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US 12,385,324 B2Granted
Two-stage drill bit
AssigneeSchlumberger Technology Corporation
InventorJ. Daniel Belnap
Life of this patent
Estimating the term…
Abstract
A device may include a bit body with a rotational axis in a longitudinal direction. A device may include at least one blade coupled to the bit body with an outward surface. A device may include a rolling cutting element positioned on the outward surface. A device may include a fixed cutting element positioned with a fixed cutting profile at least partially rotationally overlapping with a rolling cutting profile of the rolling cutting element.
Claims20
A drill bit comprising:
- a bit body with a rotational axis in a longitudinal direction;
- at least one blade coupled to the bit body with an outward surface;
- a rolling cutting element positioned on the outward surface, the rolling cutting element including ridges separated by a trough in an axial direction of a cutting element axis of the rolling cutting element;
- and
- a fixed cutting element positioned with a fixed cutting profile at least partially rotationally overlapping with a rolling cutting profile of the rolling cutting element.
2 more elements
A drill bit comprising:
- a bit body with a rotational axis in a longitudinal direction;
- a first blade coupled to the bit body with a first outward surface;
- a first rolling cutting element having a cutting element axis in plane with a first radial plane of the rotational axis positioned on the first outward surface, the first rolling cutting element including ridges separated by a trough in an axial direction of the cutting element axis of the first rolling cutting element;
- a first fixed cutting element positioned with a first fixed cutting profile at least partially rotationally overlapping with a first rolling cutting profile of the first rolling cutting element;
- a second blade coupled to the bit body with a second outward surface;
- a second rolling cutting element having a cutting element axis in plane with a second radial plane of the rotational axis positioned on the second outward surface, the second rolling cutting element including ridges separated by a trough in an axial direction of the cutting element axis of the second rolling cutting element;
- and
- a second fixed cutting element positioned with a second fixed cutting profile at least partially rotationally overlapping with a second rolling cutting profile of the second rolling cutting element,
- wherein the first rolling cutting profile rotationally overlaps the second rolling cutting profile.
6 more elements
A drill bit comprising:
- a bit body with a rotational axis in a longitudinal direction;
- a first blade coupled to the bit body with a first outward surface;
- a second blade coupled to the bit body with a second outward surface;
- a third blade coupled to the bit body with a third outward surface;
- a first rolling cutting element having a cutting element axis in plane with a first radial plane of the rotational axis positioned on the first outward surface, the first rolling cutting element including ridges separated by a trough in an axial direction of the cutting element axis of the first rolling cutting element;
- a first fixed cutting element positioned with a first fixed cutting profile at least partially rotationally overlapping with a first rolling cutting profile of the first rolling cutting element, the first fixed cutting element positioned on the second outward surface;
- a second rolling cutting element having a cutting element axis in plane with a second radial plane of the rotational axis positioned on the second outward surface, the second rolling cutting element including ridges separated by a trough in an axial direction of the cutting element axis of the second rolling cutting element;
- and
- a second fixed cutting element positioned with a second fixed cutting profile at least partially rotationally overlapping with a second rolling cutting profile of the second rolling cutting element, the second fixed cutting element positioned on the third outward surface,
- wherein the first rolling cutting profile rotationally overlaps the second rolling cutting profile.
7 more elements
Dependencies are inferred from the claim text.