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)
08/2008
08/28/2008WO2008102280A1 Self-aligning open-hole tractor
08/28/2008US20080202768 Device for Selective Movement of Well Tools and Also a Method of Using Same
08/28/2008DE102007008373A1 Device for producing deep bores in earthy, pebbly or rocky subsoil with aid of boring system, has separate drive on bore-head, power supply, flexible flushing and supply line
08/27/2008EP1960122A1 A vibratory apparatus for a rotary-vibratory drill
08/27/2008EP1339938B1 Boring apparatus
08/26/2008US7416034 Drive system
08/21/2008US20080196901 Self-Aligning Open-Hole Tractor
08/21/2008US20080196880 Electric submersible pump and motor assembly
08/20/2008CN101245807A Long-life high-performance screw drill transmission shaft bearing
08/13/2008EP1466069B1 Downhole assembly releasable connection
08/13/2008CN101243600A Brushless motor commutation and control
08/13/2008CA2578388A1 Combined diretional and impact drilling motor
08/12/2008US7410013 Boring and drilling apparatus
08/12/2008US7410012 Hydraulic automatic boosting pump
08/07/2008WO2008092256A1 Down hole multiple piston tools operated by pulse generation tools and methods for drilling
08/07/2008WO2008072951A3 Drill head for the excavation in the ground of a pit, and a foundation system for the forming of a foundation pile in the ground
08/07/2008US20080185186 Drilling assembly
08/07/2008CA2667584A1 Down hole multiple piston tools operated by pulse generation tools and methods for drilling
08/06/2008EP1951984A1 Hammer drilling device with a pneumatic reversing gear
08/06/2008EP1386387B1 Downhole torque generator
08/06/2008CN100408804C System for use in a bore hole for axially coupling a tubular end and a mandrel, and a connecting assembly for such a system
08/05/2008US7407020 Rotating systems associated with drill pipe
07/2008
07/31/2008WO2008091157A1 Device for transport of tools in wellbores and pipelines
07/31/2008DE19939000B4 Einrichtung zur Verminderung von Druckschwankungen und/oder Druckstößen an hydraulisch betriebenen Schlagaggregaten Device for reducing pressure fluctuations and / or pressure surges to hydraulically driven percussion units
07/30/2008EP1948900A2 Thread securer
07/29/2008US7404458 Rotary percussive drilling device
07/29/2008CA2487100C Apparatus and method to reduce fluid pressure in a wellbore
07/24/2008WO2008089001A1 Wellbore fluids for casing drilling
07/23/2008EP1730381A4 Water hammer
07/23/2008EP1669539B1 Angle and reactive torque control device for a gerotor type motor provided with a spindle and drilling bit in a bended drill string
07/23/2008CN201090135Y Combined drilling tool
07/22/2008CA2364895C Metal melt boring process
07/22/2008CA2302977C Hydraulic drilling jar
07/16/2008EP1943407A1 Backhead and drill assembly with backhead
07/16/2008CN201087695Y High wind pressure downhole air hammer
07/16/2008CN201087694Y Safe and reliable long-life screw drill
07/16/2008CN101223333A A drill bit assembly for fluid-operated percussion drill tools
07/15/2008CA2499381C Apparatus and method for pressure-compensated telemetry and power generation in a borehole
07/15/2008CA2366118C Core barrel
07/10/2008WO2008081404A1 Coiled tubing tractor assembly
07/10/2008WO2008081402A1 Hydraulically driven tractor
07/10/2008US20080164066 Method and device for producing a cased string bore
07/09/2008EP1941598A1 Top drive drilling system and other applications using a low speed direct drive ac motor
07/09/2008EP1941123A1 Extended reach drilling apparatus and method
07/09/2008CN101215954A High sealing property screw drill driving-shaft assembly
07/09/2008CN100400241C Method of generating stress pulse in tool by means of pressure fluid operated impact device, and impact device
07/08/2008US7395883 Keyed connection for drill bit
07/08/2008US7395877 Apparatus and method to reduce fluid pressure in a wellbore
07/03/2008US20080156540 Backhead and Drill Assembly with Backhead
07/03/2008US20080156539 Non-rotating drill system and method
07/01/2008US7392859 Roller link toggle gripper and downhole tractor
06/2008
06/26/2008US20080149394 Steering system
06/24/2008US7389829 Method and apparatus for forming bored hole
06/19/2008WO2008072951A2 Drill head for the excavation in the ground of a pit, and a foundation system for the forming of a foundation pile in the ground
06/19/2008WO2008043985A3 Method and apparatus for running tubulars
06/19/2008US20080142263 Downhole Valve Mechanism
06/19/2008DE102005015886B4 Bohrhammer Rotary Hammer
06/18/2008EP1931852A1 Bearing elements, bearing apparatuses including same, and related methods
06/18/2008CN101200995A Underground plumb orienting drill
06/17/2008CA2560774C Water hammer
06/17/2008CA2272798C Method of earth drilling using a sealed downhole bearing assembly, method of sealing a downhole bearing assembly and a downhole bearing assembly
06/12/2008WO2008069089A1 Excavator for underground excavating, rotary excavator and underground excavating method
06/12/2008US20080135295 Fluid-actuated Hammer Bit
06/11/2008CN201071680Y Petroleum net electric drill
06/10/2008US7383898 Inner and outer motor with eccentric stabilizer
06/05/2008US20080128168 Apparatus and Method
06/05/2008US20080128140 Methods and apparatus for wellbore construction and completion
06/05/2008US20080128128 Methods and apparatus to convey electrical pumping systems into wellbores to complete oil and gas wells
06/04/2008EP1926881A1 A percussion hammer for enlarging drilled holes
05/2008
05/27/2008US7378769 Electric motors for powering downhole tools
05/27/2008US7377338 Downhole percussion tool
05/27/2008US7377337 Downhole drilling tool
05/22/2008WO2008061100A1 Variable linkage assisted gripper
05/22/2008WO2008061071A2 System, apparatus and method for abrasive jet fluid cutting
05/22/2008US20080115976 Thrust bearing assembly
05/22/2008CA2669151A1 Variable linkage assisted gripper
05/21/2008EP1923535A1 Downhole check valve comprising a burst disk
05/21/2008EP1730386A4 Rotating systems associated with drill pipe
05/21/2008CN201062489Y Hydraulic shocker
05/21/2008CN201062488Y Novel air down-hole hammer eccentric casing drilling tools
05/14/2008EP1497526B1 Bi-directional thruster pig apparatus and method of utilizing same
05/08/2008US20080105422 Compact well pumping unit actuated by linear motor with counterweight directly attached to slider
05/07/2008CN201056983Y Stator housing of screw drill
05/07/2008CN101173599A Supporting node for turbo-drill
05/06/2008CA2450879C Apparatus for and method of radial expansion of a tubular member
05/02/2008WO2008051132A1 Air actuated down- the -hole hammer and drill bit and foot valve for use in the hammer
05/02/2008CA2665235A1 Air actuated down-the-hole hammer and drill bit and foot valve for use in the hammer
05/01/2008US20080099248 Bore head for microbore operation
05/01/2008US20080099247 Regulator Of Angle And Reactive Moment Of A Gerotor Type Motor Having A Spindle And Drilling Bit In A Bent Drilling String
04/2008
04/30/2008CN201053474Y Universal axis
04/29/2008CA2295463C Hydraulic in-the-hole percussion rock drill
04/22/2008US7360609 Directional drilling apparatus
04/22/2008CA2238334C Autonomous downhole oilfield tool
04/17/2008WO2008043985A2 Method and apparatus for running tubulars
04/17/2008CA2666465A1 Method and apparatus for running tubulars
04/16/2008EP1910640A1 A drill bit assembly for fluid-operated percussion drill tools
04/16/2008CN201047254Y Novel screw drilling tool
04/15/2008US7357195 Power tool and gear unit assembled therein
04/15/2008CA2282342C Bottomhole assembly and methods of use
04/10/2008WO2008041906A1 Percussion device and rock drilling machine
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