中文摘要：

进行水平井段旋转钻进时钻头侧向力的试验研究,并将钻头侧向力分解为方位力和井斜力,以这两个力的变化规律为基础,对待钻井的钻进趋势进行预测.结果表明：随着钻压和转速的增加,方位力和井斜力的变化规律不同,增加钻压,两个力波动的频率变小,波动的能量变大,但方位力的波动频率大于井斜力的波动频率,方位力的波动能量小于井斜力的波动能量;增加转速,方位力的波动频率变大,波动能量几乎不变,井斜力的波动频率变化不大,但波动能量变大;在实际的钻进过程中,为避免“方位漂移”现象的加剧,建议使用较低钻压或者高钻压钻进;为避免井斜加剧,建议使用低钻压和低转速钻进.

英文摘要：

An experimental study was conducted to measure the lateral forces on drilling bit in a horizontal well when using a rotary drilling technique.The lateral force of bit can be resolved into an azimuth force and a deviation force,and the drilling tendency can be predicted according to the variations of the two forces.The results show that with the WOB and rotary speed increasing,the variation tendency of the azimuth force and deviation force is different.With the WOB increasing,the variation in the frequency of the two forces is not significant,but the variation in terms of energy is significant.However,the frequency variation of the azimuth force is bigger than that of the deviation force,and the energy variation of the azimuth force is smaller than that of the deviation force.With the rotary speed increasing,the frequency variation of the azimuth force becomes larger,while its energy is almost not affected.Meanwhile,the frequency of the deviation force is not sensitive to the rotary speed,but its energy does.In an actual drilling process,either a lower WOB or a higher WOB is suggested to use in order to avoid the ＂bit-walk＂ phenomena.Lower WOB and lower rotary speed can be applied in order to reduce the tendency of well deviation.