Zhuzhou, Hunan, China
Business Type: Manufacturer/Factory, Trading Company
The two rotary heads are typically mounted on separate sleds which can be adjusted independently to control the position of the inner string in relation to the casing bit.
The inner bit can be advanced in front of the casing bit to act as a pilot bit for the casing string or it can be retracted inside the casing crown reaming bit to better contain flushing inside the casing.
Application range
Suitable for geothermal drill for grouting, sampling, water well drill, foundation drill etc.
Technical Data | ||||||
A | B | C | D | E | F | G |
outer dia | reamed dia | inner dia | thread | drill rod | drill bit dia | thread |
(mm) | (mm) | (mm) | mm | mm | mm | |
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 |