ROV to cut wirerope between DMA and pulling head

This topic has 6 replies, 5 voices, and was last updated 9 years, 11 months ago by Andy Shiers.

Viewing 7 posts - 1 through 7 (of 7 total)

Author

Posts
May 5, 2014 at 3:45 am #6713

Kaka
Participant

Though i know this is common sense, still like to double confirm.

Anyone ever use ROV’s wire cutter to cut wirerope between DMA and pulling head under very high tension?

May 5, 2014 at 1:14 pm #35265

Andy Shiers
Participant

Yes 🙂 ………….. Used a Puma with Hydrolek Disc cutter 🙂
One second it was there ………………. The next ………… Gone 😯

May 5, 2014 at 1:15 pm #35266

Andy Shiers
Participant

That was the reason why they used the ROV instead of Divers although That has been done quite often but not considered safe.

May 6, 2014 at 1:00 pm #35267

James McLauchlan
Participant

Yep! Done that a couple of times. It’s not always the case that you can get the tension off anyway.

May 6, 2014 at 2:04 pm #35268

Savante
Participant

If you were looking for an alternative, go give ray at unique system in denmore road (Aberdeen City, Scotland, UK) a ring.

What might be of use to you is a subsea acoustic shackle. I know from my time there, they had units up to 100Te pull. I think you’ll need to specifically review which ones can just "buzz to release" and which unit will have to be de-tensioned in order to release.

May 6, 2014 at 5:47 pm #35270

T-Boy
Participant

Yes – on more than one occasion without a hitch.

Also used acoustic releases, however dependent on the tension levels, it maybe be safer to kit to just cut ‘n run!

What tension are you at?

May 7, 2014 at 8:50 am #35269

Andy Shiers
Participant

In all my years working out in MiddleEast , The companies out there ( Mainly Non Productive Constant Cock-ups ) Were not willing to put in place an Accoustic Release Shackle as too expensive or the wire was left in situ for over 6 months 😯
Author

Posts