Application of Smooth Drill Collars with High WOB Deviation Control Technology in Xujiaweizi Area

Because the hard strata and big angle of bedding, deep wells in Daqing Xujiaweizi area well deviate easily. Low efficiency and long drilling cycle are big problems of drilling engineering since small bit weight is used to avoid well deviation. To improve efficiency, Smooth drill collars with high bit weight WOB technology is used in the deep wells in Daqing Xujiaweizi area. Facts prove that 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 mechanism of smooth drill collars BHA ,then build kinematic model and dynamic mode,so bit side force's Solution formula is worked out,Get the principles and applicability of smooth drill collars with high bit weight WOB technology.