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Drill Bit Concentric Overburden Drilling System With Rings
Overburden drilling systems are widely used in a variety of applications from well drilling and minipilling to rock anchoring and site investigation.
This is easily removed to allow for bit are sharpening or replacement. It is the most economical solutions because its ingenious reaming wing the bit is retrievable can be used at the next hole.
Type | Casing OD (mm) | Casing Min ID (mm) | Reaming Diameter (mm) | Casing Shoe Min ID (mm) | Pilot Bit Max OD (mm) | DTH Hammer |
GL70A-70-89 | 89 | 77 | 98 | 71 | 70 | GL70A |
GL90-85-108 | 108 | 94 | 112 | 86 | 85 | GL90/GL90-I |
GL335-85-108 | 108 | 94 | 114 | 88 | 86 | GL335 |
GL335-90-114 | 114 | 98 | 127 | 91 | 90 | GL335 |
GL335-100-127 | 127 | 114 | 136 | 101 | 100 | GL335 |
GL110-120-146 | 146 | 130 | 156 | 121 | 120 | GL110 |
GL4.5-120-146 | 146 | 130 | 156 | 121 | 120 | GL4.5 |
GL340-120-146 | 146 | 130 | 156 | 121 | 120 | GL340 |
GL350-140-168 | 168 | 152 | 180 | 142 | 140 | GL350/355/355K |
GL350-145-178 | 178 | 160 | 183 | 146 | 145 | GL350/355/355K |
GL350-150-183 | 183 | 165 | 190 | 152 | 150 | GL350/355/355K |
GL360-186-219 | 219 | 194 | 240 | 187 | 186 | GL360 |
GL360-194-219 | 219 | 194 | 240 | 195 | 194 | GL360 |
GL360-203-219 | 219 | 203 | 240 | 206 | 203 | GL360 |
GL380-203-219 | 219 | 205 | 240 | 206 | 203 | GL380 |
GL380-203-245 | 245 | 232 | 266 | 206 | 203 | GL380 |
GL380-241-273 | 273 | 260 | 305 | 244 | 241 | GL380 |
Code annotation of casing reamer bit as bellow | ||||||
Example: GL350-140-168 | ||||||
GL350(Equal to DHD350)=Hammer type, 140= Pilot Bit Max OD (mm), 168=O.D of casing pipe(mm) |
• Complete types of drilling tools suitable for casing tubes with various diameters;
• Good stability and reliability granted by premium alloy steel material;
• Cost-effectiveness realized by mass production.
-Middle-low/high air pressure DTH hammers & bits
-Big hole high air pressure DTH hammer using in water well, oil, gas and construction drilling.
-Eccentric overburden drilling system
-Hole opener bit
-Shank adapter, coupling sleeves and all kinds of adapters