Abstract: Operation of the rod pump systems of the Third Recovery Plant in Changqing Oilfiled were analyzed. After the analyzing interval pumping mechanism, combining the law of flow through porous medical of low permeable reservoir, the law of interval pumping was studied, under the condition of no decrease of the production rate. The interval pumping cycle was determined through the practical and theoretical study, so that the problems of the low production rate and low efficiency wells were solved and better benefit was obtained.

Key words: rod pump system, oil well interval pumping, save energy and decrease consume