From cutting means placed in middle rotatory

The utility model relates to a from cutting means placed in middle rotatory, a serial communication port, including all being hollow structure's top connection, first casing and second casing, top connection, second casing reach first casing forms the combination cavity, the right -hand member of second casing is equipped with the end cap the outer wall symmetry of second casing is equipped with three handle of a knife groove, is equipped with in the handle of a knife groove and receive and releases the handle of a knife, still include the dabber, the dabber cartridge is in in the combination cavity, the spindle is fixed with the ring that resets, it forms first cavity to reset between ring and the second casing, the spindle is equipped with first water conservancy diversion hole and second water conservancy diversion hole, first water conservancy diversion hole with first cavity is linked together, the dabber with still be equipped with the second cavity between the end cap. The beneficial effects of the utility model are that, can keep cutting tool placed in the middle, reduce the surely inclined to one side risk of oil pipe, play the guard action to outer oil, sleeve pipe.