DHSV SCALE REMOVAL METHOD IN THE PRODUCTION STRING
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United States of America Patent
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Issued Date -
Feb 23, 2023
app pub date -
Aug 18, 2022
filing date -
Aug 18, 2022
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Abstract
The present invention addresses to a method of removing scale from the DHSV of the oil production string aiming at maintaining the production of the wells and thus avoiding the loss of production. First, a neutralizing solution is placed in the service line, before pumping the scale removing solution through the string to act on the DHSV. Next, the acid is pumped into the production string to react with the calcium carbonate scale. After the time for the dissolution of the scale inside the DHSV, the well is opened for production by the service line. The spent acid is mixed with the neutralizing solution inside the service line, reducing its corrosiveness in relation to the service line, contributing to its preservation.
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