Spiral shaft lining appeared in some wells since the drilling speed improving in Hailer oilfield, log interpretation was affected in 151 wells, 15.60% of the all. This was especially obvious in Wudong block; there were 36 obvious spiral wells, 28.8% of all wells there. The paper discussed the causes of spiral well formation from the view of geology and engineering, and put forward the solution and technical measures. The tests in the second half year of 2012 showed good effects.