An orienting hanger assembly, comprising: a generally tubular inner hanger disposed to be received snugly into a generally tubular outer collar such that when the inner hanger is fully received into the outer collar a longitudinal axis of the inner hanger coincides with a longitudinal axis of the outer collar, an annular internal shoulder provided on the outer collar abuts an annular external shoulder on the inner hanger, and first and second ends of the of the inner hanger generally correspond with first and second ends of the outer collar; a cylindrical MWD tool adapter having first and second adapter ends (151, 152), the first adapter end disposed to threadably engage the second end of the inner hanger, and the second adapter end disposed to threadably engage an MWD tool, the tool adapter further including a radial threaded tool-orienting hole; the outer collar having a tubular collar wall, the first end of the outer collar including at least one threaded locking hole extending through the collar wall; the inner hanger having a tubular hanger wall, the first end of the inner hanger including an annular external knurled portion formed on the hanger wall, the knurled portion and the at least one locking hole located so that, when the inner hanger is fully received into the outer collar, a locking screw can be received through each locking hole and frictionally engage the knurled portion; the first end of the inner hanger further providing an interior alignment notch in the hanger wall; the second end of the inner hanger providing at least two opposing radial wings extending outward therefrom, one of the radial wings having a predetermined radial offset about the inner hanger longitudinal axis from the alignment notch, each radial wing terminating at a distal wing face and having a common radial wing length such that when the inner hanger is received into the outer collar, the distal wing faces are located snugly next to an inner surface of the outer collar at the second end thereof, at least one of the radial wings including an open wing passage from its distal wing face through to an inner surface of the inner hanger at the second end thereof, threadable engagement of the tool adapter onto the second end of the inner hanger enabling an orienting screw to be received through a selected wing passage and into the tool-orienting hole so that a portion of the orienting screw prevents relative rotation of the tool adapter and the inner hanger via contact engagement with the selected wing passage; and box and pin connections (106, 107) on corresponding ones of the first and second ends of the outer collar, the box and pin connections (106, 107) suitable to threadably insert the outer collar into a drill string. a generally tubular inner hanger disposed to be received snugly into a generally tubular outer collar such that when the inner hanger is fully received into the outer collar a longitudinal axis of the inner hanger coincides with a longitudinal axis of the outer collar, an annular internal shoulder provided on the outer collar abuts an annular external shoulder on the inner hanger, and first and second ends of the of the inner hanger generally correspond with first and second ends of the outer collar; a cylindrical MWD tool adapter having first and second adapter ends (151, 152), the first adapter end disposed to threadably engage the second end of the inner hanger, and the second adapter end disposed to threadably engage an MWD tool, the tool adapter further including a radial threaded tool-orienting hole; the outer collar having a tubular collar wall, the first end of the outer collar including at least one threaded locking hole extending through the collar wall; the inner hanger having a tubular hanger wall, the first end of the inner hanger including an annular external knurled portion formed on the hanger wall, the knurled portion and the at least one locking hole located so that, when the inner hanger is fully received into the outer collar, a locking screw can be received through each locking hole and frictionally engage the knurled portion; the first end of the inner hanger further providing an interior alignment notch in the hanger wall; the second end of the inner hanger providing at least two opposing radial wings extending outward therefrom, one of the radial wings having a predetermined radial offset about the inner hanger longitudinal axis from the alignment notch, each radial wing terminating at a distal wing face and having a common radial wing length such that when the inner hanger is received into the outer collar, the distal wing faces are located snugly next to an inner surface of the outer collar at the second end thereof, at least one of the radial wings including an open wing passage from its distal wing face through to an inner surface of the inner hanger at the second end thereof, threadable engagement of the tool adapter onto the second end of the inner hanger enabling an orienting screw to be received through a selected wing passage and into the tool-orienting hole so that a portion of the orienting screw prevents relative rotation of the tool adapter and the inner hanger via contact engagement with the selected wing passage; and box and pin connections (106, 107) on corresponding ones of the first and second ends of the outer collar, the box and pin connections (106, 107) suitable to threadably insert the outer collar into a drill string.