Method for excavating a large diameter shaft into the earth and at least partially through an oil-bearing formation
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United States of America Patent
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Jul 1, 1986
Grant Date -
N/A
app pub date -
Sep 21, 1984
filing date -
Sep 21, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for positioning a large diameter shaft from the surface into the earth and at least partially through a subterranean oil-bearing formation, said method comprising (a) Positioning a central well near the center of a selected shaft location, said central well extending at least partially through said oil-bearing formation; (b) Positioning a plurality of wells at a selected distance outside the diameter of said shaft and about said shaft, said wells extending at least partially through said oil-bearing formation; (c) Injecting a fluid through at least a portion of said wells into said oil-bearing formation to remove oil from said oil-bearing formation; (d) Producing fluids from said central well; (e) Injecting water into said oil-bearing formation through said portion of said wells after the injection of said fluid through said portion of the said wells; (f) Freezing a zone about said location; and, (g) Excavating said shaft.
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