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US 10,871,037 B2Granted
Mechanical locking of ovoid cutting element with carbide matrix
AssigneeSmith International, Inc.
InventorsRyan Worth Eldredge, Gregory Caron, Jeffrey Bruce Lund
Life of this patent
Estimating the term…
Abstract
A cutting assembly for use in a drill bit has an ovoid insert including an ultrahard material. The ovoid insert is cast in a matrix such that the matrix surrounds at least part of the ovoid insert, limiting movement of the ovoid insert. Material is removed from the top surface and sidewall of the cutting assembly to produce a cutting edge.
Claims13
A cutting assembly for use in a drill bit comprising:
- a matrix including a matrix material;
- an insert embedded in the matrix, the insert including an ultrahard material, the insert having an ovoid contact surface, the matrix encapsulating the insert by at least 50% in at least one axis to restrain the insert in the matrix, wherein the matrix is positioned proximate the insert at the ovoid contact surface;
- a front surface, the insert and the matrix being exposed on the front surface, an insert front surface being curved in a first direction along the front surface and straight in a second direction along the front surface;
- and
- a top surface, a first end surface of the insert being exposed on the top surface and the matrix being exposed on the top surface, the first end surface on the top surface being planar, wherein a width of the insert increases from the top surface into the matrix along the at least one axis.
2 more elements
A method of manufacturing a cutting assembly for use in a drill bit, the method comprising:
- providing an ovoid insert including an ultrahard material;
- casting the ovoid insert into a matrix substantially encapsulating at least a portion of the ovoid insert;
- grinding a top surface of the ovoid insert and the matrix;
- and
- grinding a sidewall of the ovoid insert and the matrix.
2 more elements
Dependencies are inferred from the claim text.