| Title | Battery Pack/Controller for High Temperature Applications |
|---|---|
| Authors | Wolfenbarger, Fred M. |
| Year | 1986 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Drilling; Operations; Production; USA; California; Salton Sea; Power Transmission; Heat Shield; Dewar Flask; Logging |
| Abstract | At temperatures in excess of 300°C, standard conductive wire lines cannot be used for signal or power transmission in geothermal wells. At such temperatures, a mechanical slickline can be used to raise and lower instrumentation, but the instrumentation control and power must then be self contained. This paper reviews the development of a battery and timing circuit to control a motor in a Los Alamos National Laboratory sampling tool. The batter pack controller circuitry enclosed in a dewar was used in the Salton Sea Scientific Drilling Project (SSSDP) for temperature approaching 400°C. |