Downhole tool, method, and system

Abstract

A downhole tool, including first and second sections, the second section being rotatable relative to the first section, a lock sleeve attached to the first and second sections, the lock sleeve being unlockable by application of a threshold torque acting between the first section and the second section. A positive displacement motor assembly, including a housing, a power section, and a stator, a drive sub connected to the rotor, and a lock sleeve nonrotatably attached to the housing and to the drive sub, the lock sleeve being releasable at a selected threshold torque between the housing and the drive sub. A method for forming a casing exit, including running a tool to a target location in a borehole, causing the first section and the second section to experience different rotational strain, releasing the lock sleeve at a torque threshold between the first and second sections.

Dependencies are inferred from the claim text.