Displacement amplified acoustic transmitter
AssigneeHalliburton Logging Services, Inc.
InventorsDennis E. Roessler, A. J. Mallett
Life of this patent
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Abstract
This disclosure is directed to a displacement amplifier for forming acoustic pulses and more particularly to one which incorporates a flexible movable lightweight diaphragm of rectangular configuration. It has upper and lower ends which are connected to opposing piston rods driven by duplicate pistons and double acting cylinders. The cylinders are located at opposite ends of the diaphragm or membrane. They are supported in an elongate tool which positions the flexible membrane in a generally rectangular window. This enables the membrane to flex as the pistons are driven, thereby enabling the flexure of the membrane to form dipole source for radially directed compression waves transmitted from the membrane in the window.
Claims10
An acoustic wave transmitter for use in a well borehole comprising:
- (a) an elongate flexible membrane having spaced ends wherein said membrane is formed of a pliable, relatively thin, lightweight material;
- (b) opposing first and second hydraulically powered motors having membrane connected reciprocating rods at the ends of said membrane so that said rods may reciprocate synchronously to inpart flexure to the membrane wherein flexure results in bowing at the mid portions thereof;
- and
- (c) a window support structure for said membrane to position said membrane so that said window support structure, when positioned in a well borehole, locates the membrane to form a wave in drilling fluid in the well borehole radiating outwardly therefrom on vibration of said membrane by said motors.
Dependencies are inferred from the claim text.