Progressive fluid sampling for boreholes

Details Progressive fluid sampling for boreholes Progressive fluid sampling for boreholes

1994-03-02

1995-01-03

Dang, Hoang C.

Wells

Processes

Sampling well fluid

166 50, 166 72, 166191, E21B 4908

Patent

active

053777549

ABSTRACT:
An everting membrane assembly defines a constant volume for traveling along a generally horizontal borehole, pipe, or the like, having two accessible ends, for sampling within the borehole on a continuous basis. A first everting membrane carries an extraction tube through the borehole. A second everting membrane contains a perforated pipe for attachment to the extraction tube. As the first membrane is inverted back through the borehole, the second membrane is everted, forming a sampling volume therebetween with the perforated pipe exposed in the sampling volume for withdrawing fluids through the extraction tube for analysis.

REFERENCES:
patent: 2927775 (1960-03-01), Hildebrandt
patent: 4522125 (1985-06-01), Marz
patent: 5176207 (1993-01-01), Keller
patent: 5287741 (1994-02-01), Schultz et al.
patent: 5293931 (1994-03-01), Nichols et al.

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