Paper: Progress Report 3 on Fluid Slippage in Down-Hole Rod-Drawn Oil Well Pumps

This paper will present results of two field slippage tests and compare these results with laboratory testing of pump slippage presented in the 1998 Southwestern Petroleum Short Course paper and field application of larger clearance pumps. This is Progress Report #3, with the ultimate goal being to present an empirical equation which will estimate the down-hole fluid slippage over a wide range of pump clearances. Utilizing the field test data an empirical equation is presented. The current results should be useful to operators for selection of clearances between metal plungers and barrels.