of the rotatable orienting rod application_number US 26149602 A description referring to fig7 a drill pipe assembly 9 formed in several sections and suitably secured together includes drill rods outer barrels and an inner core taking means as shown the drill rods are rotated by a suitably powered rotary spindle 10 the remainder of the operating rig is completed with a suitable support structure such as a derrick d and a source of drilling fluid directed by a drilling fluid swivel 76 together with an engine a water pump and a drum hoist not illustrated with specific reference to fig1 6 an inner core taking means is shown including a plurality of sections 11 a fig1 3 which are keyed together to form an orienting rod 11 at the working end of the orienting rod 11 a core receiving barrel 12 is rotationally and axially secured fig1 and 4 the core receiving barrel 12 carries scribing means 13 a 13 b 13 c fig4 and 13 d fig6 on an inner surface thereof the scribing means 13 a d may be projections which are configured to scribe marks in a core section or the scribing means 13 a d may be another suitable configuration as the core is cut and moves into a center area 15 of the core receiving barrel 12 marks or grooves are scribed into the outer surface of the core which are intended to.