Cathodic Protection for Well Casings

well casing

Corrosion on well casings can come in the form of general corrosion or as more localized corrosion in areas where elements such as aquifers, soil conditions or salt caps can accelerate the corrosion rate. Cathodic protection has been used successfully for decades as a means to protect casing strings in production and disposal wells.

Factors such as well depth, casing size, soil corrosivity and electrical continuity must be considered during the design process. Anode systems that are sized or installed incorrectly can degrade rapidly, leading to premature depletion, requiring replacement in order to adequately manage active corrosion.

Proper protection of well casings can provide years of trouble-free operations and minimize required maintenance. Inspection of the casings is generally expensive, with access for inspection tools often limited by surface equipment and the casing hanger. A purpose-built cathodic protection system prevents corrosion and typically represents 1 to 3 percent of the cost of a well. Once installed, ongoing monitoring of the cathodic protection system can be performed without production interruption.

With over 40 years of experience in designing and installing systems that provide long-term protection, Corrpro’s well casing solutions meet both NACE and API guidelines and are very similar to conventional deep anode groundbed (DAGB) systems.

Wells with adequate cathodic protection have far fewer leaks and failures than unprotected wells.


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Houston, TX 77040

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Well Casings Brochure

Learn more about cathodic protection for well casings.

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