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METHOD AND DEVICE FOR DETECTING DAMAGE RATE OF AN INNER COATING OF A DOWNHOLE OIL CASING

  • US 20180209928A1
  • Filed: 03/21/2018
  • Published: 07/26/2018
  • Est. Priority Date: 09/25/2015
  • Status: Active Grant
First Claim
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1. A method for detecting the damage rate of an inner coating of a downhole oil casing, the method comprising:

  • filling an oil casing with electrolyte;

    obtaining a well depth-detection current on a discharge electrode in a process of moving the discharge electrode from one end of the oil casing to the other end of the oil casing; and

    determining a well depth-damage rate state of the inner coating of the oil casing according to the well depth-detection current.

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