Pipe column using technologies of multilayer mining, testing pressure by layers and obtaining yield by layers

The utility model provides a pipe column using technologies of multilayer mining, testing pressure by layers and obtaining yield by layers, which is applied to layered tests of multilayer mining oil wells of oilfields. The pipe column mainly consists of an oil pipe, a sucker rod, an oil pump, an upper switch, a packer, a lower switch and a screw plug, wherein the oil pipe is connected with the oil pump; the upper end of the oil pump is connected with the sucker rod; the oil pipe arranged on the lower part of the oil pump is connected with the upper switch; the oil pipe arranged on the lower part of the upper switch is connected with the packer; the oil pipe arranged on the lower part of the packer is connected with the lower switch; the bottom part of the lower oil pipe of the lower switch is fixed with the screw plug; the packer is arranged between the upper oil layer and the lower oil layer; and the packer is fixed on the inner wall of the sleeve. The pipe column has the effects of realizing the continuous delamination test on the multilayer oil wells by one pipe column and reducing the workload in the layered testing field. The pipe column has simple structure and can be applied to straight wells as well as directional wells.