posted on Jun, 7 2010 @ 10:39 PM
Wow.. can't believe you work at home rocket scientists can't even put two and two together. If you had read this post
billyjack's Petroleum Engineer's Description of the Blowout
, then you could get an
understanding of this disaster and what apparently is now a vindicated and truthful post. Maybe some data may be imperfect, but if you compare what
he has decribed and what BP has presented, they match up pretty damn well. The data presented in the BP document is confusing but they did start
experiecing unexplainable rises in pressure in many of the test probes throught the well in the final hours and the final and disasterdly mistake
appears in the last line in the document just as billyjack described.
At the time of the incident driling fluid was being displaced from the well with seawater in preparation for setting the final cement plug
If you read billyjack's post, you will see he described in perfectly and in my opinion deserves some major credit.
When the rig sank the riser was still attached to the wellhead and fell over & split in a reported 3 places. It w as reported that 16.5 #/gallon
drilling mud was in the riser and the well blew out when it was replaced with seawater. To understand the physics I will try to explain hydrostatic
head. The pressure created from a column of fluid in an oil well is identical to the reason you have water pressure out of the tap at the kitchen
sink. Water which weighs 8.33 #/gallon is put into a water tower 100’ up in the air. Fresh water has a hydrostatic head equal to .433 psi per foot
of height. Therefore you get 43.3 psi at your shower head. If water weighed 16 #/gallon then you would have 86.6 psi in the shower.
Similarly as an oil well is drilled there is a fluid known as “drilling mud” that is pumped into the drillpipe, through the drillbit & circulated
back to the surface where it is screened to remove the soil dug out of the well. This “mud” is carefully monitored to make sure that if encounters
oil or gas it is heavy enough to keep it from flowing into the wellbore. The well in question had to have 16.5 #/gallon mud weight to keep the oil &
gas from flowing. The hydrostatic head of the mud of this weight as opposed to fresh water is .86 psi/ft. This means that the pressure in the oil
reservoir encountered must be nearly 20,000 psi. ((18,000 + 5000) X .86). As the oil replaced the column of mud that would offset this bottomhole
pressure it began flowing faster & faster into the annulus with more & more force as the weight of the 23,000 foot column of fluid became lighter &
lighter. When the “company man” (the BP guy in charge) removed 16.5 #/gallon mud from the riser with 8.4 #.gallon sea water he immediately reduced
the hydrostatic pressure 2000 psi & it was over.
If you also take into consideration the # values he was talking about concering the PSI of the gushing oil and gas, the valves and the failsafe
measures were not addequate according to the BP document describing their failsafe measures and their max loads.
So if your looking for an explanation of this document and what it is really telling you, then look to the above referenced ATS link and compare it to
billyjack's take on the situation.
Also, been watching the web cams for sometime now, anyone really seeing any changes from when they started this new "operation
ap" procedure ? Looks like just as much is coming out since they cut the pipe to increase the flow 20%. LOL now they say they
are getting maybe around 10%-20% of the new increased flow... do the math.