Table T1. Expedition 343 operations schedule.
| Task
|
Depth
(mbsf) |
Section
length (m) |
Daily progress
(m/day) |
Days
|
Subtotal
(days) |
Total
(days) |
|---|---|---|---|---|---|---|
| Transit | ||||||
| Transit from Shimizu to the site. | 3.00 | 3.00 | 3.00 | |||
| Set guide base | ||||||
| Prepare for spud, free fall UWTV cable to 7000 m. | ||||||
| Deploy transponders, DP calibration. | ||||||
| Make up drill pipe and rack back in derrick. | ||||||
| Prepare and set guide base. | 3.00 | 5.50 | 8.50 | |||
| Run guide base and set on the seabed w/UWTV. | ||||||
| Recover UWTV; POOH running tool. | ||||||
| LWD pilot hole to 900 mbsf | ||||||
| Make up and run LWD BHA w/UWTV. | 2.00 | 2.00 | ||||
| Tag seabed and recover UWTV prior to starting drilling. | ||||||
| Drill 8-1/2 inch LWD hole from 0 to 800 mbsf. | 740 | 740 | 300 | 2.50 | 4.50 | |
| Wiper trip, bit change. | 3.00 | 7.50 | ||||
| Drill 8-1/2 inch LWD hole from 800 to 900 mbsf. | 840 | 100 | 100 | 1.00 | 8.50 | |
| Wiper trip, POOH, rig down BHA. | 1.50 | 10.00 | 18.50 | |||
| Run casing and completion assembly | ||||||
| Run 4.5 inch tubing to 900 m w/MTL assembly. | 4.00 | 4.00 | 22.50 | |||
| Run UWTV, enter guide base and recover UWTV. | ||||||
| RIH to 900 mbsf, recover casing running tool. | ||||||
| Set guide base | ||||||
| Prepare and set guide base. | 3.00 | 3.00 | 25.50 | |||
| Run guide base and set on the seabed w/UWTV. | ||||||
| Recover UWTV; POOH running tool. | ||||||
| RCB core 500–900 mbsf | ||||||
| Prepare | 0.50 | 0.50 | ||||
| Rig up RCB BHA. | ||||||
| Make up and run RCB coring BHA w/UWTV. | 2.00 | 2.50 | ||||
| Enter guide base and recover UWTV prior to start coring. | ||||||
| Drill down w/center bit to 500 mbsf. | 500 | 500 | 250 | 2.00 | 4.50 | |
| Cut core from 500 to 800 mbsf. | 740 | 240 | 40 | 6.00 | 10.50 | |
| Wiper trip, bit change. | 3.00 | 13.50 | ||||
| Cut core from 800 to 900 mbsf. | 840 | 100 | 35 | 3.00 | 16.50 | |
| Spot kill mud; POOH, rig down BHA. | 1.50 | 18.00 | 43.50 | |||
| Run casing and completion assembly | ||||||
| Run 3.5 inch tubing 900 m w/completion assembly. | 6.00 | 6.00 | ||||
| Run UWTV, enter guide base and recover UWTV. | ||||||
| RIH to 900 mbsf, recover casing running tool. | ||||||
| Recover transponders. | 1.50 | 7.50 | 51.00 | |||
| Transit | ||||||
| Transit from the site to port. | 3.00 | 3.00 | 54.00 | |||
|
Total: |
54.00 | |||||
Water depth = 6910 m. UWTV = underwater television. DP = dynamic positioning. POOH = pull out of hole. LWD = logging while drilling, BHA = bottom-hole assembly, MTL = miniature temperature logger, RCB = rotary core barrel. RIH = run in hole.