Drag drill bit having improved arrangement of cutting elements
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United States of America Patent
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Jul 18, 1989
Issued Date -
N/A
app pub date -
Nov 7, 1988
filing date -
Mar 26, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A drag type rotary bit (10) having a plurality of arcuate blades (24A-24E) each having a row of cutting elements (36A-36G) thereon. The cutting elements (36A-36G) are arranged on the arcuate blades (24A-24E) with around one-half of the length of the arcuate blades (24A-24B) being positioned adjacent the outer periphery (20) of the bit body (12) to provide a relatively long length mounting area or the cutting elements (36D-36G) at the gage (20). Deep grooves (26) are provided adjacent each of the blades (24A-24E) and provide a relatively large passage for the outwardly flow of drilling fluid and entrained cuttings.
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