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)
09/2003
09/04/2003US20030164253 Fluid drilling system
09/03/2003EP1339938A2 Boring apparatus
08/2003
08/27/2003EP1337759A2 Hydraulic drill string accumulator
08/27/2003CN1119499C Downhole milling device
08/26/2003US6609577 Percussive rotational impact hammer
08/21/2003WO2003069115A2 Method of repair of collapsed or damaged tubulars downhole
08/21/2003WO2003069109A1 Compressed air percussive mechanism for a down hole hammer and down hole hammer
08/21/2003US20030155118 Method of repair of collapsed or damaged tubulars downhole
08/20/2003EP1336025A1 Hydraulic cam motor
08/20/2003EP1088149B1 Percussive down-the-hole rock drilling hammer, and a piston used therein
08/20/2003CN2567859Y Underground electric generator for well drilling
08/20/2003CN2567332Y Building combined turbine joint
08/20/2003CN1437674A System for creating conduit in a borehole formed in an earth formation
08/19/2003US6607044 Three dimensional steerable system and method for steering bit to drill borehole
08/19/2003US6607043 Down hole motors and methods for their operation
08/14/2003WO2003067018A2 Well system
08/14/2003WO2003067016A2 Bi-directional thruster pig apparatus and method of utilizing same
08/14/2003US20030151298 Equipment for drilling vertical boreholes
08/14/2003CA2755094A1 Well system
08/13/2003EP1334258A1 Percussive down-the-hole hammer for rock drilling, and a drill bit used therein
08/13/2003CN2565961Y Power drilling tool drive shaft with four-point angular contact thrust ball bearing
08/12/2003US6604921 Optimized liner thickness for positive displacement drilling motors
08/07/2003US20030146001 Apparatus and method to reduce fluid pressure in a wellbore
08/06/2003EP1333151A2 Liner of optimized thickness for positive displacement drilling motors
08/05/2003US6601652 Puller-thruster downhole tool
07/2003
07/31/2003WO2003062586A1 Down-the-hole drill hammer.
07/31/2003WO2003062585A1 Driver
07/31/2003CA2470227A1 Down-the-hole drill hammer.
07/31/2003CA2470211A1 Driver
07/30/2003CN2563287Y Electric drilling machine without drilling rod
07/29/2003US6598687 Three dimensional steerable system
07/24/2003WO2003060282A2 Method and apparatus for replacement of underground pipe
07/24/2003US20030138338 Optimized liner thickness for positive displacement drilling motors
07/23/2003EP0862679B1 Downhole equipment
07/17/2003WO2003058023A1 A power transmission unit of an impactor, a hydraulic jet impactor and the application thereof
07/15/2003US6591920 Moulten bath drilling method
07/15/2003CA2085425C Down-the-hole drill
07/10/2003WO2003056128A1 Apparatus for translating a rotary expander tool downhole
07/10/2003US20030127251 Flexible hose with thrusters for horizontal well drilling
07/08/2003US6588518 Drilling method and measurement-while-drilling apparatus and shock tool
07/08/2003US6588516 Method and apparatus for directional boring under mixed conditions
07/08/2003US6588509 Well casing installation and removal apparatus and method
07/08/2003US6588315 Ram device
07/03/2003US20030121703 Electrically sequenced tractor
07/03/2003US20030121655 Threaded apparatus for selectively translating rotary expander tool downhole
06/2003
06/26/2003US20030116356 Gripper assembly for downhole tools
06/24/2003US6583992 High frequency power system and related methods
06/19/2003WO2003050378A1 A percussive downhole hammer and piston design for such a hammer
06/19/2003WO2003050375A2 Thrust control apparatus
06/19/2003US20030111269 Downhole mud motor
06/19/2003US20030111240 Downhole percussion drills
06/12/2003WO2003048501A2 Downhole assembly releasable connection
06/12/2003US20030108393 System for creating a conduit in a borehole formed in an earth formation
06/10/2003US6575236 Device for manipulating a tool in a well tubular
06/05/2003US20030102167 Bit retention system
06/05/2003US20030102164 Thrust control apparatus
06/05/2003US20030102132 Downhole assembly releasable connection
06/04/2003EP1315880A1 Percussive down-the-hole hammer for rock drilling, a top sub used therein and a method for adjusting air pressure
06/03/2003US6571888 Apparatus and method for directional drilling with coiled tubing
06/03/2003US6571870 Method and apparatus to vibrate a downhole component
05/2003
05/28/2003EP1314851A2 Apparatus for completing a subterranean well and method of using same
05/27/2003US6568489 Apparatus and method for downhole lubrication replenishment
05/22/2003WO2003042490A1 Fluid distributor device for down-hole-drills
05/22/2003US20030094310 Three dimensional steerable system and method for steering bit to drill borehole
05/21/2003EP1040231B1 Soil consolidation apparatus, tool and method
05/21/2003CN2551755Y Oil storage compensation rubber closed drive shaft with cylinder roll thrust bearing
05/21/2003CN2551754Y Oil storage compensation rubber closed drive shaft with thrust conic roll bearing
05/21/2003CN2551753Y Oil Storage compensation simple sealed drive shaft with multiple rows of thrust ball bearing
05/14/2003CN2550949Y Motor casing special for concrete drill
05/14/2003CN2550477Y Jet flow type impact device
05/13/2003US6561777 Downhole roller vane motor and roller vane pump
05/13/2003US6561290 Downhole mud motor
05/13/2003US6561289 Bottomhole assembly and methods of use
05/13/2003US6561280 Method of injecting tubing down pipelines
05/07/2003CN2549153Y Downhole power shaft with metal rubber thrust bearings and rolling bearings
05/07/2003CN1416497A Method and appts. for directional boring under mixed conditions
05/06/2003US6557653 Working tool for a percussion power tool
05/06/2003CA2042328C Balanced sleeve control choke
05/02/2003EP1012440B1 Boring device
04/2003
04/24/2003US20030075362 Turbodrill
04/24/2003US20030075361 Well system
04/24/2003US20030075321 Downhole device
04/23/2003EP1303679A1 Ram drill
04/23/2003CN1413285A Three dimensional steerable system
04/22/2003US6550554 Rock drill
04/22/2003CA2278526C Bottom rotation shaft actuator
04/22/2003CA2271509C Conveying a tool along a non-vertical well
04/17/2003WO2003031761A1 Down-the-hole drill hammer
04/17/2003CA2463258A1 Down-the-hole drill hammer
04/16/2003EP0958446B1 Method and device for driving bore-holes, specially for prospection and extraction drillings
04/16/2003CN2545350Y Electric water injection pump set
04/10/2003WO2003029601A2 Percussive rotational impact hammer
04/10/2003US20030066684 Enlargement drilling system
04/09/2003EP1300543A1 Underreamer drilling system
04/08/2003US6543557 Drill hammer assembly
04/08/2003US6543132 Methods of making mud motors
04/03/2003WO2003027433A1 An inverted motor for drilling
04/03/2003US20030062176 Percussive rotational impact hammer
04/02/2003EP0927294B1 Coupling piece for use at simultaneous earth and/or rock drilling with an upper rotary percussion device and a lower percussion device
04/02/2003CN1406699A Electric tool with battery catapult
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