With the innovation of extended-reach and directional drilling, running casing and liner strings has become increasingly difficult. Not much has been done to address the challenges, which include ledges and obstructions, washouts, swelling shale, bridging, high doglegs, difficult well profiles, fill on bottom, and well collapse. To overcome the challenges, a new product line was developed as a way to facilitate casing operations, especially for long horizontal strings, production strings, and intermediate casing strings.
Introduction
The technology can rotate independently from the casing when encountering obstructions and hanging. The rotation is performed by reciprocating the casing through 3- to 5-ft strokes that cause the tool shoe to act as a bit and ream.
