초록 ▼

A flexcompressional acoustic transducer is set forth. In the preferred and illustrated embodiment, multiple parallel magnetostrictive rods provided with coils are coupled through a plate affixed to a radiating element. The radiating element in one embodiment is an elongate hollow cylinder which is c

A flexcompressional acoustic transducer is set forth. In the preferred and illustrated embodiment, multiple parallel magnetostrictive rods provided with coils are coupled through a plate affixed to a radiating element. The radiating element in one embodiment is an elongate hollow cylinder which is closed at both ends. Vibrations from the magnetostrictive members cause the cylinder to radially flex, creating an omnidirectional acoustic wave transmitted radially outwardly, the apparatus being positioned in a sonde for connecting an acoustic wave front through the wall of the sonde for transmission into the surrounding wellbore fluids and the adjacent formations.

대표청구항 ▼

An apparatus for forming a sonic wave radiated from a sonde in a well borehole, the wave forming apparatus comprising: (a) an acoustic energy radiating elongate cylindrical member having two ends and a requisite stiffness and mass said member being positioned in a sonde; (b) vibration forming means

An apparatus for forming a sonic wave radiated from a sonde in a well borehole, the wave forming apparatus comprising: (a) an acoustic energy radiating elongate cylindrical member having two ends and a requisite stiffness and mass said member being positioned in a sonde; (b) vibration forming means provided with electrical power for vibrating wherein vibrations are coupled to said energy radiating member; (c) means connected to one end of said cylinder for coupling said vibration forming means to said radiating member to impart radiation thereto; (d) mounting means for holding said radiating member and said vibration forming means in a fixed structural relationship wherein said mounting means further includes a specified mass; and (e) said vibration forming means coupling vibrations to said radiating member dependent on the relative mass and stiffness thereof to initiate formation of a sonic wave radially expanding outwardly to transmit a wave therefrom in all directions coupled through fluid in a well borehole.