Table T3. Expedition 335 operation summary.
|
Operation |
Start |
Expedition (from departure time) |
Comments |
||||
|---|---|---|---|---|---|---|---|
|
Local time (h) |
Date (2011) |
Duration |
Time (cumulative) |
||||
|
h |
day |
h |
day |
||||
| In Puntarenas, Costa Rica, for port call activities. | 14 Apr |
|
|
|
|
Beginning of Expedition 335. | |
| Depart Puntarenas; transit to Site 1256. | 430 | 17 Apr |
44.75 |
1.86 |
44.75 |
1.86 |
11.3 kt at 0630 h on 18 April. |
| On position over Hole 1256D. Pick up mouse hole, make up BHA with tricone bit and MBR. RIH drill string to 2733 mbrf while measuring and rabbiting all tubulars. | 115 | 19 Apr |
9.00 |
0.38 |
53.75 |
2.24 |
Start Run 1: Smith 9-7/8 inch F9 tricone bit. |
| Launch VIT. | 1015 | 19 Apr |
0.75 |
0.03 |
54.50 |
2.27 |
|
| RIH drill string 2733–3246 mbrf. | 1100 | 19 Apr |
1.25 |
0.05 |
55.75 |
2.32 |
|
| Lose VIT signal; retrieve VIT and repair cable head; redeploy VIT. | 1215 | 19 Apr |
3.25 |
0.14 |
59.00 |
2.46 |
|
| RIH drill string 3246–3637 mbrf. | 1530 | 19 Apr |
2.00 |
0.08 |
61.00 |
2.54 |
|
| Search and position vessel for reentry; reenter Hole 1256D at 1800 h. | 1730 | 19 Apr |
0.50 |
0.02 |
61.50 |
2.56 |
Reentry 1. |
| Continue RIH to 258.8 mbsf. | 1800 | 19 Apr |
1.25 |
0.05 |
62.75 |
2.61 |
|
| Recover VIT. | 1915 | 19 Apr |
0.75 |
0.03 |
63.50 |
2.65 |
|
| Continue RIH with 5-1/2 inch DP to 925.0 mbsf, where formation took 25,000 lb. Cancel temperature log and water sample. | 2000 | 19 Apr |
1.75 |
0.07 |
65.25 |
2.72 |
|
| Pull back in hole 925.0–891.9 mbsf. | 2145 | 19 Apr |
0.25 |
0.01 |
65.50 |
2.73 |
Obstruction. |
| Pick up 20 ft knobby and top drive. | 2200 | 19 Apr |
0.75 |
0.03 |
66.25 |
2.76 |
|
| RIH with top drive to 920.0 mbsf. | 2245 | 19 Apr |
0.75 |
0.03 |
67.00 |
2.79 |
|
| Work pipe at 920–925 mbsf, where we had hole problems during Exp. 312. Erratic torque; top drive current = 500 A. | 2330 | 19 Apr |
1.75 |
0.07 |
68.75 |
2.86 |
|
| Pull back 920–891.5 mbsf. | 115 | 20 Apr |
0.25 |
0.01 |
69.00 |
2.88 |
|
| Change out swivel packing. | 130 | 20 Apr |
1.25 |
0.05 |
70.25 |
2.93 |
|
| Resume washing/reaming 891.5–923.3 mbsf. Work stuck pipe 0415–0515 h when rotation lost. Unable to apply >10,000 lb WOB without stalling top drive. Circulate 600 bbl of hi-vis gel during 24 h period. Unable to penetrate deeper than 923.3 mbsf. Pump 150 bbl sweep at 923.3 mbsf. Trip drill string to change to a tricone bit with a more aggressive cutting structure. | 245 | 20 Apr |
27.25 |
1.14 |
97.50 |
4.06 |
|
| POOH with top drive 923.3–833.9 mbsf. | 600 | 21 Apr |
0.75 |
0.03 |
98.25 |
4.09 |
|
| Rack top drive. | 645 | 21 Apr |
0.50 |
0.02 |
98.75 |
4.11 |
|
| POOH from 833.9 mbsf and clear seafloor at 0900 h. Rack 4 stands of DC in derrick. Lay out BHA with MBR. Bit clears rotary table at 1550 h. | 715 | 21 Apr |
8.50 |
0.35 |
107.25 |
4.47 |
Clear seafloor at 0900 h. End Run 1 at 1550 h. |
| Make up new Reed 9-7/8 inch tricone bit, bit sub with float valve, and tandem set of boot baskets; RIH DP to 2877 mbrf. | 1545 | 21 Apr |
6.75 |
0.28 |
114.00 |
4.75 |
Start Run 2: Reed 9-7/8 inch tricone bit (IADC Type 517) plus boot baskets. |
| Deploy VIT. | 2230 | 21 Apr |
0.75 |
0.03 |
114.75 |
4.78 |
|
| Resume RIH drill string to 3638 mbrf. | 2315 | 21 Apr |
1.50 |
0.06 |
116.25 |
4.84 |
|
| Position vessel and reenter Hole 1256D at 0105 h. | 045 | 22 Apr |
0.50 |
0.02 |
116.75 |
4.86 |
Reentry 2. |
| RIH to 259.3 mbsf. | 115 | 22 Apr |
0.25 |
0.01 |
117.00 |
4.88 |
|
| Retrieve and recover VIT. | 130 | 22 Apr |
1.00 |
0.04 |
118.00 |
4.92 |
|
| Resume RIH 259.3–892.1 mbsf. | 230 | 22 Apr |
1.75 |
0.07 |
119.75 |
4.99 |
|
| Pick up top drive. | 415 | 22 Apr |
0.50 |
0.02 |
120.25 |
5.01 |
|
| Wash/ream hole from 892.1 mbsf. Attempt to pass bridge at ~920 mbsf. Pump 50 bbl hi-vis mud sweep. | 445 | 22 Apr |
1.75 |
0.07 |
122.00 |
5.08 |
|
| Work stuck pipe. | 630 | 22 Apr |
1.25 |
0.05 |
123.25 |
5.14 |
Stuck. |
| Wash/ream hole from ~920 mbsf. Circulate 100 bbl hi-vis mud sweep. | 745 | 22 Apr |
2.25 |
0.09 |
125.50 |
5.23 |
|
| Work stuck pipe. | 1000 | 22 Apr |
2.00 |
0.08 |
127.50 |
5.31 |
Stuck. |
| Wash/ream hole from ~923 mbsf. Unable to pass bridge. | 1200 | 22 Apr |
9.00 |
0.38 |
136.50 |
5.69 |
|
| Pull back in hole 923–863.3 mbsf. | 2100 | 22 Apr |
0.50 |
0.02 |
137.00 |
5.71 |
|
| Rack top drive. | 2130 | 22 Apr |
0.50 |
0.02 |
137.50 |
5.73 |
|
| POOH drill string and clear seafloor at 0005 h and plane of the rotary table at 0605 h. | 2200 | 22 Apr |
8.00 |
0.33 |
145.50 |
6.06 |
Clear seafloor at 0500 h. End Run 2 at 0605 h. |
| Lay out junk baskets and 9-7/8 inch bit. Junk baskets yielded some basaltic cuttings ranging from small gravel to rounded pebbles. Expedition 312 logs indicate a large washed-out zone at ~920–935 mbsf, which we will attempt to stabilize with a 5 bbl cement plug. | 600 | 23 Apr |
1.00 |
0.04 |
146.50 |
6.10 |
Samples Run02-EXJB. Decision to cement. |
| Make up cementing BHA with used Reed tricone bit without jets and 2 stands of DC. Deploy to 2676 mbrf. | 700 | 23 Apr |
6.00 |
0.25 |
152.50 |
6.35 |
Start Run 3: Reed tricone without jets. |
| Install VIT. | 1300 | 23 Apr |
0.50 |
0.02 |
153.00 |
6.37 |
|
| Resume RIH 2676–3638 mbrf. | 1330 | 23 Apr |
1.50 |
0.06 |
154.50 |
6.44 |
|
| Search and position vessel. Reenter Hole 1256D at 1520 h. | 1500 | 23 Apr |
0.25 |
0.01 |
154.75 |
6.45 |
Reentry 3. |
| RIH drill string to 262.9 mbsf. | 1515 | 23 Apr |
0.50 |
0.02 |
155.25 |
6.47 |
|
| POOH VIT and recover. | 1545 | 23 Apr |
1.50 |
0.06 |
156.75 |
6.53 |
|
| Resume RIH drill string. Tag bridge at 922 mbsf. | 1715 | 23 Apr |
1.50 |
0.06 |
158.25 |
6.59 |
|
| Make up circulating head and Lo-torque valves; pressure test to 1500 psi. | 1845 | 23 Apr |
0.50 |
0.02 |
158.75 |
6.61 |
|
| Pump 5 bbl of 16 ppg cement slurry. | 1915 | 23 Apr |
0.25 |
0.01 |
159.00 |
6.62 |
Pump cement. |
| Displace drill string with seawater (1× volume). | 1930 | 23 Apr |
0.50 |
0.02 |
159.50 |
6.65 |
|
| Lay out circulating head and pull back in hole with drill string to 806.9 mbsf. | 2000 | 23 Apr |
0.50 |
0.02 |
160.00 |
6.67 |
|
| Flush drill string with seawater (3× volume). | 2030 | 23 Apr |
1.25 |
0.05 |
161.25 |
6.72 |
|
| Lay out circulating head and POOH to 3191 mbrf. Clear top of the cone at 2320 h. Bit at rotary table at 0515 h. | 2145 | 23 Apr |
7.50 |
0.31 |
168.75 |
7.03 |
Clear seafloor at 2320 h. End Run 3 at 0515 h. |
| Make up new 9-7/8 inch Atlas tricone bit, inspect float, pick up 2 DC stands from derrick, and install piccolo at 199 mbrf. | 515 | 24 Apr |
1.50 |
0.06 |
170.25 |
7.09 |
Start Run 4: 9-7/8 inch tricone bit (Atlas HP61). |
| Service rig. | 645 | 24 Apr |
0.50 |
0.02 |
170.75 |
7.11 |
|
| Resume tripping drill string 199–1596 mbrf. | 715 | 24 Apr |
3.25 |
0.14 |
174.00 |
7.25 |
|
| Slip and cut 115 ft of drilling line. | 1030 | 24 Apr |
1.50 |
0.06 |
175.50 |
7.31 |
|
| Resume tripping drill string 1596–2731 mbrf. | 1200 | 24 Apr |
2.50 |
0.10 |
178.00 |
7.42 |
|
| Deploy VIT. | 1430 | 24 Apr |
0.50 |
0.02 |
178.50 |
7.44 |
|
| Continue RIH DP 2731–3636 mbrf. | 1500 | 24 Apr |
1.75 |
0.07 |
180.25 |
7.51 |
|
| Search and position vessel. Reenter Hole 1256D at 1655 h. | 1645 | 24 Apr |
0.25 |
0.01 |
180.50 |
7.52 |
Reentry 4. |
| Continue RIH drill string to 315.7 mbsf. | 1700 | 24 Apr |
0.50 |
0.02 |
181.00 |
7.54 |
|
| Recover VIT. | 1730 | 24 Apr |
0.75 |
0.03 |
181.75 |
7.57 |
|
| Continue RIH DP and tag bridge at 922 mbsf. | 1815 | 24 Apr |
1.25 |
0.05 |
183.00 |
7.62 |
|
| Pull back in hole to 890.6 mbsf. | 1930 | 24 Apr |
0.25 |
0.01 |
183.25 |
7.64 |
|
| Pick up top drive and RIH with same to 922.0 mbsf. | 1945 | 24 Apr |
1.00 |
0.04 |
184.25 |
7.68 |
|
| Attempt to wash/ream though bridge encountering high erratic torque; top drive max current = 650 A. | 2045 | 24 Apr |
1.00 |
0.04 |
185.25 |
7.72 |
|
| Pull back in hole with top drive to 890.6 mbsf. | 2145 | 24 Apr |
0.50 |
0.02 |
185.75 |
7.74 |
Decision to pump more cement. |
| Rack top drive. | 2215 | 24 Apr |
0.50 |
0.02 |
186.25 |
7.76 |
|
| POOH drill string from 890.6 to the surface. Clear seafloor at 0030 h. Bit at rotary table at 0615 h. | 2245 | 24 Apr |
7.50 |
0.31 |
193.75 |
8.07 |
Clear seafloor at 0300 h. End Run 4 at 0615 h. |
| Make up cementing bit (Reed type 517) without nozzles to 2 DC stands; RIH to 2661 mbrf. | 615 | 25 Apr |
6.00 |
0.25 |
199.75 |
8.32 |
Start Run 5: cementing bit (Reed type 517). |
| Deploy VIT. | 1215 | 25 Apr |
0.50 |
0.02 |
200.25 |
8.34 |
|
| Resume RIH drill string 2661–3637.8 mbrf. | 1245 | 25 Apr |
1.50 |
0.06 |
201.75 |
8.41 |
|
| Search and position vessel. Reenter Hole 1256D (Reentry #5) at 1445 h. | 1415 | 25 Apr |
0.50 |
0.02 |
202.25 |
8.43 |
Reentry 5. |
| Continue RIH drill string to 922 mbsf. | 1445 | 25 Apr |
2.50 |
0.10 |
204.75 |
8.53 |
|
| Install circulating head. Pressure test cement system. | 1715 | 25 Apr |
0.75 |
0.03 |
205.50 |
8.56 |
|
| Mix and pump 50 bbl of 15 ppg cement slurry. | 1800 | 25 Apr |
0.75 |
0.03 |
206.25 |
8.59 |
Pump cement. |
| Displace cement slurry with seawater. | 1845 | 25 Apr |
0.25 |
0.01 |
206.50 |
8.60 |
|
| Lay out circulating head and pull back in hole to 720.5 mbsf. | 1900 | 25 Apr |
0.75 |
0.03 |
207.25 |
8.64 |
|
| Circulate and flush drill pipe with seawater (3× drill string volume). | 1945 | 25 Apr |
1.00 |
0.04 |
208.25 |
8.68 |
|
| POOH drill string to surface. Clear the top of the cone at 2215 h. Bit at rotary table at 0345 h. | 2045 | 25 Apr |
7.00 |
0.29 |
215.25 |
8.97 |
Clear seafloor at 2215 h. End Run 5 at 0345 h. |
| Lay down Reed bit and pick up 9-7/8 inch Atlas HP61 tricone bit with tandem set of boot baskets and 2 DC stands; RIH to 200.6 mbrf. | 345 | 26 Apr |
1.75 |
0.07 |
217.00 |
9.04 |
Start Run 6: 9-7/8 inch Atlas HP61 tricone bit plus boot baskets. |
| Service rig: drawworks, crown, pipe stabber, traveling block, and dollies. | 530 | 26 Apr |
0.50 |
0.02 |
217.50 |
9.06 |
|
| Resume RIH 2676–3533 mbrf. | 600 | 26 Apr |
7.50 |
0.31 |
225.00 |
9.37 |
|
| Deploy VIT. | 1330 | 26 Apr |
0.50 |
0.02 |
225.50 |
9.40 |
|
| RIH drill string 3533–3638 mbrf. | 1400 | 26 Apr |
1.00 |
0.04 |
226.50 |
9.44 |
|
| Search and position vessel. Reenter Hole 1256D (Reentry #6) at 1520 h. | 1500 | 26 Apr |
0.25 |
0.01 |
226.75 |
9.45 |
Reentry 6. |
| Resume RIH drill string to 661.8 mbsf. | 1515 | 26 Apr |
1.75 |
0.07 |
228.50 |
9.52 |
|
| Recover VIT. | 1700 | 26 Apr |
0.50 |
0.02 |
229.00 |
9.54 |
|
| RIH drill string; make firm contact with cement at 882.0 mbsf. | 1730 | 26 Apr |
0.75 |
0.03 |
229.75 |
9.57 |
|
| Pick up top drive. | 1815 | 26 Apr |
0.50 |
0.02 |
230.25 |
9.59 |
|
| Drill out cement 882.0–922.0 mbsf. Circulate 40 bbl gel sweep at 904.6 mbsf. | 1845 | 26 Apr |
3.75 |
0.16 |
234.00 |
9.75 |
|
| Attempt to drill though bridge with high erratic torque. Circulate 50 bbl gel sweep at 922 mbsf. Continue to wash/ream at 922.0 mbsf. Top drive max current = 650 A. | 2230 | 26 Apr |
3.00 |
0.13 |
237.00 |
9.87 |
|
| Work stuck pipe at ~923 mbsf. Top drive max current = 800 A, overpull = 120,000 lb. | 130 | 27 Apr |
1.00 |
0.04 |
238.00 |
9.92 |
|
| Resume washing/reaming ledge at 922 mbsf with high rotary speed, high pump, and lighter WOB. We appeared to be making progress mid-morning only to lose it later in the day which may indicate that the obstruction is shifting. Circulate multiple 50 bbl hi-vis gel sweeps at 922 mbsf. Continue to wash/ream obstruction at 921.6 mbsf (tide ± 0.5 m). Circulate 100 bbl hi-vis gel sweep at 922.0 mbsf. | 230 | 27 Apr |
27.50 |
1.15 |
265.50 |
11.06 |
|
| Pull back with top drive 921.6–834.5 mbsf. | 600 | 28 Apr |
0.75 |
0.03 |
266.25 |
11.09 |
|
| Rack top drive. | 645 | 28 Apr |
0.50 |
0.02 |
266.75 |
11.11 |
|
| POOH from 834.5 mbsf and clear seafloor at 0850 h. Set back DC stands in the derrick and lay out junk baskets. Bit is at the rotary table at 1455 h. Lay out used bit in good condition with no appreciable shirttail wear, with all teeth intact, and exhibiting very little wear. | 715 | 28 Apr |
7.75 |
0.32 |
274.50 |
11.44 |
Clear seafloor at 0850 h. End Run 6 at 1455 h. Samples Run06-EXJB. |
| Make up new Smith tricone bit, bit sub with float, and 4 DC stands; RIH drill string to 2759 mbrf. | 1500 | 28 Apr |
5.75 |
0.24 |
280.25 |
11.68 |
Start Run 7: Smith tricone bit. |
| Slip and cut 115 ft of drilling line. | 2045 | 28 Apr |
1.50 |
0.06 |
281.75 |
11.74 |
|
| Install VIT. | 2215 | 28 Apr |
0.50 |
0.02 |
282.25 |
11.76 |
|
| Resume RIH drill string 2759–3640 mbrf. Fill DP every 10 stands. | 2245 | 28 Apr |
2.00 |
0.08 |
284.25 |
11.84 |
|
| Space out and position vessel to reenter Hole 1256D at 0135 h (Reentry #7). | 045 | 29 Apr |
0.75 |
0.03 |
285.00 |
11.88 |
Reentry 7. |
| RIH to 228.2 mbsf. | 130 | 29 Apr |
1.50 |
0.06 |
286.50 |
11.94 |
|
| Retrieve and recover VIT. | 300 | 29 Apr |
0.50 |
0.02 |
287.00 |
11.96 |
|
| Resume RIH 228.2–861.4 mbsf. | 330 | 29 Apr |
1.25 |
0.05 |
288.25 |
12.01 |
|
| Pick up top drive. | 445 | 29 Apr |
0.50 |
0.02 |
288.75 |
12.03 |
|
| RIH top drive 861.4–921.9 mbsf. | 515 | 29 Apr |
1.00 |
0.04 |
289.75 |
12.07 |
|
| Attempt to pass obstruction with pump and no rotation. No advance. | 615 | 29 Apr |
0.75 |
0.03 |
290.50 |
12.10 |
|
| Resume washing/reaming, drill though obstruction at 935.0 mbsf, and advance 921.9–941.5 mbsf. Circulate 100 bbl gel sweep at 931.0 mbsf. | 700 | 29 Apr |
17.00 |
0.71 |
307.50 |
12.81 |
Finally! |
| Continue washing/reaming 941.5–1143.2 mbsf. High torque and pump pressure increase of 500 psi when picking off slips at last connection. Circulate 50 bbl hi-vis gel sweeps at 988.6 and 1113.6 mbsf. | 000 | 30 Apr |
12.50 |
0.52 |
320.00 |
13.33 |
|
| Work back to 1114.4 mbsf and work out excess pump pressure and torque. | 1230 | 30 Apr |
1.50 |
0.06 |
321.50 |
13.40 |
|
| Resume washing/reaming 1143.2–1162.4 mbsf. High torque 500 psi pump pressure increase when coming off slips on last connection. | 1400 | 30 Apr |
2.50 |
0.10 |
324.00 |
13.50 |
|
| Work stuck pipe free. | 1630 | 30 Apr |
2.00 |
0.08 |
326.00 |
13.58 |
|
| Wash/ream 1162.4–1507.1 mbsf. Circulate 50 bbl hi-vis gel sweeps at 1142.6 and 1253.6 mbsf. Find 6 m of hard fill. | 1830 | 30 Apr |
14.75 |
0.61 |
340.75 |
14.20 |
Bottom of the hole. |
| Circulate 100 bbl hi-vis gel sweep. | 915 | 1 May |
1.25 |
0.05 |
342.00 |
14.25 |
|
| Pull back in hole 1507.1–1265.0 mbsf. | 1030 | 1 May |
1.75 |
0.07 |
343.75 |
14.32 |
|
| Set back top drive. | 1215 | 1 May |
0.50 |
0.02 |
344.25 |
14.34 |
|
| Pull drill string back in hole 1265.0–890.5 mbsf. | 1245 | 1 May |
2.00 |
0.08 |
346.25 |
14.43 |
|
| Pick up top drive. | 1445 | 1 May |
0.75 |
0.03 |
347.00 |
14.46 |
|
| RIH drill string and top drive to 967.3 mbsf with no drag or overpull. | 1530 | 1 May |
1.00 |
0.04 |
348.00 |
14.50 |
|
| Break circulation and spot 60 bbl of 10.5 ppg mud at 967 mbsf. | 1630 | 1 May |
0.50 |
0.02 |
348.50 |
14.52 |
|
| Pull back in hole with top drive to 861.7 mbsf. | 1700 | 1 May |
0.75 |
0.03 |
349.25 |
14.55 |
|
| Rack top drive. | 1745 | 1 May |
0.50 |
0.02 |
349.75 |
14.57 |
|
| POOH with top drive. Clear the top of the cone at 2005 h. Continue to POOH. Bit at rotary table at 0245 h. | 1815 | 1 May |
8.50 |
0.35 |
358.25 |
14.93 |
Clear seafloor at 2005 h. End Run 7 at 0245 h. |
| Make up cement BHA with used Reed 9-7/8 inch bit (without jets); RIH to 144 mbrf. | 245 | 2 May |
0.75 |
0.03 |
359.00 |
14.96 |
Start Run 8: cementing bit (used Reed 9-7/8 inch). |
| Service rig. | 330 | 2 May |
0.50 |
0.02 |
359.50 |
14.98 |
|
| RIH 144–2676 mbrf. Fill DP every 10 stands. | 400 | 2 May |
5.00 |
0.21 |
364.50 |
15.19 |
|
| Launch VIT. | 900 | 2 May |
0.75 |
0.03 |
365.25 |
15.22 |
|
| Resume RIH 2676–3637 mbrf. | 945 | 2 May |
3.00 |
0.13 |
368.25 |
15.34 |
|
| Search and position vessel. Reenter Hole 1256D at 1300 h. | 1245 | 2 May |
0.25 |
0.01 |
368.50 |
15.35 |
Reentry 8. |
| Resume RIH to 490.3 mbsf. | 1300 | 2 May |
1.25 |
0.05 |
369.75 |
15.41 |
|
| Recover VIT. | 1415 | 2 May |
0.50 |
0.02 |
370.25 |
15.43 |
|
| Continue RIH drill pipe to 960.5 mbsf. | 1445 | 2 May |
1.50 |
0.06 |
371.75 |
15.49 |
|
| Make up circulating head and pressure test same to 2000 psi. | 1615 | 2 May |
0.50 |
0.02 |
372.25 |
15.51 |
|
| Mix and pump 60 bbl of 15 ppg cement slurry. | 1645 | 2 May |
0.50 |
0.02 |
372.75 |
15.53 |
|
| Displace cement with seawater. | 1715 | 2 May |
0.50 |
0.02 |
373.25 |
15.55 |
|
| Lay out circulating head and pull back in hole to 605.5 mbsf. | 1745 | 2 May |
1.00 |
0.04 |
374.25 |
15.59 |
|
| Flush drill string with seawater (3x DP volume). | 1845 | 2 May |
1.00 |
0.04 |
375.25 |
15.64 |
|
| POOH drill string. Clear seafloor at 2105 h. Bit at rotary table at 0315 h. | 1945 | 2 May |
7.50 |
0.31 |
382.75 |
15.95 |
Clear seafloor at 0315 h. End Run 8 at 0315 h. |
| Lay out Reed tricone bit, pick up RCB assembly, and RIH to 200 mbrf. Space out RCB assembly. | 315 | 3 May |
2.75 |
0.11 |
385.50 |
16.06 |
Start Run 9: RCB assembly. |
| Service rig and RIS load pin transmitters. | 600 | 3 May |
0.50 |
0.02 |
386.00 |
16.08 |
|
| RIH DP 200–2732 mbrf. | 630 | 3 May |
4.00 |
0.17 |
390.00 |
16.25 |
|
| Deploy VIT. | 1030 | 3 May |
0.50 |
0.02 |
390.50 |
16.27 |
|
| Resume RIH 2732–3637 mbrf. | 1100 | 3 May |
1.25 |
0.05 |
391.75 |
16.32 |
|
| Search and position for reentry. Reenter Hole 1256D (Reentry #8) at 1235 h. | 1215 | 3 May |
0.25 |
0.01 |
392.00 |
16.33 |
Reentry 9. |
| RIH DP to 690.2 mbsf. | 1230 | 3 May |
1.25 |
0.05 |
393.25 |
16.39 |
|
| RIH DP and tag contact (ledge or top of plug) at 924.0 mbsf. | 1345 | 3 May |
1.25 |
0.05 |
394.50 |
16.44 |
|
| Pull back in hole 924.0–891.5 mbsf. | 1500 | 3 May |
0.25 |
0.01 |
394.75 |
16.45 |
|
| Pick up top drive. | 1515 | 3 May |
0.75 |
0.03 |
395.50 |
16.48 |
|
| Drill nonmagnetic core barrels and drop same. Establish SCR parameters. | 1600 | 3 May |
1.75 |
0.07 |
397.25 |
16.55 |
|
| Cut cement Cores 1G–5G (924.0–971.3 mbsf). | 1745 | 3 May |
12.25 |
0.51 |
409.50 |
17.06 |
|
| Pull back in hole to 833.9 mbsf. | 600 | 4 May |
0.75 |
0.03 |
410.25 |
17.09 |
|
| Rack top drive. | 645 | 4 May |
0.50 |
0.02 |
410.75 |
17.11 |
|
| Slip and cut 115 ft of drilling line. | 715 | 4 May |
1.50 |
0.06 |
412.25 |
17.18 |
|
| Drop wash barrel. | 845 | 4 May |
0.25 |
0.01 |
412.50 |
17.19 |
|
| RIH 833.9–949.1 mbsf. | 900 | 4 May |
0.50 |
0.02 |
413.00 |
17.21 |
|
| Pick up top drive. | 930 | 4 May |
0.50 |
0.02 |
413.50 |
17.23 |
|
| Continue to RIH with top drive 949.1–971.3 mbsf. | 1000 | 4 May |
0.50 |
0.02 |
414.00 |
17.25 |
|
| Round trip wash barrel and core 6G (971.3–980.9 mbsf). | 1030 | 4 May |
3.00 |
0.13 |
417.00 |
17.38 |
|
| Drop wash barrel and wash 980.9–1507.1 mbsf. Note tight hole at 1499.6–1501.1 mbsf. Pump 50 bbl hi-sweeps at 1154.6 and 1501.1 mbsf. | 1330 | 4 May |
9.25 |
0.39 |
426.25 |
17.76 |
|
| Circulate 50 bbl hi-vis gel sweep. | 2245 | 4 May |
1.00 |
0.04 |
427.25 |
17.80 |
|
| Deploy sinker bars. Round trip wash barrel at 1497.0 mbsf. Drop fresh core barrel. | 2345 | 4 May |
2.00 |
0.08 |
429.25 |
17.89 |
|
| RCB cores 235R–236R (1507.1–1516.5 mbsf), employing half-cores with no liners to improve recovery. All cores obtained with nonmagnetic core barrels. | 145 | 5 May |
15.25 |
0.64 |
444.50 |
18.52 |
First 335 core! 235R (7%); 236R (13%). |
| Attempt to core 237R (1516.5–1518.2 mbsf); max overpull = 60,000 lb, top drive max current = 800 A, WOB = 0. | 1700 | 5 May |
3.50 |
0.15 |
448.00 |
18.67 |
|
| RIH coring line and retrieve Core 237R (1516.5–1518.2 mbsf). Circulate 50 and 100 bbl hi-vis gel sweeps at 1518.2 mbsf. | 2030 | 5 May |
1.25 |
0.05 |
449.25 |
18.72 |
237R (empty). |
| Drop core barrel and attempt to core 238R (1518.2–1520.2 mbsf; tidal = ±0.8 m). Pump 50 bbl hi-vis sweep at 1520.2 mbsf. Average ROP for May 5 = 0.7 m/h. | 2145 | 5 May |
14.25 |
0.59 |
463.50 |
19.31 |
|
| RIH sinker bars and recover core barrel containing 20 cm roller. | 1200 | 6 May |
1.50 |
0.06 |
465.00 |
19.38 |
238R. |
| Drop bit deplugger. Core catcher sub was ~0.5 inch abraded, indicating downhole mechanical problem. | 1330 | 6 May |
0.50 |
0.02 |
465.50 |
19.40 |
|
| RIH sinker bars and recover deplugger. Lay out same. Pump 70 bbl of 10.5 ppg mud. | 1400 | 6 May |
1.25 |
0.05 |
466.75 |
19.45 |
|
| Rack top drive. | 1515 | 6 May |
1.50 |
0.06 |
468.25 |
19.51 |
|
| Pull back in hole with drill string to 58.2 mbsf. | 1645 | 6 May |
3.75 |
0.16 |
472.00 |
19.67 |
|
| Flush drill string with seawater to clean reentry cone of cuttings. | 2030 | 6 May |
0.50 |
0.02 |
472.50 |
19.69 |
|
| POOH DP to the surface. Clear seafloor at 2115 h. Clear rotary table at 0545 h. Bit body honed to a smooth profile at bottom and sides. Bit missing all 4 cones, 4 legs, and core guides. Bit spiral stabilizer blades and embedded TCI inserts absent. Bit totally unrecognizable. | 2100 | 6 May |
8.75 |
0.36 |
481.25 |
20.05 |
Clear seafloor at 2115 h. End Run 9 at 0545 h. Bit disintegrated. |
| Prepare and make up Bowen 9 inch fishing magnet with 2 boot baskets to 2 stands of DC; RIH to 147 mbrf. | 545 | 7 May |
3.00 |
0.13 |
484.25 |
20.18 |
Start Run 10: Bowen 9 inch fishing magnet plus two junk baskets. |
| Service rig. | 845 | 7 May |
0.50 |
0.02 |
484.75 |
20.20 |
|
| Resume RIH 147–2680 mbrf. | 915 | 7 May |
5.00 |
0.21 |
489.75 |
20.41 |
|
| Install VIT. | 1415 | 7 May |
0.50 |
0.02 |
490.25 |
20.43 |
|
| Resume RIH drill string 2680–3632 mbrf. | 1445 | 7 May |
1.75 |
0.07 |
492.00 |
20.50 |
|
| Search and position vessel for reentry. Observe reentry cone clouded over with mud. Attempt reentry, miss cone, and pull back. Break circulation and reenter (Reentry #10) at 1815 h. | 1630 | 7 May |
1.75 |
0.07 |
493.75 |
20.57 |
Reentry 10. |
| RIH drill string to 580.1 mbsf. | 1815 | 7 May |
1.25 |
0.05 |
495.00 |
20.63 |
|
| Recover VIT. | 1930 | 7 May |
0.50 |
0.02 |
495.50 |
20.65 |
|
| RIH DP 580.1–1294.6 mbsf. Contact ledge that takes 10,000 lb. | 2000 | 7 May |
2.25 |
0.09 |
497.75 |
20.74 |
|
| Pick up top drive. | 2215 | 7 May |
0.50 |
0.02 |
498.25 |
20.76 |
|
| RIH top drive 1328.7–1434.2 mbsf. Tight hole at 1328.7 mbsf takes 10,000 lb. Excessive rotary current at 20 spm. Note increase in pump pressure (2500 psi at 20 spm). Bleed off pressure at rig floor. | 2245 | 7 May |
3.00 |
0.13 |
501.25 |
20.89 |
|
| Pull back in hole 1434.2–1395.8 mbsf and attempt to unplug drill string with high pressure. No joy. | 145 | 8 May |
1.25 |
0.05 |
502.50 |
20.94 |
|
| Pull back in hole 1395.8–1242.3 mbsf with top drive. | 300 | 8 May |
1.50 |
0.06 |
504.00 |
21.00 |
|
| Rack top drive. | 430 | 8 May |
0.50 |
0.02 |
504.50 |
21.02 |
|
| Pull back in hole 1242.3–264.2 mbsf to just inside casing shoe. | 500 | 8 May |
2.00 |
0.08 |
506.50 |
21.10 |
|
| Attempt to circulate with circulating head. No joy. | 700 | 8 May |
0.25 |
0.01 |
506.75 |
21.11 |
|
| POOH from 264.2 mbsf, clear seafloor at 0755 h. Recover drill string and set back 2 stands of DC. Find 4 m of fine cuttings plugging inside of bit sub and the 2 junk baskets. Clean out same. Lay out magnet, which is at the rotary table at 1555 h. | 715 | 8 May |
8.75 |
0.36 |
515.50 |
21.48 |
Clear seafloor at 0755 h. End Run 10 at 1555 h. Bit sub and junk basket filled with cuttings. Samples Run10-DC, Run10-EXJB, and Run10-FM. |
| Make up Atlas tricone bit to dual set of junk baskets with 3 DC stands and deploy to 2704 mbrf. | 1600 | 8 May |
8.00 |
0.33 |
523.50 |
21.81 |
Start Run 11: Atlas tricone bit plus junk baskets. |
| Launch VIT. | 000 | 9 May |
1.00 |
0.04 |
524.50 |
21.85 |
|
| Continue RIH DP 2704–3637 mbrf. Fill every 10 stands. | 100 | 9 May |
2.00 |
0.08 |
526.50 |
21.94 |
|
| Space out and reenter Hole 1256D at 0315 h (Run 11). | 300 | 9 May |
0.25 |
0.01 |
526.75 |
21.95 |
Reentry 11. |
| Continue RIH to 461.2 mbsf. | 315 | 9 May |
1.00 |
0.04 |
527.75 |
21.99 |
|
| Recover VIT. | 415 | 9 May |
0.50 |
0.02 |
528.25 |
22.01 |
|
| Resume RIH 461.2–1356.1 mbsf where bit contacts ledge. Pull back to 1324.3 mbsf. | 445 | 9 May |
2.50 |
0.10 |
530.75 |
22.11 |
|
| Pick up top drive and obtain SCR parameters. | 715 | 9 May |
0.50 |
0.02 |
531.25 |
22.14 |
|
| Clean up ledge at 1356.1 mbsf and continue in hole to 1442.5 mbsf. | 745 | 9 May |
1.50 |
0.06 |
532.75 |
22.20 |
|
| Circulate 100 bbl hi-vis gel sweep at 1442.5 mbsf. | 915 | 9 May |
0.75 |
0.03 |
533.50 |
22.23 |
|
| RIH 1442.5–1520.3 mbsf. Clean up undergauge areas of hole with top drive max current = 500 A. | 1000 | 9 May |
1.50 |
0.06 |
535.00 |
22.29 |
|
| Circulate 100 bbl hi-vis gel sweep at 1520.3 mbsf. | 1130 | 9 May |
0.50 |
0.02 |
535.50 |
22.31 |
|
| Continue to circulate hole clean and work rathole at 1520.3 mbsf. Circulate 100 bbl hi-vis gel sweep and circulate seawater (3× volume of annulus). | 1200 | 9 May |
4.25 |
0.18 |
539.75 |
22.49 |
|
| Pull back in hole with top drive 1520.3–1363.0 mbsf. | 1615 | 9 May |
1.50 |
0.06 |
541.25 |
22.55 |
|
| RIH with top drive and tag ledge at 1473 mbsf. Work though ledge with pumps and rotation. Observe excess pump pressure and torque off slips at 1477.5 mbsf. Unable to pump. Reestablish rotation and circulation. | 1745 | 9 May |
1.75 |
0.07 |
543.00 |
22.62 |
|
| Work pipe 1477.5–1459.0 mbsf. Clear excess pump pressure and torque. Top drive max current = 700 A; max pump pressure = 3000 psi. | 1930 | 9 May |
0.75 |
0.03 |
543.75 |
22.66 |
|
| RIH with top drive and ream 1477.6–1484.6 mbsf. Continue to RIH with top drive to 1518.2 mbsf. | 2015 | 9 May |
2.50 |
0.10 |
546.25 |
22.76 |
|
| Pump 150 bbl gel sweep at 1518.2 mbsf. | 2245 | 9 May |
2.25 |
0.09 |
548.50 |
22.85 |
|
| Pull back in hole with top drive 1518.2–1324.6 mbsf. | 100 | 10 May |
1.50 |
0.06 |
550.00 |
22.92 |
|
| Set back top drive. | 230 | 10 May |
0.50 |
0.02 |
550.50 |
22.94 |
|
| Resume pulling back in hole 1324.6–78.2 mbsf. | 300 | 10 May |
2.50 |
0.10 |
553.00 |
23.04 |
|
| Flush top of cone with seawater. | 530 | 10 May |
0.25 |
0.01 |
553.25 |
23.05 |
|
| POOH drill string from 78.2 mbsf. Clear seafloor at 0605 h. Bit at rotary table at 1130 h. | 545 | 10 May |
5.75 |
0.24 |
559.00 |
23.29 |
Clear seafloor at 0605 h. End Run 11 at 1130 h. |
| Empty junk baskets and lay out tricone. | 1130 | 10 May |
0.75 |
0.03 |
559.75 |
23.32 |
Nice cuttings in junk baskets. Samples Run11-EXJB. |
| Make up Bowen reverse circulating junk basket, 1 junk basket, and 2 DC stands; RIH to 2679 mbrf. | 1215 | 10 May |
7.25 |
0.30 |
567.00 |
23.62 |
Start Run 12: Bowen reverse circulation junk basket. |
| Slip and cut 115 ft of drilling line. | 1930 | 10 May |
1.50 |
0.06 |
568.50 |
23.69 |
|
| Install VIT. | 2100 | 10 May |
0.75 |
0.03 |
569.25 |
23.72 |
|
| Resume RIH drill string 2679–3640 mbrf. | 2145 | 10 May |
1.50 |
0.06 |
570.75 |
23.78 |
|
| Search and position vessel. Reenter Hole 1256D at 2330 h (Reentry #12). | 2315 | 10 May |
0.08 |
0.00 |
570.83 |
23.78 |
Reentry 12. |
| RIH to 808.7 mbsf. | 2320 | 10 May |
1.67 |
0.07 |
572.50 |
23.85 |
|
| Recover VIT. | 100 | 11 May |
0.50 |
0.02 |
573.00 |
23.87 |
|
| Resume RIH 808.7–1327.5 mbsf. | 130 | 11 May |
1.00 |
0.04 |
574.00 |
23.92 |
|
| Pick up top drive. | 230 | 11 May |
0.50 |
0.02 |
574.50 |
23.94 |
|
| Obtain SCR parameters and RIH 1327.5–1517.9 mbsf. | 300 | 11 May |
3.50 |
0.15 |
578.00 |
24.08 |
|
| Clean hole. Circulate at 150 spm with 1600 psi. Find 2.5 m of fill. | 630 | 11 May |
2.00 |
0.08 |
580.00 |
24.17 |
|
| Pump 100 bbl hi-vis sweep and chase with seawater (1.5x drill string volume). | 830 | 11 May |
1.00 |
0.04 |
581.00 |
24.21 |
|
| Drop stainless steel ball at 0937 h and activate reverse circulation in Bowen junk basket. | 930 | 11 May |
0.50 |
0.02 |
581.50 |
24.23 |
RCJB. |
| Attempt to drill over junk at the bottom of the hole. | 1000 | 11 May |
0.50 |
0.02 |
582.00 |
24.25 |
|
| Pull back in hole 1516.1–1328.6 mbsf. | 1030 | 11 May |
1.50 |
0.06 |
583.50 |
24.31 |
|
| Rack top drive. | 1200 | 11 May |
0.50 |
0.02 |
584.00 |
24.33 |
|
| POOH 1328.6–58.9 mbrf. Clear top of cone at 1520 h. | 1230 | 11 May |
9.00 |
0.38 |
593.00 |
24.71 |
Clear seafloor at 1520 h. End Run 12 at 2200 h. Samples Run12-DC, Run12-EXJB, Run12-RCJB. |
| Find BHA DC up to tapered DC filled with fine cuttings (50 m) weighing several hundred kg. Individually clear each DC and provide contents to scientists. Coarser gravel found in the head, crossover, and bit subs. Empty and clean out the Bowen tool containing ~20 kg of granoblastic dike rocks. | 2130 | 11 May |
8.00 |
0.33 |
601.00 |
25.04 |
Big rock samples, no cone. |
| Service rig. | 530 | 12 May |
0.50 |
0.02 |
601.50 |
25.06 |
|
| Make up Bowen tool with single junk basket and 2 DC stands; RIH to 2678 mbrf. | 600 | 12 May |
5.50 |
0.23 |
607.00 |
25.29 |
Start Run 13: Bowen RCJB. |
| Launch VIT. | 1130 | 12 May |
0.50 |
0.02 |
607.50 |
25.31 |
|
| Resume RIH 2678–3631 mbrf. | 1200 | 12 May |
1.25 |
0.05 |
608.75 |
25.36 |
|
| Search and position vessel. Reenter Hole 1256D at 1335 h. | 1315 | 12 May |
0.25 |
0.01 |
609.00 |
25.37 |
Reentry 13. |
| RIH DP to 664.8 mbsf. | 1330 | 12 May |
1.50 |
0.06 |
610.50 |
25.44 |
|
| Recover VIT. | 1500 | 12 May |
0.50 |
0.02 |
611.00 |
25.46 |
|
| Resume RIH 664.8–1384.8 mbsf. | 1530 | 12 May |
1.50 |
0.06 |
612.50 |
25.52 |
|
| Pick up top drive. | 1700 | 12 May |
0.50 |
0.02 |
613.00 |
25.54 |
|
| RIH with top drive and rotation and circulation past a soft tag at 1465.0 mbsf and a hard tag at 1518.0 mbsf. Backflow on connections starting at 1470.0 mbsf. | 1730 | 12 May |
2.75 |
0.11 |
615.75 |
25.66 |
|
| Work drill string to 1518.0 mbsf and fail in an attempt to penetrate to 1520.2 mbsf with max WOB = 2000–4000 lb and 160 spm at 1600 psi. Top drive current = 200–400 A. Circulate 100 bbl hi-vis sweep. Chase same with seawater (2× drill string volume). | 2015 | 12 May |
2.00 |
0.08 |
617.75 |
25.74 |
|
| Drop stainless steel ball to activate reverse circulation. Unable to shear pins in tool with pump pressure as high as 3000 psi at 50 spm. | 2215 | 12 May |
0.75 |
0.03 |
618.50 |
25.77 |
|
| Pull back in hole with top drive to 1327.3 mbsf. | 2300 | 12 May |
1.75 |
0.07 |
620.25 |
25.84 |
|
| Rack top drive. | 045 | 13 May |
0.50 |
0.02 |
620.75 |
25.86 |
|
| POOH from 1327.3 mbsf and clear seafloor at 0340 h. Bowen junk basket at rotary table at 1100 h. Basket contains granoblastic dike rocks as large as 3.4 kg. Apparently the Bowen tool was activated by the stainless steel ball. The loss of circulation was probably due to clogged jets. Almost the entire BHA was filled with fine cuttings again. | 115 | 13 May |
9.75 |
0.41 |
630.50 |
26.27 |
Clear seafloor at 0340 h. End Run 13 at 1100 h. Samples Run13-DC, Run13-EXJB, Run13-RCJB. |
| Dismantle Bowen reverse circulating junk basket and clean all components and service. | 1100 | 13 May |
1.75 |
0.07 |
632.25 |
26.34 |
|
| Lay down Bowen tool and pick up Homco 9.75 inch flow-though junk basket with bit sub junk basket and float, 2-stand BHA, and boot basket. Lay out 1 joint of 5-1/2 inch of transition pipe. RIH to 2670 mbrf. | 1245 | 13 May |
7.75 |
0.32 |
640.00 |
26.67 |
Start Run 14: Homco 9.75 inch flow-though junk basket with bit sub junk basket and float. |
| Deploy VIT. | 2030 | 13 May |
0.75 |
0.03 |
640.75 |
26.70 |
|
| RIH DP 2670–3631 mbrf. | 2115 | 13 May |
1.75 |
0.07 |
642.50 |
26.77 |
|
| Search and position vessel. Reenter Hole 1256D at 2315 h (Reentry #14). | 2300 | 13 May |
0.25 |
0.01 |
642.75 |
26.78 |
Reentry 14. |
| RIH drill string to 512.1 mbsf. | 2315 | 13 May |
1.50 |
0.06 |
644.25 |
26.84 |
|
| Recover VIT. | 045 | 14 May |
2.25 |
0.09 |
646.50 |
26.94 |
|
| Resume RIH 512.1–1404.3 mbsf. | 300 | 14 May |
0.50 |
0.02 |
647.00 |
26.96 |
|
| Continue RIH 1404.3–1517.2 mbsf. | 330 | 14 May |
2.25 |
0.09 |
649.25 |
27.05 |
|
| Pump 100 bbl sweep and continue to work down to top of fish at 1521.0 mbsf. | 545 | 14 May |
2.50 |
0.10 |
651.75 |
27.16 |
|
| Attempt to recover junk/fish. | 815 | 14 May |
0.50 |
0.02 |
652.25 |
27.18 |
|
| Circulate 50 bbl sweep at 1520.0 mbsf. | 845 | 14 May |
1.00 |
0.04 |
653.25 |
27.22 |
|
| Pull back in hole with top drive 1519.2–1404.6 mbsf. | 945 | 14 May |
0.75 |
0.03 |
654.00 |
27.25 |
|
| Rack top drive. | 1030 | 14 May |
0.50 |
0.02 |
654.50 |
27.27 |
|
| POOH with drill string and clear seafloor at 1345 h. Rack back DC in derrick. Homco FTJB clears rotary at 2010 h. | 1100 | 14 May |
9.25 |
0.39 |
663.75 |
27.66 |
Clear seafloor at 1345 h. End Run 14 at 2010 h. Samples Run14-EXJB, BSJB, FTJB. |
| Empty FTJB of 2 rocks (combined weight = 3.2 kg). Lower set of junk catcher fingers completely torn out. | 2015 | 14 May |
0.75 |
0.03 |
664.50 |
27.69 |
|
| Make up new Smith hard formation 9-7/8 inch tricone bit with single junk basket to 3-stand BHA and RIH to 84 mbrf. | 2100 | 14 May |
1.25 |
0.05 |
665.75 |
27.74 |
Start Run 15: Smith hard formation 9-7/8 inch tricone bit with single junk basket. |
| Slip and cut 115 ft of drilling line. | 2215 | 14 May |
1.50 |
0.06 |
667.25 |
27.80 |
|
| RIH with 5-1/2 inch transition pipe to 132.9 mbrf. | 2345 | 14 May |
0.25 |
0.01 |
667.50 |
27.81 |
|
| Service rig. | 000 | 15 May |
0.50 |
0.02 |
668.00 |
27.83 |
|
| Resume RIH 5-1/2 inch transition pipe 133–2694 mbrf, filling every 10 stands. | 030 | 15 May |
4.50 |
0.19 |
672.50 |
28.02 |
|
| Deploy VIT. | 500 | 15 May |
0.50 |
0.02 |
673.00 |
28.04 |
|
| Resume RIH 2694–3924 mbrf. Reenter Hole 1256D (Reentry #15) at 0730 h and RIH to 278.5 mbsf | 530 | 15 May |
3.00 |
0.13 |
676.00 |
28.17 |
Reentry 15. |
| Recover VIT. | 830 | 15 May |
0.50 |
0.02 |
676.50 |
28.19 |
|
| RIH 278.5–1371.8 mbsf. | 900 | 15 May |
3.25 |
0.14 |
679.75 |
28.32 |
|
| Pick up top drive. | 1215 | 15 May |
0.50 |
0.02 |
680.25 |
28.34 |
|
| Resume RIH from 1371.8 mbsf. Tag soft fill at 1510.0 mbsf and hard tag at 1518.8 mbsf. | 1245 | 15 May |
1.50 |
0.06 |
681.75 |
28.41 |
|
| Pick up 30 ft knobby and work bit with light WOB at 1518.5 mbsf and then down to 1520.6 mbsf multiple times, attempting to stabilize the bottom 2–3 m of the hole. Hole packs off below 1518.0 mbsf and requires working back to bottom. Circulate multiple mud sweeps at 1520.6 mbsf (total = 400 bbl). Continue to work drill string 1518.5–1521.05 mbsf. Pump 200 bbl of sweeps. Pull drill string to inspect and change the bit. | 1415 | 15 May |
16.00 |
0.67 |
697.75 |
29.07 |
|
| Pull back in hole with top drive 1515.5–1410.1 mbsf. | 615 | 16 May |
1.25 |
0.05 |
699.00 |
29.12 |
|
| Rack top drive. | 730 | 16 May |
0.50 |
0.02 |
699.50 |
29.15 |
|
| POOH drill string and clear seafloor at 1015 h. Rack back 3 stands. Bit clears rotary table at 1545 h. Inspect bit and find bearings still tight with virtually no wear on teeth except for a single chipped tooth on the heel. Bit is under gauge by 0.4 inches with some shirttail wear and minor junk damage on body. | 800 | 16 May |
7.75 |
0.32 |
707.25 |
29.47 |
Clear seafloor at 1015 h. End Run 15 at 1545 h. Samples Run15-EXJB. |
| Clean out junk basket. | 1545 | 16 May |
0.50 |
0.02 |
707.75 |
29.49 |
|
| Make up new 9-7/8 inch Smith FH3VPS tricone to a 3-stand BHA; RIH to 2693 mbrf. | 1615 | 16 May |
7.75 |
0.32 |
715.50 |
29.81 |
Start Run 16: 9-7/8 inch Smith FH3VPS tricone bit. |
| Deploy VIT. | 000 | 17 May |
0.50 |
0.02 |
716.00 |
29.83 |
|
| Resume RIH 2693–3644 mbrf. | 030 | 17 May |
2.00 |
0.08 |
718.00 |
29.92 |
|
| Space out to reenter. Reenter Hole 1256D at 0245 h (Reentry #16). | 230 | 17 May |
0.25 |
0.01 |
718.25 |
29.93 |
Reentry 16. |
| Resume RIH to 507.2 mbsf. Fill pipe every 10 stands. | 245 | 17 May |
1.25 |
0.05 |
719.50 |
29.98 |
|
| Recover VIT. | 400 | 17 May |
0.50 |
0.02 |
720.00 |
30.00 |
|
| Continue RIH 507.2–1399.7 mbsf. | 430 | 17 May |
2.00 |
0.08 |
722.00 |
30.08 |
|
| Pick up top drive. | 630 | 17 May |
0.50 |
0.02 |
722.50 |
30.10 |
|
| RIH 1399.7–1516.5 mbsf. | 700 | 17 May |
1.25 |
0.05 |
723.75 |
30.16 |
|
| Wash/ream 1516.5–1519.7 mbsf. Circulate 60 bbl sweep at 1516.7 mbsf. Flush hole with 200 bbl mud at 1519.6 mbsf. | 815 | 17 May |
16.00 |
0.67 |
739.75 |
30.82 |
|
| Pull back in hole with top drive 1519.6–1399.7 mbsf. | 015 | 18 May |
0.75 |
0.03 |
740.50 |
30.85 |
|
| Rack top drive. | 100 | 18 May |
0.50 |
0.02 |
741.00 |
30.87 |
|
| POOH drill string. Clear seafloor at 0340 h. Bit at rotary table at 0900 h. Lay out used tricone bit (in gauge) and minus 6 teeth on one cone. | 130 | 18 May |
7.50 |
0.31 |
748.50 |
31.19 |
Clear seafloor at 0340 h. End Run 16 at 0900 h. |
| Make up 9-5/8 inch flat-bottomed mill with EXJB and 3-stand BHA and RIH to 162 mbrf. | 900 | 18 May |
1.50 |
0.06 |
750.00 |
31.25 |
Start Run 17: 9-5/8 inch flat-bottomed mill with EXJB. |
| Service rig. | 1030 | 18 May |
0.50 |
0.02 |
750.50 |
31.27 |
|
| Resume RIH 162–2695 mbrf. | 1100 | 18 May |
4.75 |
0.20 |
755.25 |
31.47 |
|
| Install VIT. | 1545 | 18 May |
0.50 |
0.02 |
755.75 |
31.49 |
|
| RIH 2695–3637 mbrf. | 1615 | 18 May |
2.50 |
0.10 |
758.25 |
31.59 |
|
| Search and position vessel. Reenter Hole 1256D at 1850 h. | 1845 | 18 May |
0.25 |
0.01 |
758.50 |
31.60 |
Reentry 17. |
| RIH drill string to 480.5 mbsf. | 1900 | 18 May |
1.25 |
0.05 |
759.75 |
31.66 |
|
| Recover VIT. | 2015 | 18 May |
0.50 |
0.02 |
760.25 |
31.68 |
|
| Resume RIH 480.5–1429.9 mbsf. | 2045 | 18 May |
2.75 |
0.11 |
763.00 |
31.79 |
|
| Pick up top drive. | 2330 | 18 May |
0.50 |
0.02 |
763.50 |
31.81 |
|
| Continue RIH with top drive 1429.9–1520.0 mbsf. | 000 | 19 May |
1.50 |
0.06 |
765.00 |
31.87 |
|
| Mill debris at 1520.0–1521.0 mbsf. Use junk basket pump sweeps. Pump 200 bbl sweep at 1520.0 mbsf. | 130 | 19 May |
12.00 |
0.50 |
777.00 |
32.37 |
|
| Circulate 100 bbl sweep and chase same with seawater (2× drill string volume). | 1330 | 19 May |
1.25 |
0.05 |
778.25 |
32.43 |
|
| Lay out 30 ft knobby and pull back in hole with top drive to 1429.9 mbsf. | 1445 | 19 May |
0.75 |
0.03 |
779.00 |
32.46 |
|
| Rack top drive. | 1530 | 19 May |
0.50 |
0.02 |
779.50 |
32.48 |
|
| POOH and clear seafloor at 1920 h. Offset vessel 50 m west and continue POOH to 2354 mbrf. | 1600 | 19 May |
5.50 |
0.23 |
785.00 |
32.71 |
Clear seafloor at 1920 h. |
| Slip and cut 115 ft of drilling line. | 2130 | 19 May |
1.50 |
0.06 |
786.50 |
32.77 |
|
| Resume POOH to surface. Used mill at rotary table at 0315 h. | 2300 | 19 May |
4.25 |
0.18 |
790.75 |
32.95 |
End Run 17 at 0315 h. Samples Run17-BSJB. |
| Lay out mill. Clean and lay out damaged junk basket. Mill heavily worn and under gauge by ~0.5 inches. Pick up new 9 inch flat mill with fresh junk basket; RIH to 162 mbrf. | 315 | 20 May |
2.25 |
0.09 |
793.00 |
33.04 |
Start Run 18: 9 inch flat mill with junk basket. |
| Service rig. | 530 | 20 May |
1.00 |
0.04 |
794.00 |
33.08 |
|
| Resume RIH 162–2694 mbrf while filling every 10 stands. | 630 | 20 May |
5.00 |
0.21 |
799.00 |
33.29 |
|
| Launch VIT. | 1130 | 20 May |
0.50 |
0.02 |
799.50 |
33.31 |
|
| Resume RIH 2694–3637 mbrf. | 1200 | 20 May |
1.75 |
0.07 |
801.25 |
33.39 |
|
| Search and position vessel. Reenter Hole 1256D (Reentry #18) at 1415 h. | 1345 | 20 May |
0.50 |
0.02 |
801.75 |
33.41 |
Reentry 18. |
| RIH drill string to 451.2 mbsf. | 1415 | 20 May |
1.25 |
0.05 |
803.00 |
33.46 |
|
| Recover VIT. | 1530 | 20 May |
0.50 |
0.02 |
803.50 |
33.48 |
|
| Resume RIH 451.2–1458.6 mbsf. | 1600 | 20 May |
2.25 |
0.09 |
805.75 |
33.57 |
|
| Pick up top drive. | 1815 | 20 May |
0.50 |
0.02 |
806.25 |
33.59 |
|
| RIH with top drive; tag fill at 1518.9 mbsf. Advance with low pump and rotary speed and tag hard fill at 1520.4 mbsf. | 1845 | 20 May |
1.00 |
0.04 |
807.25 |
33.64 |
|
| Mill junk and work junk basket. Pump 100 bbl sepiolite sweep; pump 120 bbl sweep at 1520.9 mbsf. | 1945 | 20 May |
6.00 |
0.25 |
813.25 |
33.89 |
|
| Pump 100 bbl sepiolite sweep and circulate out. | 145 | 21 May |
1.25 |
0.05 |
814.50 |
33.94 |
|
| Pull back in hole with top drive 1520.9–1429.8 mbsf. | 300 | 21 May |
1.00 |
0.04 |
815.50 |
33.98 |
|
| Rack top drive. | 400 | 21 May |
0.50 |
0.02 |
816.00 |
34.00 |
|
| POOH from 1520.9 mbsf and clear seafloor at 0645 h; milling tool at drill floor at 1225 h. The abrasive surface of the milling tool was eroded, with some external junk damage on the side of the tool and the crossover sub directly above the mill. | 430 | 21 May |
8.00 |
0.33 |
824.00 |
34.33 |
Clear seafloor at 0645 h. |
| Empty and clean out the external junk basket. In addition to the usual rock fragments and fine cuttings, some flakes of what appears to be freshly ground metal were also found. | 1230 | 21 May |
0.25 |
0.01 |
824.25 |
34.34 |
End Run 18 at 1225 h. Samples Run18-BSJB. |
| Make up RCJB with 3 EXJB and deploy along with a 2-stand BHA. RIH to 2670 mbrf. | 1245 | 21 May |
7.50 |
0.31 |
831.75 |
34.66 |
Start Run 19: RCJB plus 3 EXJB. |
| Install VIT. | 2015 | 21 May |
0.50 |
0.02 |
832.25 |
34.68 |
|
| RIH drill string to 3632 mbrf. | 2045 | 21 May |
1.50 |
0.06 |
833.75 |
34.74 |
|
| Search and position vessel. Reenter Hole 1256D (Run 19) at 2230 h. | 2215 | 21 May |
0.25 |
0.01 |
834.00 |
34.75 |
Reentry 19. |
| RIH DP to 599.6 mbsf. | 2230 | 21 May |
1.25 |
0.05 |
835.25 |
34.80 |
|
| Recover VIT. | 2345 | 21 May |
0.50 |
0.02 |
835.75 |
34.82 |
|
| Continue RIH 599.6–1405.7 mbsf. | 015 | 22 May |
1.25 |
0.05 |
837.00 |
34.87 |
|
| Pick up top drive. | 130 | 22 May |
0.50 |
0.02 |
837.50 |
34.90 |
|
| RIH 1405.7–1519.5 mbsf. Hard tag at 1519.5 mbsf. | 200 | 22 May |
1.25 |
0.05 |
838.75 |
34.95 |
|
| Work junk baskets. | 315 | 22 May |
0.50 |
0.02 |
839.25 |
34.97 |
|
| Pump 100 bbl sweep and chase same with seawater (2× annular volume). Continue to work junk baskets. | 345 | 22 May |
2.00 |
0.08 |
841.25 |
35.05 |
|
| Drop stainless steel ball in open pipe. Advance RCJB to 1520.5 mbsf with slow rotation and light WOB. Jog rotation attempting to catch debris. | 545 | 22 May |
1.25 |
0.05 |
842.50 |
35.10 |
|
| Pull back in hole with top drive 1520.5–1434.4 mbsf. | 700 | 22 May |
0.50 |
0.02 |
843.00 |
35.13 |
|
| Rack top drive. | 730 | 22 May |
0.50 |
0.02 |
843.50 |
35.15 |
|
| POOH with drill string and clear seafloor at 1015 h. Rack back BHA. RCJB at rotary table at 1645 h. | 800 | 22 May |
8.75 |
0.36 |
852.25 |
35.51 |
Clear seafloor at 1015 h. |
| Empty RCJB of congealed sepiolite and 4 large rocks (total weight = 8.9 kg; largest rock = 3.9 kg). Unload 3 EXJB of cuttings and a few small metal fragments. | 1645 | 22 May |
1.25 |
0.05 |
853.50 |
35.56 |
End Run 19 at 1645 h. Samples Run19-RCJB, BSJB, EXBJ. |
| Rebuild and make up RCJB and 3 EXJB with a 2-stand BHA and RIH to 1793 mbrf. | 1800 | 22 May |
6.00 |
0.25 |
859.50 |
35.81 |
Start Run 20: RCJB plus 3 EXJB. |
| Repair pneumatic supply lines for drawworks high clutch. | 000 | 23 May |
3.00 |
0.13 |
862.50 |
35.94 |
|
| Resume RIH 1793–2670 mbrf. | 300 | 23 May |
1.25 |
0.05 |
863.75 |
35.99 |
|
| Launch VIT. | 415 | 23 May |
0.50 |
0.02 |
864.25 |
36.01 |
|
| RIH 2670–3640 mbrf. | 445 | 23 May |
1.75 |
0.07 |
866.00 |
36.08 |
|
| Position vessel, space out, and reenter Hole 1256D at 0635 h. | 630 | 23 May |
0.25 |
0.01 |
866.25 |
36.09 |
Reentry 20. |
| RIH to 513.5 mbsf. | 645 | 23 May |
0.75 |
0.03 |
867.00 |
36.13 |
|
| Recover VIT. | 730 | 23 May |
0.50 |
0.02 |
867.50 |
36.15 |
|
| Resume RIH 513.5–1462.9 mbsf. | 800 | 23 May |
1.25 |
0.05 |
868.75 |
36.20 |
|
| Pick up top drive. | 915 | 23 May |
0.50 |
0.02 |
869.25 |
36.22 |
|
| Continue RIH 1462.9–1519.0 mbsf. | 945 | 23 May |
0.75 |
0.03 |
870.00 |
36.25 |
|
| Hard tag at 1519.5 mbsf (tide adjusted). Work external junk baskets. | 1030 | 23 May |
0.25 |
0.01 |
870.25 |
36.26 |
|
| Pump 100 bbl sweep followed by seawater (2× annular volume). | 1045 | 23 May |
1.75 |
0.07 |
872.00 |
36.33 |
|
| Drop stainless steel ball and activate RCJB. Note increase in pressure of 600 psi. Unable to pass hard tag at 1519.0 mbsf with max WOB = 7000 lb and very slow rotation. | 1230 | 23 May |
0.75 |
0.03 |
872.75 |
36.36 |
|
| Pull back in hole with top drive to 1462.9 mbsf. | 1315 | 23 May |
0.75 |
0.03 |
873.50 |
36.40 |
|
| Rack top drive. | 1400 | 23 May |
0.50 |
0.02 |
874.00 |
36.42 |
|
| POOH with drill string to 3042 mbrf. Clear seafloor at 1725 h. | 1430 | 23 May |
4.00 |
0.17 |
878.00 |
36.58 |
Clear seafloor at 1725 h. |
| Slip and cut 115 ft of drilling line. | 1830 | 23 May |
1.50 |
0.06 |
879.50 |
36.65 |
|
| Resume POOH from 3042 to surface. RCJB at the rotary table at 0215 h. | 2000 | 23 May |
6.25 |
0.26 |
885.75 |
36.91 |
|
| Lay out and empty RCJB and 3 EXJB. RCJB contained 3 rocks (total weight = 5.0 kg), one (1.4 kg) is gabbro. The angularity of the rocks indicates fresh deposition with a suspected origin somewhere in the bottommost 7 m of the hole. The external junk baskets contain gravel-sized cuttings to small pebbles. | 215 | 24 May |
2.75 |
0.11 |
888.50 |
37.02 |
End Run 20 at 0215 h. Samples Run20-RCJB, BSJB, EXJB. |
| Make up RCJB and 3 EXJB with 2-stand BHA; RIH to 131 mbrf. | 500 | 24 May |
0.75 |
0.03 |
889.25 |
37.05 |
Start Run 21: RCJB plus 3 EXJB. |
| Service rig. | 545 | 24 May |
0.50 |
0.02 |
889.75 |
37.07 |
|
| Continue RIH 131–2670 mbrf. | 615 | 24 May |
3.25 |
0.14 |
893.00 |
37.21 |
|
| Launch VIT. | 930 | 24 May |
0.50 |
0.02 |
893.50 |
37.23 |
|
| Resume RIH 2670–3640.0 mbrf. Reenter Hole 1256D at 1115 h (Reentry #21). | 1000 | 24 May |
1.25 |
0.05 |
894.75 |
37.28 |
Reentry 21. |
| Continue RIH to 340.9 mbsf. | 1115 | 24 May |
0.75 |
0.03 |
895.50 |
37.31 |
|
| Recover VIT. | 1200 | 24 May |
0.50 |
0.02 |
896.00 |
37.33 |
|
| Resume RIH 340.9–1434.4 mbsf. | 1230 | 24 May |
2.25 |
0.09 |
898.25 |
37.43 |
|
| Pick up top drive. | 1445 | 24 May |
0.50 |
0.02 |
898.75 |
37.45 |
|
| RIH with top drive and minimum pump/rotation. Tag soft fill at 1518.8 mbsf. | 1515 | 24 May |
1.00 |
0.04 |
899.75 |
37.49 |
|
| Wash to 1519.8 mbsf and work junk baskets. | 1615 | 24 May |
0.25 |
0.01 |
900.00 |
37.50 |
|
| Pump 100 bbl of sepiolite sweep mud and chase with 2× annular volume of seawater. | 1630 | 24 May |
1.50 |
0.06 |
901.50 |
37.56 |
|
| Drop stainless steel ball, activate RCJB, and work same. | 1800 | 24 May |
0.75 |
0.03 |
902.25 |
37.59 |
|
| Displace lower portion of annulus with 200 bbl of drill water in preparation for logging. | 1845 | 24 May |
0.75 |
0.03 |
903.00 |
37.63 |
|
| Pull back in hole with top drive to 1462.9 mbsf. | 1930 | 24 May |
0.50 |
0.02 |
903.50 |
37.65 |
|
| Rack top drive. | 2000 | 24 May |
0.50 |
0.02 |
904.00 |
37.67 |
|
| Pull back in hole with drill string to 53.2 mbsf. | 2030 | 24 May |
3.50 |
0.15 |
907.50 |
37.81 |
|
| Repair and replace damaged cam roller on DES. | 000 | 25 May |
1.00 |
0.04 |
908.50 |
37.85 |
|
| Resume POOH from 53.2 mbsf and clear seafloor at 0100 h. | 100 | 25 May |
6.00 |
0.25 |
914.50 |
38.10 |
Clear seafloor at 0100 h. |
| Disassemble and empty RCJB of 4 small cobbles. Empty 3 EXJBs and clean out the usual assortment of cuttings, etc. | 700 | 25 May |
1.25 |
0.05 |
915.75 |
38.16 |
End Run 21 at 0700 h. Samples Run21-RCJB, BSJB, EXJB. |
| Make up Bowen fishing magnet and 3 EXJB; RIH to 109.5 mbrf. | 815 | 25 May |
1.25 |
0.05 |
917.00 |
38.21 |
Start Run 22: fishing magnet plus 3 EXJB. |
| Service rig. | 930 | 25 May |
0.50 |
0.02 |
917.50 |
38.23 |
|
| Resume RIH 109.5–2612 mbrf. | 1000 | 25 May |
4.50 |
0.19 |
922.00 |
38.42 |
|
| Install VIT. | 1430 | 25 May |
0.50 |
0.02 |
922.50 |
38.44 |
|
| Continue RIH 2612–3632 mbrf. | 1500 | 25 May |
1.50 |
0.06 |
924.00 |
38.50 |
|
| Search and position vessel. Reenter Hole 1245D at 1645 h (Reentry #22). | 1630 | 25 May |
0.25 |
0.01 |
924.25 |
38.51 |
Reentry 22. |
| RIH to 427.1 mbsf. | 1645 | 25 May |
1.25 |
0.05 |
925.50 |
38.56 |
|
| Recover VIT. | 1800 | 25 May |
0.50 |
0.02 |
926.00 |
38.58 |
|
| Resume RIH 427.1–1462.6 mbsf. | 1830 | 25 May |
2.50 |
0.10 |
928.50 |
38.69 |
|
| Pick up top drive. | 2100 | 25 May |
0.50 |
0.02 |
929.00 |
38.71 |
|
| RIH with top drive; tag fill at 1519.0 mbsf. | 2130 | 25 May |
0.50 |
0.02 |
929.50 |
38.73 |
|
| Wash to 1520.0 mbsf. Work fishing magnet and junk baskets. | 2200 | 25 May |
0.50 |
0.02 |
930.00 |
38.75 |
|
| Displace lower annulus with 200 bbl of drill water. | 2230 | 25 May |
0.50 |
0.02 |
930.50 |
38.77 |
|
| Pull back with top drive to 1433.8 mbsf. | 2300 | 25 May |
0.75 |
0.03 |
931.25 |
38.80 |
|
| Rack top drive. | 2345 | 25 May |
0.50 |
0.02 |
931.75 |
38.82 |
|
| POOH with drill string and clear seafloor at 0230 h. | 015 | 26 May |
7.75 |
0.32 |
939.50 |
39.15 |
Clear seafloor at 0230 h. |
| Disassemble and empty EXJBs. Fishing magnet contained very little metal debris all of which was finely ground?! | 800 | 26 May |
1.00 |
0.04 |
940.50 |
39.19 |
End Run 22 at 0800 h. Samples Run22-FM, BSJB, EXJB. |
| Make up and deploy logging bit and DC and deploy same to 2923 mbrf. | 900 | 26 May |
6.50 |
0.27 |
947.00 |
39.46 |
Start Run 23: downhole measurements (logging bit). |
| Deploy VIT. | 1530 | 26 May |
0.50 |
0.02 |
947.50 |
39.48 |
|
| RIH drill string to 3638 mbrf. | 1600 | 26 May |
1.25 |
0.05 |
948.75 |
39.53 |
|
| Search and position vessel. Reenter Hole 1256D at 1725 h. | 1715 | 26 May |
0.25 |
0.01 |
949.00 |
39.54 |
Reentry 23. |
| RIH drill string to 203.3 mbsf. Pick up 2 knobbies and set EOP at 218.9 mbsf. | 1730 | 26 May |
1.25 |
0.05 |
950.25 |
39.59 |
|
| Recover VIT. | 1845 | 26 May |
1.25 |
0.05 |
951.50 |
39.65 |
|
| Rig up for logging. | 2000 | 26 May |
0.50 |
0.02 |
952.00 |
39.67 |
|
| Make up Log #1 (triple combo: GR/APS/HLDS/HRLA/GPIT) | 2030 | 26 May |
2.50 |
0.10 |
954.50 |
39.77 |
|
| Deploy Log #1 into the pipe at 2255 h. Reached the bottom of the hole at 1520.0 mbsf. Recover tool at 0700 h. | 2300 | 26 May |
8.00 |
0.33 |
962.50 |
40.10 |
|
| Disassemble triple combo. Make up second log (FMS-sonic). Deploy FMS-sonic into the pipe at 1050 h. | 700 | 27 May |
4.00 |
0.17 |
966.50 |
40.27 |
|
| Tool unable to exit pipe into hole. Recover FMS-sonic at 1410 h. | 1100 | 27 May |
3.25 |
0.14 |
969.75 |
40.41 |
|
| Replace damaged lower centralizer spring and redeploy FMS-sonic at 1500 h. | 1415 | 27 May |
0.75 |
0.03 |
970.50 |
40.44 |
|
| RIH FMS-sonic. Tool appears to jam inside BHA with lower section (~20 m) of unit extending 20 m into open hole. | 1500 | 27 May |
1.50 |
0.06 |
972.00 |
40.50 |
FMS-sonic string jammed in logging bit. |
| Attempt to pump tool clear without success. | 1630 | 27 May |
1.75 |
0.07 |
973.75 |
40.57 |
|
| Make up Kinley cutter assemblies. Drop crimper into pipe at 2135 h. | 1815 | 27 May |
4.50 |
0.19 |
978.25 |
40.76 |
|
| Drop hammer into pipe at 2245 h. | 2245 | 27 May |
0.50 |
0.02 |
978.75 |
40.78 |
|
| Assemble Kinley severing tool and drop into pipe. | 2315 | 27 May |
2.00 |
0.08 |
980.75 |
40.86 |
|
| Drop hammer and server logging cable. | 115 | 28 May |
0.50 |
0.02 |
981.25 |
40.89 |
|
| Recover and tie back logging cable. | 145 | 28 May |
1.75 |
0.07 |
983.00 |
40.96 |
|
| POOH with drill string to 19 mbrf. Clear seafloor at 0425 h. | 330 | 28 May |
6.00 |
0.25 |
989.00 |
41.21 |
Clear seafloor at 0425 h. |
| Release jammed FMS-sonic tool from landing saver sub in BHA. Tool is in good condition. | 930 | 28 May |
2.50 |
0.10 |
991.50 |
41.31 |
End Run 23 at 0930 h. No FMS-sonic, no UBI. |
| Make up RCB 3-stand BHA with new RCB C-9 bit. Check core barrel space out and RIH to 134 mbrf. | 1200 | 28 May |
2.00 |
0.08 |
993.50 |
41.40 |
Start Run 24: Ulterra RCB-9 bit for coring and then cementing. |
| Slip and cut 115 ft of drilling line (#8 of expedition). | 1400 | 28 May |
1.50 |
0.06 |
995.00 |
41.46 |
|
| RIH drill string to 2695 mbrf. | 1530 | 28 May |
5.00 |
0.21 |
1000.00 |
41.67 |
|
| Launch VIT. | 2030 | 28 May |
0.50 |
0.02 |
1000.50 |
41.69 |
|
| RIH drill string to 3638 mbrf. | 2100 | 28 May |
1.25 |
0.05 |
1001.75 |
41.74 |
|
| Search and position vessel. Reenter Hole 1256D at 2225 h (Reentry #24). | 2215 | 28 May |
0.25 |
0.01 |
1002.00 |
41.75 |
Reentry 24. |
| RIH drill string to 1430.5 mbsf. | 2230 | 28 May |
2.75 |
0.11 |
1004.75 |
41.86 |
|
| Recover VIT and coat line on the way out. | 115 | 29 May |
0.75 |
0.03 |
1005.50 |
41.90 |
|
| Pick up top drive and obtain SCR parameters. | 200 | 29 May |
0.50 |
0.02 |
1006.00 |
41.92 |
|
| RIH top drive 1430.5–1520.2 mbsf. | 230 | 29 May |
1.50 |
0.06 |
1007.50 |
41.98 |
|
| Circulate 100 bbl sweep at 1520.0 mbsf. | 400 | 29 May |
1.25 |
0.05 |
1008.75 |
42.03 |
|
| Drop fresh core barrel and rotary core 239R (1520.2–1521.6 mbsf) at average ROP = 0.6 m/h. Average recovery = 36%. No indication of metal in the core barrel. No symptoms of downhole junk in the coring process. Time for coring expires. Prepare for cementing. Circulate 50 bbl sweep at 1521.6 mbsf. | 515 | 29 May |
5.00 |
0.21 |
1013.75 |
42.24 |
Core 239R. |
| RIH coring line to 1510.6 mbsf and coat same on retrieval. | 1015 | 29 May |
1.75 |
0.07 |
1015.50 |
42.31 |
|
| Rack sinker bars and dress for layup period. | 1200 | 29 May |
0.25 |
0.01 |
1015.75 |
42.32 |
|
| Pull back in hole with top drive to 1487.8 mbsf. Rack top drive. | 1215 | 29 May |
1.00 |
0.04 |
1016.75 |
42.36 |
|
| Make up circulating head and pressure test same. Position bit at 1518.6 mbsf. | 1315 | 29 May |
0.50 |
0.02 |
1017.25 |
42.39 |
|
| Mix and pump 15 bbl of 15 ppg cement. | 1345 | 29 May |
0.50 |
0.02 |
1017.75 |
42.41 |
Cement plug 1 (BOH). |
| Displace cement with seawater. | 1415 | 29 May |
0.50 |
0.02 |
1018.25 |
42.43 |
|
| Lay out circulating head and pull back in hole to 1372.6 mbsf. | 1445 | 29 May |
0.50 |
0.02 |
1018.75 |
42.45 |
|
| Flush drill string with 2× annular volumes of seawater. | 1515 | 29 May |
1.00 |
0.04 |
1019.75 |
42.49 |
|
| Pull back with drill string to 940.8 mbsf. | 1615 | 29 May |
1.00 |
0.04 |
1020.75 |
42.53 |
|
| Mix and pump 58 bbl of 15 ppg cement slurry. | 1715 | 29 May |
1.00 |
0.04 |
1021.75 |
42.57 |
Cement plug 2 (910–940 mbsf). |
| Displace cement with seawater. | 1815 | 29 May |
0.50 |
0.02 |
1022.25 |
42.59 |
|
| Pull back with drill string to 739.3 mbsf. | 1845 | 29 May |
0.75 |
0.03 |
1023.00 |
42.63 |
|
| Flush drill string with 2× annular volumes of seawater. | 1930 | 29 May |
0.50 |
0.02 |
1023.50 |
42.65 |
|
| POOH with drill string. Clear top of cone at 2135 h. Disassemble BHA and stow DC in forward tubular racks. | 2000 | 29 May |
12.00 |
0.50 |
1035.50 |
43.15 |
Clear seafloor at 2135 h. End Run 24. |
| Recover beacons and secure vessel for sea. | 800 | 30 May |
3.50 |
0.15 |
1039.00 |
43.29 |
|
| Under way to Balboa, Panama. Advance clock 1 h on 31 May (1200 h). | 1130 | 30 May |
91.50 |
3.81 |
1130.50 |
47.10 |
End of Expedition 335. |
Table based on R. Grout (Operations Superintendent) daily operations reports. Time breakdown is by nearest 0.25 h. BHA = bottom-hole assembly, MBR = mechanical bit release, VIT = vibration-isolated television, RIH = run in hole, WOB = weight on bit, POOH = pull out of hole, IADC = International Association of Drilling Contractors, EXJB = external junk basket, RCB = rotary core barrel, RIS = Rig Instrumentation System, ROP = rate of penetration, TCI = tungsten carbide inserts, DC = drill collar, DP = drill pipe, SCR = slow circulating rate, RCJB = reverse circulation junk basket, TDC = tapered drill collar, FTJB = flow-through junk basket, BSJB = bit sub junk basket, DES = dual-elevator stool on the rig floor, EOP = end of pipe, GR = natural gamma ray logging tool, APS = Accelerator Porosity Sonde, HLDS = Hostile Environment Litho-Density Sonde, HRLA = High-Resolution Laterolog Array, GPIT = General Purpose Inclinometry Tool, FMS-sonic = Formation MicroScanner sonic, UBI = Ultrasonic Borehole Imager, BOH = bottom of hole.
Previous | Close | Next | Top of page