Surface geometry for non-planar drill inserts
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United States of America Patent
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Mar 6, 2001
Grant Date -
N/A
app pub date -
Nov 28, 1997
filing date -
Nov 28, 1997
priority date (Note) -
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Abstract
A cutting element insert is provided for use with drills used in the drilling and boring through of subterranean formations. This new insert has a modified diamond surface shape having ridges, facets and/or other discontinuities on the cutting surface topography, formed on or about an otherwise non-planar shape, such as spherical, hemispherical, conical or the like. This modified diamond layer shape provides increased cutting stress at the diamond/rock interface, thereby causing the rock to fail with less over all drilling energy being required, while simultaneously introducing little additional stresses to the cutter or insert.
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