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Table T2. Contingency operations time estimates.
Operation
Time
(hours)
(days)
Total




Open hole to 500 m subbasement and install 750 m of 10.75 inch casing

Run in hole
10.50
0.44
0.44
Open hole from 9.875 to 18.5 inches
483.90
20.16
20.60
Bit change
212.92
8.87
29.47
Pull out of hole
10.50
0.44
29.91
Make up casing string
24.00
1.00
30.91
Run in hole with casing
16.00
0.67
31.58
Run casing
22.00
0.92
32.49
Cement and R/T
24.00
1.00
33.49
Drill out cement
4.00
0.17
33.66
Trip
12.00
0.50
34.16
Install new reentry cone and 20 and 16 inch casing
Jet 20 inch casing
30.60
1.3

Pull out of hole
9.70
0.4
1.7
Make up, run in hole, reenter
10.00
0.4
2.1
Open hole 20 m subbasement
52.00
2.1
4.3
Pull out of hole
10.00
0.4
4.7
Makeup 270 m of 16 inch casing
8.00
0.3
5.0
Run in hole and reenter
8.60
0.4
5.4
Land casing
9.00
0.4
5.7
Cement casing
0.25
0.0
5.8
Clear seafloor
3.50
0.1
5.9
CADA on surface
7.75
0.3
6.2
Makeup bit and RCB bottom-hole assembly
1.50
0.1
6.3
Run in hole and reenter
8.50
0.4
6.6
To top of cement
3.25
0.1
6.8
Drill out cement
4.00
0.2
6.9
Pull out of hole
9.00
0.4
7.3
Single-bit holes (100–150 m subbasement)
Run in hole
10.50
0.4
0.4
Core to bit destruction
85.00
3.5
3.9
Drop bit, log
24.00
1.0
4.9
Multi-bit holes (200–300 m subbasement)
Run in hole
10.50
0.4
0.4
Core to 50 hours on bit
65.00
2.7
3.1
Drop free-fall funnel; pull out of hole
10.00
0.4
3.5
Run in hole
10.50
0.4
3.9
Core to bit destruction
85.00
3.5
7.4
Drop bit, log
36.00
1.5
8.9
Log Hole 504B
Transit to Hole 504B
60.00
2.5
2.5
Run in hole
10.00
0.4
2.9
Water Sampling Temperature Probe
4.00
0.2
3.1
Triple combo, Formation MicroScanner-sonic, Ultrasonic Borehole Imager, GBM magnetometer, Well Seismic Tool
108.00
4.5
7.6
Deepen Hole 896A
Run in hole
10.00
0.4
0.4
Water Sampling Temperature Probe
4.00
0.2
0.6
Core to 50 hours on bit
65.00
2.7
3.7
Logging
108.00
4.5
8.2

Note: Add 3.7 days and 100 m penetration per bit run.

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