I really don’t know, but recently observed a job video report where the crew had so few components to rig something together that the vehicle went down with a fishtail-connected to a cut-down shifter and a 4" bolt tie-wrapped in place. Vehicle was recovered to deck from 300m deep each time to put a new bolt in. Lots of time spent, 8mins down, 8 mins up, pissing around to find the work site, setting up, waiting for visibility……… Take two ends of a spool piece and you’ve got quite a bit of time involved.
Maybe these guys could have magnetised the wrench, put it in a holster and then inserted a new bolt each time at depth, but I think it was a last minute addition to their task plans and they were rushed….. there are good and effective low technology solutions to doing this!! Their method worked fine. However if you were working bad weather conditions, you might have a problem recovering and launching within weather windows. Better to get in once, and then stay down till the whole job is complete.
maybe it’s not such a good research project, but you need to start thinking about where time is wasted and god, dare I say it, "VALUE ADDED!" and de-risking seemingly trivial tasks…..
at the end of the day, job was done, but I am sure it could have been done faster and with less exposure to weather conditions if it had been thought through carefully by an engineer. I only suggest this as if you wanted to spend time looking at controls and feedback loops, you could make this project as complicated as you wish….
Final word though….
KISS (Keep it simple stupid !!)
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