IADC WOB(kN/mm)(bit dia) RPM(r/min) Applicable Formations
417 437 447 0.35--0.9 150--70 Very soft formations with low compressive strength and high drillablility ,such as clay, mudstone,chalk ,gypsum,salt, soft shale soft limestone,etc
517 527 0.35--1.0 140--60 Soft formations with low compressive strength and high drillablility such asmudstone,gypsum,salt,soft shale,soft
limestone ,etc.
537 547 0.45--1.0 120--50 soft to medium formations with low compressive strength ,such as medium soft shale ,medium soft limestone,medium soft limestone,medium soft sandstone,medium formation with harder and more abrasive interbeds.etc
617 627 0.45--1.1 90--50 Medium hard formations with high compressive strength such as hard shale.limestone,sandstone,dolomite,etc
637 0.5--1.2 80--40 Hard formations with high compressive strength,such as sandstone,limestone,dolomite,hard gypsum,marble,etc
Crystal
Web:http://www.bjleeding.com/
Email:leedingj@163.com
417 437 447 0.35--0.9 150--70 Very soft formations with low compressive strength and high drillablility ,such as clay, mudstone,chalk ,gypsum,salt, soft shale soft limestone,etc
517 527 0.35--1.0 140--60 Soft formations with low compressive strength and high drillablility such asmudstone,gypsum,salt,soft shale,soft
limestone ,etc.
537 547 0.45--1.0 120--50 soft to medium formations with low compressive strength ,such as medium soft shale ,medium soft limestone,medium soft limestone,medium soft sandstone,medium formation with harder and more abrasive interbeds.etc
617 627 0.45--1.1 90--50 Medium hard formations with high compressive strength such as hard shale.limestone,sandstone,dolomite,etc
637 0.5--1.2 80--40 Hard formations with high compressive strength,such as sandstone,limestone,dolomite,hard gypsum,marble,etc
Crystal
Web:http://www.bjleeding.com/
Email:leedingj@163.com
Certificate
- API ISO9001
Main Products
PDC bits Matrix Body PDC bits, Tricone bits, Drag bits and so on