DRILLING SHAFT DEFLECTION DEVICE

摘要

Drilling shaft deflection device (750) for establishing a deflection angle and azimuthal toolface direction of a drill bit (22) in a rotary steerable subterranean drill (20). The drilling shaft deflection device (750) includes a drilling shaft (24) rotatably supported in a housing (46) and a drilling shaft deflection assembly (92) contained within the housing (46) that transitions the drilling shaft (24) between deflected and undeflected configurations. The deflection device (750) further contains a pair of drive motors (760a, 760b) anchored to the housing (46) and respectively interconnected to eccentric ring actuators (156, 158) for deflecting and rotating the shaft (24).