I find it hard to understand about the BOP not working, even now..(Remember, I pointed out in the beginning that this device was in place on all underwater oil wells, before anybody even mentioned it failing on this rig)..The reasons I read that it failed was due mostly in part to some battery pack being low...why don't they re-energize this and operate it like it is suppose to work? But surely there is manual valves they can turn to shut it off...I guess I don't know the whole story..
This is what I read (I don't remember exactly where) about two weeks ago. I think part of this came from the Congressional Testimony submitted as part of a hearing. Not sure exactly where, but I'll try and go out and find the source material where I read this:
The BOP had wires and two independent circuits to it that are supposed to be able to trigger the device. Four weeks before the accident, one of the two circuits (Circuit #1) failed. It was documented in a test log, that one entire circuit path was faulty. The platform company wanted to stop drilling and replace the circuit wires. BP overruled them and told them to keep drilling. There was not a rule in place that said both circuits must be working, so BP's order stood.
The faulty circuit #1 was detected during a routine test four weeks before the accident.
During that test, the circuit was energized to test the clamping off ability of the BOP. Circuit #1 had no effect at all- open circuit. Circuit #2 activated as it was supposed to during the test. However, instead of simply squeezing around the pipe, when Circuit #2 was activated, there was a piece of pipe traveling through the BOP at the time, and 14 feet of that pipe moved up and down while the clamping pressure was on. It resulted in some kind of a rubber seal within the BOP being broken up and destroyed. Later that same day (four weeks prior to the accident) large chunks of blank rubber seal were found coming out of the top of the well on board the platform. A guy spotted the chunks of material coming out of the well, along with the fluid that normally is in place, and reported it to the platform operator. However, the BP supervisor on the scene told the person spotting the pieces of rubber seal coming up- "Don't worry about it, we have a well to drill..." That guy reported it to others on the platform, and they recorded it in the well log that large black pieces of rubber had come out.
So, to make a long story short-
The BOP had a bad circuit #1. During testing, circuit #2 was triggered, and broke the seal because there was a pipe inside the well passing through at the time #2 was being tested. BP knew there was a problem, but insisted on keeping drilling, rather than stopping to replace the BOP, because, in part, they were already two weeks or more behind schedule.
Further, when they were cementing at the end, the well failed the cement tests. The company doing the cementing was not happy with the test results, and wanted to reapply more cement to the job. There was reportedly an argument between the cementing engineer, and the BP supervisor. In the end, they either redid the test, or simply accepted the initial test numbers as being suitable despite what the cementing engineer said.