Corrosion inhibition method and apparatus for downhole electrica

Details Corrosion inhibition method and apparatus for downhole electrica Corrosion inhibition method and apparatus for downhole electrica

1989-03-14

1991-05-07

Dang, Hoang C.

Wells

Processes

Electric current or electrical wave energy through earth for...

166 60, 166 651, 166902, 204196, E21B 4324, E21B 4102

Patent

active

050128680

ABSTRACT:
Method and apparatus for corrosion inhibition in an electromagnetic heating system for heating a portion of a mineral fluid deposit adjacent an oil well or other mineral fluid well, in situ. The preferred apparatus includes a power source, that develops a high amperage heating current, over 100 amperes, at a heating frequency usually in a range of from 0.01 Hz or lower to 35 Hz, in a heating circuit that includes a main heating electrode downhole of the well and a return electrode. The power source also supplies a very low amplitude, controlled D.C. bias current to those electrodes, maintaining the main electrode at a neutral or negative polarity for corrosion protection. The D.C. bias current is monitored and maintained below a given minimum level, usually about one ampere, to extend the effective life of the return electrode and to minimize corrosion protection costs.

REFERENCES:
patent: 2801697 (1957-08-01), Rohrback
patent: 3220942 (1965-11-01), Crites
patent: 3642066 (1972-12-01), Gill
patent: 3674662 (1972-07-01), Haycock
patent: 3724543 (1973-04-01), Bell et al.
patent: 3734181 (1973-05-01), Shaffer
patent: 4010799 (1977-03-01), Kern et al.
patent: 4211625 (1980-07-01), Vandevier et al.
patent: 4413679 (1983-11-01), Perkins
patent: 4790375 (1988-12-01), Bridges et al.
patent: 4919201 (1990-04-01), Bridges et al.

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