Please specify the following on enquiry, Diameter IADC code Thread Connection Bearing structure Drilling formationSize 4 5/8” (117.4mm) IADC 517G Bearing Type Elastomer sealed journal bearing Thread Connection 2 7/8 reg pin WOB(KN/mm) 0.35~1.0 RPM(r/min) 140~60 Applicable Formations Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestone, etc. Circulation system Mud pump
