The Microcore bit (MCB) is the latest DDS drill bit technology innovation, resulting from extended R&D program led in collaboration with TOTAL R&D departement (Licence agreement).
The Microcore bit allows the generation of a micro-core of the formation being drilled in the center area of the bit, where the cutting structure is interrupted. This process occurs continuously as drilling progresses.
1. While drilling, the micro-core advances to its nominal size and reaches a PDC stop.
2. A lateral forces is then applied on the micro-core, inducing the failure.
3. The micro-core is led to the annulus via an evacuation area. This area is a larger and deeper slot between the 2 front blades. This evacuation area always remains open, preventing any risk of bit plugging.
By comparison to conventional drill bits and thanks to its specific design, the MCB brings :
1. Drilling performance improvement
2. High quality formation sample for formation evaluation.
MCB is available in all sizes, PDC, Dual and impregnated technologies.