Apparatus and method for the controlled release of chemical additives
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United States of America Patent
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N/A
Issued Date -
Jun 17, 2004
app pub date -
Dec 16, 2002
filing date -
Dec 16, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An apparatus and method for the controlled release of chemical additives within piping and wellbores. The apparatus is a water dispersible container that controls the release of one or more chemical additives such as corrosion inhibitors, oxygen scavengers, or biocides. The dispersible container is comprised of polyvinyl alcohol chains. The selection of the chains is determined by the application of the container and includes short-chained cold water soluble polyvinyl alcohols, long-chained hot water soluble polyvinyl alcohols, or vinyl alcohol co-polymers. In the method for the controlled release of chemical additives, the container is placed in a pipe or tank for circulation throughout a wellbore. Alternatively, the container is placed in a cap for a subsea well bore.
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