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An operator working in Midland County, Texas was drilling the 12 ¼ in. vertical intermediate section in the Midland Basin, but was having some challenges. The interval consists primarily of interbedded formations and high-strength stringers, causing a high degree of impact damage on their drill bits, and necessitating multiple bits to complete the section. Their average ROP was also constrained by erratic directional control, resulting in frequent deviation corrections using only the motor to steer. The operator’s main goal was to drill the entire intermediate section with one bit with and a high rate of penetration (ROP).

Baker Hughes, a GE company (BHGE), proposed a Dynamus™ extended-life drill bit equipped with StayTrue™ shaped diamond element technology to improve the operator’s ROP and enable them to drill the interval in one run. The Dynamus bit is engineered to be highly robust, enabling operators to drill further and faster in challenging applications. StayTrue elements feature an exclusive chisel-shaped cutting geometry which improves lateral stability and leads to enhanced drilling efficiency and overall durability improvements. The Dynamus bit also included an upgraded bit body material and more robust depth of cut control to enable the operator to meet their overall objectives for the well.

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Challenges & Results
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Challenges

  • Drill vertical intermediate section through interbedded formations with up to a 15° build
  • Reduce cutting structure damage from lateral vibrations
  • Increase ROP by preventing frequent slides to correct for deviation

Results

  • Drilled 6,194 ft – the longest run in the interval
  • Increased rate of penetration by 32%