Method for isolating two aquifers in a single borehole

Patent · Fri Jan 20 04:00:00 EST 1984

OSTI ID:6381101

Burklund, P W

A method for isolating and individually instrumenting separate aquifers within a single borehole is disclosed. A borehole is first drilled from the ground surface, through an upper aquifer, and into a separating confining bed. A casing, having upper and lower sections separated by a coupling collar, is lowered into the borehole. The borehole is grouted in the vicinity of the lower section of the casing. A borehole is then drilled through the grout plug and into a lower aquifer. After the lower aquifer is instrumented, the borehole is grouted back into the lower portion of the casing. Then the upper section of the casing is unscrewed via the coupling collar and removed from the borehole. Finally, instrumentation is added to the upper aquifer and the borehole is appropriately grouted. The coupling collar is designed to have upper right-hand screw threads and lower left-hand screw thread, whereby the sections of the casing can be readily separated.

• DOE Contract Number: W-7405-ENG-48
• Assignee: Dept. of Energy
• Patent Number(s): None
• Application Number: ON: TI85006368
• OSTI ID: 6381101
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
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520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AQUIFERS
BOREHOLES
BUILDING MATERIALS
CAVITIES
CEMENTS
DRILLING
GROUND WATER
HYDROGEN COMPOUNDS
MATERIALS
OXYGEN COMPOUNDS
WATER
WELL CASINGS
WELL DRILLING
WELLS