Downhole integrated closed drainage rubber sleeve for oil and gas well

The utility model belongs to the technical field of underground liquid drainage rubber sleeves, and particularly relates to an underground integrated airtight liquid drainage rubber sleeve for an oil and gas well, which comprises an inner sleeve body, a plurality of rubber pads are integrally formed and connected to the outer side of the inner sleeve body, a steel skeleton structure comprises a plurality of steel skeletons wrapping the outer side of the inner sleeve body, and the steel skeletons are annularly arranged at equal intervals. Every two adjacent steel frameworks are connected into a whole through a connecting base frame, containing cavities matched with the rubber pads are formed between the connecting base frames and the steel frameworks, the steel frameworks are sleeved with the outer cylinder body, the steel frameworks are matched with the connecting base frames through the steel frameworks, an inner core of the liquid drainage rubber cylinder is formed, and the strength of the whole rubber cyli