The design of reaming stabilizer and an analysis of its anti-deviation performance

In the drilling process of straight hole,the problem of hole deviation has not so far been solved satisfactorily.The traditional method was characterized by a low efficiency and the costs of the advanced automatic vertical drilling tool were too high.The mechanical properties of the bistable drilling assembly were analyzed.Through a design of the reaming stabilizer with cutting function,the bistable deviation control drilling assembly with the reaming stabilizer was produced by optimizing the position of stabilizers.An experimental testing indicated that the designed reaming stabilizer operated well in the process of reaming drilling.The theoretical analysis showed that,using the principle of reducing deviation through bending moment,this reaming and anti-deviation assembly consisting of small drill bit,reaming stabilizer and ordinary stabilizer could produce an angle dropping force several times larger than that produced by the ordinary pendulum assembly.Therefore,the purpose of deviation control and fast drilling at relatively high bit weight can be achieved.