Oil tube suitable for large-inclination well foam drainage gas recovery

The invention discloses an oil tube suitable for large-inclination well foam drainage gas recovery. The oil tube comprises an outer barrel and an inner barrel rotationally arranged in the outer barrel. The inner barrel and the outer barrel are arranged coaxially. Matched threaded fit structures are arranged at the upper end and the lower end of the outer barrel. An arc protruding portion distributed in the length direction of the inner barrel is arranged on one side of the inner wall of the inner barrel, the arc protruding portion protrudes inwards in the radial direction of the inner barrel,and the protruding highest point of the arc protruding portion is close to the upper end of the arc protruding portion. The structure of the oil tube is optimized, the static mixing theory opposite tothe traditional dynamic mixing and stirring theory is mainly adopted, the layering character of gas and liquid on large-inclination well segments is fully utilized, fluid in all directions is guidedand converged through the s