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Produktbeskrivning
IADC
|
Recommended Parameter
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Formation
|
|
WOB KN/mm (bit dia.)
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RPM(r/min)
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||
417\437\447
|
0.35~0.8
|
240~60
|
Very soft low compressive strength and high drillability,such as clay,soft mudstone,shale,salt,loose sands,etc.
|
517\527
|
0.35~1.0
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220~50
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Very soft with low compressive strength and high drillability,such as mudstone,salt,soft limestone,sands,etc.
|
537\547
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0.45~1.0
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220~50
|
Medium soft with harder,more abrasive streaks,such as hard shale,mudstone,soft limestone,etc.
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617\627
|
0.45~1.1
|
200~50
|
Medium hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc.
|
637
|
0.45~1.1
|
180~40
|
Medium hard with higher compressive strength as well as thick and hard streaks,such as hard shale,sands,limestone,dolomite,etc.
|
737
|
0.7~1.2
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180~40
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Hard with high abrasiveness such as hard limestone,dolomite,firm sands,etc.
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827\837
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0.7~1.2
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150~60
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Very hard with high abrasiveness,such as quartzite,quartzitic sand,chert,basalt,granite,etc.
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