Papua New Guinea 9.5" IADC321 steel tooth tricone bit

  Basical Specification  Size of Rock Bit4  1/2”6 3/4”7”9 1/2”12” 15”114.3mm171.4mm177.8mm241.3mm304.8mm 381 mm Thread Connection2 3/8” API reg pin3 1/2”API reg pin3 1/2” API reg pin6 5/8”API reg pin6 5/8”API reg pin7 5/8” API reg pinMake up torque6.7-7.5KN.M8.5-12.2KN.M38-43.4KN.M46.1-54.2KN.M IADC Code 321 Factory Series LYB series Rubber Bearing Tricone Rock Bit  Operating ParametersWOB(Weight On Bit) 0.8-1.4 KN/MMRPM 200~80Formation Hard with high compressive strength and semi-abrasiveness, such as hard limestone, hard sandstone and dolomite,etcRecommended Drilling ParametersIADCWOB(kn/mm)RRM(r/min)Applicable Formations116 1170.35~0.8150~80Very soft formations with low compressive strength and high drillability.such as clay,mudstone,chalk,etc.126 1270.35~0.9150~70Soft formations with low compressive strength and high drillability,such as mudstone,gypsum,salt,salt,soft shale,soft limstone,etc.136 1370.35~1.0120~60Soft to medium soft formations with low compressive strength and high drillability,such as medium soft shale,hard gypsum,medium soft limestone,medium soft sandstone,soft formation with harder interbeds,etc.216 2170.4~1.0100~60Medium hard formations with high compressive strength,such as medium soft shale,hard gypsum,medium soft limestone,medium soft sandstone,soft for mations with harder interbeds etc.246 2470.4~1.080~50Medium hard formations with high compressive strength,such as abrasive shale,limestone,sandstone,dolomite,hadr gypsum,marble,etc.417 437 4470.35~0.9150~70Very soft formations with low compressive strength and high drillability,such as clay,gypsum,salt,soft shale,soft limestone,etc.517 5270.5~1.0140~60Soft formations with low compressive strength ang high drillability such as mudstone,gypsum,salt,soft shale,soft limestone,etc.537 5470.45~1.0120~50Soft to medium formations with low compressive strength,such as medium soft shale,medium soft limestone,mediun soft limestone,medium soft sandstone,medium formation with harder and abrasiver interbeds.etc.617 6270.45~1.190~50Medium hard formations with high compressive strength such as hadr shale,limestone,sandstone,dolomite,etc.6370.5~1.280~40Hard formations with high compressive strength, such as sandstone,limestone,dolomite,hard gypsum,marble,etc.Note:the upper limits of WOB and Rpm in above lable should bot used simulaneously