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)
11/2012
11/07/2012CN101936129B Driller rotation power head adopting high-order elliptic molded surface active teeth speed changing device
11/06/2012US8302708 Rotational drill wrenches and drilling apparatuses including the same
11/06/2012CA2659602C A top drive apparatus for drilling a bore hole
11/01/2012WO2012121946A3 Methods of forming polycrystalline tables and polycrystalline elements and related structures
10/2012
10/31/2012CN202510434U Impact resistant tensioning hydraulic system and rotary drilling rig
10/31/2012CN202510027U Small-size power head and vehicle-mounted drilling machine using same
10/31/2012CN202510026U Linkage hydraulic system for coal mine all-hydraulic drill
10/31/2012CN202510025U Trenchless drilling equipment
10/31/2012CN202508811U Rotary drilling rig and main hoist control system
10/31/2012CN102758586A Front arm type real-time random lifting loading type pit drill
10/29/2012DE202012102797U1 Verrohrungs-Drehtisch A tubing rotary table
10/24/2012CN202500490U Decelerator for driving drilling machine rotating disk of deep hole core
10/24/2012CN202500138U Multifunctional static pile driver
10/24/2012CN101942970B Hoisting device of power tap
10/23/2012US8294399 Motor controller and electric tool having the same
10/23/2012CA2523092C Systems and methods using a continuously variable transmission to control one or more system components
10/18/2012WO2012140326A1 Rotation unit, rock drilling unit and method for rock drilling
10/18/2012CA2829144A1 Rotation unit, rock drilling unit and method for rock drilling
10/17/2012CN202493265U Portable sampling drill
10/17/2012CN202493216U Easily assembled and disassembled kelly bar driver
10/17/2012CN102733753A Ground hole drilling machine
10/11/2012US20120255789 Bearing assemblies, and bearing apparatuses and motor assemblies using same
10/11/2012US20120255783 Rotating control device with positive drive gripping device
10/10/2012CN202484118U High-elastic coupler of rotary drilling rig
10/10/2012CN202483464U Rotary drilling rig
10/10/2012CN202483440U Tractor type mobile drill rig
10/10/2012CN102725474A Rotary table device for a pipe string
10/10/2012CN102720453A Method and device for mechanically removing sand and draining liquid from pit shaft of oil/gas well in underbalanced state
10/10/2012CN102720429A Hydraulic-driven drilling device
10/10/2012CN102720428A Rotary drilling rig and method for loading same
10/10/2012CN102718165A Winding plant and rotary drilling rig with same
10/10/2012CN102002940B Drilling apparatus and method for working the ground
10/10/2012CN101705786B Pot hole drilling machine carried on vehicle
10/10/2012CN101405472B Top drive for borehole operation, related seal assembly and seal method
10/09/2012US8281877 Method and apparatus for drilling with casing
10/03/2012CN202468927U Reduction box for power head and vehicular coalbed gas drill rig with reduction box
10/03/2012CN202468783U Hydromatic brake device
10/03/2012CN202467805U Dual redundancy electric control system for rotary drilling rig
10/03/2012CN202467651U High-speed rotating drilling machine
10/03/2012CN202467648U Warped power head and vehicle-mounted coal bed gas drilling machine using same
10/03/2012CN202467646U Spiral piling machine
10/03/2012CN202467640U Novel rotating drill bit for drilling machine
10/03/2012CN202467639U Drilling robot
10/03/2012CN202467638U Large-torque drilling machine with driving force gear shifting gearbox
10/03/2012CN202467637U Self-adaptive locking feed mechanism for rotary drilling rig
10/03/2012CN202467636U Locking control device of rotary drilling rig
10/03/2012CN202467635U Rotary drilling rig
10/03/2012CN202467634U Electro-hydraulic control device capable of automatically regulating rotating speed of power head
10/03/2012CN202467633U Cutting-type drilling machine
10/03/2012CN202467632U Hydraulic power head module used for long spiral drilling machine
10/03/2012CN102706553A Measurement method and device and rotary drilling dig
10/03/2012CN102704851A Bottom expanding drill bit and rotary drilling machine
10/03/2012CN102704838A Power type multifunctional drilling machine based on excavating machine
10/03/2012CN102704837A Shallow hole drilling machine
10/03/2012CN102704832A Rotary drilling rig
10/03/2012CN102704519A Underground concrete wall making machine
10/02/2012US8276685 Electrical power tool
09/2012
09/26/2012EP2503092A1 Locking device for tubular elements
09/26/2012CN202451664U Rotary braking device of rotary drilling rig and rotary drilling rig
09/26/2012CN202451065U Drilling tool and rotary drilling machine provided with same
09/26/2012CN202451047U All-hydraulic double-pole soft coal drilling machine
09/26/2012CN202451046U Dual-purpose integral hydraulic power head of long spiral drilling machine
09/26/2012CN102691483A Rotary drilling rig and pulley yoke thereof
09/26/2012CN101586440B Oriented rotational guide drilling tool
09/26/2012CN101466911B Method and apparatus for oscillating a drill string
09/26/2012CN101432498B Top drive apparatus
09/20/2012US20120234567 Rock drill oil
09/19/2012CN202441255U Ultra-low-height hydraulic power head type rotary drilling machine
09/19/2012CN202440815U Forming device for long-spiral filling pile extruded into rock
09/19/2012CN102678069A Boring device having a buffering function and anchor construction method using the same
09/19/2012CN102678049A Circular cutting drill bit, rotary drilling machine and rock drilling method adopting static blasting
09/19/2012CN102678045A Oil-electricity dual-purpose rotary drilling rig
09/19/2012CN102678042A Driving and connecting device for rotary drilling rig power head pile casing
09/19/2012CN102678041A Movable arm limit device of rotary drilling rig, rotary drilling rig and protection method of rotary drilling rig
09/19/2012CN102678040A Drilling device and method for baseplate in coal mine roadway
09/19/2012CN102677716A Movable arm trenching machine
09/18/2012CA2690179C Top drive apparatus and bails therefor
09/18/2012CA2681535C A top drive apparatus
09/13/2012WO2012121946A2 Methods of forming polycrystalline tables and polycrystalline elements and related structures
09/13/2012WO2012121945A2 Methods of forming polycrystalline tables and polycrystalline elements and related structures
09/13/2012US20120227994 Cordless tool system
09/13/2012CA2828870A1 Methods of forming polycrystalline tables and polycrystalline elements and related structures
09/13/2012CA2828868A1 Methods of forming polycrystalline tables and polycrystalline elements and related structures
09/12/2012CN202431264U Depth measuring device of rotary drilling rig
09/12/2012CN202431184U Split self-propelled coal mine tunnel drill rig
09/12/2012CN202431181U In-hole oil pressure rotating device with oil distribution structure
09/12/2012CN102661120A Motor parallel operation device for drilling machine
09/05/2012EP2495388A1 Drilling head for drilling machines
09/05/2012CN202418576U Special waterproof device for drilling machine
09/05/2012CN202417323U Turntable device and rotary drilling rig
09/05/2012CN202417308U Dual-functional rotary digging machine
09/05/2012CN202417300U Gear case floating structure for power head of drilling machine
09/05/2012CN202417299U Handheld emulsion drill rig
09/05/2012CN202415060U Rotary drilling rig and main winding lowering speed control device
09/05/2012CN1944939B Separable driving type sleeve screw drilling rig and its construction method
09/05/2012CN102654038A Cathead and rotary drilling rig
09/05/2012CN102654021A Tunnel drilling machine
09/05/2012CN101713278B One-pile double-machine construction method for drilling pouring pile hole formation
09/04/2012CA2472313C Carrier vehicle for drilling or rockbolting machine
08/2012
08/29/2012CN202401981U Drilling machine
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