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Drill bits are cutting tools used to remove material to create holes, almost always of circular cross-section. Drill bits come in many sizes and shapes and can ...
The classification of geological formation type the bit can drill is as follows: (1) or (2) Soft and soft sticky – Highly drillable formations such as clay, marl, gumbo and unconsolidated sands. (3) Soft-medium – Low compressive strength sands, shales and anhydrites with hard layers intermixed.
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