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)
08/2014
08/13/2014CN103982134A 一种反循环钻井工具 An anti-circulation drilling tools
08/12/2014US8800690 Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly
08/12/2014US8800688 Downhole motors with a lubricating unit for lubricating the stator and rotor
08/12/2014CA2755220C Bearing assembly for a downhole motor
08/07/2014WO2013185005A3 Tachometer for downhole drilling motor
08/06/2014CN103975117A 改进的钢缆式钻井系统 Improved cable drilling system
08/06/2014CN103975116A 球座铣削和再压裂方法 Tee milling and re-fracturing method
08/06/2014CN103967408A 液动冲击钻井工具 Hydraulic percussion drilling tool
08/06/2014CN102839917B 回转热熔钻头 Rotary hot melt drill
08/06/2014CN102828689B 电缆悬挂式气体局部反循环电动机械取芯钻具 Cable hanging gas partial reverse circulation drill coring electrical machinery
08/05/2014CA2744549C Valve-controlled downhole motor
07/2014
07/31/2014WO2014116934A1 Hydraulic activation of mechanically operated bottom hole assembly tool
07/31/2014DE112012004811T5 Verdrängungsmotor mit radial eingeschränktem Rotormitnehmer Displacement engine with radially restricted Rotormitnehmer
07/30/2014EP2758681A1 Bearing assemblies, apparatuses, and related methods of manufacture
07/30/2014EP2758620A2 Well tractor with active traction control
07/30/2014CN203742462U 一种涡轮钻具装置 A turbine drill device
07/30/2014CN203742434U 新型油缸链条给进系统 The new cylinder chain feeding system
07/30/2014CN103953284A 液压螺旋水平定向钻 Hydraulic screw Horizontal Directional Drilling
07/30/2014CN103953281A 复合冲击钻井工具 Complex percussion drilling tool
07/29/2014US8789281 Hydrodynamic lubrication made possible by the wearing-in of superhard bearing elements over time
07/24/2014WO2014113315A1 Casing drilling assembly
07/24/2014WO2014113025A1 Multi-stage setting tool with controlled force-time profile
07/23/2014CN203729869U 气动潜孔锤排渣装置 DTH slagging device
07/23/2014CN203729868U 一种钻车回转器 One kind of drills Rotator
07/23/2014CN203729867U 螺杆钻具用防掉传动轴总成 Screw drill shaft assembly with anti-out
07/23/2014CN103946478A 具有径向约束的转子卡子的容积式马达 A rotor having a radially constrained volume clamp motors
07/23/2014CN103939014A 泵举反循环潜式横旋方孔钻机 Submersible pump lift reverse circulation drilling rig horizontal spin square hole
07/23/2014CN103939009A 无线随钻式空气快速钻进组合钻具 MWD air quickly got into a combination of drill
07/23/2014CN103939008A 线投影叶片制动级定转子组合件 Line projection stage rotor blade brake assemblies
07/22/2014US8783353 Increased energy impact tool
07/17/2014WO2014110489A1 Downhole vibratory apparatus
07/17/2014US20140196953 Drilling apparatus
07/16/2014EP2754850A1 An apparatus and method for cutting a wellbore
07/16/2014EP2753778A2 Downhole motors and pumps with asymmetric lobes
07/16/2014CN203716840U 液压钻车推进控制冲击液压回路 The impact of hydraulic drilling propulsion control hydraulic circuit
07/16/2014CN102943466B 微型钢管混凝土桩穿透路基层加固软弱地基施工工法 Miniature penetrate concrete base course reinforcement steel pipe pile foundation construction method weak
07/15/2014US8776916 Drilling motors with elastically deformable lobes
07/15/2014US8776911 Hydraulic breaker
07/15/2014CA2533430C Down hole hammer drill
07/10/2014US20140190706 Encapsulating an electric submersible pump cable in coiled tubing
07/09/2014EP2751368A1 Pneumatic down-the-hole drill
07/09/2014CN203701953U 用于灌注桩施工的伸缩式潜孔钻具 Telescopic DTH drilling for pile construction
07/09/2014CN203701951U 一种扭转冲击发生器 One kind of torsion impulse generator
07/09/2014CN203701950U 涡轮混流式井下动力增压钻具 Francis turbine downhole pressurized drilling
07/09/2014CN203701949U 一种油井水平井大修井下动力装置 One kind of oil horizontal wells underground power plant overhaul
07/09/2014CN203701948U 潜孔钻具动力头 DTH drill power head
07/09/2014CN102828690B 步履式双回旋潜孔钻机 Walking double roundabout submersible drilling rig
07/09/2014CN102282333B 阀控井底马达 VRLA downhole motor
07/08/2014US8770318 Drilling motor with a locking collet sleeve stabilizer
07/08/2014US8770317 Center discharge gas turbodrill
07/08/2014CA2715497C Wellsite systems utilizing deployable structure
07/07/2014CA2838720A1 Electric motor systems and methods
07/03/2014WO2014105072A1 Downhole drilling assembly having a hydraulically actuated clutch and method for use of same
07/03/2014WO2014105053A1 Downhole bladeless generator
07/03/2014WO2014105034A1 Systems and methods of adjusting weight on bit an balancing phase
07/03/2014WO2014104608A1 Shock absorbing device for hydraulic rotary hitting apparatus
07/03/2014US20140182938 Piston strike face and bit interface for percussion hammer drill
07/02/2014EP2748427A2 Multi-scheme downhole tool bus system and methods
07/02/2014EP2748401A2 Downhole motors and pumps with improved stators and methods of making and using same
07/02/2014EP2748400A1 Fuel tank
07/02/2014CN203685022U 一种液动冲击器 One kind of hydraulic impactor
07/02/2014CN103899243A 一种螺杆钻具传动轴总成 A screw drill shaft assembly
06/2014
06/26/2014WO2014100255A1 Repetitive pulsed electric discharge apparatuses and methods of use
06/26/2014WO2014099789A1 Progressive cavity based control system
06/26/2014WO2014099783A1 Motor control system
06/26/2014WO2014099390A1 System and method for conveying
06/26/2014WO2014098899A1 Anti-reverse mechanism for mud motor
06/26/2014US20140175749 Device for producing a bore in the ground, rotary drive device and rotary seal arrangement
06/26/2014US20140174779 High frequency fluid driven drill hammer percussion drilling in hard formations
06/25/2014EP2744966A1 High frequency fluid driven drill hammer percussion drilling in hard formations
06/25/2014EP2744965A2 Bearing assemblies, apparatuses, and motor assemblies using the same
06/25/2014CN203669734U 一种双驱动同轴正反向增速输出螺旋入岩钻机 A dual driver coaxial output positive and negative growth spiral into rock drilling rig
06/25/2014CN203669733U 一种组合式潜孔锤 A modular DTH
06/25/2014CN103890304A 带有非对称波瓣的井下马达和泵 Downhole motors and pumps with asymmetrical lobes
06/25/2014CN103883247A 一种高频往复扭转发生器 A high-frequency reciprocating torsion generator
06/25/2014CN103883246A 井下高效螺杆钻具 High efficiency screw downhole drill
06/25/2014CN102587834B 钻具及桩工机械 Drilling and piling machinery
06/25/2014CN102536114B 机械式井下吸振冲击钻井工具 Mechanical vibration absorbing shock downhole drilling tool
06/25/2014CN102418473B 地下挖掘用挖掘装置、旋转式挖掘机和地下挖掘方法 Underground digging and digging, rotary excavator and underground mining methods
06/25/2014CN102373883B 一种潜水入岩钻机 A submerged into the rock drilling rig
06/24/2014US8757289 Underwater drilling arrangement and method for making a bore in a bed of a water body
06/24/2014US8757279 Pipe in pipe piston thrust system
06/19/2014WO2014092387A1 Hydraulic rotating impact apparatus
06/19/2014US20140170011 Bearing/Gearing Section For A PDM Rotor/Stator
06/19/2014US20140166370 Downhole Torque Limiting Assembly for Drill String
06/19/2014US20140166369 Gripper assembly for downhole tools
06/19/2014US20140166365 Compressible bearing assembly for downhole tools and methods of operation of same
06/18/2014EP2743445A1 Downhole power system
06/18/2014CN203655149U 螺杆钻具油密封主轴总成 Screw drill spindle oil seal assembly
06/18/2014CN103867118A Downhole drill transmission device
06/17/2014US8752645 Electric power tool with communication line to battery pack
06/17/2014CA2710728C Systems and methods for automatic forward phasing determination in a downhole pump system
06/14/2014CA2835675A1 Compressible bearing assembly for downhole tools and methods of operation of same
06/13/2014CA2836182A1 Downhole drilling tool
06/12/2014WO2014089457A2 Downhole drilling assembly with motor powered hammer and method of using same
06/12/2014WO2014087371A1 Control of managed pressure drilling
06/12/2014WO2014087370A1 Control of managed pressure drilling
06/12/2014US20140158426 Downhole Motors Having Adjustable Power Units
06/11/2014EP2739810A2 Drilling tool for laying a tube in the ground
06/11/2014CN103857867A Downhole motors and pumps with improved stators and methods of making and using same
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