Carbonates & dolomites • Interbedded hard streaks • Build/hold & horizontals with limited WOB • Re‑entry and cement drill‑outs • Problem shales
120 mm (4¾"), 172 mm (6¾"), 203–210 mm (8–8¼"), 240 mm (9½"). API connections: 3½ Reg / 4½ Reg / 6⅝ Reg / 7⅝ Reg. Full operating specifications are available in the datasheet.