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大庆钻井科研所的科技人员,结合在新油田地层倾角较大的条件下打优质井的生产实践,试验成偏心钻铤。偏心钻铤,就是在普通钻铤的一侧,钻一排孔,造成一侧轻一侧重。当钻铤旋转时就产生离心力。井斜时,由于重力的作用,使钻头靠着井壁的底边,有自然的减斜趋势,由于偏心钻铤产生的离心力的作用,钻铤旋转时,重力和离心力对井壁合成一个
Daqing Drilling Research Institute of science and technology personnel, combined with the new oil field formation under the conditions of greater inclination to hit the production of high quality wells, tested into eccentric drill collar. Eccentric drill collar, is in the ordinary drill collar on one side, drilling a row of holes, causing one side of light weight. Centrifugal force occurs when the collar is rotated. Due to gravity, the drill bit is inclined against the bottom of the shaft wall with a natural tendency of decreasing inclination. Due to the centrifugal force generated by the eccentric drill collar, when the drill collar rotates, gravity and centrifugal force synthesize a