High Strength Reverse Circulation Drill Bits , Drill Bits For Drilling Rigs

High Strength Reverse Circulation Drill Bits , Drill Bits For Drilling Rigs Description: Hemispherical • Height 0.5 Ø • Application Strength - multipurpose • Best suited to hard ground • 25,000 to 45,000 PSI (170 to 300 MPa) • Abrasive to very abrasive Ballistic Button • Height 0.75 Ø • Application Strength - fast penetration • Best suited to soft ground • 10,000 to 20,000 PSI (70 to 140 MPa) • Non abrasive ground Parabolic Button (semi ballistic) • Height 0.6 Ø • Application