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)
02/2006
02/23/2006DE10146023B4 Steuerung für einen Schlagantrieb Control for an impact driver
02/22/2006CN2760212Y Eccentric wear proof screw drill
02/22/2006CN2760211Y Composite plating screw drill
02/22/2006CN2760210Y A totally enclosed screw drill drive shaft
02/21/2006US7002261 Downhole electrical submersible power generator
02/21/2006US7000693 Control of hydrocarbon wells
02/21/2006CA2315043C Methods of making stators for moineau pumps
02/21/2006CA2253448C Hammer device
02/16/2006US20060034666 Rod pulling and pushing machine for pipe bursting
02/15/2006CN1734052A Method for forming concrete pile by means of reverse circulation hole-flushing and drilling system
02/09/2006WO2006012731A2 Integrated magnetic ranging tool
02/09/2006US20060028321 Integrated magnetic ranging tool
02/08/2006CN2756802Y Hydraulic control system for down-the-hole drill travel
02/07/2006US6994175 Hydraulic drill string
02/07/2006CA2411989C Optimized fiber reinforced liner material for positive displacement drilling motors
02/02/2006WO2006010877A1 System and method for drilling wellbores
02/02/2006CA2572779A1 System and method for drilling wellbores
02/01/2006EP1620629A2 System and method using a continuously variable transmission to control one or more system components
01/2006
01/31/2006CA2336421C Gripper assembly for downhole tools
01/26/2006WO2006008723A2 A down-the-hole hammer
01/26/2006WO2005098192A3 Improvements in or relating to rock drilling equipment
01/25/2006CN1726334A System for use in a bore hole for axially coupling a tubular end and a mandrel, and a connecting assembly for such a system
01/19/2006WO2006006867A1 A jar device for use in coil tubing drilling
01/19/2006WO2006005916A2 Closed loop control bore hole drilling system
01/19/2006US20060011362 Power transmission unit of an impactor, a hydraulic jet impactor and the application thereof
01/18/2006EP1423582B1 Assembly for drilling low pressure formation
01/18/2006CN1723329A Bore hole tool assembly, bearing system for use in such a bore hole tool assembly, and method of designing such a bore hole tool assembly
01/17/2006US6986394 Reciprocable impact hammer
01/11/2006EP1614854A1 Method and apparatus for deforming a metal workpiece while exerting ultrasonic oscillations
01/11/2006EP1336025B1 Hydraulic cam motor
01/05/2006US20060000646 Down-the hole hammer
01/05/2006US20060000645 Driver
01/05/2006US20060000643 Top drive torsional baffle apparatus and method
01/04/2006EP1611310A1 A hydraulic drill string device, in particular a hydraulic in-hole rock drilling machine
12/2005
12/28/2005EP1412607B1 Downhole motor lock-up tool
12/22/2005WO2005121494A1 Device for a rock drilling machine
12/21/2005EP1303679B1 Ram drill
12/21/2005EP0862682B1 Autonomous downhole oilfield tool
12/21/2005CN2747351Y All hydraulic down hole drill head
12/20/2005CA2411535C Optimized liner thickness for positive displacement drilling motors
12/20/2005CA2178814C An in-hole rock drilling machine
12/20/2005CA2178813C A hydraulic impact motor
12/20/2005CA2156167C Pressure reversing valve for a fluid-actuated, percussive drilling apparatus
12/20/2005CA2135786C Improved drilling arrangement and method
12/15/2005WO2005119885A1 A frameless switched reluctance motor and application as a top drive for a rotary pump
12/14/2005EP1605133A1 Pneumatic hammer
12/14/2005CN1231652C Oil storage compensation rubber sealing drive shaft having thrust conical roller bearing
12/08/2005WO2005116484A2 Chain drive system
12/08/2005US20050269889 Frameless switched reluctance motor and application as a top drive for a rotary pump
12/07/2005EP1478824A4 Well system
12/01/2005US20050263325 Chain drive system
11/2005
11/29/2005US6968911 Apparatus and methods for drilling
11/29/2005US6968904 Method and apparatus for operations in underground/subsea oil and gas wells
11/29/2005CA2181177C Downhole motor for a drilling apparatus
11/24/2005WO2005111366A1 A reciprocable impact hammer
11/24/2005US20050257941 Pneumatic impact piercing tool
11/24/2005CA2564935A1 A reciprocable impact hammer
11/23/2005EP1485570A4 Thrust control apparatus
11/22/2005CA2320558C Motion compensator for drilling from a floater
11/22/2005CA2206169C A bit retention device for a bit and chuck assembly of a down-the-hole percussive drill
11/17/2005US20050252686 Electrically sequenced tractor
11/17/2005US20050252671 Pneumatic hammer
11/17/2005CA2506840A1 Pneumatic hammer
11/16/2005EP1234091B1 Downhole device
11/10/2005US20050247490 Cutting edge apparatus
11/10/2005US20050247488 Roller link toggle gripper and downhole tractor
11/10/2005DE102005005289A1 Downhole motor for drilling well bores, has housing operatively connectable at upper end to drilling string, shaft, and locking mechanism to selectively transmit torque from housing to shaft when engaged
11/08/2005US6962213 Sleeve piston fluid motor
11/03/2005US20050244229 Method and apparatus for replacement of underground pipe
11/03/2005US20050241859 Bedrock drilling and excavating apparatus
11/03/2005US20050241842 Reciprocable impact hammer
11/01/2005US6961251 Waveform independent high frequency power system
11/01/2005US6959760 Downhole pulser
11/01/2005CA2245359C Pressure modulation valve assembly
11/01/2005CA2155506C Reversible casing for a down-the-hole percussive apparatus
10/2005
10/27/2005WO2005100732A1 A telescopic conductor casing for a well installation and a method of driving same into the underground
10/27/2005WO2005100731A1 System and method for controlling drill motor rotational speed
10/27/2005US20050236190 Acoustic flow pulsing apparatus and method for drill string
10/27/2005US20050236189 Coiled tubing directional drilling apparatus
10/27/2005CA2562891A1 A telescopic conductor casing for a well installation and a method of driving same into the underground
10/26/2005EP1589187A1 Bedrock drilling and excavating apparatus
10/26/2005CN1688785A Device for advancing drillings in the ground
10/20/2005WO2005098192A2 Improvements in or relating to rock drilling equipment
10/20/2005US20050230153 Device for simulataneously casing a hole while drilling
10/20/2005US20050230101 Method and apparatus to vibrate a downhole component
10/20/2005DE202005012724U1 Drop hammer drilling device, especially for overlap drilling, has overlap tube connected to drilling crown and casing tube between hammer and overlap tube that is preferably closed at bottom
10/20/2005DE202005012722U1 Hammer-drilling arrangement for drilling purposes comprises a hammer-drill head, a flushing medium supply unit, a drill pipe with a conveying channel for the drillings and an overlaying pipe connected to a drilling crown
10/19/2005CN2734972Y Valved high pressure pneumatic down-hole hammer
10/19/2005CN2734971Y Pneumatic down-hole hammer
10/18/2005US6955232 Equipment for drilling vertical boreholes
10/13/2005WO2005095752A1 Method and device for drilling holes in the ground or in rock
10/13/2005CA2560829A1 Method and device for drilling holes in the ground or in rock
10/12/2005EP1157187B1 Moulten bath drilling method
10/12/2005CN2732974Y Down-the-hole drill
10/11/2005US6953098 Hydraulic drill string accumulator
10/11/2005US6953095 Method and system for operating a reversible pneumatic ground piercing tool
10/06/2005US20050217867 Apparatus to allow a coiled tubing tractor to traverse a horizontal wellbore
10/06/2005US20050217861 Apparatus to allow a coiled tubing tractor to traverse a horizontal wellbore
10/04/2005CA2314575C Anti-torque tool
10/01/2005CA2502496A1 Apparatus to allow a coiled tubing tractor to traverse a horizontal wellbore
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