Method for isolating two aquifers in a single borehole

Patent · Tue Oct 22 04:00:00 EDT 1985

OSTI ID:865642

Burklund, Patrick W ^[1]

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1. Livermore, CA

A method for isolating and individually instrumenting separate aquifers within a single borehole. 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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4548266
• Application Number: 06/572,346
• OSTI ID: 865642
• Country of Publication: United States
• Language: English

Related Subjects

/166/
added
appropriately
aquifer
aquifers
bed
borehole
casing
collar
confining
coupling
designed
drilled
finally
ground
ground surface
grout
grouted
individually
instrumentation
instrumented
instrumenting
isolating
left-hand
lowered
method
plug
portion
readily
readily separated
removed
right-hand
screw
screw thread
section
sections
sections separated
separate
separated
separating
single
single borehole
surface
thread
threads
unscrewed
upper
upper section
via
vicinity
whereby