Well fluid isolation and sample apparatus and method

Patent · Sun Jan 01 00:00:00 EST 1995

OSTI ID:870068

Schalla, Ronald ^[1]; Smith, Ronald M ^[2]; Hall, Stephen H ^[1]; Smart, John E ^[2]

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1. Kennewick, WA
2. Richland, WA

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.

• Research Organization: Battelle Memorial Institute, Columbus, OH (United States)
• DOE Contract Number: AC06-76RL01830
• Assignee: Battelle Memorial Institute (Richland, WA)
• Patent Number(s): US 5450900
• OSTI ID: 870068
• Country of Publication: United States
• Language: English

Related Subjects

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
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