Patent ID: 8789589

Claim:
An orienter tool for a bottom hole assembly (BHA), the orienter tool comprising: a housing defining an interior; a dual-spline drive mounted within the interior and including: a first lead screw portion with first threads having a first pitch; a second lead screw portion with second threads having a second pitch, the second pitch being different from the first pitch; a lead screw drive nut acting against the first lead screw portion within the interior of the housing to move a drive bushing axially along the second lead screw portion to force rotation of the second lead screw portion; and an output shaft connected to the second lead screw portion; a motor connected to the dual spline drive to rotate the lead screw drive nut; and a straight spline positioned about the drive bushing and mounted to constrain rotation thereof, wherein when the lead screw drive nut is rotated, the drive bushing is moved axially to impose a rotation upon the second lead screw portion and the output shaft.