4 wings step drag bit ( 219mm ) 8 5/8' x 3 1/2' API for soft rock formation
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- Supplier: Guizhou Sinodrills Equipment Co. Ltd.
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Product Overview
Description
4 wings step drag bit ( 219mm ) 8 5/8'' x 3 1/2'' API for soft rock formation
Product Description
A drag bit is a drill bit usually designed for use in soft formations such as sand, clay, or some soft rock. However, they will not work well in coarse gravel or hard rock formations. Uses include drilling water wells, mining, geothermal, jet grouting ,environmental and exploration drilling. Whenever possible, they should be used to drill pilot holes because they produce cuttings that are easiest to log.
Drag bits are economical tools when drilling softer geological formations and shallower depths. Sinodrills is the biggest supplier of drag bits in China, we supply both step drag bits and chevron drag bits. Chevron drag bits are usually used for drilling more abrasive formations like soft sandstons and shales. Chevron drag bits are more durable than step drag bits because of cutting structuer, but penetrate more slowly. We offer a comprehensive range of step drag bits as below:
Drag bits diameters: 3 7/8” ~ 26”;
Connection threads: N-Rod, AW, 2 3/8’’ API Reg, 2 7/8’’ API Reg, 3 1/2’’ API Reg, 4 1/2’’ API Reg, 6 5/8’’ API Reg, 2 7/8’’ API IF, etc.
Wings: Three wings, four wings;
Why our drag bit design is strengthened & robust:
1, bits' body and wings are integrated casting instead of welding them together ;
2, Copper brazing tungsten carbide insertion welding technology instead of silver soldering. Copper brazing make the tungsten carbide very hard to drop and break.Meanwhile ,in the brazing process,the wings also get a good hot treatment.
3, Use high grade carbide inserts only;
4, More steps, faster penetration ;
5, Thickened wings.
Size selection
| 3 wings step drag bit | |||
| Diameter | Thread | Part No. | |
| 2" | 50.8 mm | optional | 3S2 |
| 2 1/2" | 63.5mm | optional | 3S212 |
| 2 5/8" | 66.7 mm | optional | 3S258 |
| 2 3/4" | 69.9 mm | optional | 3S234 |
| 2 7/8" | 73.0 mm | optional | 3S278 |
| 2 15/16" | 74.6 mm | optional | 3S21516 |
| 3" | 76.2 mm | optional | 3S3 |
| 3 1/8" | 79.4 mm | optional | 3S318 |
| 3 1/4" | 82.6 mm | optional | 3S314 |
| 3 1/2" | 88.9 mm | optional | 3S312 |
| 3 5/8" | 92.1 mm | optional | 3S358 |
| 3 3/4" | 95.3 mm | optional | 3S334 |
| 3 7/8" | 98.4 mm | optional | 3S378 |
| 4" | 101.6 mm | optional | 3S4 |
| 4 1/8" | 104.8 mm | optional | 3S418 |
| 4 1/4" | 108.0 mm | optional | 3S414 |
| 4 1/2" | 114.3 mm | optional | 3S412 |
| 4 5/8" | 117.5 mm | optional | 3S458 |
| 4 3/4" | 120.7mm | optional | 3S434 |
| 4 7/8" | 123.8mm | optional | 3S478 |
| 5" | 127.0mm | optional | 3S5 |
| 5 1/8" | 130.2mm | optional | 3S518 |
| 5 1/4" | 133.4mm | optional | 3S514 |
| 5 3/8" | 136.5mm | optional | 3S538 |
| 5 1/2" | 139.7mm | optional | 3S512 |
| 5 5/8" | 142.9mm | optional | 3S558 |
| 5 3/4" | 146.1mm | optional | 3S534 |
| 5 7/8" | 149.2mm | optional | 3S578 |
| 6" | 152.4mm | optional | 3S6 |
| 6 1/8" | 155.6mm | optional | 3S618 |
| 6 1/4" | 158.8mm | optional | 3S614 |
| 6 1/2" | 165.1mm | optional | 3S612 |
| 6 5/8" | 168.3mm | optional | 3S658 |
| 6 3/4" | 171.5mm | optional | 3S634 |
| 6 7/8" | 174.6mm | optional | 3S678 |
| 7" | 177.8mm | optional | 3S7 |
| 7 1/8" | 181.0mm | optional | 3S718 |
| 7 1/4" | 184.2mm | optional | 3S714 |
| 7 3/8" | 187.3mm | optional | 3S738 |
| 7 1/2" | 190.5mm | optional | 3S712 |
| 7 5/8" | 193.7mm | optional | 3S758 |
| 7 3/4" | 196.9mm | optional | 3S734 |
| 7 7/8" | 200.0mm | optional | 3S778 |
| 8" | 203.2mm | optional | 3S8 |
| 8 1/8" | 206.4mm | optional | 3S818 |
| 8 1/4" | 209.6mm | optional | 3S814 |
| 8 1/2" | 215.9mm | optional | 3S812 |
| 8 5/8" | 219.1mm | optional | 3S858 |
| 8 3/4" | 222.3mm | optional | 3S834 |
| 8 7/8" | 225.4mm | optional | 3S878 |
| 9" | 228.6mm | optional | 3S9 |
| 9 1/8" | 231.8mm | optional | 3S918 |
| 9 1/4" | 235.0mm | optional | 3S914 |
| 9 1/2" | 241.3mm | optional | 3S912 |
| 9 5/8" | 244.5mm | optional | 3S958 |
| 9 3/4" | 247.7mm | optional | 3S934 |
| 9 7/8" | 250.8mm | optional | 3S978 |
| 10" | 254.0mm | optional | 3S10 |
| 10 5/8" | 269.9mm | optional | 3S1058 |
| 11 1/2" | 292.1mm | optional | 3S1112 |
| 12" | 304.8mm | optional | 3S12 |
| 12 1/4" | 311.2mm | optional | 3S1214 |
| 12 1/2" | 317.5mm | optional | 3S1212 |
| 13 3/4" | 349.3mm | optional | 3S1334 |
| 14" | 355.6mm | optional | 3S14 |
| 14 3/4" | 374.7mm | optional | 3S1434 |
| 15" | 381.0mm | optional | 3S15 |
| 15 3/4" | 400.1mm | optional | 3S1534 |
| 17 1/2" | 444.5mm | optional | 3S1712 |
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