Pulsed rectifier limitations for well casing cathodic protection
Journal Article
·
· Materials Performance
OSTI ID:116520
- Electro Sciences, Inc., Crystal Lake, IL (United States)
Rectifier current pulses applied to deep well casings suffer considerable waveform deterioration as well depth increases. Cathodic protection (CP) attributed to the use of a pulsed rectifier will not be effective below a certain depth, which is a function of pulse characteristics and soil resistivity. A hypothetical 3,000-m length well casing is modeled as a distributed lossy electrical transmission line. Below 300- to 500-m depths, the higher frequency of the pulse is severely attenuated. Therefore, the CP process results at greater depths will not differ significantly from those obtained with a nonpulsed DC rectifier.
- OSTI ID:
- 116520
- Journal Information:
- Materials Performance, Journal Name: Materials Performance Journal Issue: 10 Vol. 34; ISSN MTPFBI; ISSN 0094-1492
- Country of Publication:
- United States
- Language:
- English
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