EP 2092153 A2 20090826 - SYSTEM FOR STEERING A DRILL STRING
Title (en)
SYSTEM FOR STEERING A DRILL STRING
Title (de)
SYSTEM ZUR LENKUNG EINES BOHRGESTÄNGES
Title (fr)
SYSTÈME POUR DIRIGER UN TRAIN DE TIGES DE FORAGE
Publication
Application
Priority
- US 2007086323 W 20071204
- US 61131006 A 20061215
- US 66834107 A 20070129
- US 67387207 A 20070212
- US 83732107 A 20070810
Abstract (en)
[origin: WO2008076625A2] In one aspect of the present invention, a drill bit assembly has a body portion intermediate a shank portion and a working portion The working portion has at least one cutting element and at least a portion of a shaft is disposed within the body portion and protrudes from the working portion The shaft has a distal end rotationally isolated from the body portion and is in communication with a subterranean formation A motor is adapted to rotationally control the distal end.
IPC 8 full level
E21B 10/26 (2006.01); E21B 4/00 (2006.01); E21B 4/04 (2006.01); E21B 7/06 (2006.01); E21B 10/16 (2006.01); E21B 41/00 (2006.01)
CPC (source: EP)
E21B 4/006 (2013.01); E21B 4/04 (2013.01); E21B 7/06 (2013.01); E21B 7/062 (2013.01); E21B 7/064 (2013.01); E21B 7/068 (2013.01); E21B 41/0085 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008076625 A2 20080626; WO 2008076625 A3 20090226; AU 2007334141 A1 20080626; AU 2007334141 B2 20140306; BR PI0718338 A2 20131119; CA 2672658 A1 20080626; CA 2672658 C 20140708; CN 101563520 A 20091021; CN 101563520 B 20130410; EP 2092153 A2 20090826; EP 2092153 A4 20150325; MX 2009006368 A 20090826; MX 338284 B 20160411; MY 155017 A 20150828; NO 20092420 L 20090625
DOCDB simple family (application)
US 2007086323 W 20071204; AU 2007334141 A 20071204; BR PI0718338 A 20071204; CA 2672658 A 20071204; CN 200780046096 A 20071204; EP 07865141 A 20071204; MX 2009006368 A 20071204; MY PI20092369 A 20071204; NO 20092420 A 20090625