Diamond drill bit with varied cutting elements
Number of patents in Portfolio can not be more than 2000
United States of America
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-
Dec 3, 1991
Grant Date -
N/A
app pub date -
Feb 23, 1990
filing date -
Jun 7, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An earth boring bit utilizing thermally stable polycrystalline diamond material having a row of closely spaced sharp cutting elements, following by a row of widely spaced, blunt or rounded cutting elements, each cutting element extending from a supporting matrix a predetermined amount to allow the sharp cutting elements to form small relief kerfs in a geological formation, after which the blunt or rounded cutting elements dislodge material between the kerfs. Additionally, cylindrical cutting elements are positioned near the gage or outermost portion of the matrix to enhance gage bore cutting.
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