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| Number | Title | Issue Date |
| 6296069 | Bladed drill bit with centrally distributed diamond cutters A drill bit as used in particular in the oil well drilling field comprising a central body (2), cutting blades (3) protruding with respect to the body (2), both at the front of this body according to a drill direction and at the sides of this same body (2... | 10/02/2001 |
| 6283233 | Drilling and/or coring tool A drill and/or core tool, in particular for oil drilling and/or coring, comprising a body (2) showing a substantially cylindrical peripheral surface (3) and a front (4), blades (5) which extend from the front (4) till over the peripheral surface (3) and w... | 09/04/2001 |
| 5670717 | Method and device for detecting and/or measuring at least one geophysical parameter from a core sample Method and device for detecting and/or measuring at least one geophysical parameter from a core sample (1), in particular in the oil sector, comprising, during an operation of core drilling with a sampler (2); arranging, substantially fixed relative to th... | 09/23/1997 |
