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On the electromechanical systems I used to work with in the oil industry, they were rated for a max working pressure of 20,000psi at the bottom of a borehole full of hot sometimes conductive mud.So you'd fill the motor with non-conductive oil, and have a piston or diaphragm to equalise pressure?
On hydraulically-operated equipment, the downhole motor and pump sat in the hydraulic reservoir, which then had a floating piston with the other side open to the borehole.
Thus the entire hydraulic system was equalised up to the external hydrostatic pressure.
So the hydraulic pump was generating 3000psi *relative to hydrostatic*.
This means there's no pressure differential across the instrument body between inside and out.
They can switch to renewable power, but they hoover up water to use for cooling. Resource use isn't just about energy.
Sam
Mark fucking Harper again.
https://www.theguardian.com/news/article/2024/may/10/uk-floating-bus-stops-cycle-lanes
In London, which has the highest number of floating bus stops in the UK, statistics for 2020-22 showed that of 623 pedestrians injured after being struck by a bike, 0.6% of them – four in all – were hit at floating bus stops. None of these incidents appeared to have happened at a designated crossing point.
Over the same period, 11,400 pedestrians and 15,000 cyclists were injured after being hit by motor vehicles.