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Βιβλία Βιβλία 1 - 1 από 1 για Then as the slight excess of fluid in the immediate vicinity of the hole drains,....
" Then as the slight excess of fluid in the immediate vicinity of the hole drains, and an equilibrium is established, the output gradually shrinks to the level of the old wells in the pool. The wells at Triumph are from 600 to 800 feet deep, and usually... "
Report of Progress ... - Σελίδα 13
των Pennsylvania. Geological Survey, 2d, Pennsylvania. Board of Commissioners for the Second Geological Survey - 1800
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Sessional Papers - Legislature of the Province of Ontario, Τόμος 7

Ontario. Legislative Assembly - 1892
...and usually have only from 200 to 250 feet of casing in them, consequently some four or five hundred of the bore hole is bare rock, equally exposed to...the oil rock itself. In this uncased portion of the wall are the first and second sands, which also outcrop in the river hills within two miles of the...




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