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Title: Well fluid isolation 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 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. A seal may be positioned above the active portion thereby sealing the well and preventing any mixing or contamination of inlet fluid with fluid above the packer. Purged well fluid is stored in a riser 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]
  1. Kennewick, WA
  2. Richland, WA
Publication Date:
Research Org.:
Battelle Memorial Institute, Columbus, OH (United States)
OSTI Identifier:
870068
Patent Number(s):
US 5450900
Assignee:
Battelle Memorial Institute (Richland, WA)
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
fluid; isolation; sample; apparatus; method; specifically; permits; purging; sampling; removing; 25; volume; compared; conventional; methods; minimum; assembly; inserted; designed; outside; diameter; inside; column; height; bottom; top; active; portion; annulus; removed; seal; positioned; sealing; preventing; mixing; contamination; inlet; packer; purged; stored; riser; ports; wall; permit; fluid volume; outside diameter; conventional methods; inside diameter; active portion; sample apparatus; specifically permits; permits purging; volume compared; fluid isolation; inlet fluid; /166/

Citation Formats

Schalla, Ronald, Smith, Ronald M, Hall, Stephen H, and Smart, John E. Well fluid isolation and sample apparatus and method. United States: N. p., 1995. Web.
Schalla, Ronald, Smith, Ronald M, Hall, Stephen H, & Smart, John E. Well fluid isolation and sample apparatus and method. United States.
Schalla, Ronald, Smith, Ronald M, Hall, Stephen H, and Smart, John E. Sun . "Well fluid isolation and sample apparatus and method". United States. https://www.osti.gov/servlets/purl/870068.
@article{osti_870068,
title = {Well fluid isolation and sample apparatus and method},
author = {Schalla, Ronald and Smith, Ronald M and Hall, Stephen H and Smart, John E},
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 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. A seal may be positioned above the active portion thereby sealing the well and preventing any mixing or contamination of inlet fluid with fluid above the packer. Purged well fluid is stored in a riser 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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