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doi:10.2204/iodp.pr.312.2006

Table T5. Summary of coring bits used on Expedition 309.

Bit
Manufacturer
Serial number
Bit type
Size
Number of cores
Interval cored (m)
Recovered (m)
Recovery (%)
Coring time (h)
Rate of penetration (m/h)
Log bit



Logging
43.8
1256D-1
RBI
BF-739
CC-9
9-7/8
 		11
69.1
25.20
36.5
51.7
1.34
1256D-2
RBI
BF-852
CC-9
9-7/8
 		11
76.8
18.02
23.5
52.1
1.47
1256D-3
RBI
BF-854
CC-9
9-7/8
 		11
61.1
14.85
24.3
52.8
1.16
1256D-4
RBI
BF-856
CC-9
9-7/8
 		4
20.4
9.52
46.7
17.8
1.14
1256D-5
RBI
BF-858
CC-9
9-7/8
 		15
72.1
20.56
28.5
50.1
1.44
1256D-6
RBI
BF-741
CC-9
9-7/8
 		12
57.6
21.45
37.2
50.8
1.13
1256D-7
RBI
BF-742
CC-9
9-7/8
 		8
36.3
17.70
48.8
42.5
0.85
1256D-8
RBI
BF-853
CC-9
9-7/8
 		12
58.6
17.74
30.3
57.8
1.01
1256D-9
RBI
CL-540
CC-9
9-7/8
 		12
51.3
37.57
73.2
53.1
0.97
Log bit



Logging
76.0
Totals:
96
503.3
182.61
1.17

Note: RBI = Rock Bit International.

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