Anti-drag centralizer

The utility model relates to an anti-drag centralizer which is used for reducing frictional drag and reducing torsion in processes of pulling out of hole, running in hole and drilling of oil and natural gas drilling operation. The anti-drag centralizer is composed of a body, an anti-drag sleeve, a bearing and nuts, the body is an inverted T-shaped tubular column, and the anti-drag sleeve is sleeved on the body and fixed by the nuts. The anti-drag sleeve can rotate around the body, the bearing between an outer wall of the body and the inner wall of the anti-drag sleeve can reduce friction and avoid abrasion, and therefore the anti-drag centralizer can reduce torsion of a whole drilling column system, lowers frictional drag between the tubular column and a sleeve, guarantees smooth running of the tubular column, has the effect of centralizing, and improves drilling efficiency.