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Subsea pig launcher

March 4th, 2007 (09:25 pm)
current mood: si

A while ago (probably while updating my résumé last November), I went searching for my patents so I could reference them. I just searched for "Stracke", and found one issued to a Peter Stracke in Houston. It's a patent for a subsea pig launcher. The abstract says:

A subsea pig launcher, that can launch either 1 or more pipeline pigs simultaneously. The pig launcher can be assembled on a subseas production pipeline with the aid of an ROV. In the preferred embodiment, the pigs are connected to each other and spaced apart by a spine. The pig launcher is configured to capture the next pig to be launched in such a manner that the spine behind it is in alignment with a shearing valve; for example, coiled tubing or wireline. Sequential valve operation shears the spine and applies pressure behind the pig to launch it from the launcher past the pig detector and onto a platform for recapture.

Now, I'm pretty sure that this is "pig" as in "unformed chunk of metal", not "barnyard animal"...but why let facts get in the way? I think it's a lovely image.


Posted by: C. Virtue (cvirtue)
Posted at: March 5th, 2007 02:28 am (UTC)
Mad Science

n alignment with a shearing valve

And naked pigs apparently, after shearing!

Posted by: JT (learnteach)
Posted at: March 5th, 2007 03:40 pm (UTC)

Pipeline Internal G (um....something.) It's a rubber balloon, ribbed, looks something like those plastic yellow barrels protecting California offramps, that is used to clean clingy sealife out of saltwater pipes. Monterey Bay Aquarium has a great video of one in use, http://www.mbayaq.org/video/video_popup_pigging.asp

Posted by: Who, me? (metageek)
Posted at: March 6th, 2007 02:55 pm (UTC)
Re: Nope.

That does make more sense; I didn't think there was a whole lot of undersea mining out there.

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