.pdf asset-performance field_planning_color fit_for_purpose_color production_optimization_recovery_color kpi-box kpi-money kpi-time ::before

A customer in Aberdeen needed to cut and mill a section in 9 ⅞-in. Q-125Hy casing at 13,120 ft (3999 m) cement plug placement. The casing was a high-yield strength material which is challenging to mill without damaging conventional cutting structures.

To cut and mill the section, Baker Hughes, a GE company (BHGE), deployed the Model D™ section mill designed for fast and efficient casing milling. The knives were dressed with special, industry leading METAL MUNCHER™ advanced milling technology (AMT) carbide to provide the robustness and enhanced cutting performance needed for faster milling and increased life.

Per standard operating procedures, a surface function test was conducted before tripping the bottomhole assembly (BHA) downhole to the cutting depth. When the section mill reached target depth, the string was rotated to begin cutting. A drop in surface pressure indicated that the cut had been successfully made.

Download the PDF to read the full case study.

Challenges & Results


  • Cut a section in 9 ⅞-in. 66.90 lb/ft Q125Hy high yield strength material casing
  • Low yield point for circulating out cuttings


  • Minimized nonproductive time (NPT) through single-trip operation
  • Saved 60 hours rig time and over USD $1,250,000
  • Milled 53.15 ft (16.20 m) of casing in 30 hours