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Mining Tricone Bit TCI Bits SGA All size
DRILL BIT TYPE
USING CONDITIONS
1. Mining.
2. Water well.
3. Oil field & Gas.
4. Construction drilling application.
Grand Rotary Grand Bits have optimally designed bearing structures and carbide inserts to withstand extreme challenge of today's mining applications. Always be ready for improvement on products and providing high performance/cost products. Choosing the right designs with the balance between high ROP (Rate of Penetration) and good drilling service life which ensure the good TDC(Total Drilling Cost) for the customers.
SELECTION TABLE
Open Bearing Tri-cone bit (mining) | |||||||||||||||||||||
Type | Soft formation | medium to hard formation | hard formation | Extremely hard formation | |||||||||||||||||
Inch | mm | 412 | 422 | 432 | 442 | 512 | S22 | 532 | S42 | 612 | 622 | 632 | 642 | 712 | 722 | 732 | 742 | 812 | 822 | 832 | 842 |
6 1/4 | 159 | V | V | V | |||||||||||||||||
6 3/4 | 171 | V | V | V | V | ||||||||||||||||
7 7/8 | 200 | V | V | V | V | V | V | V | |||||||||||||
9 | 229 | V | V | V | V | V | |||||||||||||||
9 5/8 | 244 | V | |||||||||||||||||||
9 7/8 | 251 | V | V | V | V | V | V | ||||||||||||||
10 3/16 | 259 | V | |||||||||||||||||||
10S/8 | 270 | V | V | V | V | V | V | V | V | ||||||||||||
11 | 279 | V | V | V | V | ||||||||||||||||
12 1/4 | 311 | V | V | V | V | V | V | V | V | V | |||||||||||
13 3/4 | 349 | V |
Note: the , " V" in the table represents the existing IADC, and the IADC without " V" in the table can be designed.
Sealed Bearing Tri-cone bit (mining) | |||||||||||||||||||||
Type | soft formation | medium to hard formation | hard formation | Extremely hard formation | |||||||||||||||||
Inch | mm | 415 | 425 | 435 | 445 | 515 | 525 | 535 | 545 | 615 | 625 | 635 | 645 | 715 | 725 | 735 | 745 | 815 | 825 | 835 | 845 |
7 7/8 | 200 | V | V | V | V | V | V | V | V | V | V | V | |||||||||
81/2 | 216 | V | V | V | V | V | V | ||||||||||||||
8 3/4 | 222 | V | V | ||||||||||||||||||
9 | 229 | V | V | V | V | V | V | V | V | V | V | ||||||||||
9 1/2 | 241 | V | |||||||||||||||||||
9 5/8 | 244 | V | V | V | V | ||||||||||||||||
9 7/8 | 251 | y | V | V | V | V | V | V | V | V | V | V | V | V | V | ||||||
10 3/16 | 259 | V | V | V | |||||||||||||||||
10 5/8 | 270 | V | V | V | V | V | V | V | V | V | V | V | V | V | V | ||||||
11 | 279 | V | V | V | V | V | V | V | |||||||||||||
11 1/2 | 292 | V | |||||||||||||||||||
12 1/4 | 311 | V | V | V | V | V | V | V | V | V | V | V | V | ||||||||
13 3/4 | 349 | V | V | V | V | V | |||||||||||||||
15 | 381 | V |
Note: the , " V" in the table represents the existing IADC, and the IADC without " V" in the table can be designed.