In order to drill a new deviated wellbore away from the original wellbore, a sidetracking operation may be performed as a preplanned or contingency operation. Preplanned operations are carried out for drilling a reentry well and contingency operations are performed for bypassing an obstacle such as a fish, junk, unstable formation or casing collapse.
Whipstock
Whipstock is an effective, cost-efficient tool for sidetracking from an existing wellbore. Sidetracking can be accomplished in open hole or thru a single or more casing layer. The Whipstock deflects the mill to create an rat hole in desired direction…
Section Mill
Section Mill is a hydraulically activated tool which has multiple cutting knives, designed to mill for cutting a single string of casing, sections of casing above and below storage formations, in perforated zones, to permit a sidetracking operation. Some Section Mills are used as well to mill internal casing patches, screens, liners and liner packers…
