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Title: Well purge and sample apparatus and method

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. 8 figs.
Inventors:
; ; ; ;
Issue Date:
OSTI Identifier:
119039
Assignee:
Battelle Memorial Inst., Richland, WA (United States) PTO; SCA: 580000; 540220; PA: EDB-95:151547; SN: 95001477070
Patent Number(s):
US 5,460,224/A/
Application Number:
PAN: 8-112,829
Contract Number:
AC06-76RL01830
Resource Relation:
Other Information: PBD: 24 Oct 1995
Research Org:
Battelle Memorial Institute
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 54 ENVIRONMENTAL SCIENCES; WELLS; SAMPLING; SAMPLERS; DESIGN; RESERVOIR FLUIDS; MONITORING; PACKINGS; ANNULAR SPACE

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