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Table T19. Event summary for leak-off tests. (See table notes.)

Time
(h)
Event
2325 Flush line, replace seawater by mud, pressure test line.
0148 End of test of kill line at 1000 psi. The test is ~0.4 bbl. Bleed off at 0155 h. Data being recorded.
0158 Reset cumulative volume and zero of pumping rate.
0200 Pressure test of the line. Pressure set at 1300 psi and kept 5 min. Stop and bleed off.
0215 Pump tank at Level 2 (20 cm below brim of the tank).
0201 Reset the cumulative volume and zero of pumping rate.
0220 Start LOT 1. Initial pressure = 44 psi (attributed to hydrostatic load: pipe manifold is above pump). Flow rate = 0.25 bbl/min. LOP = ~105 psi.
0230 Shut in (after sudden drop of pressure?).
0245 Bleed-off after only 15 min because pressure is stable.
0204   Pump tank level at 1.5.
Flow-back in the BOP. Mud seen in moonpool. Perhaps due to BOP leak at seafloor. 2nd leak-off test is planned.
0306 Both mud tanks filled to the brim.
0309 Pressure test of line. Pressure stays at 272 psi.
0322 Start LOT 2. Initial pressure = 42 psi. Rate 0.25 bbl/min. Leak pressure = 100 psi.
0337 Shut in.
0352 Bleed off. 3.5 bbl did not return.

Notes: Summary compiled by scientists on location and from daily drilling report. LOT = leak-off test, LOP = leak-off pressure. BOP = blowout preventer.

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