First application of cementing plug side tracking technology in horizontal wellbore on semi-submersible platform

Sidetracking is a method that drilling a new wellbore after cementing plug in original wellbore, this method is good credibility and have a high rate success. C2H is a horizontal development well, the ?215.9 mm wellbore have not drilled the good oil formation, therefore it was decided to sidetracking the well of C2H1 after cementing plug. Using short gage and strong attack performance PDC bit coordinate Power Drive rotating guide tool, optimized BHA and used near-bit inclinometering results to control wellbore trajectory. Using the measures of chute and manufacturing steps and control time drilling to sidetracking, controlled the drilling parameters to solve the difficulties of deep sidetracking location and high strength formation and heave of the semi-submersible platform and completed the sidetracking wellbore successfully. The ?215.9 mm wellbore of C2H1 have a good oil formation, the trajectory was smooth and the completion screen pipe was downed successfully into the wellbore. The operation of sidetrack drilling was smoothly in C2H1, which had a good reference for similar wells.