Development and testing of new offshore cathodic protection criteria

Journal Article · Thu May 01 00:00:00 EDT 1986 · SPE (Society of Petroleum Engineers) Product. Eng.; (United States)

DOI:https://doi.org/10.2118/13316-PA· OSTI ID:5400608

Evans, S

New sacrificial anode protection criteria developed and tested by Dubai Petroleum Co. (DPC) resulted in a 40% decrease in anode weight as compared to that required by conventionally accepted design. Derivation of the criteria is based on an analysis of extensive field results of potential surveys of seven DPC platforms that had conventional sacrificial anode protection systems. It was found that an initial platform current density of 29+.2 x 10/sup -3/A/sq ft (310+.20mA/m/sup 2/) of area exposed to seawater resulted in polarization of the platform to -1 V with respect to the silver/silver-chloride reference electrode. As a consequence of this initial polarization, the electric current requirement for protection is reduced significantly. The new criteria were used in the design of Platform JJ, which was installed in September 1982. Field results that include periodic potential surveys of Platform JJ are presented and discussed.

• Research Organization: Conoco Inc.
• OSTI ID: 5400608
• Journal Information: SPE (Society of Petroleum Engineers) Product. Eng.; (United States), Vol. 1:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
42 ENGINEERING
OFFSHORE PLATFORMS
CATHODIC PROTECTION
DESIGN
ANODES
CORROSIVE EFFECTS
CURRENT DENSITY
ELECTRIC CURRENTS
OIL WELLS
PERFORMANCE TESTING
POLARIZATION
SEAWATER
SILVER
SILVER CHLORIDES
CHLORIDES
CHLORINE COMPOUNDS
CORROSION PROTECTION
CURRENTS
ELECTRODES
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
METALS
OXYGEN COMPOUNDS
SILVER COMPOUNDS
TESTING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WATER
WELLS
020300* - Petroleum- Drilling & Production
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)
423000 - Engineering- Marine Engineering- (1980-)