.Because the hard strata and big formation dip angle, deep wells in Daqing Xujiaweizi area deviate easily. Low efficiency and long drilling cycle are big problems of drilling engineering since small pressure is used to prevent well deviation. To improve efficiency, smooth drill collars with high WOB technology is used for the deep wells in Daqing Xujiaweizi area. Practice has proved that using this technology, penetration rate can be increased more than 20% , bit life can be extended more than 30% and well deviation can be corrected in Daqing Xujiaweizi deep drilling. This paper through analyzes the smooth drill collars BHA,its kinematic model and dynamic model is builded, bit side force 's Solution formula is worked out, principles and applicability of smooth drill collars with high WOB technology is deduced.
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李士斌,马爽,韩汝峰. 光钻铤大钻压防斜技术在徐家围子深井的应用[J]. 科学技术与工程, 2012, 12(4): . lishibin, mashuang, hanrufeng. Application of smooth drill collars with highWOB deviation control technology in Xujiaweizi area[J]. Science Technology and Engineering,2012,12(4).