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Basical Specification | |
Size | 4 5/8inch |
IADC code | 447 |
Thread | 2 7/8inch |
Bearing type | Rubbr sealed |
Weight | 20 kg |
Operating parameter | |
RPM(r/m) | 150~70 |
WOB(KN/mm) | 0.35~0.9 |
Formation | soft to medium soft with low compressive strength or soft with harder stringers,such as hard gypsolyte,soft limestone and sandstone,etc. |