Experimental investigation on properties of dipole transmitters for acoustic well logging

Multipole acoustic well logging is a new technology,to which the key is dipole transmitter.Measurement results involving the consistency,temperature rate and directivity of the self-developed dipole acoustic dipole transducers are shown in this paper.The experimental results for three ceramic dipole transducers show that the resonant frequency is lower about 20% in the silicon oil than that in the air.The resonant frequency decreases a little with temperature increasing from room temperature to 150℃.The ratio of acoustic pressure on the strongest radiating direction to that on the weakest radiation direction exceeds 12dB according to the directivity pattern.It is found that good dipole waveforms are acquired in the preliminary measurements using the self-developed acoustic dipole transmitters.