Method and apparatus for gathering liquid sample using a submers

Details Method and apparatus for gathering liquid sample using a submers Method and apparatus for gathering liquid sample using a submers

1997-02-07

1998-11-24

Tsay, Frank

Wells

Processes

Sampling well fluid

166 68, 166 72, E21B 4312

Patent

active

058395091

ABSTRACT:
This invention is directed toward apparatus and methods for gathering liquid samples from a reservoir of liquid using a submersible pump and subsequently retrieving the samples for analysis. The invention is more specifically directed toward the gathering and preparing of water samples for analysis for tritium content, where the samples are collected from underground formations penetrated by a borehole or collected at varying depths in surface canals and the like. The samples are subsequently transferred to the surface of the earth for analysis. The submersible pump is operated by means of a surface valving system and a valving system mounted on the submersible pump. The pump inlet valve is set to open or "crack" at a predetermine pressure, however the pump is not filled until a vacuum is applied to the pump. After filling, the pump is purged thereby transporting the sampled liquid to the surface by applying pressure. Vacuum and pressure are supplied to the submerged pump by means of a surface vacuum/compressor system. No electrical valves or electrical power sources are required in the submersible pump.

REFERENCES:
patent: 4546830 (1985-10-01), McLaughlin et al.
patent: 4585060 (1986-04-01), Bernardin et al.
patent: 4625801 (1986-12-01), McLaughlin et al.
patent: 5261348 (1993-11-01), Niehaus et al.
patent: 5373897 (1994-12-01), Skarvan

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