EP 2859172 A1 20150415 - DRILL BIT WITH HYDRAULICALLY ADJUSTABLE AXIAL PAD FOR CONTROLLING TORSIONAL FLUCTUATIONS
Title (en)
DRILL BIT WITH HYDRAULICALLY ADJUSTABLE AXIAL PAD FOR CONTROLLING TORSIONAL FLUCTUATIONS
Title (de)
BOHRMEISSEL MIT HYDRAULISCH EINSTELLBAREM AXIALKISSEN ZUR STEUERUNG VON TORSIONALEN SCHWANKUNGEN
Title (fr)
TRÉPAN COMPORTANT UN TAMPON AXIAL À RÉGLAGE HYDRAULIQUE POUR COMMANDER LES FLUCTUATIONS DE TORSION
Publication
Application
Priority
- US 201213489563 A 20120606
- US 2013044487 W 20130606
Abstract (en)
[origin: WO2013188206A1] In one aspect, a drill bit is disclosed that, in one configuration, includes one or more cutters on a surface thereon configured to penetrate into a formation, at least one pad at the surface, an actuation device configured to supply a fluid under pressure to the pad to extend the pad from the surface, and a relief device configured to drain fluid supplied to the pad to reduce the pressure on the at least one pad when the force applied on the at least one pad exceeds a selected limit.
IPC 8 full level
E21B 10/26 (2006.01); E21B 4/02 (2006.01); E21B 10/38 (2006.01); E21B 17/10 (2006.01)
CPC (source: CN EP)
E21B 10/62 (2013.01 - CN EP); E21B 47/09 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2013188206 A1 20131219; BR 112014030612 A2 20170627; BR 112014030612 B1 20210302; CA 2875197 A1 20131219; CA 2875197 C 20190108; CN 104508230 A 20150408; CN 104508230 B 20170707; EP 2859172 A1 20150415; EP 2859172 A4 20160120; IN 10334DEN2014 A 20150807; MX 2014014906 A 20150610; SG 11201408079U A 20150129
DOCDB simple family (application)
US 2013044487 W 20130606; BR 112014030612 A 20130606; CA 2875197 A 20130606; CN 201380039524 A 20130606; EP 13804590 A 20130606; IN 10334DEN2014 A 20141204; MX 2014014906 A 20130606; SG 11201408079U A 20130606