METHODS AND APPARATUS FOR ACOUSTIC TRAVEL TIME AND CEMENT BOND LOGGING

摘要

An illustrative embodiment of the present invention includes an acoustic well logging sonde having four articulated arm members disposed at quadrant intervals about a central tubular body member and having an acoustic transmitting transducer disposed on the lower portion of the body member. A total of six acoustic transducers are carried by the four quadrant spaced arms of the tool. A switching arrangement is provided for selecting groups of four of the six articulated transducers for making either cement bond log measurements or acoustic travel time measurements.