Dual-Wall Drill String
AssemblyThe double-tube rods that send air down the outer annulus and return chips up the sealed inner tube. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Dual-Wall Drill String
4 top-level lines as of r141161| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Dual-Wall RC Rod | reverse-circulation-drill-rc-rod | 30× | 30 | · | part |
| 2 | Inner Sample Tube | reverse-circulation-drill-inner-tube | 30× | 30 | · | part |
| 3 | Rod Joint Seal | reverse-circulation-drill-rod-seal | 1× | 1 | · | part |
| 4 | Crossover Sub | reverse-circulation-drill-crossover | 1× | 1 | · | part |