Stinger CONICAL DIAMOND ELEMENT Beyond shear-based cutting performance- Unique, central conical element increases ROP. Cutters on conventional PDC bits shear rock at the center of a borehole inefficiently at low velocities, thereby limiting ROP and introducing unwanted drilling vibration. The Stinger conical diamond element is a unique cutting enhancement at the center of the bit that significantly increases drilling efficiency. Using a PDC bit with a Stinger element to drill in the hard and abrasive formations of the Bakken basin, one customer increased average ROP 46%. Find out more at slb.com/Stinger Stinger is a mark of Schlumberger. © 2014 Schlumberger. 14-BT-0017