[QUOTE=JDrill;31646]After reading this thread for the last few days I have been impressed with the knowledge (TMS’s, downflood angle, spotting flames from diverter overboard line) and accuracy of some posters but disappionted by some of the “noise” especially inaccurate lists of names.
Assuming they were P&A or T&Aing these questions may need to be answered.
- If they ran in to the shoe to set cement plugs why not run and mechanical (EZSV)
- Was the first cement plug tested to a pressure above formation break down
- Was the first cement plug weight tested by drillstring (not density see below)
- Why does the industry use cement plugs…we all know their rate of success.see Montara
For information about PA and TA and barrier policy see Montara enquiry (Australia Government) 1st 4 days of evidence.
1 The ROV picture of pipe with oil leak is drillpipe - It looks like they were displacing riser thro DP
- How was volume in and out being monitored? I would suggest that the pumps were on direct feed as the pits would be filling with return mud from the riser hence no real volume accounting.
I would suggest a scenerio of - Lower plug pumped - no tested properly
- Cement did not set up
- Cement goes to seawater gradient as it is gelling (cause of many jack up annulus blowouts)
- Mud displaced from riser with seawater (removal of riser margin)
- Well kicks due to loss of BHP in points 3 and 4.
We all know and are trained the “hold the Tiger by the Tail” but sometimes we are “Lions being Lead by Donkeys”[/QUOTE]
Exactly the scenario I envision…
But at some point the button should have been pushed. Why did the BOP not catch it???
I am a SSE for another company, and very, very interested to hear the whole story.