Study Of Extended Reach Well Trajectory Design Optimization

Extended reach well of Drilling technology has a good applied prospect in such a time that drilling technology highly developed. This paper gives the calculating formula for angle of hold angle section of wellbore curve through studying the optimized design of extended reach well's wellbore trajectory. And based on the principle of determining the build point, it deducts the calculating formula for different shapes of built section, including circular profile and twin increase profile of constant curvature method in build up section, cycloid, catenary, amended catenary, quasi- catenary, lateral catenary and parabola of various curvature method. Using weighted coefficient estimation method, the optimist curve was found accord to the facts of length of borehole, length of build section, build rate and all kinds of friction and torque.