Through-casing formation test pressure measuring and sampling device and method

The invention relates to a through casing formation test pressure measuring and sampling device and method.The through casing formation test pressure measuring and sampling device comprises a base body, a plurality of drilling mechanisms and sampling mechanisms are arranged in the base body, packers are arranged at the upper end and the lower end of the base body, the drilling mechanisms penetrate through the base body to drill holes in the well wall of an oil well, and the sampling mechanisms are arranged on the base body. The packer expands to seal an oil well to form an annulus, fluid in a stratum enters the annulus through the drill hole, and the sampling mechanism extracts the fluid and stores the fluid. The device can drill through the well wall to enter the stratum in the one-time well descending process in the oil well passing through the casing, pressure measurement and stratum fluid sampling are conducted for multiple times, and the device has important significance and good application prospects fo