ROSCHEN GROUP
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ODEX ECCENTRIC CASING DRILLING SYSTEM
Tackle unstable soils, flowing sands, gravel, and challenging overburden conditions with unmatched efficiency and reliability using the ODEX ECCENTRIC CASING DRILLING SYSTEM. This innovative, patented technology is the industry benchmark for simultaneously drilling and casing boreholes in demanding subsurface environments where conventional methods fail or prove costly.
How the Revolutionary ODEX System Works:
The core genius lies in its unique eccentric underreamer bit:
Pilot Drilling: A standard drill bit (housed within the eccentric reamer) starts the pilot hole.
Eccentric Underreaming: As rotation begins, centrifugal force swings the larger-diameter, offset eccentric reamer outwards.
Simultaneous Casing: This enlarged hole, created by the whirling eccentric reamer, provides the perfect clearance for the casing (hollow drill pipe) to follow immediately behind the bit.
Continuous Protection: The casing is advanced concurrently with the drilling process, providing instantaneous hole support and preventing collapse, fluid ingress, or contamination.
Drilling through formations with loose unconsolidated formation always comes with problems such as the bore hole caving in or collapsing.
*RELATED PARTS LIST*
*WORKING PROCEDURE*
Key Features & Advantages:
• Unmatched Hole Stability: Instantly stabilizes boreholes in collapsing soils, running sands, gravel, boulders, and fractured rock. Eliminates hole washout and cave-ins.
• Superior Efficiency: Drilling and casing in a single pass drastically reduces time, labor, and overall project costs compared to conventional "drill-then-case" methods.
• Minimal Environmental Impact: Prevents fluid migration between aquifers, protects groundwater quality, and minimizes drilling fluid loss into formations. Ideal for environmentally sensitive sites.
• Versatility: Proven effective for a wide range of applications: Geotechnical site investigation, water well installation (especially in difficult formations), foundation piling, ground anchoring, micro-tunneling pilot holes, geothermal loop installation, and grout hole drilling.
• Penetrates Obstructions: Effectively drills through cobbles, boulders, and debris within unconsolidated overburden.
• Reduced Risk: Significantly lowers the risk of stuck tools, lost holes, and costly delays associated with unstable ground conditions.
• Flush Joint Casing: Utilizes robust, flush-threaded casing for smooth advancement and optimal performance.
• Proven Reliability: Decades of global success attest to the system's durability and effectiveness in the toughest ground conditions.
ODEX ECCENTRIC CASING DRILLING SYSTEM - Typical Parameters
| ODEX ECCENTRIC CASING DRILLING SYSTEM - Typical Parameters | ||
| Parameter | Typical Range/Options | Notes |
| Casing Diameter (OD) | 114 mm (4.5"), 140 mm (5.5"), 168 mm (6.5"), 194 mm (7.5") | Most common sizes. Larger/custom available. |
| Drilled Hole Diameter | ~ 1.3x - 1.5x Casing OD | Determined by Eccentric Reamer size. |
| Reamer Material | Tungsten Carbide Inserts, Hard Alloy Steel | High wear resistance. |
| Casing Type | Flush Joint, High-Tensile Steel | Ensures strength and smooth advancement. |
| Driving Method | Top-Hammer (DTH Hammers), Rotary (Down-the-Hole or ODEX Hammer) | Compatible with standard drilling rigs. |
| Typical Depths | Up to 100+ meters (300+ feet) | Depends on ground conditions & rig capacity. |
Specifications:
| ODEX Type | Recommended Casing Size | Min. Wall Thickness | Pilot Bit Diameter | Reamer Diameter | For Shanks of Hammer | ||||||
| Max. OD | Min. ID | ||||||||||
| mm | inch | mm | inch | mm | inch | mm | inch | mm | inch | ||
| 90 | 115 | 4 1/2 | 102 | 4 | 6 | 15/64 | 90 | 3 35/64 | 123 | 4 27/32 | DHD3.5, Cop34, Mission 30 |
| 115 | 142 | 5 19/32 | 125 | 4 59/64 | 7 | 9/32 | 115 | 4 17/32 | 155 | 6 7/64 | DHD340A, SD4, QL40, Mission40 |
| 115 | 146 | 5 3/4 | 128 | 5 3/64 | 7 | 9/32 | 116 | 4 9/16 | 152 | 6 | |
| 140 | 168 | 6 5/8 | 152 | 5 63/64 | 8 | 5/16 | 140 | 5 1/2 | 189 | 7 7/16 | DHD350R, SD5, QL50, Mission50 |
| 144 | 178 | 7 | 160 | 6 19/64 | 9 | 23/64 | 144 | 5 9/16 | 192 | 7 9/16 | |
| 165 | 196 | 7 23/32 | 183 | 7 13/64 | 6 | 15/64 | 166 | 6 17/32 | 211 | 8 19/64 | DHD360, SD6, QL60, Mission60 |
| 180 | 219 | 8 5/8 | 194 | 7 5/8 | 6 | 15/64 | 179 | 7 3/64 | 232 | 9 1/8 | |
| 190 | 219 | 8 5/8 | 205 | 8 1/16 | 7 | 9/32 | 191 | 7 1/2 | 236 | 9 19/64 | |
| 190 | 219 | 8 5/8 | 205 | 8 1/16 | 7 | 9/32 | 191 | 7 1/2 | 236 | 9 19/64 | DHD380, QL80, SD8, Mission 80 |
| 230 | 273 | 10 3/4 | 250 | 9 27/32 | 11.5 | 29/64 | 229 | 9 1/64 | 286 | 11 1/4 | |
| 240 | 273 | 10 3/4 | 250 | 9 27/32 | 11.5 | 29/64 | 241 | 9 31/64 | 308 | 12 1/8 | |
| 280 | 324 | 12 3/4 | 305 | 12 | 9.5 | 3/8 | 280 | 11 1/64 | 378 | 14 57/64 | SD10, NUMA100 |
ODEX ECCENTRIC CASING DRILLING SYSTEM - Frequently Asked Questions (FAQ)
• Q: What types of ground is the ODEX system best suited for?
◦ A: ODEX excels in unstable overburden: loose sands, gravel, cobbles, boulders, soft clays, fill material, and fractured rock prone to collapse. It's less efficient in massive, competent bedrock where standard drilling suffices.
• Q: Can the ODEX system drill through solid rock?
◦ A: While primarily designed for overburden, the pilot bit and reamer can penetrate softer or fractured rock layers encountered within the overburden sequence. For extensive hard rock drilling, other methods might follow the cased section.
• Q: How does the casing get removed after drilling?
◦ A: The casing is typically temporary. Once the target depth is reached and the hole is stable (or permanent casing/grout is placed), the ODEX drill string is retrieved. The eccentric reamer retracts as rotation stops, allowing it to be pulled back inside the casing and withdrawn.
• Q: Is the ODEX system compatible with my existing drill rig?
◦ A: Very likely! ODEX systems are designed to work with standard top-hammer or down-the-hole (DTH) drilling rigs equipped with the appropriate drive chuck and rotation capabilities for the casing size. Adapters are commonly available.
• Q: What are the main advantages over conventional drilling and casing methods?
◦ A: The biggest advantages are speed (single-pass operation), reliability (immediate hole support prevents failure), cost savings (reduced time, labor, materials, risk), and environmental protection (minimized fluid loss & aquifer cross-contamination).
• Q: Can the system handle curved drilling?
◦ A: While primarily designed for relatively straight holes, controlled directional drilling is possible with specialized equipment and techniques, though it adds complexity compared to straight vertical applications.