Geological resource prospection well casing ball type rigid centralizing device

The utility model relates to underground casing centralizing equipment after barefoot well completion, in particular to a geological resource prospection well casing ball type rigid centralizing device. Four supporting rib bosses (2) are arranged outside a casing ball type rigid centralizing device body (1), ball sleeves (5) are machined in the pipe wall of the supporting rib bosses (2) and the body (1) of which the diameters are larger than that of the outer edge of a casing coupling, and balls (3) are arranged inside the ball sleeves (5) and make contact with a casing (7) and a barefoot well wall (8) in the four inner and outer directions of the body (1) to support the casing to be centralized; vertically through cement paste lubricating hole channels (4) are formed in the supporting rib bosses (2) and the ball sleeves (5) to guarantee that the balls (3) are lubricated in a rolling mode under the action of cement paste. In the casing feeding process of well completion, the casing ball type rigid centralizing device body (1) is arranged on the casing fed into a well in a serial-connection mode in a sleeving mode, centralizing well cementation of the casing fed into the well in the barefoot well wall (8) is realized, and the eccentricity problem of the casing is effectively resolved.