Business Type: Trading Company
Xiamen, Fujian, China
|437/447/435||0.35~0.9||240~70||Very soft formations with low compressive strength and high drillability,|
such as clay,mudstone,chalk,gypsum,salt,soft limestone, etc.
|517/527/515||0.35~1.0||220~60||Soft formations with low compressive strength and high drillability,|
such as mudstone,gypsum,salt,soft limestone, etc.
|537/547/535||0.45~1.0||220~50||Soft to medium formations with low compressive strength, |
such as medium, soft shale, medium soft limestone,
medium soft sandstone, medium formation with harder and abrasive interbeds, etc.
|617/615||0.45~1.1||200~50||Medium hard formation with high compress strength, |
such as hard shale, limestone, sandstone, dolomite. etc
|637/635||0.5~1.1||180~40||Hard formations with high compressive strength, |
such as sandstone, limestone, dolomite ,hard gypsum, marble, etc.
|Note: The upper limits of WOB and RPM in above table should not be used simultaneously.|