Operator significantly reduces mud weight to reduce risk and ECD, increase flow rate, and improve hole cleaning

• Depleted pore pressure and fracture gradient
• Narrow margin between stability and fracture → high risk
• High mud weight for stability → high ECD
• High solids to control losses → poor hole cleaning
• High annular loading → lost circulation and slow drilling

• Close circulation drilling with the HOLD 2500 rotating control device
• Control bottomhole pressure with the automated DAPC™ system
• Reduce static MW by 1.2 ppg below pore pressure
• Eliminate LCM solids
• Increase flow rate 27% to 650 gpm

Reduced ECD and annular loading
Eliminated lost circulation
Reduced non-productive time
Reduced drilling time and risk
Improved hole cleaning