Acoustic transmitter comprising a plurality of piezoelectric plates

A method for emitting a pressure pulses into a borehole, the method comprising:

• (a) disposing within said borehole a logging tool comprising a plurality of piezoelectric plates;
• (b) disposing each said plate in a wall of said logging tool such that the radius of said logging tool is essentially normal to a major surface of each said plate;
• and
• (c) polarizing and configuring physically and electrically said plates to emit said pressure pulse in a common direction normal to said major surfaces upon application of a voltage to said plurality of plates.

A logging tool acoustic transmitter comprising at least one piezoelectric plate;

• wherein
• (a) said at least one plate is disposed within a wall of said logging tool such that the radius of said logging tool is essentially normal to a major surface of said at least one plate;
• and
• (b) said at least one plate is polarized and configured physically and electrically to emit a pressure pulse from each said plate in a common direction normal to said major surface upon application of a voltage to said at least one plate.

A method for emitting a pressure pulses into a borehole, the method comprising:

• (a) disposing within said borehole a logging tool comprising at least one piezoelectric plate;
• (b) disposing said at least one plate in a wall of said logging tool such that the radius of said logging tool is essentially normal to a major surface of said at least one plate;
• and
• (c) polarizing and configuring physically and electrically said at least one plate to emit said pressure pulse in a common direction normal to said major surfaces upon application of a voltage to said at least one plate.