EP 0531446 B1 19940810 - DOWNHOLE FLUID MOTOR COMPOSITE TORQUE SHAFT.
Title (en)
DOWNHOLE FLUID MOTOR COMPOSITE TORQUE SHAFT.
Title (de)
DREHMOMENTWELLE AUS VERBUNDWERKSTOFF FÜR EINEN MIT FLÜSSIGKEITBETRIEBENEN BOHRLOCHMOTOR.
Title (fr)
ARBRE DE TORSION COMPOSITE POUR MOTEUR A FLUIDE DE FOND DE TROU.
Publication
Application
Priority
- US 9104027 W 19910607
- US 53489290 A 19900607
Abstract (en)
[origin: WO9119072A1] This invention relates to a composite torque shaft (41) for connecting a downhole fluid motor (20) to the drill bit (30) at the end of a drill string. The composite torque shaft comprises an elongate matrix body with oriented fibers fixed therein. The fibers are particularly oriented to provide the composite torque shaft (41) with significant torque strength and stiffness while allowing bending flexibility. Accordingly, the composite torque shaft converts the gyrating and rotating motion of the rotor in the fluid motor to the pure rotation of the drill bit.
IPC 1-7
IPC 8 full level
CPC (source: EP)
E21B 4/02 (2013.01); E21B 7/068 (2013.01)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
WO 9119072 A1 19911212; AU 8056291 A 19911231; DE 69103417 D1 19940915; DE 69103417 T2 19941201; EP 0531446 A1 19930317; EP 0531446 B1 19940810; JP H05508690 A 19931202
DOCDB simple family (application)
US 9104027 W 19910607; AU 8056291 A 19910607; DE 69103417 T 19910607; EP 91911714 A 19910607; JP 51148691 A 19910607