-
Cyflenwr API darnau drilio ffynhonnau craig dwfn IADC537 9 5/8″(244.5mm)
-
Bit botwm API TCI IADC537 9 7/8″(250mm) ar gyfer drilio ffynhonnau craig galed
-
Bit Botwm Cylchdroi IADC537 3 7/8″ (98mm)
-
Darnau drilio tricon IADC537 4 3/4″ (120.6mm)
-
Dril tricone API IADC537 14 3/4″ (374mm) ar gyfer craig galed
-
Darnau Tricone IADC537 4 5/8″ (118mm)
-
Darn craig tricon API IADC537 5 1/4″ (133mm)
-
Darn drilio craig API IADC537 5 1/2” (139.7 mm) ar gyfer ffynhonnau caled
-
Darnau drilio API IADC537 5 5/8″ (142.9mm)
-
Darnau drilio carbid twngsten cyflymder uchel IADC537 5 7/8″ (149mm)
-
Darnau craig tricon IADC537 6 modfedd (152.4 mm)
-
Bit tricon cylchdro IADC537 6 1/4 modfedd (159 mm)