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US 11,655,681 B2Granted
Inner cutter for drilling
AssigneeHalliburton Energy Services, Inc.
InventorWilliam Brian Atkins
Life of this patent
Estimating the term…
Abstract
A drill bit includes a bit body defining a bit rotational axis and a blade attached to the bit body. The apparatus also includes a cutter comprising a cutting arc on a cutting surface of the cutter, wherein the cutter comprises at least one relief comprising a straight edge and a curved edge having an end that interrupts the cutting arc.
Claims17
A drill bit comprising:
- a bit body defining a bit rotational axis;
- a blade attached to the bit body;
- and
- a cutter comprising a cutting arc on a cutting surface of the cutter, wherein the cutter comprises at least one relief comprising
- a first curved edge deviating from an outer edge of the cutter;
- a straight edge coupled with the first curved edge, the straight edge configured to generate one or more micro cores,
- a second curved edge coupled with the straight edge and having an end that interrupts the cutting arc, the second curved edge configured to fracture the one or more micro cores via side load forces of the drill bit exerted on the one or more micro cores;
- and
- a third curved edge curving into the outer edge of the cutter and coupled to the second curved edge.
6 more elements
A method comprising:
- generating, via operation of a drill bit, one or more micro cores as part of a drilling process used to extend a borehole into a foundation material, wherein the drill bit comprises a bit body defining a bit rotational axis, a blade attached to the bit body, and a cutter comprising a cutting arc on a cutting surface of the cutter, wherein the cutter comprises at least one relief comprising a first curved edge deviating from an outer edge of the cutter, a straight edge coupled with the first curved edge, the straight edge configured to generate the one or more micro cores, a second curved edge coupled with the straight edge and having an end that interrupts the cutting arc, the second curved edge configured to fracture the one or more micro cores via side load forces of the drill bit exerted on the one or more micro cores, and a third curved edge curving into the outer edge of the cutter and coupled to the second curved edge.
A cutter comprising:
- a cutting surface;
- a cutting arc;
- and
- at least one relief having an end that interrupts the cutting arc, wherein the at least one relief comprises
- a first curved edge deviating from an outer edge of the cutter;
- a straight edge coupled with the first curved edge, the straight edge configured to generate one or more micro cores
- a second curved edge coupled with the straight edge and having an end that interrupts the cutting arc, the second curved edge configured to fracture the one or more micro cores via side load forces of the drill bit exerted on the one or more micro cores;
- and
- a third curved edge curving into the outer edge of the cutter and coupled to the second curved edge.
6 more elements
Dependencies are inferred from the claim text.