Bit for drilling wells and associated drilling method
AssigneeTotal SA
InventorsAbdelhakim Hahati, Sébastian Desmette, Benoît Deschamps, Robert Delwiche, Matthieu Naegel
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Abstract
The invention relates to a bit for drilling wells comprising:—a front face,—a plurality of radial blades (2) provided with cutting elements (3), the blades being distributed around the front face,—a space (4) for forming a core (10), the space being situated at the centre of the front face,—a cavity (5) for evacuating the core towards the periphery of the bit, the cavity being situated between two adjacent blades. The invention also relates to a method for drilling wells using the bit. The invention makes it possible to rapidly drill wells of great depth in all types of rocks without the risk of clogging.
Claims21
A bit for drilling wells comprising:
- a front face,
- a plurality of radial blades provided with cutting elements, the blades being distributed around the front face,
- a space for forming a core, the space being situated at the centre of the front face,
- a cavity for evacuating the core towards the periphery of the bit, the cavity being situated between two adjacent blades.
A bit for drilling wells comprising
- a front face,
- a plurality of radial blades provided with cutting element, the blades being distributed around the front face,
- a space for forming a core, the space being situated at the centre of the front face,
- a cavity for evacuating the core towards the periphery of the bit, the cavity being situated between two adjacent blades
- a device for breaking up the core, the device being situated in the cavity close to the centre of the bit.
(canceled)
A method for drilling wells, the method comprising:
- providing a bit for drilling wells, the bit comprising:
- a front face,
- a plurality of radial blades provided with cutting element, the blades being distributed around the front face,
- a space for forming a core, the space being situated at the centre of the front face, and
- a cavity for evacuating the core towards the periphery of the bit, the cavity being situated between two adjacent blades;
- forming a core at the centre of the bit;
- evacuating the core up through the drilling well to the ground surface;
- and
- recovering the core.
Dependencies are inferred from the claim text.