The expandable anchor whipstock is designed to be set in open holes. The anchor is expanded and the system is set into position to drill the window and rat hole in a single trip. This whipstock can also be cemented into place. This type of whipstock is generally used to sidetrack in open holes when a hard formation prevents typical sidetracking systems from working effectively or in case of any restriction that can not be sidetracked with a downhole motor. This openhole whipstock can be positioned with using orientation subs and survey equipment.
Expandable Anchor Whipstockhadi2017-05-13T16:13:52+00:00