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)
09/2005
09/29/2005WO2005090739A1 Roller link toggle gripper for downhole tractor
09/29/2005WO2005090738A1 Drilling head with protective screen
09/29/2005WO2005090737A1 Water hammer
09/29/2005US20050211472 Percussion tool and method
09/29/2005US20050211471 System and method for controlling drill motor rotational speed
09/28/2005EP1579102A2 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
09/28/2005EP1579101A2 System for use in a bore hole for axially coupling a tubular end and a mandrel, and a connecting assembly for such a system
09/27/2005US6949025 Downhole motor universal joint assembly
09/22/2005US20050205250 Apparatus and methods for drilling with casing
09/20/2005US6945328 Lockable motor assembly for use in a well bore
09/15/2005WO2005084376A2 Rotating systems associated with drill pipe
09/13/2005US6942044 Three-dimensional steering tool for controlled downhole extended-reach directional drilling
09/13/2005CA2388762C Drilling apparatus
09/13/2005CA2351248C Balanced torque drilling system
09/08/2005US20050194187 Rotating systems associated with drill pipe
09/08/2005US20050194186 Apparatus and method for pressure-compensated telemetry and power generation in a borehole
09/07/2005EP1570156A2 Drilling a borehole
09/07/2005CN1218112C Method of creating well bore
09/06/2005US6938710 Bit head retaining system and method of installing a bit head in a percussion drill
09/06/2005US6938708 Electrically sequenced tractor
09/06/2005CA2287050C Rotating push rod boring system
09/01/2005US20050189146 Inverted motor for drilling rocks, soils and man-made materials and for re-entry and cleanout of existing wellbores and pipes
08/2005
08/31/2005EP1567724A2 Method and apparatus for sub-sea pile-driving
08/31/2005EP1436482A4 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles
08/30/2005US6935423 Borehole retention device
08/25/2005DE10392218T5 Kraftübertragungsmechanik, Schlagwerk mit Strömungsmittelantrieb und dessen Verwendung Power transmission mechanism, percussion with fluid drive and use thereof
08/23/2005CA2270224C Hydraulic impact tool for a well
08/11/2005US20050173158 Compressed air percussive mechanism for a down hole hammer and down hole hammer
08/11/2005US20050173157 Flow control valve
08/11/2005US20050173155 Down hole motor with locking mechanism
08/09/2005US6926102 Subsea controlled milling
08/04/2005WO2005071208A1 Downhole drilling of a lateral hole
08/04/2005US20050167160 Method and apparatus for horizontal drilling and oil recovery
08/04/2005CA2553236A1 Downhole drilling of a lateral hole
08/03/2005EP1559864A1 Downhole drilling of a lateral hole
08/02/2005US6923273 Well system
08/02/2005US6923270 Pneumatic impact piercing tool
08/02/2005CA2237513C Method and apparatus for creating positive pressure in a speed reduction tool used with a drilling turbine
07/2005
07/28/2005WO2005068773A1 Improved traction control for downhole tractor
07/28/2005US20050161259 Unsymmetrical profile threads for use in a positive displacement motor housing
07/28/2005US20050161213 Method of repair of collapsed or damaged tubulars downhole
07/26/2005US6920946 Inverted motor for drilling rocks, soils and man-made materials and for re-entry and cleanout of existing wellbores and pipes
07/26/2005US6920936 Constant force actuator
07/21/2005WO2004074637A3 Sleeve piston fluid motor
07/21/2005CA2455543A1 Method of reducing wear in a backup seal sealing a bearing chamber of a downhole tool
07/14/2005US20050150670 Method and system for operating a reversible pneumatic ground piercing tool
07/13/2005CN1639440A Bi-directional thruster pig apparatus and method of utilizing same
07/12/2005CA2041000C Transmission sleeve for a down hole hammer
07/07/2005WO2005061835A1 Method for drilling and lining a wellbore
07/07/2005US20050145415 Traction control for downhole tractor
07/07/2005CA2550194A1 Method for drilling and lining a wellbore
07/06/2005EP1550788A2 Three dimensional steerable system
07/06/2005EP1549819A1 A down-the hole hammer
07/05/2005US6913091 Method and apparatus for replacement of underground pipe
06/2005
06/30/2005US20050142015 Hydraulic automatic boosting pump
06/29/2005EP1545839A1 Sonic drill
06/28/2005US6910542 Acoustic flow pulsing apparatus and method for drill string
06/23/2005WO2005056970A1 Apparatus for facilitating formation of a borehole and pile driving
06/23/2005US20050133271 Method for construction of low thermal expansion and low resistance wire for logging applications
06/21/2005US6907927 Method and apparatus to vibrate a downhole component
06/16/2005US20050126828 Self-blocking fishing device
06/16/2005US20050126822 Drilling systems
06/16/2005DE10352747A1 Percussion drill for drilling deep bore has cylinder with two sets of control apertures inside outer casing and has pressure air reservoir and striker piston with valve system
06/15/2005EP1541801A2 Method and apparatus to vibrate a downhole component
06/15/2005EP1540219A2 Method and apparatus for replacement of underground pipe
06/15/2005CN1628207A Well system
06/14/2005CA2285759C Adjustable gauge downhole drilling assembly
06/12/2005CA2472857A1 Self-blocking fishing device
06/09/2005DE10351386A1 Getriebe und Verfahren zur Steuerung eines Innendrucks in dem Getriebe Transmission and method for controlling an internal pressure in the transmission
06/07/2005CA2091022C Down-the-hole drilling machine
06/02/2005US20050115741 Well system
05/2005
05/24/2005US6896075 Apparatus and methods for drilling with casing
05/17/2005US6892834 Piloted drill barrel and method of using same
05/12/2005WO2005042912A1 Electrical drill for drilling oil and gas wells (variants)
05/12/2005WO2004097160B1 System and method using a continuously variable transmission to control one or more system components
05/12/2005US20050098350 Three dimensional steering system and method for steering bit to drill borehole
05/11/2005EP1529924A1 Pressurized gerabox and method of regulating pressure inside said gearbox
05/11/2005EP1438477B1 Down-the-hole drill hammer
05/11/2005CN1614160A Gear unit and method for controlling an internal pressure in the gear unit
05/10/2005CA2166877C An apparatus for applying additional momentum
05/05/2005US20050092525 Down-hole vane motor
05/05/2005US20050091885 Gear unit and method for controlling an internal pressure in the gear unit
05/04/2005DE10234338B4 Vorrichtung zum Vortreiben von Bohrungen im Erdreich Apparatus for propelling holes in the ground
05/04/2005DE10234337B4 Vorrichtung zum Vortreiben von Bohrungen im Erdreich Apparatus for propelling holes in the ground
05/04/2005CN1612973A Fluid distributor device for down-hole-drills
04/2005
04/28/2005US20050087343 Motor Protector
04/27/2005EP1525370A2 Device for advancing drillings in the ground
04/27/2005CN1199338C Improved coring drill motor and method for obtaining core sample of matter
04/26/2005US6883618 Variable timing for front chamber of pneumatic hammer
04/24/2005WO2005017305A1 Angle and reactive torque control device for a gerotor type motor provided with a spindle and drilling bit in a bended drill string
04/21/2005WO2003060282A3 Method and apparatus for replacement of underground pipe
04/21/2005US20050082055 Gripper assembly for downhole tools
04/20/2005CN1607315A Flexible compound orienting screw drill
04/13/2005CN1605709A Down-hole traction apparatus for directional or horizontal well
04/12/2005CA2321072C Electro-hydraulically controlled tractor
04/06/2005CN2690553Y Open-air down-the-hole drill
03/2005
03/29/2005CA2356576C An improved coring bit motor and method for obtaining a material core sample
03/24/2005US20050065759 Lumping and delumping method for describing hydrocarbon-containing fluids
03/24/2005DE10339868A1 Hammer drill bit has a pin that moves back and forth under pressure within a control sleeve
03/23/2005CN2687302Y High power unit head
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