The deep formation has a high degree of hardness and abrasivity;the bit type selection is difficult and the ROP is low especially under the high density mud.
深井段地层的硬度高、研磨
,
头选型困难,特别是在高密度条件下机械
速
。
The deep formation has a high degree of hardness and abrasivity;the bit type selection is difficult and the ROP is low especially under the high density mud.
深井段地层的硬度高、研磨
,
头选型困难,特别是在高密度条件下机械
速
。
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,
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