Patent ID: 8950517
Filing Date: 2015-02-10
Classification: E21B

Abstract:
1. A drill bit comprising; a shank adapted for connection to a downhole tool string; a bit body coupled to said shank, said bit body having a bit body central axis and a working face with at least one blade having a nose portion; a bore formed in said working face, said bore having a bore central axis and a bore radius, wherein said bore central axis and said bit body central axis are co-axial; a jack element disposed in said bore and configured to engage a formation, said jack element having a jack element central axis coaxial with said bit body central axis and a single distal end; and a retaining element disposed proximate said bore, said retaining element being positioned such that a distance from said bore central axis to said retaining element is less than said bore radius, wherein the retaining element is a tubular sleeve having a protrusion integrally formed thereon, the protrusion extending directly into the bit body, and the retaining element secured around an outer surface of the jack element and retains the jack element.