The Study Of Transfer Of Power Used In Roll Drilling In Deep Well

By analyse of stress and movement of roller bit. This thesis educed that roller bit had lots of movements. There are bit's revolution, roller's rotation, roller's slippage, bit's vibration along bit's axis because of movement of bit's teeth, and there are vibration of bit along vertical plane of bit's axis because of three rollers'movement.For drill pipe's movement under well, This thesis educed that drill pipe's movement have drill pipe's revolution, drill pipe's rotation, drill pipe's vibration along drill pipe's axis because of movement of bit's teeth, vibration of drill pipe along vertical plane of bit's axis, vibration because of drill pipe's torsion, by analyse of stress and movement of drill pipe. For drill pipe's vibration along drill pipe's axis, This thesis work out the length and mass of drill pipe which have vibration along drill pipe's axis, and establish function of drill pipe's vibration along drill pipe's axis. Basing on analyse of stress and movement of roller bit, the thesis educe that the causes of vibration of drill pipe along vertical plane of bit's axis are the bend of drill pipe, self-excitation vibration, vibration of bit along vertical plane of bit's axis. The thesis establish function of drill pipe's vibration along vertical plane of bit's axis.For the power that drill pipe consumed, This thesis educed the power that bit's friction consumed, the power that drill pipe's friction consumed, the power that drill pipe vibration along drill pipe's axis consumed, by analyse of stress and movement of drill pipe and roller bit. Lastly the thesis educed the formula of the power that vibration of bit along vertical plane of bit's axis consumed.