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| Type: | Drill Bit | Machine Type: | Drilling Equipment |
|---|---|---|---|
| Material: | Stainless Steel | Processing Type: | Forging |
| Use: | Ore Mining |
Application Range(Top hammer type driling inside the case) It can be widely used in drilling for grouting holes in projects such as cofferdam,foundation and geolhermal well and etc.
1.firstly,connect the crown opener bit and the outer casing tube,the drill head of the rig impacts the advancing of the outer casing tube,until the completion of the first tube.
2.The inner opener bit is connected with the drill rod,the drill head alongside the bore of the outer tube,until the completion of the first tube.
3.Connect the drill rod and the tube,the drill head of the rig push forward the wxtemal casing tube altogether with the drill rod until the external casing tube is into the desired depth.
4.No need to add any casing tube in the base rock ,only apply with the drill rod to push down to the desired depth.
| Double Casing Technical Date | ||||||
| A | B | C | D | E | F | G |
| Outer Dia.(mm) | Reamed Dia.(mm) | Inner Dia.(mm) | Thread(mm) | Drill rod(mm) | Drill Bit Dia.(mm) | Thread |
| 118 | 125 | 88 | 104.5 | 76 | 83 | R56 |
| 133 | 140 | 108 | 122 | 76 | 102 | R56 |
| 146 | 152 | 120 | 134 | 89 | 116 | R78 |
| 168 | 172 | 133 | 146.5 | 114 | 128 | R83 |
| 216 | 225 | 178 | 203 | 114 | 165 | R102 |
