Things we now know from the IADC daily drilling report.
* The mud weight in the hole was 14.0ppg
* The casing was cemented and WOC time was 16.5 hours before pressure testing (This could be the kicker if the cement was not fully set, the added pressure in the casing would have expanded it, and created a micro-annulus in the cement or fracturing it allowing gas and oil to migrate up into the annulus).
* They were working with a 3-1/2” tubing stinger, 817.70ft + 2 crossovers to get it to 6-5/8 DP.
* The balance of the string was 6-5/8” 32# DP to the rig floor
* They did run in and displace the hole and riser to seawater at 8,067ft (3,000ft below seabed)
* They did run and pressure test the casing hanger seal both positive test to 10,000psi and a negative test to 1,400psi. Both were good.
* We now have a stack layout drawing, showing ram arrangements.
* The casing was 9-7/8” 62.8# which is 5/8” wall and 8-5/8” ID
* The 7” properties are still unknown.
BP email on ops: