Bit type | IADC Code | Applicable formation | Main characteristics of the bit | Recommended parameters | |
Cutting structure | Normal WOB KN/mm(bit dia.) | Rotary Speed(rpm) | |||
TGJ115 | 115 | Very soft with low compressive strength and high drillability,such as soft shale,clay and salt bed,etc. | Hardfaced gage and all tooth surfaces. | 0.200.70 | 35080 |
TGJ135 | 135 | Soft to medium soft or soft with harder stringers,such as hard gypsolyte,soft limestone and sandstone,etc. | Hardfaced gage and all tooth surfaces. | 0.200.70 | 35080 |
TGJ415 | 415 | Very soft with very low compressive strength,such as shale,clay,sandstone and soft limestone,etc. | Large dia offset crested scoop compacts in inner row,wedge compacts in outer row,and inequable spaced compacts arrangement. | 0.200.60 | 35080 |
TGJT415 | 415 | Very soft with very low compressive strength,such as shale,clay,sandstone and soft limestone,etc. | Large dia offset crested scoop compacts in inner row,wedge compacts in outer row,and inequable spaced compacts arrangement. | 0.200.60 | 35080 |
TGJ435 | 435 | Soft with low compressive strength,such as shale,clay,sandstone,soft limestone,salt bed and hard gypsolyte,etc. | Large dia offset crested scoop compacts in inner row,wedge compacts in outer row | 0.200.70 | 35080 |
TGJT435 | 435 | Soft with low compressive strength,such as shale,clay,sandstone,soft limestone,salt bed and hard gypsolyte,etc. | Large dia offset crested scoop compacts in inner row,wedge compacts in outer row | 0.200.70 | 35080 |
TGJ515G | 515 | Soft with low compressive strength and high drillability,such as shale,clay,sandstone and soft limestone,etc. | Offset crested scoop compacts in inner row,wedge compacts in outer row and inequable spaced compacts arrangement. | 0.200.80 | 35080 |
