Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 3 - Rotary drilling
Patents for E21B 3 - Rotary drilling (4,061)
04/2014
04/25/2014CA2830860A1 Integrated casing drive
04/24/2014WO2014062158A1 Drilling motor with one-way rotary clutch
04/23/2014CN203559914U Pneumatic anchor drilling machine provided with short landing leg and five levels of pushing cylinder barrels
04/23/2014CN203559769U Hydraulic anchoring machine firm ground drill
04/23/2014CN103742072A Detachable combined sheave cathead for rotary drilling rig
04/17/2014WO2013130977A3 A continuous rotary drilling system and method of use
04/16/2014CN203548382U Hydraulic system of rotary drilling rig and rotary drilling rig
04/16/2014CN203547772U Efficient pulling-resisting roof bolter
04/16/2014CN203547570U Key sleeve, hub and rotary drilling rig
04/16/2014CN203547529U Full-automatic tube push bench improved structure for non-directional drill
04/16/2014CN203547528U Power head filtering device of rotary drilling rig
04/16/2014CN203547527U Rotary drilling rig-controlled rotation hydraulic loop system
04/16/2014CN203547526U Hard protection pit bottom fetching and drilling power head
04/16/2014CN203547525U Variable double pump control system of rotary drilling rig
04/16/2014CN203547524U Dual-drive coaxial forward and reverse output spiral rock-entering drilling machine
04/16/2014CN103726826A Power head cruising drilling method and system and rotary drilling rig
04/16/2014CN103726825A Power head cruising drilling method and system and rotary drilling rig
04/16/2014CN102654038B Cathead and rotary drilling rig
04/10/2014WO2014055276A2 Self-locking top drive guide system
04/10/2014DE102012019850A1 Method for monitoring drill pipes, involves driving outer bar by rotary drive before rotational position of outer bar is checked, during axial displacement of drill pipe is occurred by performing rotating movement in opposite direction
04/09/2014CN103711431A Variable-frequency electrically-driven top drive type core drill used for geological coring exploration
04/09/2014CN103711430A Rotary drilling rig hybrid power switching device
04/09/2014CN103711125A Hole drilling and pile pressing combined type piling machine
04/09/2014CN101975024B Rotary drilling rig and turntable thereof
04/08/2014US8689901 Electric power tool
04/03/2014US20140093316 Method For Injecting Surface Water Into The Ground
04/02/2014CN203515339U Underground drill rig capable of automatically returning drill
04/02/2014CN203515320U Efficient soil drilling machine
04/02/2014CN203515310U Novel perforating device
04/02/2014CN203515309U Hard protection wall hole bottom drilling power head with bevel blocks tightly inserted
04/02/2014CN203515308U Novel gear and rack top drive system
04/02/2014CN103696721A Bottom boulder grab and rotary drilling rig
04/02/2014CN103696683A Power head cruising drilling method, power head cruising drilling system and rotary drilling machine
04/02/2014CN103696682A Bidirectional rotating ground drill
04/02/2014CN102465666B Rotary drilling rig
04/01/2014CA2621259C Method of breaking brittle solids
03/2014
03/27/2014US20140083772 Vibration transmission and isolation
03/26/2014CN203499600U Guide rail type adjustable centering disc for coal bed gas drilling machine
03/26/2014CN203499573U Abrasion-resistant guide rail device for drill carriage
03/26/2014CN203499553U Adjusting device for petroleum drilling machine rotary disc
03/26/2014CN103670364A Power head cruising drilling method and system and rotary drilling rig
03/26/2014CN103670274A Rock pile foundation pore-forming device
03/26/2014CN103670272A Double-speed double-torque crawler type hydraulic cutting drilling machine
03/26/2014CN103670267A Drilling machine chain transmission connecting device
03/26/2014CN103670266A Drilling machine chain wheel
03/26/2014CN103670265A Servo mechanical transmission special for top drive drilling machine
03/26/2014CN103670264A Double-drive coaxial forward and reverse output spiral rock-entering drilling machine
03/20/2014WO2013100770A3 A borehole instrument system for ramam scattering
03/19/2014CN203488103U Rotary drilling tool and rotary drilling machine provided with same
03/19/2014CN203488099U Hydraulic control rapid drilling machine
03/19/2014CN203488093U Novel water well drilling rig
03/19/2014CN203488092U Power device and rotary drilling rig
03/19/2014CN203488091U High-speed electrically driven top drive for deep-hole coring
03/19/2014CN203487527U Novel visual intelligent extra-liquid concrete cast-in-place pile device
03/19/2014CN103643890A Top driving equipment
03/19/2014CN103643677A Tubular pile core taking-out machine
03/12/2014CN203482003U Large-torque water-cooling motor drilling machine
03/12/2014CN203476205U Power drilling soil taking device
03/12/2014CN203476202U Turnplate matched with core drill
03/12/2014CN203476201U Continuously-thrusting anchor cable drilling machine
03/12/2014CN203475431U Multifunctional pulling fixing machine
03/11/2014US8668027 Power tool
03/05/2014CN203463008U Power head structure for horizontal directional drilling machine
03/05/2014CN203463004U Rapid transportation electromechanical combination drill
03/05/2014CN203463003U Semi-automatic lifting column drill
03/05/2014CN203462473U Slurry transporting device for drilling machine power head
03/05/2014CN103615542A Novel water seal used for drilling machine power head
03/05/2014CN103615192A Hydraulic top driving device of drilling machine
03/05/2014CN103615191A Pumping-pressure reverse-circulation well drilling method and system
02/2014
02/26/2014CN203453441U Speed reducer lubricating oil filling device, speed reducer and rotary drilling rig
02/26/2014CN203452657U Supporting arm, luffing mechanism and rotary drilling rig
02/26/2014CN203452642U Device for floor type rotating elevating telescoping drilling tool of piling machine
02/25/2014US8657032 Electric tool
02/20/2014DE202014000508U1 Bohrgerät Drill
02/19/2014EP2697469A1 Rotation unit, rock drilling unit and method for rock drilling
02/19/2014CN203442080U Large straight-tooth bevel gear ring used for ultra-deep well oil rig rotary table
02/19/2014CN203441466U Novel drill lifting control device for rotary drilling rig
02/19/2014CN203441355U Novel forcible oil refilling device for rotary drilling rig power head
02/19/2014CN203441354U Portable rock core sampling drill
02/19/2014CN103590755A Key bushing, hub and rotary drilling rig
02/19/2014CN103590747A Rotary drilling rig mast anti-deflection device and rotary drilling rig with same
02/19/2014CN102644439B Rotating drilling rig enabling soil-discharging push plate to be automatically reset and construction method thereof
02/12/2014CN203430439U Thread type pile and spiral drilling machine for forming thread type pile
02/12/2014CN203430419U 螺旋钻机 Auger
02/12/2014CN203430418U Falling prevention follow-up frame sliding lug for rotary drilling rig
02/12/2014CN103573930A Multi-stage rotation speed and multi-power power head
02/12/2014CN102619464B Geological engineering drilling jig and oil delivery control method thereof
02/11/2014CA2707050C Top drive system
02/06/2014US20140034393 Drill stem component comprising a movable coupler and a pressure chamber
02/06/2014US20140034387 Rotation unit, rock drilling unit and method for rock drilling
02/05/2014CN203420631U Rotary drilling machine
02/05/2014CN203420630U Small-scale water prospecting drilling machine
02/05/2014CN103557018A Multifunctional rock tunnel borer jumbolter rotation rack
02/05/2014CN103556940A Dual-channel porous turbulence pressure relief drilling tool for soft coal rock drilling, and construction method of drilling tool
01/2014
01/29/2014EP2690248A2 Piping turntable
01/29/2014CN103541656A Hydraulic anchoring machine firm ground drill
01/22/2014CN203403814U Stroke compensation mechanism of hydraulic anchor rod drilling carriage power head for coal mine
01/22/2014CN103527758A Rotary drilling rig and operation device
01/22/2014CN103527081A Efficient soil drilling machine
01/22/2014CN103527076A Top-driving-power faucet
1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 41