Layering oil production technology of rod jet pump

To solve the problems of rod pump such as stroke loss and lower pump efficiency caused by fluid production force deficiency in the formation of the low permeability but high oil saturation,the layering oil production technology rod jet pump is developed.It is required that a jet pump be added at the end of a rod pump and high permeability formations and low permeability formations be separated through packer.As the power fluid of the jet pump,the liquid produced from high permeability formations can be utilized to improve the liquid producing capacity of low permeability formations through forming pressure drop there.This paper introduces the operating principle of the combinatorial layering oil production of the rod jet pump,and the parameter optimization as well as field application.The technology was applied to 13 wells in He’nan Oilfield in 2006,with the success rate and the effective rate reaching 100%.The cumulatively incremental crude oil was up to 2197 tons.