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| Place of Origin | CHINA |
| Brand Name | ROSCHEN |
| Certification | ISO |
| Model Number | 8 1/2 |
8 1/2 Inch TCI And Steel Tooth Tricone Drill Bit , Rock Drilling Tools
TCI and Steel Tooth Tricone Bit for Water Well Drilling
8 1/2 inch TCI and Steel Tooth Tricone Bit for Water Well Drilling
Roschen tricone bit used for geoloical prospecting, development of oil and gas, drilling water wells, blast holes and making holes for seismic prospecting, construction engineering.now there are eleven common types of tricone rock bits.
Steel teeth series: IADC CODE:116,117,126,127,136,137,216,217,317,337,
TCI series: IADC CODE: 417,437,447,517,527,537,547,617,627,637,647,737,837.
TCI tricone bit, tci roller Bits, roller bit, steel tooth roller bit, TCI roller bit, TCI tricone bit.
1. Sizes rang from 3 7/8" to 26"
2. Covers almost all IADC code. 3.Reliable quality and reasonable price
Normal IADC Code Tricone Roller Bit:
437 Soft Formation TCI Tricone Bits:
The 437 TCI bits are used to drill low compressive strength, very soft formations. TCI bits maximize the use of both conical and chisel tungsten carbide inserts of large diameters and high projection. This cutting structure design, combined with maximum cone offset, results in high bit penetration rates. The deep intermesh of cutter rows prevents bit bailing in sticky formations.
517 Medium Formation TCI Tricone Bits:
The 517 features aggressive chisel tungsten carbide inserts on the heel rows and inner rows. This design provides a fast drilling rate and added cutting structure durability in medium-to-medium hard formation. The HSN rubber O-ring provides adequate sealing for bearing durability.
637 Hard Formation TCI Tricone Bits:
The 637 bits can be used to drill hard and abrasive formation. Wear-resistant tungsten carbide inserts are used in the outer rows to prevent loss of bit gauge. Maximum numbers of hemispherical-shaped inserts are used in all rows to provide cutter durability and long life.
617 Medium-Hard Formation TCI Tricone Bits:
The 617 features robust chisel tungsten carbide inserts on the heel row and conical on the inner rows. This design provides a fast drilling rate and added cutting structure durability in medium to medium hard formations. The HSN rubber O-ring provides adequate sealing for bearing durability.
| Specification of Tricone Roller bits: | |||
| IADC | WOB | RPM | Application |
| (KN/mm) | (r/min) | ||
| 111/114/115 | 0.3-0.75 | 200-80 | very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk |
| 116/117 | 0.35-0.8 | 150-80 | very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk |
| 121 | 0.3-0.85 | 200-80 | soft formations with low compressive strength and high drill ability, like mudstone, gypsum, salt, soft limestone |
| 124/125 | 180-60 | ||
| 131 | 0.3-0.95 | 180-80 | soft to medium formations with low compressive strength, like medium, soft shake, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds |
| 136/137 | 0.35-1.0 | 120-60 | |
| 211/241 | 0.3-0.95 | 180-80 | medium formations with high compressive strength, like medium, soft shake, hard gypsum, medium soft limestone, medium soft sandstone, soft formation with harder interbeds. |
| 216/217 | 0.4-1.0 | 100-60 | |
| 246/247 | 0.4-1.0 | 80-50 | medium hard formation with high compressive strength, like hard shale, limestone, sandstone, dolomite |
| 321 | 0.4-1.0 | 150-70 | medium abrasive formations, like abrasive shale, limestone, sandstone, dolomite, hard gypsum, marble |
| 324 | 0.4-1.0 | 120-50 | |
| 437/447/435 | 0.35-0.9 | 240-70 | very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk, gypsum, salt, soft limestone |
| 517/527/515 | 0.35-1.0 | 220-60 | soft formations with low compressive strength and high drill ability, like mudstone, gypsum, salt, soft limestone |
| 537/547/535 | 0.45-1.0 | 220-50 | soft to medium formations with low compressive strength, like medium, soft shake, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds |
| 617/615 | 0.45-1.1 | 200-50 | medium hard formation with high compressive strength, like hard shale, limestone, sandstone, dolomite |
| 637/635 | 0.5-1.1 | 180-40 | hard formation with high compressive strength, like limestone, sandstone, dolomite, hard gypsum, marble |
| Note: Above limits of WOB and RRPM should not be used simultaneously | |||
| Diameter of Tricone Roller bit: | |||
| Size | Steel tooth bit | TCI bit | |
| in | mm | Weight(kgs) | Weight(kgs) |
| 3 7/8 | 98.4 | 5 | 6 |
| 4 5/8 | 117.5 | 6 | 6.5 |
| 5 7/8 | 149.2 | 17 | 18 |
| 6 | 152.4 | 18 | 19.5 |
| 6 1/2 | 165.1 | 19 | 22 |
| 7 7/8 | 200 | 29 | 29.5 |
| 8 1/2 | 215.9 | 35 | 38 |
| 8 3/4 | 222.2 | 36 | 40 |
| 9 1/2 | 241.3 | 57 | 59 |
| 9 7/8 | 250.8 | 58 | 60 |
| 10 5/8 | 269.9 | 66 | 74 |
| 12 1/4 | 311.1 | 85 | 111 |
| 13 5/8 | 346.1 | 118 | 120 |
| 14 3/4 | 374.6 | 140 | 160 |
| 17 1/2 | 444.5 | 230 | 255 |
| 20 | 508 | 428 | 443 |
| 22 | 558.8 | 520 | 560 |
| 26 | 660.4 | 720 | 810 |
For more information please contact:
ROSCHEN INC.
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED
Skype: ROSCHEN.TOOL , ROSCHEN_GROUP
WeChat: +86-137 6419 5009 ; +86-135 8585 5390
WhatsApp: +86-137 6419 5009 ; +86-135 8585 5390
Email: roschen@roschen.com ; roschen@roschen.net
Website: http://www.roschen.com ; http://www.roschen.net
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