Page 52: of Offshore Engineer Magazine (Sep/Oct 2014)

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Drilling

PowerDrive was used for CDE runs.

Image courtesy of Schlumberger.

OE: How do the ROP of PDC bits with cleaned and cooled. A detailed hydraulic conical diamond Stinger element com- analysis was undertaken using advanced thereby unconstrained, making it easier pare to that of other PDC and impreg- computational ? uid dynamic (CFD) to destroy. The unique combination of nated bits when drilling in Carbonate software to accurately simulate the ? ow the Stinger geometry and its cutting formations?

around the Stinger element (cross ? ow).

The ROP is a lot higher compared to an In the course of each new bit develop- action reduce frictional heat resulting impregnated bit. Comparing to a con- ment, nozzle positions are adjusted and from improved wear resistance. The ventional PDC bit, the ROP will be also ? ne-tuned to maximize cleaning of the enhanced stability provided from the higher because the PDC with the Stinger Stinger element and the bottom hole center-placed element will deliver a element will deliver a more aggressive around the bit’s center. better load distribution throughout the cutting mechanism at bit’s center. Also cutting structure, which will decrease

OE: Could you tell us about your experi- the ability to keep the cutting structure and share the wear evenly among all ences with the bits in di