Centralizer

The utility model relates to the technical field of petroleum exploration, in particular to a centralizer. Comprising a centralizer body, the centralizer body is provided with a centralizer mounting hole extending in the axial direction of the centralizer body, and the centralizer body can be connected with a casing string through the centralizer mounting hole. The rolling parts are arranged at intervals in the circumferential direction of the centralizer mounting hole and rotationally connected with the centralizer body in the axial direction of the centralizer body, when a casing string descends a well, the rolling parts are attached to the side wall of the well to centralize a casing, the casing string is located in the center of the well, meanwhile, the side wall of the well can drive the rolling parts to rotate, and the casing string is located in the center of the well. According to the centralizer, friction between the centralizer and the side wall of the shaft is effectively reduced, so that the centr