AWWA ACE61607

Historically, large diameter aquifer storage and recovery (ASR) wells have beenconstructed utilizing heavy walled steel pipe as the final casing. Because of thebrackish nature of an ASR storage zone the life of the well is reduced and thewater quality near the well can be altered.Large diameter polyvinyl chloride (PVC) well casings, such as Certa-Lok, havebeen used in ASR and Reverse Osmosis well construction because they are nonferrous.Certa-Lok well casing also provides good sealing characteristics and alocking system that can handle the vertical weight. However, all PVC productsare effected by the heat of hydration during cementing operations and Certa-Lokis currently limited to a maximum outside diameter of 17.4 inches.With these limitations, any alternative well casing materials and designs wereinvestigated. A large diameter fiberglass pipe (FRP) with double O-ring seals anda positive locking system was determined to be a good solution to this problem.The FRP was successfully installed in two wells in Florida and based on thelessons learned and experience gained; it is an optimal choice in brackish orcorrosive environments. Includes abstract only.

Product Details

Edition:

Vol. - No.

Published:

06/17/2005

Number of Pages:

1

File Size:

1 file , 290 KB