Medium Hard Rock Drill Bits / Three Cone Bit With Higher Compressive Strength
Rock Bit , Medium hard with higher compressive strength as well as thick and streaks , TCI Bit
RECOMMENDED DRILLING PARAMETERS FOR APPLICATION
|
Types & IADC Code |
417 |
437 447 |
517 527 |
517 527 |
537 547 |
617 627 |
637
|
|
|
WOB |
KN/mm(Bit Dia.) |
0.4~0.9 |
0.4~0.9 |
0.35~1.0 |
0.35~1.0 |
0.5~1.0 |
0.6~1.1 |
0.7~1.2 |
|
Lb/in. (Bit Dia.) |
2285~5142 |
2285~5142 |
2000~5714 |
2000~5714 |
2857~5714 |
3428~6285 |
4000~6857 |
|
|
Rotation Speed (Rpm) |
140~60 |
240~70 |
125~50 |
~60 |
110~50 |
100~40 |
80~4 |
|
ROLLER CONE BIT CUTTING STRUCTURE
The teeth of a milled tooth bit and the inserts of an insert bit for the cutting structure of the bit.
The selection of a milled tooth or insert bit is largely based on the hardness of the formation to be drilled.
The design of the cutting structure will therefore be based on the hardness of the formation for which it will be used.
The main considerations in the design of the cutting structure is the height and spacing of teeth or inserts.
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