Diamond Core Reference Guide

Diamond Core Reference Guide

Diamond Core Reference Guide

 

SIZE BIT O.D. 
HOLE DIAMETER*
BIT I.D. 
CORE DIAMETER*
BOREHOLE
VOLUME*
IN. MM IN. MM GAL/FT L/M
AWL 1.890 48.0 1.062 27.0 .15 1.81
BWL 2.360 60.0 1.433 36.4 .23 2.83
NWL 2.980 75.82 1.875 47.6 .36 4.50
N2WL 2.980 75.7 1.995 50.6 .36 4.50
N3WL 2.980 75.7 1.775 45.0 .36 4.50
NWD4 2.980 75.7 2.060 51.3 .36 4.50
HWL 3.782 96.0 2.500 63.5 .60 7.30
H3WL 3.782 96.0 2.406 61.1 .60 7.30
HWD4 3.650 92.7 2.400 61.0 .58 7.20
PWL 4.827 122.6 3.345 85.0 .95 11.80
P3WL 4.827 122.6 3.270 83.0 .95 11.80

*Values are nominal reaming shell gauge.

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