Schlumberger Technology Corporation

Kiyomitsu Hikida

Yoshino Matsumoto

Hiroshi Hori

Jean-Christophe Auchere

Kojiro Nishimiya

An acoustic transducer is provided. The acoustic transducer includes a housing, a backing, a piezocomposite element adjacent the backing within the housing, and a diaphragm covering on an outward facing surface of the piezocomposite element.

Acoustic transducer

A downhole tool for real-time caliper measurements is provided. The downhole tool comprises multiple acoustic transducers mounted at different positions of the tool, and a control system. The control system drives the multiple transducers, receives pressure echo signals from the transducers, records the pressure echo signals in the memory, extracts data of two-way transit time and echo amplitude from the echo signals, and computes at least one of a borehole diameter, a tool center position, and an acoustic slowness or velocity of downhole fluid, based on the data of transit time and echo amplitude.

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Kanagawa-ken, Japan

Kiyomitsu Hikida