Ua sauni le API Elastomer Sealed bearing tricone bit IADC517,IADC527,IADC537 mo tagata fa'atau o le ISA.

O le Far Eastern Drilling e taumafai mo le tulaga silisili, fa'atautaia pisinisi ma tagata fa'atau", fa'amoemoe e avea ma 'aufaigaluega sili ona lelei e galulue fa'atasi ma le pisinisi sili ona pulea mo tagata faigaluega, sapalai ma tagata fa'atau, iloa le taua o le fa'asoa ma le fa'atauga mautu mo le Oilwell Drilling Rotary Bit 7 7/8 IADC517,IADC527,IADC537 Hard Rock Tricone Bit mo Oilwell ma le Elastomer Sealed Bearing, o oloa uma e foliga mai e sili ona lelei ma fofo lelei pe a uma ona fa'atau atu. O le fa'atauaina o le maketi ma le fa'atauaina o tagata fa'atau o mea ia ua matou mulimulita'i nei i ai. Matou te lagolagoina le galulue fa'atasi e manumalo i le va o tagata.