Downhole cathodic protection cable system
AssigneeSaudi Arabian Oil Company
InventorAbdul-Raouf M. Al-Ramadhan
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Abstract
A downhole cathodic protection cable system includes an attachment shoe electrically connected to a metallic structure at a distance substantially below the earth's surface, and an electrical cable having a first end connected to a connection structure substantially at the earth's surface and a second end electrically connected to the attachment shoe. The first end is connected through the connection structure to provide current to the cable sufficient to prevent substantial corrosion surrounding the attachment shoe.
Claims20
A downhole cathodic protection cable system for providing cathodic protection to a metallic structure below the earth's surface, said system comprising:
- an electrical connection structure approximately at the earth's surface;
- an attachment shoe electrically connected to the metallic structure at a distance substantially below the earth's surface;
- and
- an electrical cable having first and second ends, said first end being connected to said connection structure and said second end being electrically connected to said attachment shoe,
- wherein said first end is electrically connectable through said connection structure to a current source for providing a current to said cable sufficient to prevent substantial corrosion of a portion of the metallic structure surrounding said attachment shoe.
A method of providing cathodic protection to a metallic structure below the earth's surface, said method comprising the steps of:
- electrically connecting an attachment shoe to the metallic structure at a distance substantially below the earth's surface;
- electrically connecting a first end of an electrical cable to the attachment shoe;
- connecting a second end of the cable to a connection structure approximately at the earth's surface;
- and
- electrically connecting the second end of the cable through the connection structure to a current source for providing a current to the cable sufficient to prevent substantial corrosion of a portion of the metallic structure surrounding the attachment shoe.
Dependencies are inferred from the claim text.