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Product Details

IADC code	Applicable Formation	Main characteristics of the bit	Recommended parameters
IADC code	Applicable Formation	Cutting structure	Normal WOB kN/mm (bit dia.)	Rotary speed (rpm)
117	Very soft with low compressive strength and high drillability,such as soft shale ,clay and salt bed,etc	Hardfaced gage and all tooth surfaces,,the gage fitted with compacts for enhanced gage protection ,and a row of trimmers is added between gage row and heel row	0.30~0.9.	300~80
127 /137	Soft with low compressive strength and high drillability,such as sale ,clay,salt bed and soft limestone,etc	Hardfaced gage and all tooth surfaces,,the gage fitted with compacts for enhanced gage protection ,and a row of trimmers is added between gage row and heel row	0.30~0.9.	300~80
427 / 437	Very soft formations with low compressive strength and high drillability,such as clay,mudstone,chalk,gypsum,salt,soft limestone, etc.	Large dia. Offset crested.scoop compacts in inner row,wedge compacts in outer row ,high compact exposure, inequable spaced compacts arrangement,and a row of trimmers is added between gage row and heel row	0.35~0.90	280~70
447 / 517 / 527	Soft formations with low compressive strength and high drillability,such as mudstone,gypsum,salt,soft limestone, etc.	Large dia. Offset crested.scoop compacts in inner row,wedge compacts in outer row ,high compact exposure, inequable spaced compacts arrangement,and a row of trimmers is added between gage row and heel row	0.35~1.05	240~50
537 /547	Medium soft with low compressive strength and harder abrasive stringers,such as hard shale,mudstone ,soft limestone and sandstone,etc	Large radius scoop compacts in inner row,wedge compacts in outer row, inequable spaced compacts arrangement ,and a row of trimmers is added between gage row and heel row	0.50~1.05	220~40
617 /627 /637	Medium hard with compressive strength and thick and hard stringers ,such as limestone ,hard shale,mudstone and sandstone,etc.	Conical compacts in inner row,spherical compacts in outer row,and a row of trimmers is added between gage row and heel row	0.50~1.10	220~40
737	Hard formation with high abrasiveness ,such as hard limestone, dolomite, hard sandstone and chert,etc	Large radius conical compacts in inner row , spherical compacts in outer row , and a row of trimmers is added between gage row and heel row.	0.50~1.20	200~40