Table T3. Summary of APC overdrilling.
|
Depth of first excess force (mbsf)
|
Maximum APC penetration (mbsf)
|
Added APC penetration by overdrilling (%)
|
Reason for APC termination
|
Number of overdrilled APC barrels
|
|
|
|
|
1232A
|
103
|
112.5
|
9
|
|
2
|
12
|
27
|
371.3
|
1232B
|
|
|
|
|
|
10
|
|
90.1
|
1232C
|
|
|
|
|
|
4
|
|
33.2
|
1233A
|
|
|
|
|
|
1
|
|
12.0
|
1233B
|
|
|
|
|
|
11
|
|
109.5
|
1233C
|
|
|
|
|
|
13
|
|
116.3
|
1233D
|
|
|
|
|
|
13
|
|
112.3
|
1233E
|
|
|
|
|
|
8
|
|
101.5
|
1234A
|
|
|
|
|
|
11
|
11
|
205.2
|
1234B
|
|
|
|
|
|
10
|
9
|
182.4
|
1234C
|
|
|
|
|
|
8
|
|
79.1
|
1235A
|
|
|
|
|
|
20
|
|
181.3
|
1235B
|
|
|
|
|
|
19
|
|
176.2
|
1235C
|
|
|
|
|
|
16
|
|
152.5
|
1236A
|
|
|
|
|
|
20
|
4
|
207.7
|
1236B
|
|
|
|
|
|
13
|
|
122.8
|
1236C
|
154.8
|
167.3
|
8
|
|
1
|
18
|
|
167.3
|
1237A
|
|
|
|
|
|
1
|
|
10.5
|
1237B
|
148
|
317.4
|
114
|
|
16
|
34
|
|
317.4
|
1237C
|
163.3
|
315.3
|
93
|
|
15
|
33
|
|
315.3
|
1237D
|
234
|
253
|
8
|
|
3
|
11
|
|
253.0
|
1238A
|
90.5
|
204.5
|
126
|
|
10
|
22
|
24
|
430.6
|
1238B
|
87
|
201
|
131
|
|
8
|
21
|
|
201.0
|
1238C
|
139
|
167.5
|
21
|
|
3
|
18
|
|
167.5
|
1239A
|
88.9
|
174.4
|
96
|
|
6
|
19
|
36
|
515.4
|
1239B
|
152.3
|
171.3
|
12
|
|
3
|
18
|
24
|
398.7
|
1239C
|
|
|
|
|
|
12
|
|
117.3
|
1240A
|
174.5
|
253
|
45
|
|
6
|
28
|
|
253.0
|
1240B
|
162.7
|
248.2
|
53
|
|
8
|
26
|
|
248.2
|
1240C
|
|
|
|
|
|
8
|
|
80.2
|
1240D
|
|
|
|
|
|
3
|
|
31.7
|
1241A
|
184.4
|
314.2
|
70
|
|
13
|
34
|
9
|
394.4
|
1241B
|
200.4
|
259.4
|
29
|
|
7
|
27
|
5
|
395.0
|
1241C
|
|
|
|
|
|
11
|
|
143.5
|
1242A
|
|
|
|
|
|
19
|
8
|
250.8
|
1242B
|
|
|
|
|
|
18
|
9
|
256.0
|
1242C
|
|
|
|
|
|
18
|
|
172.0
|
1242D
|
|
|
|
|
|
8
|
|
91.5
|
Average* (%):
|
|
|
77
|
|
|
|
|
|
|
Notes: APC = advanced hydraulic piston corer. Reason for APC termination: A1 = Pollution Prevention and Safety Panel approved depth is reached, A2 = mission accomplished, B1 = incomplete stroke is indicated, B2 = excessive pull out force >100 klb, C = mechanical. * = average from holes with APC refusal.
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