E21B 4 - Drives for drilling, used in the borehole

Patents for E21B 4 - Drives for drilling, used in the borehole (6,032)
12/2006
12/27/2006	EP1735520A2 Improvements in or relating to rock drilling equipment
12/27/2006	CN1292143C Transmission shaft with metal rubber thrust bearing and rolling bearing for downhole power drill
12/27/2006	CN1292142C Intermediate spindle section with diamond thrust bearing for turbodrill
12/26/2006	US7152698 Downhole motor locking assembly and method
12/21/2006	WO2006134446A2 Novel activating mechanism for controlling the operation of a downhole tool
12/21/2006	WO2005084376A3 Rotating systems associated with drill pipe
12/21/2006	US20060283636 Fluid driven drilling motor and system
12/21/2006	DE102005026921A1 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
12/21/2006	CA2612285A1 Novel activating mechanism for controlling the operation of a downhole tool
12/19/2006	CA2322693C An arrangement for drilling slots
12/14/2006	WO2006088743B1 Radial expansion of a wellbore casing against a formation
12/14/2006	US20060278439 Thrust bearing assembly
12/14/2006	US20060278405 Method and apparatus for friction reduction in a downhole tool
12/13/2006	EP1730386A2 Rotating systems associated with drill pipe
12/13/2006	EP1730382A1 Method and device for drilling holes in the ground or in rock
12/13/2006	EP1730381A1 Water hammer
12/09/2006	CA2549500A1 Thrust bearing assembly
12/05/2006	US7143843 Traction control for downhole tractor
11/2006
11/30/2006	WO2006126886A1 A device for selective movement of well tools and also a method of using same
11/30/2006	CA2604355A1 A device for selective movement of well tools and also a method of using same
11/29/2006	EP1725737A1 Drilling head with protective screen
11/28/2006	US7141901 Downhole torque-generating and generator combination apparatus
11/23/2006	US20060263215 Roll stabilised unit
11/22/2006	CN1286248C Impact electric tool machine
11/22/2006	CN1285825C Radiation well horizontal radiation pipe full hydraulic construction equipment
11/21/2006	CA2547036A1 Roll stabilished unit
11/16/2006	US20060257697 Fuel cell apparatus and method for downhole power systems
11/14/2006	US7134512 Method of downhole drilling and apparatus therefor
11/09/2006	WO2006119008A2 Method and apparatus for shifting speeds in a fluid-actuated motor
11/02/2006	WO2006116646A2 Exhaust valve and bit assembly for down-hole percussive drills
11/02/2006	US20060243493 Method and apparatus for shifting speeds in a fluid-actuated motor
11/02/2006	US20060243492 Inner and outer motor with eccentric stabilizer
11/02/2006	EP1315880B1 Percussive down-the-hole hammer for rock drilling, a top sub used therein and a method for adjusting air pressure
10/2006
10/31/2006	CA2283447C Liquid driven impact device
10/26/2006	US20060237234 Earth boring tool
10/26/2006	DE102005015886A1 Hammer drill, comprising special arrangement of differential piston and control element
10/25/2006	EP1295005B1 Milling of casing using coiled tubing
10/25/2006	CN1853029A Angle and reactive torque control device for a gerotor type motor provided with a spindle and drilling bit in a bended drill string
10/25/2006	CN1851229A Well drilling method of underground power drilling tool for geophysical prospecting
10/25/2006	CN1851228A Non-excavation underground pipeline tunnel wall tension propulsion machine
10/25/2006	CN1281845C System for carrying well equipment in the well
10/19/2006	WO2006088743A3 Radial expansion of a wellbore casing against a formation
10/18/2006	EP1334258B1 Percussive down-the-hole hammer for rock drilling, and a drill bit used therein
10/18/2006	CN1849436A Device for drilling a bore in the ground
10/18/2006	CN1280514C Earth formation surveying method
10/17/2006	US7121364 Tractor with improved valve system
10/17/2006	US7121362 Electrical hand tool with a position adjustable battery pack
10/12/2006	US20060225923 Drilling assembly and method for drilling a barehole into geological formations
10/10/2006	US7120565 Method and apparatus for determining figure
10/03/2006	US7114559 Method of repair of collapsed or damaged tubulars downhole
10/03/2006	CA2250483C Well system
09/2006
09/28/2006	US20060216178 Downhole motor seal and method
09/26/2006	US7111695 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium
09/26/2006	US7111692 Apparatus and method to reduce fluid pressure in a wellbore
09/26/2006	US7111678 Field adjustable impact jar
09/22/2006	CA2529648A1 Method and apparatus for introducing elongate members into the ground
09/20/2006	EP1702133A1 Method for drilling and lining a wellbore
09/20/2006	EP1656492A4 Downhole hammer drill
09/20/2006	CN1836088A Percussive drill with adjustable flow control
09/19/2006	US7110266 Multiple element rectification circuit
09/19/2006	CA2189834C Method and apparatus for navigational drilling with a downhole motor employing independent drill string and bottomhole assembly rotary orientation and rotation
09/17/2006	CA2538548A1 Methods and apparatus for placement of well equipment
09/14/2006	US20060201716 Gripper assembly for downhole tools
09/14/2006	CA2500155A1 Percussion adaptor for positive displacement motors
09/13/2006	EP1525370B1 Device for advancing drillings in the ground
09/13/2006	CN2816320Y Novel hidden-hole driller revolving device
09/13/2006	CN1274938C Storage lubricant compensated rubber sealed transmission shaft with cylinder roller thrust bearing
09/12/2006	US7104698 Thrust bearing for down-hole tool
09/07/2006	US20060196696 Electrically sequenced tractor
09/07/2006	US20060196694 Electrically sequenced tractor
08/2006
08/31/2006	WO2006089617A1 Method and apparatus suitable for hole cleaning during drilling operations
08/31/2006	WO2006089349A1 An apparatus for driving a shaft in an excavating device
08/31/2006	US20060191720 Stabilized down hole drilling motor
08/30/2006	EP1696101A1 Method and apparatus suitable for hole cleaning during drilling operations
08/30/2006	EP1171946B1 High frequency switch-mode dc powered computer system
08/30/2006	CN1826454A Downhole hammer drill
08/29/2006	US7096980 Rotary impact well drilling system and method
08/24/2006	US20060185864 Method of generating stress pulse in tool by means of pressure fluid operated impact device, and impact device
08/24/2006	CA2597909A1 Radial expansion of a wellbore casing against a formation
08/22/2006	US7093677 Percussion drill head
08/22/2006	US7093671 Pneumatic rock-boring device and method for starting such a device
08/22/2006	CA2366002C Three-dimensional steering tool for controlled downhole extended-reach directional drilling
08/16/2006	EP1430199B1 An inverted motor for drilling
08/16/2006	CN1819897A Method of generating stress pulse in tool by means of pressure fluid operated impact device, and impact device
08/16/2006	CN1270047C Drilling bit percussion apparatus for drill
08/15/2006	US7090039 Assembly for drilling low pressure formation
08/15/2006	US7090038 Bedrock drilling and excavating apparatus
08/15/2006	US7090037 Device for anchoring a drill string in a borehole
08/15/2006	US7090023 Apparatus and methods for drilling with casing
08/15/2006	US7089847 Hydraulic cam motor
08/15/2006	CA2331700C Pneumatic ground piercing tool with movable chisel head
08/15/2006	CA2268444C Apparatus and method for drilling boreholes
08/10/2006	WO2006082421A1 Apparatus and method
08/10/2006	US20060175095 Boring machine
08/10/2006	US20060175093 Method and device for boring holes in soil or rock
08/09/2006	EP1451437B1 Fluid distributor device for down-hole-drills
08/08/2006	US7086486 Flow control valve and method of controlling rotation in a downhole tool
08/08/2006	CA2251358C Wellbore tractor
08/03/2006	US20060171619 Bearing arrangement
08/02/2006	CN1811126A Agitator

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