Ball centralizer

The utility model discloses a ball centralizer which comprises a centralizer body. The centralizer body comprises an upper body and a lower body which are connected with each other; a ball groove upper half groove is formed in the lower end of the upper body, a ball groove lower half groove is formed in the upper end of the lower body, the ball groove upper half groove and the ball groove lower half groove jointly form a ball groove with the large inside and the small outside, and balls are installed in the ball groove. The depth of the ball groove is smaller than the diameter of the ball and larger than the radius of the ball. Contact of an oil pipe and a sleeve is changed into point contact from surface contact, a pipe column is rotated during construction, friction resistance is reduced, and thread making and sleeve grinding and milling effects are improved. And meanwhile, the maintenance cost is low, the beads are convenient to replace, and the service life is long. 本实用新型公开了一种滚珠扶正器，包括扶正器本体；所述扶正器本体包括相连接的上体