DOWNHOLE TOOL WITH SENSORS MOUNTED ON EXTENDABLE HINGED PADS

摘要

A system and method for downhole measurement for use with drill strings to reduce the borehole gap with respect to sensors carried by the drill string. In one embodiment, the sensors (31) are mounted on a surface of the directional drilling hinged pad (40) that comes in contact with the borehole wall. The hinged pad is pressed against the borehole wall as contact is made with the wall, thereby keeping the sensors at a minimum gap with respect to the wall. In another embodiment, the hinged pad is not used for directional drilling. Therefore the hinged pad is extended outward to the wall with the minimum necessary amount of force.