Rolling blade PDC bit
AssigneeSaudi Arabian Oil Company
InventorsEyas M. Kutbi, Hamza Fethiza Tedjani
Life of this patent
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Abstract
A drill bit for forming a wellbore through a geologic formation includes a connector configured for connection to a drill string and a bit body coupled to the connector. A fixed cutting element is mounted on the bit body for rotation with the bit body and a slot extends through the bit body. A rolling cutting blade is supported in the slot such that an exposed segment of the cutting blade protrudes from slot and concealed segments of the rolling cutting blade adjacent the exposed segment are disposed within the slot. The rolling cutting blade rotates to thereby conceal the exposed segment and expose the concealed segments. A plurality of rotating cutting elements are supported on a periphery of the rolling cutting blade.
Claims18
A drill bit for forming a wellbore through a geologic formation, the drill bit comprising:
- a bit body defining a bit body rotational axis extending longitudinally therethrough;
- a fixed cutting element mounted on the bit body for rotation with the bit body about the bit body rotational axis;
- a slot defined in the bit body and extending entirely therethrough from a first lateral side that extends radially outward relative to the bit body rotational axis to a second lateral side that extends radially outward relative to the bit body rotational axis and opposite the first lateral side of the bit body;
- a rolling cutting blade rotatably supported in the slot such that an exposed segment of the rolling cutting blade protrudes from the slot and concealed segments of the rolling cutting blade adjacent the exposed segment are disposed within the slot, the rolling cutting blade being supported to rotate about a blade rotational axis to thereby conceal the exposed segment and expose the concealed segments;
- and
- a plurality of rotating cutting elements supported on a periphery of the rolling cutting blade.
A downhole drilling system, comprising:
- a drill string extending into a wellbore penetrating a geologic formation;
- a drill bit coupled to the drill string and providing a bit body that defines a bit body rotational axis extending longitudinally therethrough;
- a slot defined in the bit body and extending entirely therethrough from a first lateral side that extends radially outward relative to the bit body rotational axis to a second lateral side that extends radially outward relative to the bit body rotational axis and opposite the first lateral side of the bit body;
- a rolling cutting blade supported in the slot such that an exposed segment of the rolling cutting blade protrudes from the slot and concealed segments of the rolling cutting blade adjacent the exposed segment are disposed within the slot, the rolling cutting blade supported to rotate about a blade rotational axis to thereby conceal the exposed segment and expose the concealed segments;
- and
- a plurality of rotating cutting elements supported on a periphery of the rolling cutting blade.
Dependencies are inferred from the claim text.