Completion pipe string for small size shaft

The invention relates to the technical field of oil production pipe strings of electric submersible pump oil production wells in the petroleum industry, in particular to a well completion pipe stringfor a small-size shaft. The well completion pipe string for the small-size shaft comprises a pipe string and an oil pipe, wherein the pipe string consists of an outer wall and an inner cavity, and theoil pipe is arranged in the inner cavity; and an electric pump hanger is arranged on the oil pipe and comprises an electric pump hanger inner cavity and an electric pump hanger outer wall; a two-wayvalve capable of controlling upward oil extraction or downward injection and an electric pump unit are sequentially arranged in the electric pump hanger inner cavity from top to bottom; an electric pump protection barrel is connected to the electric pump hanger outer wall; a sand setting barrel and a plurality of hydraulic control sliding sleeves are further sequentially connected to the bottom ofthe electric pump protectio