EP 1923534 B1 20101110 - Steerable bit assembly and methods
Title (en)
Steerable bit assembly and methods
Title (de)
Steuerbare Bohrmeißelanordnung und entsprechende Verfahren
Title (fr)
Ensemble trépan orientable et procédés
Publication
Application
Priority
- EP 04783755 A 20040913
- US 50305303 P 20030915
Abstract (en)
[origin: EP1923534A1] A drilling system includes a steerable bottomhole assembly (BHA) (108) having a steering unit (120) and a control unit (122) that provide dynamic control of drill bit (112) orientation or tilt. Exemplary steering units (120) can adjust bit orientation at a rate that approaches or exceeds the rotational speed of the drill string (110) or drill bit (112), can include a dynamically adjustable articulated joint having a plurality of elements that deform in responds to an excitation signal, can include adjustable independently rotatable rings for selectively tilting the bit, and/or can include a plurality of selectively extensible force pads. The force pads are actuated by a shape change material that deforms in response to an excitation signal.
IPC 8 full level
E21B 7/06 (2006.01); E21B 10/60 (2006.01); E21B 10/61 (2006.01); E21B 10/62 (2006.01); E21B 17/10 (2006.01)
CPC (source: EP)
E21B 7/067 (2013.01); E21B 10/61 (2013.01); E21B 10/62 (2013.01); E21B 17/1014 (2013.01)
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
EP 1923534 A1 20080521; EP 1923534 B1 20101110; EP 1933003 A1 20080618; EP 1933003 B1 20101110
DOCDB simple family (application)
EP 08001582 A 20040913; EP 08001569 A 20040913