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Title: Well purge and sample apparatus and method

Abstract

The present invention specifically permits purging and/or sampling of a well but only removing, at most, about 25% of the fluid volume compared to conventional methods and, at a minimum, removing none of the fluid volume from the well. The invention is an isolation assembly with a packer, pump and exhaust, that is inserted into the well. The isolation assembly is designed so that only a volume of fluid between the outside diameter of the isolation assembly and the inside diameter of the well over a fluid column height from the bottom of the well to the top of the active portion (lower annulus) is removed. The packer is positioned above the active portion thereby sealing the well and preventing any mixing or contamination of inlet fluid with fluid above the packer. Ports in the wall of the isolation assembly permit purging and sampling of the lower annulus along the height of the active portion.

Inventors:
 [1];  [2];  [1];  [2];  [3]
  1. (Kennewick, WA)
  2. (Richland, WA)
  3. (Redmond, WA)
Issue Date:
Research Org.:
BATTELLE MEMORIAL INSTITUTE
OSTI Identifier:
870126
Patent Number(s):
5460224
Assignee:
Battelle Memorial Institute (Richland, WA) PNNL
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
purge; sample; apparatus; method; specifically; permits; purging; sampling; removing; 25; fluid; volume; compared; conventional; methods; minimum; isolation; assembly; packer; pump; exhaust; inserted; designed; outside; diameter; inside; column; height; bottom; top; active; portion; annulus; removed; positioned; sealing; preventing; mixing; contamination; inlet; ports; wall; permit; fluid volume; outside diameter; conventional methods; inside diameter; active portion; sample apparatus; specifically permits; permits purging; volume compared; inlet fluid; /166/

Citation Formats

Schalla, Ronald, Smith, Ronald M., Hall, Stephen H., Smart, John E., and Gustafson, Gregg S. Well purge and sample apparatus and method. United States: N. p., 1995. Web.
Schalla, Ronald, Smith, Ronald M., Hall, Stephen H., Smart, John E., & Gustafson, Gregg S. Well purge and sample apparatus and method. United States.
Schalla, Ronald, Smith, Ronald M., Hall, Stephen H., Smart, John E., and Gustafson, Gregg S. Sun . "Well purge and sample apparatus and method". United States. https://www.osti.gov/servlets/purl/870126.
@article{osti_870126,
title = {Well purge and sample apparatus and method},
author = {Schalla, Ronald and Smith, Ronald M. and Hall, Stephen H. and Smart, John E. and Gustafson, Gregg S.},
abstractNote = {The present invention specifically permits purging and/or sampling of a well but only removing, at most, about 25% of the fluid volume compared to conventional methods and, at a minimum, removing none of the fluid volume from the well. The invention is an isolation assembly with a packer, pump and exhaust, that is inserted into the well. The isolation assembly is designed so that only a volume of fluid between the outside diameter of the isolation assembly and the inside diameter of the well over a fluid column height from the bottom of the well to the top of the active portion (lower annulus) is removed. The packer is positioned above the active portion thereby sealing the well and preventing any mixing or contamination of inlet fluid with fluid above the packer. Ports in the wall of the isolation assembly permit purging and sampling of the lower annulus along the height of the active portion.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}

Patent:

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