Thread: Post any pic anytime as many as u like

Originally Posted by NamPikToot

Never figured Tom for a hairy arsed rigger

...*cough* you're confusing the predator with the prey...

Originally Posted by OhOh

I worked at Heerema in London, many eras ago.

They just built the worlds biggest - https://www.offshoreenergytoday.com/...sel-completed/

Originally Posted by OhOh

I also created 3D models and documentation of many AMOCO North Sea platforms.

Interesting, I was on the Montrose field operated by Amoco in the mid seventies, a lifetime ago!

Imagine the biggest difference with the new Crane crane barges, apart from more capacity is that they will be fitted with DP3. There will be a lot of decommissioning work coming up worldwide in future, going to be huge business for some.

Originally Posted by Airportwo

I was on the Montrose field operated by Amoco in the mid seventies

Were you involved with the divers or know what type of procedures they used?

Originally Posted by Airportwo

they will be fitted with DP3

DP3 is?

^ Not directly involved with divers, from what I remember, it was all "sat" diving back then, divers became largely redundant in recent years as ROV became more efficient.

DP3 - Marine Technologies, LLC: Bridge Mate Dynamic Positioning: DP 3 will make staying on location easy and add ease of manoeuvring with a load, self propelled also.

The DP (dynamic positioning) systems are levels of certification.

Most vessels I work on are DP2. This has a certain level of redundancy to allow us to use ROVs within platform 500m safety zones. I worked on a DP3 vessel once, used for well intervention. That vessel had a second bridge (amongst other things) in case the main one was taken out by fire. I imagine all sat diving vessels would now be DP3, lay vessels and the the heavy lift barges you mentioned above. The days of lay barges using an array of anchor handlers are pretty much over with satellite navigation now so good and such advanced DP systems.

Merville Battery Museum

Suction anchors for the refurbished Njord A semi-submersible production platform, northern Norway. They get big seas in this part of the world.

^Pray tell how they work.

Meanwhile some Southern Chinese fashion;







Illustrating female appearance similarities to northern Thai women and fashion apparel.

Performed CPR to no avail. :/

Originally Posted by OhOh

^Pray tell how they work.

Very simple and very clever, like any great design.

The suction anchor is basically a hollow cylinder, open at the bottom and closed at the top. It's lowered down to the seabed, the water is pumped out using an ROV to create negative pressure, and the weight of a few hundred metres of seawater does the rest. So long as you have a suitable seabed - clay - they are going nowhere.

The best view you will ever get from any boat, anywhere....

The gangway when you're leaving.

Next stop.... Sukhumvit!

Hey Mendip, Do you ever have trouble extracting those suction anchors ? I understand that you would simply reverse the process and pump air in to cause it to rise out, but what happens if that air find a passage out one

side, creates a channel, and just bubbles up continuously ? Do you ever lose them permanently ? Or is the body made of concrete with a top which somehow detaches ?

That's a bit outside my area, but these anchors would generally be deployed once and left in place to anchor a permanent structure.

If one was to be recovered... first it's water that's pumped out to create the negative pressure and suction, not air. I would imagine so long as the seal is broken at the top of an anchor the suction would be lost. Then recovery would just be a matter of using a powerful enough crane to drag it out of the seabed.

Originally Posted by Mendip

The best view you will ever get from any boat, anywhere....

The gangway when you're leaving.

Next stop.... Sukhumvit!

Great stuff Mendip. Enjoy it bud.

Originally Posted by Mendip

Very simple and very clever, like any great design.

Thanks.

southern LOS

Originally Posted by Mendip

If one was to be recovered... first it's water that's pumped out to create the negative pressure and suction, not air. I would imagine so long as the seal is broken at the top of an anchor the suction would be lost. Then recovery would just be a matter of using a powerful enough crane to drag it out of the seabed.

Clever design.

I would think keeping the seal intact and pumping seawater back in using the same ROV might be enough to lift one back out of the mud if it needed to be recovered.

Not necessarily.

What happens if that water finds a passage out somewhere, creating a channel, and just flows out that channel continuously ?

Blowing is different physics from sucking

Originally Posted by Latindancer

Blowing is different physics from sucking

...let me guess: you're here all week...