Development of Downhole Pump for Binary Cycle Power Generation

Abstract

NEDO launched a project on the development of binary cycle power generation in 1980. The development of a down-hole pump is one of the major goals of the project as well as the evaluation of the geothermal reservoir for the medium to high temperature water (from 150 to 200?C). The submersible motor-driven down-hole pump could be used in severe geothermal environments.

The development of the pump has progressed step by step using test pumps No. 1 to No. 3. A long-term circulation test was performed to confirm the stability of the demonstration pump and to evaluate the reservoir from 1999 to 2001. This paper briefly describes the down-hole pump performance and results of the operation test.