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 4 - Drives for drilling, used in the borehole
Patents for E21B 4 - Drives for drilling, used in the borehole (6,032)
10/2012
10/10/2012CN101405472B Top drive for borehole operation, related seal assembly and seal method
10/10/2012CN101243600B Brushless motor commutation and control
10/09/2012CA2571358C Entrainment fluid channeling device for a down-hole drill string
10/04/2012WO2012092091A3 Remote actuation testing tool for high pressure differential downhole environments
10/04/2012WO2012068522A3 Apparatus and method for controlling or limiting rotor orbit in moving cavity motors and pumps, such as mud motors
10/04/2012US20120247839 Drilling apparatus
10/04/2012US20120247835 Method for the drilling, in particular percussion or rotary percussion drilling, of holes in soil or rock material and device therefor
10/03/2012EP2504076A1 Filter and method for filtration of hydraulic oil in a return line to a hydraulic tank, and a drilling rig comprising the filter
10/03/2012CN202467687U Front connector of high pressure down-hole hammer
10/03/2012CN202467643U Control pipeline for down-hole drill
10/03/2012CN202467642U Double-control platform down-the-hole drill
10/03/2012CN202467641U Drill boom rotating device for down-hole drill
10/03/2012CN102713138A Downhole guiding tool
10/03/2012CN102713127A Stator inserts, methods of fabricating the same, and downhole motors incorporating the same
10/03/2012CN102713126A Stators for downhole motors, methods for fabricating the same, and downhole motors incorporating the same
10/03/2012CN102704833A Hole bottom power drilling rig adopting magnetic drive technology
10/03/2012CN101268247B A percussion hammer for enlarging drilled holes
09/2012
09/26/2012CN202451050U Transmission shaft device of thin-wall sliding bearing of screw drill tool
09/26/2012CN202451049U Seal device of transmission shaft of PDM (positive displacement motor) drill
09/26/2012CN202451048U Heavy-load transmission shaft device for spiral drilling rig
09/26/2012CN102695844A Stators for downwhole motors, methods for fabricating the same, and downhole motors incorporating the same
09/20/2012WO2012125619A2 Hydro-mechanical downhole tool
09/20/2012WO2012087752A3 High temperature drilling motor drive with cycloidal speed reducer
09/20/2012US20120234603 Mud motor assembly
09/19/2012EP2499322A2 Downhole tractor
09/19/2012CN101864907B Vibration damper and downhole drill comprising the same
09/18/2012US8267196 Flow guide actuation
09/18/2012CA2752542C Hydraulic control system for drilling systems
09/13/2012WO2012122321A2 Bearing / gearing section for a pdm rotor / stator
09/13/2012WO2012122211A1 Magnetostrictive motor for a borehole assembly
09/13/2012WO2012122141A1 Jarring method and apparatus using fluid pressure to reset jar
09/13/2012WO2012120403A1 Mechanical force generator for a downhole excitation apparatus
09/13/2012US20120228031 Ram boring device
09/13/2012CA2829220A1 Jarring method and apparatus using fluid pressure to reset jar
09/13/2012CA2828675A1 Mechanical force generator for a downhole excitation apparatus
09/12/2012CN202431182U Orifice device for combined type down-the-hole hammer
09/12/2012CN102665853A Filter and method for filtration of hydraulic oil in a return line to a hydraulic tank, and a drilling rig comprising the filter
09/12/2012CN102661121A Rotary drilling machine for obtaining rock sample under polar region ice layer
09/07/2012WO2012116460A1 Pressurised fluid flow system for a normal-circulation down-the-hole hammer and hammer comprising said system
09/07/2012CA2828790A1 Pressurised fluid flow system for a normal-circulation down-the-hole hammer and hammer comprising said system
09/06/2012US20120222864 Completion arrangement
09/05/2012EP2494136A1 A device and a system and a method of moving in a tubular channel
09/05/2012EP2494135A1 Downhole apparatus
09/05/2012CN102022860B Process method for constructing ground source heat pump well
09/05/2012CN101356339B Down-the-hole hammer and components for a down-the-hole hammer, and a method of assembling a down-the-hole hammer
09/04/2012US8256539 Steerable ground piercing tools
08/2012
08/28/2012CA2632042C Wellbore motor having magnetic gear drive
08/28/2012CA2579085C Method and apparatus for extending flow range of a downhole turbine
08/23/2012WO2012112016A2 Boring machine
08/23/2012US20120211251 Pulse Generator
08/23/2012DE112010004390T5 Statoren für Bohrlochmotoren, Verfahren für ihre Herstellung und Bohrlochmotoren, die sie enthalten Stators for downhole motors, processes for their preparation and downhole motors that they contain
08/23/2012CA2827458A1 Boring machine
08/22/2012EP2097609B1 Coiled tubing tractor assembly
08/22/2012CN202392053U Rotary speed reducing box for downhole drill
08/22/2012CN202391343U Downhole in-hole drilling machine
08/22/2012CN102648327A Bit assembly for a down-the-hole hammer drill
08/21/2012US8245798 Female part and a method for manufacturing female parts
08/21/2012US8245796 Tractor with improved valve system
08/16/2012WO2012109109A2 Multiple motor/pump array
08/16/2012WO2012106999A1 Annulus ring hole drill
08/16/2012CA2818859A1 Annulus ring hole drill
08/15/2012CN202380983U Turbine section for high-speed turbodrill
08/15/2012CN101294480B Device for drilling miniature borehole on ultra-short radius of coiled tubing
08/08/2012EP2484863A2 Novel activating mechanism for controlling the operation of a downhole tool
08/08/2012CN102628337A Horizontal submarine polymetallic sulfide deposit area chimney sampling drill
08/02/2012US20120193145 Vibrating Downhole Tool
08/02/2012CA2825027A1 Oil-sealed mud motor bearing assembly with mud-lubricated off-bottom thrust bearing
08/01/2012EP2481880A2 Drive shaft constant velocity joint assembly with radial elliptical projections
08/01/2012CN202360067U Driving mechanism of derrick framed pumping unit
08/01/2012CN202360026U Cylindrical integrated hydraulic power source of automatic vertical drilling tool
08/01/2012CN202360021U Integrated high-performance screw drill
08/01/2012CN102619952A Hydraulic torque converter ahead reduction box
08/01/2012CN102619466A Rotary eccentric casing pipe internally drilling device
07/2012
07/31/2012US8230912 Hydraulic bidirectional jar
07/26/2012US20120186883 Drill bit assembly for fluid-operated percussion drill tools
07/26/2012US20120186878 Downhole tool
07/25/2012CN202348347U Wolfram carbide surface strengthening turbine blade
07/25/2012CN202348346U Stator and rotor combined piece for turbine
07/25/2012CN202348113U Drilling pendulum power head for high-pressure jet grouting
07/25/2012CN202348112U Internal coning type hydraulic rescue borer for mining rescue capsule
07/25/2012CN202348110U Pure electric hydraulic rotary drilling rig
07/25/2012CN102606068A Control desk for down-the-hole drill
07/25/2012CN102207219B Cylinder control valve for down-the-hole drill
07/18/2012EP2475835A2 Valves, bottom hole assemblies, and methods of selectively actuating a motor
07/18/2012CN202338523U 一种凿岩钻机用集成控制液压阀系统 One kind of rock drills, hydraulic valve control system integration
07/18/2012CN202337976U 潜孔冲击高压旋喷注浆设备 DTH hammer high pressure jet grouting equipment
07/18/2012CN102587834A Drilling tool and piling machinery
07/18/2012CN102587832A Pressure resistant tool for reducing frictional resistance of horizontal well section
07/18/2012CN102587827A Downhole motor or pump components, method of fabrication the same, and downhole motors incorporating the same
07/18/2012CN101824961B Multifunctional motive power head of full hydraulic drilling machine
07/12/2012WO2012094460A2 Pressure compensation system for an oil-sealed mud motor bearing assembly
07/12/2012CA2823386A1 Pressure compensation system for an oil-sealed mud motor bearing assembly
07/11/2012CN202325464U 桩机冲锤自动控制装置 Pile hammer automatic control device
07/11/2012CN202325234U 多功能全液压钻机 Multifunctional Hydraulic Drill
07/11/2012CN202325231U 可防止卡钻的潜孔钻机钻具 Prevents sticking DTH drill rig
07/11/2012CN102561951A Double-stage and double-speed well drilling tool
07/11/2012CN102561943A Double-motor drill bit
07/11/2012CN102561942A Wired mud motor components, methods of fabricating the same, and downhole motors incorporating the same
07/10/2012US8215841 Bearing assembly for use in earth drilling
07/10/2012US8215419 Variable frequency control for down hole drill and method
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