Результаты (
английский) 1:
[копия]Скопировано!
inside the Drillstring is constantly circulating drilling mud that goes through the special holes in the bit, providing lubrication at drilling on the rocks. drilling mud, containing behind the breed (sludge) is brought to the surface through the zone between the drill string and borehole wall column. There she is cleared of sludge, gas, processed and pumped into the well again
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