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Old 05-15-2011, 09:22 AM   #1033
SSE 4 2SS
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Here are a couple more pics from my work area and another project I just took on...

The first one is a picture of the stack taken yesterday... Again, we are getting it ready for painting... It takes a little bit of prep time... The stack weighs around a half million pounds... It looks big in the pictures, but nothing does justice quite like standing next to it, crawling up on it, or even more so, working underneath it when we are moving if forward to land it on the skid beams as we are preparing to run it...

We use two gantry cranes to move it... and no matter how many times you work under it, you never quite get used to it, and certainly never get comfortable with it... The gantry cranes have a 7/8" cable, running through a ten block system... collectively they will pick the stack up and move it... Either by themselves will not, so,.....

The second picture is looking forward in the cellar deck... This is my primary area of work... I have equipment up around and on the drill floor area, the tensioners, the drill string complicator... ooops, the Compensator, but I'll post that stuff later... Here in the cellar deck is where all the big heavy work of rebuilding the stack is done... The big white piece at the forward end on the cellar deck is the LMRP, Lower Marine Riser Package... This gets picked up and set on top of the stack when we are preparing to run it... This is where all of the hydraulic controls are for the LMRP and the stack... We have the capability subsea of latching this piece in or unlatching it... The primary reason to unlatch would be an emergency, where we need to move the rig away from the well... Shallow gas blowout, or if something goes wrong with the controls and we need to recover the LMRP for repairs... We seperate this part and raise it to the surface... a several day job, and make needed repairs and then lower it back down, another couple of days, and relatch it to the BOP stack and go back to work...

The long cable laying on the deck to the left side of the photo are tensioner cables... These will hook to the slip joint... Remember, the rig floats... therefore it heaves and rolls and moves in all directions... but the stack and the riser are hooked to the sea floor.. Like a straw, the top of the riser string will move laterally, but not vertically, so we have a slip joint to allow for rig movement up and down.... If we move too far in one direction, we effectively also change the length of the string, so this compensates for that added length until we can correct the problem...

We pay close attention to the angle of the marine riser... If it is leaning, the rotating drill pipe in it will rub against it to the point of eventually wearing a hole in the side of the riser or the stack... This would be a huge problem....

The next two pictures are of a self contained hydraulic system used as a back up for operating the sea chests valves in the lower hull... There are two of them... both in the lower hull pump rooms... (port and starboard, or left and right for the land lubbers... these sit just about the bilge level, so they end up looking like hammered hell in no time at all... I am rebuilding this one for the Marine Dept... I'll try to remember to post a couple of pics of it when I'm finished... I promise you wont recognize it...

Port and left both have four letters... One of the nine thousand ways to remember the difference... It's like a foreign language... We don't even have to think about it, once you learn the language, you find yourself thinking in marine terminology... No one goes to the front of the rig...or the left side... bow, aft, port, starboard... athwart... etc...
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