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The hole reaming and side cutting characteristics of offset one-cone bit and conventional one- cone bit were investigated on simulated drilling experimental equipment.The borehole diameter was a little larger than the bit diameter due to side force.However,the reaming effect was not very apparent, whether drilling with an offset or conventional one-cone bit.The side cutting displacement increased gradually with increasing depth of drilling and side force.The side cutting displacement of offset one- cone bits was larger than that of conventional ones under the same conditions of weight-on-bit (WOB), rotary speed,side force and borehole depth.
The hole reaming and side cutting characteristics of offset one-cone bit and conventional one-cone bit were investigated on simulated drilling experimental equipment. Borehole diameter was a little larger than the bit diameter due to side force. However, the reaming effect was not either explicitly or whether one with one offset or one with one offset one gradually formed with increasing depth of drilling and side force. conditions of weight-on-bit (WOB), rotary speed, side force and borehole depth.