Method and apparatus for measuring axially extending defects in

Details Method and apparatus for measuring axially extending defects in Method and apparatus for measuring axially extending defects in

1987-05-04

1988-12-20

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324233, 324242, 324227, 324226, G01N 2772, G01N 2782, G01R 3312

Patent

active

047927569

ABSTRACT:
A method and apparatus for determining the extent of axially extending defects in ferromagnetic elements, such as tubing comprising a continuous string for use in an oil or gas well is disclosed. The tubing trip tool detects axial defects, such as sucker rod wear during removal of the tubing from the well. A saturating magnetic field and a fluctuating magnetic field are applied to the tubing and the magnitude of the induced fields and the changes are measured to quantify defects in the tubing.

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