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Title: Method for isolating two aquifers in a single borehole

Abstract

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.

Inventors:
 [1]
  1. Livermore, CA
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
865642
Patent Number(s):
US 4548266
Application Number:
06/572,346
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; isolating; aquifers; single; borehole; individually; instrumenting; separate; drilled; ground; surface; upper; aquifer; separating; confining; bed; casing; sections; separated; coupling; collar; lowered; grouted; vicinity; section; grout; plug; instrumented; portion; unscrewed; via; removed; finally; instrumentation; added; appropriately; designed; right-hand; screw; threads; left-hand; thread; whereby; readily; readily separated; ground surface; upper section; sections separated; single borehole; screw thread; /166/

Citation Formats

Burklund, Patrick W. Method for isolating two aquifers in a single borehole. United States: N. p., 1985. Web.
Burklund, Patrick W. Method for isolating two aquifers in a single borehole. United States.
Burklund, Patrick W. Tue . "Method for isolating two aquifers in a single borehole". United States. https://www.osti.gov/servlets/purl/865642.
@article{osti_865642,
title = {Method for isolating two aquifers in a single borehole},
author = {Burklund, Patrick W},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {10}
}

Patent:

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