US 12,385,324 B2
Two-stage drill bit
J. Daniel Belnap, Lindon, UT (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Nov. 3, 2023, as Appl. No. 18/501,520.
Prior Publication US 2025/0146365 A1, May 8, 2025
Int. Cl. E21B 10/43 (2006.01); E21B 10/08 (2006.01); E21B 10/62 (2006.01)
CPC E21B 10/43 (2013.01) [E21B 10/08 (2013.01); E21B 10/62 (2013.01)] 20 Claims
OG exemplary drawing
 
20. 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.