Patent ID: 6230557
Filing Date: 2001-05-15
Classification: E21B

Abstract:
A downhole tool for collecting data from a subsurface formation, comprising:a tubular mandrel adapted for axial connection in a drill string positioned in a wellbore penetrating the subsurface formation;a stabilizer element positioned about the tubular mandrel for relative rotation between the stabilizer element and the tubular mandrel;a plurality of elongated ribs connected to the stabilizer element;means connected to the stabilizer element for frictional engagement with a wall of the wellbore, such frictional engagement preventing the stabilizer element from rotating relative to the wellbore wall;an actuator system carried at least partially by the stabilizer element; anda probe carried by one of the elongated ribs and adapted for movement by the actuator system between a retracted position within the one rib and an extended position engaging the wellbore wall such that the probe collects data from the formation.