reply to post by DancedWithWolves
HI DancedWithWolves, hi everyone, just like to confirm that the "arm" you've pointed out in your posted image is simply part of the riser adapter
that is mounted on top of the BOP. It's been there all along. Can't blame you for wondering about it, though.
You can get a technical drawing of the BOP here
. I posted this
in my last video post a couple of pages back but I'm giving it again for anyone who might have missed it. (It was pretty early morning still in the
US when I did that post.)
Another poster asked about the level indicator and yet another posted a reply, giving a pretty fair explanation. I'd just like to add a little to it,
because while it works in some ways like a spirit level it's constructed a bit differently.
In the posted image that shows the circular tilt gauge, the part of the device with the concentric circles painted on it seems to be shaped like a
shallow bowl. This would make sense if they use a steel ball as the indicator. If the gauge is dead level, then the ball will sit in the middle of the
bowl. However, if there is tilt in any direction this alters the horizontal plane and the ball rolls towards the lowest point.
The advantage of using this "bowl" is that while most builder's-type spirit levels only show the level in a single plane (direction), this one
shows tilt in any direction from vertical. By drawing through from the center of the ball through the middle of the bowl (the bull's eye if you
like), you can determine the precise direction of tilt. (This would have been vitally important for checking the BOP's verticality when it was being
However, the disadvantage of the design of this gauge is that it only allows for a relatively small amount of tilt, and it was some days ago that the
I'm right and it's a ball!) had rolled as far from the center as it could. That's where it's apparently stayed ever since. Even if
the BOP tilts further, the ball won't show it. If the balls rolls around to another position on the edge, then it just means the direction of tilt
has changed. But that won't tell how much more the tilt is (if it is
Current feeds: if you're watching Enterprise ROV 2 right now you'll see that the LMRP cap is badly obscured. About three hours ago things were a lot
quieter and the top of the cap and most of its side were clearly visible. I was hoping this meant that either they'd increased the capture rate
somehow, or else the flow rate had dropped.
It looks like it was the flow rate, because after a while things got violent again and it's been more-or-less like now since then. Perhaps some
debris lodged in the well down-hole and partly blocked it for a little while. (The fact is we don't really know so I'm just offering a perspective.)
Then the debris either got blown out or the gusher eroded around the blockage and the flow came back to what we now could call "normal".
The only other alternative I can think of is that there is great variation in pressure/flow from the reservoir itself, and I don't have data on how
usual/unusual such a situation would be with a known high-pressure well.
Anyway I have to head off to work for a while now, but just wanted to post a few observations and send greetings to you all.
, please U2U me again, could you please? Pushed for time, I can't reply right away but if I have more details of what your
concern was then that would be very helpful.
[edit on 29/6/10 by JustMike]