This is all extremely technical and will not be to most reader’s taste. However there is some take home information.
1 Apparently the well has failed a few thousands of feet down. That appears to be the explanation for their actions that otherwise would not make sense at all.
2 We can anticipate a possible complete well collapse though erosion effects appear overstated here.
3 This means that the only method is the relief wells themselves and that is two months out. These wells will or should divert a lot of the available oil and possibly allow the runaway to be somehow dealt with.
4 The president of BP should be charged with criminal negligence as the apparent behavior spells out. Inflexible orders to speed up drilling overriding the supervisor’s best judgment are betting the company for nothing except ego.
Also all the engineers who signed off on this behavior should also be fired for cause, if only to remind the industry that there are higher obligations than a bosses’ whim that kills.
Top BP Blowout News of the Past Few Days
When a well is “Killed” using this method heavy drill fluid “Mud” is pumped at high volume and pressure into a leaking well. The leaks are “behind” the point of access where the mud is fired in, in this case the “choke and Kill lines” which are at the very bottom of the BOP (Blow Out Preventer)
[Note: it was easy to find a sourced copy of that quote, let's not get carried away with conspiracy thinking when it's not needed:]
2. Influx is circulated during cement job to wellhead and BOP.
3. 9-7/8” casing hanger packoff set and positively tested to 6500 psi.
4. After 16.5 hours waiting on cement, a negative test performed on wellbore below BOP. (~ 1400 psi differential pressure on 9-7/8” casing hanger packoff and ~ 2350 psi on double valve float collar)
6. Hydrocarbon below BOP is unknowingly circulated to surface while finishing displacing the riser.
Confidential. BP. What Could Have Happened
Further Discussion on Technical Components of this Question at theOilDrum.com
You have 36" conductor(drive) pipe set to 320+ ft below mudline. Traditionally, these are driven down, banged on (it's loud) until you can't bang on them any more.
Next you have the 28" casing (surface pipe) that is set in this case to around 1200' +/- below mudline.
You then have the 22" casing that is set about 2900' +/- below mudline. I believe this is the pipe that most likely supports the bulk of the weight of the BOP stack.
The 18" is a liner that's hung off of the 22" stack, I think. The base of the 18" is nearly 4000' below mudline. I don't know where the top of the 18" liner casing is, but let's say 250' above the base of the casing it was hung on, or about 2700' below mudline.
Then the 16" is run to the base of the BOP stack. The base of the 16" is 6860' below mudline.
cudBwrong on June 13, 2010 – 3:45pm Permalink | Subthread | Parent | Parent subthread | Comments top
R2-3D on June 13, 2010 – 4:56pm Permalink | Subthread | Parent | Parent subthread | Comments top