Beijing Jietaihongli Technology Co., Ltd.
Beijing Jietaihongli Technology Co., Ltd.
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Bits with 4 pieces teeth holders of buckets and augers
The rotary drilling pick produced by our company is made of raw material alloy made of coarse particles and vacuum low pressure sintering, and high-quality 42CrMo alloy steel by forging, finishing and welding. We adopt advanced welding technology and heat treatment process to avoid the early failure of the pick due to alloy falling off during construction. The pick has a long service life, high impact resistance and wear resistance during use.
Product Advantages
| Material | Large alloy |
| Various hardness available | The most cost-effective teeth can be recommended according to various hardness and formations as per customer needs ； |
| Many choices of teeth shape | Wear-resistant weld, bar, point, dot, thread, smooth and other appearances; diversified appearances to meet different customer needs; |
| Inventory | Large inventory and spot supply; |
| Production workshop | Videos and pictures of the manufacturing process provide visible details and quality; |
| Working Performance | Comparison of working photos of domestic, international and Unicorn teeth under same construction, Unicorn teeth have better performance after use; |
| Package | Plastic boxes, unified wooden box with reinforced with sealing strips etc; |
Applicable layers: dense sand, gravel, hard rocks and very hard formation, etc..
Sizes: From 2 7/8 to 26"larger sizes for hole opener bit ,reamer bit.
Type: 437,517,537,617,637
Hardness: 50-54 or higher HRC
ROLLER BITS IADC CODE SELECTION
| IADC | WOB | RPM |
| (KN/mm) | (r/min) | |
| 111/114/115 | 0.3-0.75 | 200-80 |
| 116/117 | 0.35-0.8 | 150-80 |
| 121 | 0.3-0.85 | 200-80 |
| 124/125 | 180-60 | |
| 131 | 0.3-0.95 | 180-80 |
| 136/137 | 0.35-1.0 | 120-60 |
| 211/241 | 0.3-0.95 | 180-80 |
| 216/217 | 0.4-1.0 | 100-60 |
| 246/247 | 0.4-1.0 | 80-50 |
| 321 | 0.4-1.0 | 150-70 |
| 324 | 0.4-1.0 | 120-50 |
| 437/447/435 | 0.35-0.9 | 240-70 |
| 517/527/515 | 0.35-1.0 | 220-60 |
| 537/547/535 | 0.45-1.0 | 220-50 |
| 617/615 | 0.45-1.1 | 200-50 |
| 637/635 | 0.5-1.1 | 180-40 |
| Note: Above limitts of WOB and RRPM should not be used simultaneously | ||
ROLLER PIN SIZE
| Bit Diameter | API PIN | |
| (Inch) | (mm) | |
| 3 7/8''~5 1/4'' | 98~134 | 2 3/8''. 2 7/8'' |
| 5 5/8''~6 3/4'' | 143!171 | 3 1/2'' |
| 7 1/2''~9 1/2'' | 190.5~241 | 4 1/2'' |
| 9 5/8''~13 3/4'' | 245~350 | 6 5/8'' |
| 14 5/8''~26'' | 371~660.4 | 7 5/8'' |
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