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US 6,604,588 B2Granted
Gage trimmers and bit incorporating the same
AssigneeSmith International, Inc.
InventorsRonald K. Eyre, Stewart Middlemiss, Lynn L. Belnap
Life of this patent
Estimating the term…
Abstract
A gage trimmer and a bit incorporating such a gage trimmer are provided. The gage trimmer has an ultra hard material layer having a circumferential surface including a cylindrical portion and a flat surface for bearing against a circumferential wall of a hole drilled by the bit. The ultra hard material layer is formed over a substrate interface surface. The flat surface does not extend to the interface surface.
Claims24
A bit comprising:
- a gage row cavity;
- and
- a gage trimmer fitted in the gage row cavity and comprising,
- a body having a central longitudinal axis, a base and an end face, the body having a circumferential surface comprising a generally cylindrical portion and a relatively flat portion formed along a first plane,
- a depression formed on the end face extending to said first plane, and
- an ultra hard material layer formed over the end face having a circumferential surface comprising a generally cylindrical portion, a relatively first flat portion formed along the first plane and a second relative flat portion extending from the first portion and formed along a second plane, wherein the first plane is inclined toward a diameter of the body in a direction away from the base and toward the end face at a first angle relative to a third plane parallel to a fourth plane aligned with said central longitudinal axis, and wherein the second plane is inclined relative to the first plane at a second angle relative to the third plane greater than the first angle.
3 more elements
A bit comprising:
- a gage row cavity;
- a gage trimmer fitted in the gage row cavity and comprising,
- a body having a central longitudinal axis, a base and an end face, the body having a circumferential surface comprising a generally cylindrical portion and a relatively flat portion formed along a first plane,
- a depression formed on the end face extending to said first plane, and
- an ultra hard material layer formed over the end face having a circumferential surface comprising a generally cylindrical portion and a relatively flat portion for bearing against a circumferential wall of a hole drilled by said bit.
2 more elements
A gage trimmer comprising:
- a body having a central longitudinal axis, a base and an end face, the body having a circumferential surface comprising a generally cylindrical portion and a relatively flat portion formed along a first plane;
- a depression formed on the end face extending to said first plane;
- and
- an ultra hard material layer formed over the end face having a circumferential surface comprising a generally cylindrical portion, a relatively first flat portion formed along the first plane and a second relative flat portion extending from the first portion and formed along a second plane, wherein the first plane is inclined toward a diameter of the body in a direction away from the base and toward the end face at a first angle relative to a third plane parallel to a fourth plane aligned with said central longitudinal axis, and wherein the second plane is inclined relative to the first plane at a second angle relative to the third plane greater than the first angle.
1 more element
A gage trimmer comprising:
- a body having a central longitudinal axis, a base and an end face, the body having a circumferential surface comprising a generally cylindrical portion and a relatively flat portion formed along a first plane;
- a depression formed on the end face extending to said first plane;
- and
- an ultra hard material layer formed over the end face having a circumferential surface comprising a generally cylindrical portion and a relatively flat portion.
1 more element
Dependencies are inferred from the claim text.