Patent ID: 6158533
Filing Date: 2000-12-12
Classification: E21B

Abstract:
A downhole drilling assembly comprising the following:(a) a housing having an upper end for connection to a drill string and a lower end;(b) a fluid passage extending through the housing from the upper end to the lower end;(c) a power unit contained within the housing;(d) a drive assembly extending within the housing between the power unit and the lower end of the housing such that a mandrel chamber is defined between the drive assembly and the housing;(e) a radially movable stabilizer associated with the housing and located between the power unit and the lower end of the housing;(f) an axially movable mandrel contained within the mandrel chamber; and(g) a stabilizer actuator contained within the mandrel chamber and associated with both the mandrel and the stabilizer such that axial movement of the mandrel causes radial movement of the stabilizer.