When a Canadian operator needed to optimize its PowerDrive Orbit G2™ RSS runs, SLB introduced its first one-piece steel body PDC bit—the AccuStrike™ short-makeup drill bit. Featuring a 37% shorter drillbit length, the AccuStrike bit brings the cutting structure closer to the deflection point of the RSS. Compared with offsets, the new bit design helped the operator improve build rate by up to 64% while reducing equipment-damaging shock and vibration.
Extreme lateral and axial shock and vibration was leading to excessive bottomhole assembly (BHA) wear and abbreviated run lengths, increasing the operator’s time downhole. To improve drilling efficiency, the company sought a bit that would enhance the performance of the PowerDrive Orbit G2 RSS by delivering longer, faster runs and tighter curves.
SLB launched a comprehensive fit-for-basin design strategy. Engineers analyzed offset well data, modeled bit-to-rock interactions using IDEAS™ integrated dynamic design and analysis platform, optimized makeup length, examined cutting structure, and more.
Instead of the conventional two-piece bit structure, engineers created the first unibody PDC drill bit from SLB. Without a joining weld, the novel design reduced makeup length by up to 2.5 in compared with the baseline design—a 37% reduction in drillbit length. The short-makeup length enabled the BHA to achieve a 64% higher build rate while dramatically reducing shock and vibration.
Equipped with the new AccuStrike bit, the BHA drilled multiple sections in one run, saving days of drilling time and reducing drilling-related carbon emissions compared with offset wells. Additionally, the operator saw a reduction in RSS tool failures, which helped extend tool maintenance and replacement periods.
