Formation pressure measurement while drilling utilizing a non-rotating sleeve

摘要

A downhole tool and method are provided for collecting data from a subsurface formation during drilling operations. The tool includes a tubular mandrel adapted for axial connection in a drill string positioned in a wellbore penetrating the subsurface formation and a stabilizer element or sleeve positioned about the tubular mandrel for relative rotation between the stabilizer element and the tubular mandrel. A plurality of elongated ribs are connected to the stabilizer element. A means is connected to the stabilizer element for frictional engagement with a wall of the wellbore so as to prevent the stabilizer element from rotating relative to the wellbore wall. An actuator system is carried at least partially by the stabilizer element, and a probe is 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. The method includes placing a non-rotating element of a tool positioned in a drill string in engagement with a wall of the wellbore such that the non-rotating element does not move relative to the wellbore wall. A probe carried by the non-rotating element is moved into sealed engagement with the wellbore wall to establish fluid communication between the formation and the non-rotating element, thereby enabling one or more properties of the formation fluid to be sensed.