METHOD AND APPARATUS TO ROTATE SUBSURFACE WELLBORE CASING

摘要

Embodiments of the present invention are generally related to a method and apparatus for subterranean wellbores and in particular, to a method and apparatus for rotating a subsurface tubular string, such as a casing section, without rotation at the surface. More specifically, a casing section of a wellbore may be rotated to provide a cement seal with increased strength and reliability. In one embodiment, a downhole tool and rotation assembly is disclosed which imparts a torsional force to a predetermined casing section when a fluid is flowed through the downhole tool and rotation assembly.

主权项

1. A downhole tool adapted for rotating a tubular string section within a wellbore, comprising:
a rotatable device body having an interior surface defining a cavity, an exterior surface, an upper end and a lower end, and wherein at least one of the upper end and the lower end are configured to engage the tubular string section; and wherein the interior surface has a geometric configuration to impart a torsional force to the tubular string section when a fluid is pumped through the cavity of the rotatable device body.