October 14, 2012 David Bull (@davidnbull) lockerz.com/s/252996863 New borehole being drilled with UNICEF funding.
(Click here for another artist's work using the actual Marcellus Shale being drilled and fractured for natural gas).
As long as the hydrostatic pressure of the column of mud exceeds the pressure in the formation being drilled, the well remains under control.
Work on a shaft being drilled down into the mine to test air quality was progressing, Mr. Knowles said, and could be completed overnight.
He added that the area being drilled was "as much ours as the centre of Buenos Aires.
Percussion cables work like pile drivers, with bit or tool moving up and down on a cable to pulverize the ground being drilled into.
No new wells are being drilled here.
Two wells are being drilled -- one as a backup.
These days, many little fingers are being drilled.
Monitoring wells are also being drilled to detect contamination.
Rather than being drilled and tested on reproducing passages from textbooks, students write their own stories.
