1. Hydraulic Institute Pump Standards, ANSI/HI 1.1-1.5,

1994.

2. Dresser Company Publication Catalog, Security Down-

hole Motor Services Operations Handbook, Houston, TX, No-

vember 1992.

3. H. Cholet, "Progressing Cavity Pumps," Editions Technip,

Paris, 1997.

4. L. Nelik, "Centrifugal and Rotary Pumps: Fundamentals,

Comparisons and Applications." Short Course, ASME Profes-

sional Development Program, Pittsburgh, PA, June 1998.

5. L. Nelik, "Positive Displacement Pumps," Short Course,

15th International Pump Users Symposium, Texas A&M Uni-

versity, Houston, TX, March 2000.

6. L. Nelik, "Pumps," in Ktrk-Othmer Encyclopedia of Chem-

ical Technology, 4th Ed., Volume 20. New York: John Wiley &

Sons, Inc., 1996.

REFERENCES

7. R. Samuel and K, Saveth, Progressing Cavity Pump (PCP):

New Performance Equations for Optimal Design, Richardson, TX:

Society of Petroleum Engineers, 1996.

8. M. Delpassand, "Progressing Cavity Pump Design Op-

timization for Abrasive Applications," Artificial LiJi9 July 1997.

9. G. Vetter and W. Wirth, "Understanding Progressing

Cavity Pumps Characteristics and Avoid Abrasive Wear," paper

presented at the Texas A&M University 12th International

Pump Users Symposium, March 1995.

10. D. Baldenko, E Baldenko, and A. Shmidt, "Screw

Downhole Motors: New Designs and Control Methods,"

Downhok Drilling (in Russian), 1997.