Paper: Fluid Levels - Application, Interpretation, and Evaluation

During the last ten years, the acoustical well sounder has really come into its own as a production tool. These instruments are used to determine the fluid level in wells by the echo method. In addition, the location of various subsurface equipment items can be determined. At the present time, there are two major manufacturers of acoustical well sounders. Both of these manufacturers use two small trunks to house their instruments. One trunk contains the wellhead attachment with the necessary interconnecting cables. The second trunk contains the amplifier-recorder.