Underwater pipe and pile cutter - GIF

Underwater pipe and pile cutter.

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Previously:

https://www.homemadetools.net/forum/...597#post162793
https://www.homemadetools.net/forum/...774#post133170
https://www.homemadetools.net/forum/...363#post154504
https://www.homemadetools.net/forum/...950#post148884
https://www.homemadetools.net/forum/...703#post147883
https://www.homemadetools.net/forum/...550#post132368

How does it get there? This is just the cutter attached to a much bigger system. What holds this cutter?

I can think of so many things to go wrong with this idea. How about jamming for one.

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Originally Posted by mwmkravchenko

I can think of so many things to go wrong with this idea. How about jamming for one.

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Exactly. Like 1" from the edge. Every. Single. Time. I'm sure there's a reason that the sample video is being cut vertically.

Diver in the water. With the proper guards I would have welcomed one of those things. Having used an underwater cutting torch using hydrogen & oxygen with compressed air to create an air bubble to protect the flame, a sudden current could force you to move the torch at the wrong time changing the angle you were holding it moving you off your cut or worst yet cause you to lose the air bubble extinguishing the flame. You would know it immediately by the concussion of the flame making a boom as it went out. making you surface to relight it. lighting it under water was not a good option as the boom from the hydrogen oxygen and compressed air could bust your ear drums.
Another bad thing is it is almost impossible to even see the flame when burning hydrogen. At least if you were cutting at a depth of 10 feet or less you could use acetylene

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What have I never mentioned ROVs,
You know I built one, ok I can hear you all yawning.

Yep these vehicles are the subsea vehicle of choice, just like divers they are hard maintenance and still complain but at least with divers on board the fridge is full of ice creams/cans of goffas and the fruit bowls are full of bananas. Energy food you undrstand. Not for ROV operators, yeah right.

Frank

what was that explosive cord, that used to make easy work of stuff. That and blowing the thing up.
worked on a couple of projects where we removed old well structures with explosives, putting them in place with the ROV.
sounds like fun but the vessel moved off 6 miles, where is the fun in that - we hardly saw or heard anything.

On a side note the Berirut explosion, bloody hell. I have seen some big bangs in my time but holy crap (i do intentionally say that with biblical reference) that was like Hiroshima. Which again is also especially significant as we have just had VJ day.

Risers, the product tube extending from the seabed tend to be vertical, you can get jumpers which link well heads and manifolds which will be horizontal but they tend to be dissasembled the same way they were constructed when they were installed.
Risers are basically a tube inside tube (to use the propper term - pipe) a well will be drilled to a depth of say 50m at 26" diameter and a casing installed. cement will be pumped into the casing forcing the cement up the outside and bonding it into the hole. A new hole is drilled down the inside of the casing say 20" it is then also pumped with cement which again fills the gap between the casings. However the second casing might be 100m long. This operation is carried out 3 or 4 times ending up with a 10" hole/pipe 300m long. punching through is when the drill bit extends beyond the casings and into the well. The demonstration is a little bit of poetic licence, as you can see there would be quite a mass of steel to cut through. Id suspect that this equipment would have been deployed in the Gulf of Mexico cleanup and Deepwater Horizon especially. They work pretty well, its just a miniture version of Smit's big saw they used to cut up and recover the Costa Concordia.

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And what it really looks like - in clear water obviously

Attachment 36427

Smit are the boys, there expertise and sheer size of recovery is unbeleivable, they are taking heavy lift cranes to sea which would dwarf most land based cranes. The sea is not exactly a stable work platform and tends to be a bit spongy when you push weight down on it.

Quote:

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Originally Posted by MeJasonT

Frank

what was that explosive cord, that used to make easy work of stuff. That and blowing the thing up.
worked on a couple of projects where we removed old well structures with explosives, putting them in place with the ROV.
sounds like fun but the vessel moved off 6 miles, where is the fun in that - we hardly saw or heard anything.

On a side note the Berirut explosion, bloody hell. I have seen some big bangs in my time but holy crap (i do intentionally say that with biblical reference) that was like Hiroshima. Which again is also especially significant as we have just had VJ day.

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its called det.cord or primer cord. it is a plastic tube filled with pentaerythritol tetranitrate (PETN, pentrite).

det cord thats the one. cordite

Apparently it was used to deliberately bring down the twin towers acording to cospiracy theorists.
one civil engineer made a film using slowmo footage of the tower collapse showing sequential minor detinations.

The super heated aluminium hitting water idea works for me to a certaing point - yes i have welded a few end mills in Alu.

This then takes my mind to the next snippet , ok its steering away from subsea tooling for a second

The scary bit is we have a section of a 747 in the science museum in London its 2 rings of the body about 10 inches apart with a criss crossing diaganal spar section.
you could snap this stuff with your hands - It is no suprise that the planes didnt make it all the way through the towers.

This isnt the london section but

Attachment 36434
Attachment 36435

just to put it into perspective this is a plane taking off at heathrow

Attachment 36436

and things like this should never happen

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Lockerbie is only 15 miles from my home, I was about 3 miles from this site (on the A74) on the night offering assistance with my then employer. he used to install car phones and they were desperate for establishing communications during the incident.

There is a strange detail about the incident, one of the passengers died by drowning, dispite being in an explosion and falling hundreds of feet the cause of death was noted as drowning - they had ended up in a peat bog and drowned.

They have been cutting granite tomb stones for years like this. Diamond or Carborundum slurry with a twisted blade. By the way, Frank, I'll bet you even have a black belt in Karate. Am I right?

Quote:

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Originally Posted by owen moore

They have been cutting granite tomb stones for years like this. Diamond or Carborundum slurry with a twisted blade. By the way, Frank, I'll bet you even have a black belt in Karate. Am I right?

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No I never put much stock in the martial arts a half crazed street fighter can defeat most who are trained in one form or another The Russian Systema would be about the only guarantee to be able to overpower a crazed fighter most every time. So my philosophy is why bother bringing a fist or a foot to a gun fight shoot first and shoot often

That a boy Frank lol

Man after my own heart
I do think Exocet takes some beating though, just take out the whole fight. Like swatting fly's with an atom bomb.

Im reading "how to win friends and influence people" man what an intense book (its audio 7 Hrs and 20 mins). I gained a great deal from it, get on with somthing else and better spend ones time. Its a bit colonial at the start. But Positive thinking, so no more Mr nasty grumpy guy from me.
Still to follow on from my last very positive comment. round em up, shoot them all and let god sort them out. This is of course positive, i did not insinuate that the devil should sort them out. See the books working already, just another 5 hours to go.

Back on topic
I started my offshore career on this project

https://www.offshore-mag.com/subsea/...ine-connectors

when i find some images i will add them, a really impressive piece of kit.

A guy on our team was into electronics and building all sorts of gadgets, I cant remember the guys name for the life of me.
He was currently working on fitting hand controls to his cars steering wheel - A very influential person in what was to be my future development (Tony ?)

The engineer in charge of the DMaC was Duggie Duncan
I upset him by being young and stupid and pointing out that his baby was not built to spec. They had fitted rams and the grease nipples on the knuckles were underneath, the knuckle has housed back in a section of angle - not a cat in hell's chance of greasing the knuckles. That started my perfectionist attitude towards other engineering blunders. A skill STEM will never teach, in order to be a damn good engineer you need years of exposure to all its disciplines.

I did manage to pull up Fugro management once. In the project documentation of a Fugro project there was around 20 big A4 folders covering all aspects of the subsea project we were about to commence. There was a pre project meeting and they went through the files and all aspects of what we were going to do. The critical factor was the weather/working limits. Some squeeky gobby little git couldnt hold it in any more and had to point out that the whole section on weather limits was missing from the files. Hey i dont need a degree to be this anal. Incidently this is when i realised the difference between a clever degree and one handed out on a toffee paper.

Quote:

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Originally Posted by MeJasonT

Im reading "how to win friends and influence people" man what an intense book (its audio 7 Hrs and 20 mins). I gained a great deal from it, get on with somthing else and better spend ones time. Its a bit colonial at the start. But Positive thinking, so no more Mr nasty grumpy guy from me.
Still to follow on from my last very positive comment. round em up, shoot them all and let god sort them out. This is of course positive, i did not insinuate that the devil should sort them out. See the books working already, just another 5 hours to go.

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I've always had the saying kill-em all but the 9 1 gravedigger 1 mortician 1 padre and 6 paul bearers, and a war is never over until there is only 1 left on the opposite side to record it.

Quote:

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Originally Posted by MeJasonT

Back on topic
I started my offshore career on this project

https://www.offshore-mag.com/subsea/...ine-connectors

That started my perfectionist attitude towards other engineering blunders. A skill STEM will never teach, in order to be a damn good engineer you need years of exposure to all its disciplines.

I did manage to pull up Fugro management once. In the project documentation of a Fugro project there was around 20 big A4 folders covering all aspects of the subsea project we were about to commence. There was a pre project meeting and they went through the files and all aspects of what we were going to do. The critical factor was the weather/working limits. Some squeeky gobby little git couldnt hold it in any more and had to point out that the whole section on weather limits was missing from the files. Hey i dont need a degree to be this anal. Incidently this is when i realised the difference between a clever degree and one handed out on a toffee paper.

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That reminds me of when we were having a pre project conflab to access whos company was going to cover which scope of the project on a 120,000 cubic meter cold storage building. For the most part I sat that mostly disinterested in the whole meeting Since there were representatives and engineers from several countries English was always the preferred language for these conferences. As we slowly scrolled through the many construction phases I kept my mouth shut through the civil work and the faults I thought I noticed then held my tongue through the steel structure since I knew our company was not at the time in position to produce the amount of steel fabrication required so on and on the meeting went through the many phases until we got to the part I knew my company was vying to compete for my company's owner and our other engineers hadn't spoken up about the many discrepancies in the plans do when they started talking about adding standard sized walk through doors way up 10 meters from the floor for access to the refrigeration and circulation units and no one from any company had brought up the fault with this I finally had enough
Now we have a problem I said. I have sat here for 4 hours trying to wait and see if any of you engineers and professionals in your fields were ever going to say something about all of the design flaws in your little project. I never spoke out during the discussion of the civil work even though this building will eventually leach cold into the ground until it becomes cold soaked Our water table in this area is but a few meters below the surface over time if your approved design is allowed to stand the moisture in the ground will freeze and cause the ground to heave I cited an instance of this in Sweden. I held back while the structure was being argued even though you are dead set on making this to be a single building you have the structure figured as 3 separate unites tied together only with the interior cold panels and yet the roofs are laid out more of a 2 building not 3 building configuration, you show the cold panels as being 2 150mm thick by 6 meter long panels stacked one on top of the other to achieve the 12 meter height when I know where I can have 12 meter long panels made, and 200 mm thick would be far more efficient,every joint in panels is a potential cold leak. But the point I am bringing up right now is your proposal of doors to nowhere and their size you have them placed too far away from the units for a technician to service or replace them and no provisions for work platforms or safety railings also their size makes them stupidly expensive for no more than they will ever be utilized.
The Dutch consulting engineer asked me, I replied in my poor German, industrail Design Engineering meine Lehre ist die Philosophie der Technik
One of the Arab engineers asked what had been said the Consultant said I asked him what his field was
from then on I was called the big engineer and the whole set of plans were gone over again and again until over a Million dollars worth of waste was discovered and corrected, it took me finally speaking out to cause the others to grow a pair and our company wound up with many more aspects of the project than we had set out to bid for.

Tops.
stick it to em.