eccentric casing systems
Overburden Casing Drilling System DTH Bit is very popular in international water well and ore drilling field.
Features
Hardening treatment of the part's surface
with longer operating life and excellent anti - wear properties.
Structural optimization
Strengthen the structural strength, easy to operate
Superior performance
Stable and reliable performance, high drilling speed
When the bore-hole is complete, the casing is retrieved to be used again.
Pros
Rapid removal of cuttings;
No use of drilling mud;
High penetration rate, especially in resistant rock formation (e.g. basalt);
Easy soil and groundwater sampling during drilling;
Possible to measure yield estimate at selected depth in the formation;
Advantage
ous in unconsolidated formations with a high risk of caving (this is probably the most important feature).
Prodrill produces the ODEX Eccentric Overburden Drilling System, starting with the ODEX90 to suit 114mm O. D. Casings. This two-piece system comprises the shank bit holder and the eccentric pilot bit that is secured in the bit holder by a double interlocking pin. This is easily removed to allow for bit are sharpening or replacement. Prodrill ODEX overburden drilling systems are widely used in a variety of applications from well drilling and mining to rock anchoring and site investigation.
Outer Dia.(A) mm | Outer Dia.(A) mm | Inner Dia.(B) mm | The Max Wall Thickness | Reamed Dia.(C) mm | Inner Dia. of Casing Shoe(D) mm | Inner Dia. Of casing shoe that pilot bit can pass through | Type of Hammer Recommended | Hammer Type(E) | Drill Pipe mm |
CEC108-CD35-84 | 108 | 96 | 6 | 118 | 86 | 84 | CD35 | DHD3.5 QL30 | 76 |
CEC114-CD35-90 | 114 | 102 | 6 | 123 | 92 | 90 | CD35 | DHD3.5 QL30 | 76 |
CEC127-CD45-97 | 127 | 109 | 9 | 138 | 99 | 97 | CD45 | DHD340A QL40 | 76 |
CEC140-CD45-115 | 140 | 128 | 6 | 152 | 117 | 115 | CD45 | DHD340A QL40 | 76 |
CEC168-CD55-140 | 168 | 156 | 6 | 185 | 142 | 140 | CD55 | DHD350R QL50 | 76/89 |
CEC178-CD55-146 | 178 | 158 | 10 | 195 | 148 | 146 | CD55 | DHD350R QL50 | 76/89 |
CEC183-CD55-150 | 183 | 163 | 10 | 200 | 152 | 150 | CD55 | DHD350R QL50 | 76/89 |
CEC194-CD65-165 | 194 | 180 | 7 | 209 | 167 | 165 | CD65 | DHD360 QL60 | 89/114 |
CEC219-CD65-190 | 219 | 205 | 7 | 237 | 192 | 190 | CD65 | DHD360 QL60 | 89/114 |
CEC245-CD85-208 | 245 | 225 | 10 | 264 | 210 | 208 | CD85 | DHD380 QL80 | 114 |
CEC273-CD85-240 | 273 | 259 | 7 | 308 | 242 | 240 | CD85 | DHD380 QL80 | 114 |
CEC325-CN100-280 | 325 | 305 | 10 | 358 | 282 | 280 | CN100 | NUMA100 SD10 | 114 |