Wear of bit indicator
United States Patent 2669871
US Patent References:
Automatic feed for rotary well drills
- - 2298222
Direct reading rate-of-penetration meter
- - 2330753
Apparatus for drilling rate logging
- - 2365014
Drill bit pressure gauge
- - 2422806
Automatic feed for rotary well drills
- - 2298222
Direct reading rate-of-penetration meter
- - 2330753
Apparatus for drilling rate logging
- - 2365014
Drill bit pressure gauge
- - 2422806
Inventors:
Arthur, Lubinski
Publication Date:
02/23/1954
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Export Citation:
Assignee:
Arthur, Lubinski
Primary Class:
Other Classes:
702/34, 703/3, 703/7, 173/20, 73/152.490
International Classes:
E21B12/02; E21B44/00; E21B12/00