Open hole packer tri-ellipsoid test device

The invention belongs to the technical field of down-hole packer indoor detection, and particularly relates to an open hole packer tri-ellipsoid test device. The open hole packer tri-ellipsoid test device comprises a tri-ellipsoid test casing pipe, a casing pipe upper connector, a central pipe booster connector, an upper cavity booster port, a lower cavity booster port, a test packer, a test medium, a test well casing pipe, a wellhead upper connector and a test well casing pipe lower plug. The cross section of the inner wall of the tri-ellipsoid test casing pipe is an irregular ellipse, the problems that the property evaluation method of an open hole packer in the prior art is not uniform in standard, the open hole packer in the prior art cannot actually simulate the environment under the shaft, so that the sectional fracturing effect is affected are solved. Relative to a common circular casing pipe, the test device is much closer to the real environment under the shaft, the packer which is tested to be quali