Late last spring OIT and Oregon State University obtained a joint contract from ERDA to study downhole heat exchangers (DHE) (ERDA contract EY-76-5-06-24291. Evaluation and Design of Downhole Heat Exchangers for Direct Application . Co-principle Investigators are Dr. Gordon Riestad at OSU and Gene Culver at OIT. Basically, the objectives of the project are to design more efficient DHEs and to provide information that will enable potential users to design an efficient DHE for their particular application and to determine if the design is economical