulse type rock drill |
12/18/2013 | CN103459095A Device for rock- and concrete machining |
12/18/2013 | CN103459094A Device and method for rock and concrete machining |
12/18/2013 | CN103452510A Water pressure-adjustable rope impact drill |
12/18/2013 | CN103452472A Slurry pumping type well drilling device and well drilling method |
12/17/2013 | CA2606791C Valve device for a percussion device and percussion device for a rock drilling machine |
12/11/2013 | CN203329512U Drilling liquid-gas separator for air hammer |
12/11/2013 | CN102337839B Directionally rotating type air hammer |
12/04/2013 | CN103422810A Soil boring machine |
12/04/2013 | CN102454360B Hydraulic jet impacter |
12/04/2013 | CN102454359B Integral casting cylinder block and manufacturing method |
12/04/2013 | CN102134962B Automatic punching pile driver |
11/28/2013 | DE102012013409A1 Schlagvorrichtung Impact device |
11/27/2013 | CN103410432A Hexagonal drilling machine |
11/20/2013 | CN203296725U Through type DTH hammer reverse circulation drilling dust collecting device |
11/20/2013 | CN203296693U Drilling tool capable of generating axial impact vibration |
11/20/2013 | CN203296677U Single connecting lever overrunning percussion drill |
11/20/2013 | CN203296676U Combined down-hole hammer drilling tool |
11/12/2013 | US8579042 Battery pack and cordless tool using the same |
11/06/2013 | CN102561947B Vibroflotation lead hole construction method based on pneumatic drill slag stirring |
11/06/2013 | CN102561937B Adjustable rock drilling control system of hydraulic rock drilling machine |
11/06/2013 | CN102134963B Cylinder controlled automatic punching pile machine |
10/30/2013 | CN203257324U 重力冲击钻 Gravity Impact Drill |
10/30/2013 | CN203257323U Hydraulic pulley percussion drill |
10/23/2013 | CN203248058U Automatic impactor |
10/23/2013 | CN203248057U Rectangular bored concrete pile hole forming machine |
10/23/2013 | CN203248056U Roller pore-forming machine |
10/23/2013 | CN203248055U Impactor convenient to operate |
10/23/2013 | CN203248054U Hammering construction device |
10/22/2013 | CA2765605C Air hammer optimization using acoustic telemetry |
09/26/2013 | WO2013141531A1 Chisel assembly having multiple chisel bars for breaker |
09/25/2013 | CN102155150B Crushing mechanism with gas inlet pipe |
09/24/2013 | CA2607415C Impulse generator, hydraulic impulse tool and method for producing impulses |
09/18/2013 | CN103306284A Construction machine and method for operating same |
09/11/2013 | CN203188898U Radius retention rotation type air hammer |
09/11/2013 | CN103291209A Single-crank-arm surpassing percussion drill and application method |
09/04/2013 | CN203175388U Roof suspension expansion screw puncher |
09/04/2013 | CN103277038A Piston for impacter |
09/04/2013 | CN103277037A Pipe pile leading-hole construction method under boulder cluster geological condition |
08/28/2013 | CN203161075U Electromagnetic impacter |