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The line is opened at the<br />
same moment the working<br />
sealing element is closed.<br />
It is important because failing<br />
to do so it is possible to<br />
fracture shallow rocks and the<br />
gas or high pressure fluid can<br />
rupture to the surface near or<br />
far from the rig un<strong>control</strong>led.<br />
That is especially dangerous<br />
off-shore when using the<br />
platform that is standing on<br />
the see-bottom on the legs,<br />
because the material can be<br />
washed over below one leg,<br />
and the platform can turn<br />
over.
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