Toolface offset measurement tool

Abstract

A bottom-hole assembly includes a measurement while drilling (MWD) tool with a first reference line, a downhole directional tool operatively coupled to the MWD tool and arranged downhole therefrom, the downhole directional tool including a second reference line, a projection device securable to the MWD tool and including a mount that includes opposing upper and lower clamps, and a spacer extending between the upper and lower clamps, an instrument line provided on the mount and alignable with the first reference line and a projection instrument operatively coupled to the mount and operable to generate and convey a beam of light and a projection detection sensor securable to the downhole directional tool and aligned with the second reference line, the projection detection sensor being arranged to receive the beam of light.