Oil field is bored and is ground operation anti -back rotation device

The utility model discloses an oil field is bored and is ground operation anti -back rotation device belongs to brill mill device field on the well workover field of oil field. The utility model discloses an anti -back rotation opening picture peg through bolt and operation well head cross fixed connection and with the anti -back rotation oil pipe of the same axial lead position of opening picture peg, anti -back rotation oil pipe is last to include two gag lever posts, opening picture peg cover is located on the anti -back rotation oil pipe. The utility model discloses in boring the mill work progress, can prevent effectively that the interior tubular column of well from taking place to turn round to beat to turn round, can guarantee again to exert the weight on bit for a long time, solved the problem of boring the mill inefficiency to unfixed soft materials in the pit shaft. The utility model has the advantages of reasonable design, have that manufacturing process is simple, factor of safety is high, long s