METHOD AND APPARATUS FOR CONTROLLING EROSION IN A DOWNHOLE TOOL

摘要

A drill string is comprised of a tubular element and an elastomeric element. The tubular element has an interior surface and a longitudinal axis. The elastomeric element is positioned on the interior surface of the tubular element, and includes one or more ribs extending from the interior surface of the tubular element and arranged in a configuration that diverges from the longitudinal axis of the tubular element. The ribs form an opening within the tubular element having a diameter of a preselected size substantially similar to a diameter of a tool to be positioned therein.