Method and apparatus for electrical surveys of offshore metal st

Details Method and apparatus for electrical surveys of offshore metal st Method and apparatus for electrical surveys of offshore metal st

1980-02-29

1982-12-21

Strecker, Gerard R.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

Erosion

324 52, 324 54, 324348, 324365, 364571, G01R 3102, G01V 315

Patent

active

043651917

ABSTRACT:
In the present invention a method and apparatus for electrical surveys of offshore metal structures includes measuring the electrical potential difference between the structure and an electrolyte, such as sea water and/or the sea bottom, in which the structure is contained. Such measurements are made at roughly approximated recorded distance locations along the structure and the approximate distance information is corrected based on periodically taken accurate distance measurements. Provision is also made to correct data for line currents in the structure, and a method is disclosed for examining the effectiveness of an electrically insulating member connected in the structure. Moreover, an improved insulated wire having minimum insulation holidays and a method for making the same are disclosed.

REFERENCES:
patent: 2378440 (1945-06-01), Scott
patent: 2610226 (1952-09-01), Klaasse et al.
patent: 3490032 (1970-01-01), Zurflueh
patent: 3526831 (1970-09-01), Smith
patent: 4010413 (1977-03-01), Daniel
patent: 4228399 (1980-10-01), Rizzo et al.
patent: 4231111 (1980-10-01), Neeley
patent: 4258323 (1981-03-01), Andrews et al.

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