Application of Shallow Long Extended Reach Di-rectional Drilling Technolog y with Three Targets in Well Bi 268

Well Bi 268,the first shallo w long extended reach directional exploratory well with three targets,has a wel l depth267m,vertical depth1561m,bottom hole displace-ment 1485m,m aximum borehole deviation68.69°and kick-off point 466m.The targets ar e shallow,hole deviation is large,and angle holding interval is long,thus the re-quirements to well trajectory control and well co mpletion operation are very high.Strict measures were taken in re-spects of ge ologic engineering design,trajectory control,drilling assemblage and safe dril ling.The well was success-fully completed and frilling cycle was reduced12. 45d.