Method and apparatus for acoustically measuring the...

Details Method and apparatus for acoustically measuring the... Method and apparatus for acoustically measuring the...

E - Fixed Constructions

21

B

166/2

E21B 47/08 (2006.01) G01B 17/00 (2006.01)

Patent

CA 1190848

ABSTRACT For the measurement of the transverse dimensions of a hole (50) in a well, one moves a sonde (52) on which is mounted an electro-acoustic transducer (42) in an offcentered position in relation to the axis (65) of the sonde. This transducer has two opposite active faces (60,61) so as to simultaneously transmit acoustic pulses in diametrically opposite directions from the sonde (52). When the sonde is centered in the hole, the transducer picks up the echos retransmitted by the wall (50) of the hole in the two directions at different times. A recording is made of these times and preferably also of an indication of the amplitude of each of these echos to obtain both a diameter measurement and an indication of the condition of the hole surface (50). Several transducers (42) are provided, superposed and oriented along diameters distributed around the axis of the sonde. (Figure 3).

418197

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