Eccentric overburden casing drilling systems
Eccentric is the most economical solutions because its ingenious reaming wing the bit is retrievable can be used at the next hole
SINODRILLS Eccentric overburden casing drilling systems
Casing drilling, or casing while drilling (CWD) process, is a concept that combining two time-consuming processes, drilling and casing together, performing them at the same time. During the CWD process, powered by DTH hammer, a central piloting bit drives a ring bit to drill a hole wide enough for a casing tube to slide down, drilling and casing processes are therefore performed at the same time.
Eccentric is the most economical solutions because its ingenious reaming wing the bit is retrievable can be used at the next hole. This is particularly design for shallow holes, as is often the case in water well drilling, geothermal wells and for shallow micro-piling work. Odex is ideal for short holes in consolidated overburden. The component of Eccentric system consists of Pilot bits, Reamer bits, Guide device and casing shoe.
When drilling, the reamer bit will rotate out to enlarge the hole which enough for the casing tube slide down behind the reamer. When reached required depth, the drill pipe will drill to the reverse direction and the reamer bit will retract, it is allowing the whole drilling system to pass through the casing.
Features
• Complete types of drilling tools suitable for casing tubes with various diameters;
• Good stability and reliability granted by premium alloy steel material and fine CNC manufacturing process;
• Cost-effectiveness realized by mass production.
Applications
Water well drilling, geothermal well drilling, foundation piling, geological prospecting, etc.
Structure
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01 - Drill Pipe | 02 - Guide Sleeve | 03 - Steel Casing |
| 04 - DTH Hammer | 05 - Guide Device | 06 - Casing Shoe | |
| 07 - Reammer | 08 - Pilot Bit | 09- Guide Device | |
| 10 - Casing Shoe | 11 - Reammer | 12 - Pilot bit |
GSE-EDS82 Eccentric Drilling System (ODEX82)
GSE-EDS82 Eccentric Drilling System (ODEX82) shank for IR3.5 DTH Hammer (other shanks are optional)
Alternative casings may by used:
Maximum outside diameter (mm)
Minimum inside diameter (mm)
Wall thickness (mm)
108
96
6
GSE-EDS90 Eccentric Drilling System (ODEX90)
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GSE-EDS90 Eccentric Drilling System (ODEX90) shank for DHD3.5 DTH Hammer (others are optional)
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Alternative casings may be used:
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Maximum outside diameter (mm)
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115 |
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Minimum inside diameter (mm)
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102 |
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Wall thickness (mm)
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6 |
GSE-EDS115A Eccentric Drilling System (ODEX115A)
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GSE-EDS115A Eccentric Drilling System (ODEX115A) Shank for IR DHD340A DTH Hammer (others are optional)
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Alternative casings may be used:
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Maximum outside diameter (mm)
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142 |
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Minimum inside diameter (mm)
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128 |
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Wall thickness (mm)
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7 |
GSE-EDS115B Eccentric Drilling System (ODEX115B)
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GSE-EDS115B Eccentric Drilling System (ODEX115B) Shank for DHD340 DTH Hammer (others are optional)
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Alternative casings may be used:
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Manximum outside diameter (mm)
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146 |
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Minimum inside diameter (mm)
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130 |
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Wall thickness (mm)
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8 |
GSE-EDS140 Eccentric Drilling System (ODEX140)
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GSE-EDS140 Eccentric Drilling System (ODEX140) Shank for IR DHD350R DTH Hammer (others are optional)
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Alternative casings may be used:
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Maximum outside diameter (mm)
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168 |
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Minimum inside diameter (mm)
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152 |
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Wall thckness (mm)
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8 |
GSE-EDS145 Eccentric Drilling System (ODEX145)
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GSE-EDS145 Eccentric Drilling System (ODEX145) Shank for IR DHD350R DTH Hammer (others are optional)
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Alternative casings may be used:
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Maximum outside diameter (mm)
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178 |
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Minimum inside diameter (mm)
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158 |
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Wall thickness (mm)
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9 |
GSE-EDS147 Eccentric Drilling System (ODEX147)
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GSE-EDS147 Eccentric Drilling System (ODEX147) Shank for IR DHD350R DTH Hammer (others are optional)
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Alternative casing may be used:
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Maximum outside diameter (mm)
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183 |
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Minimum inside diameter (mm)
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163 |
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Wall thickness (mm)
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10 |
GSE-EDS165 Eccentric Drilling System (ODEX165)
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GSE-EDS165 Eccentric Drilling System (ODEX165) Shank for IR DHD360 DTH Hammer (others are optional)
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Alternative casings may be used:
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Maximum outside diameter (mm)
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195 |
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Minimum inside diameter (mm)
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182 |
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Wall thickness (mm)
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6.5 |
GSE-EDS180 Eccentric Drilling System (ODEX180)
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GSE-ED180 Eccentric Drilling System (ODEX180) Shank for DHD360, COP64, SD6 DTH Hammer
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Alternative casing may be used:
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Maximum outside diameter (mm)
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219 |
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Minimum inside diameter (mm)
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194 |
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Wall thickness (mm)
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12.5 |
GSE-EDS190 Eccentric Drilling System (ODEX190)
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GSE-EDS190 Eccentric Drilling System (ODEX190) Shank for IR DHD360 DTH Hammer (others are optional)
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Alternative casings may be used:
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Maximum outside diameter (mm)
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219 |
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Minimum inside diameter (mm)
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205 |
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Wall thickness (mm)
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7 |
GSE-EDS230 Eccentric Drilling System (ODEX230)
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GSE-EDS230 Eccentric Drilling System (ODEX230) Shank for IR DHD380 DTH Hammer (others are optional)
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Alternative casings may be used:
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Maximum outside diameter (mm)
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273 |
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Minimum inside diameter (mm)
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250 |
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Wall thickness (mm)
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11.5 |
GSE-EDS240 Eccentric Drilling System (ODEX240)
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GSE-EDS240 Eccentric Drilling System (ODEX240) Shank for IR DHD380 DTH Hammer (others are optional)
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Alternative casings may be used:
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Maximum outside diameter (mm)
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273 |
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Minimum inside diameter (mm)
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260 |
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Wall thickness (mm)
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6.5 |
Please contact our sales team for more specifications.
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