Integrated Well Abandonment System Eliminates Trips, Saves More Than 3 Rig Days, North Sea

Single-trip P&A BHA mills windows in 9 5/8-in casing and underreams to 13 1⁄2 in


Mill a window in 9 5/8-in casing and underream open hole to enable rock-to- rock barrier placement in a single trip P&A operation.


Use ProMILL* trip-saving milling and underreaming system to eliminate dedicated trip to surface.


  • Milled and reamed 85-ft window at MD of 9,000 ft with single assembly.
  • Repeated operation on three wells.
  • Saved more than 24 hours per well.