US 12,188,995 B2 · Apparatus and method for measuring thickness of tubings in downhole applications

Abstract

A magnetic flux measurement apparatus and method for nondestructive thickness imaging of metallic objects. The apparatus can primarily be used for thickness imaging of concentric metallic pipes, such as inner tubing and outer casing pipes in downhole applications. The magnetic flux measurement apparatus includes a transducer that includes a magnetic field source, magnetic flux sensor rings and a magnetic flux guide lens both positioned in alignment with a lateral axis of the magnetic field source. The magnetic flux guide lens is made of ferromagnetic material with high magnetic permeability that can direct flux lines into a predetermined sensor area for higher sensitivity and signal to noise ratio.

Claims18

Dependent claims

A magnetic flux measurement apparatus for nondestructive thickness imaging testing of metallic objects, the magnetic flux measurement apparatus comprises:

a transducer comprising:
at least one magnetic field source;
one or more magnetic flux sensor rings spatially positioned in alignment with a lateral axis of the at least one magnetic field source;
and
a magnetic flux guide lens operably coupled to the at least one magnetic field source and passes through the one or more magnetic flux sensor rings in alignment with the lateral axis of the at least one magnetic field source, wherein the magnetic flux guide lens is of a tapered profile, wherein the magnetic flux guide lens has a proximal end and a distal end, the proximal end is coupled to the at least one magnetic field source, the magnetic flux guide lens tapers from the proximal end towards the distal end.

2 more elements

Dependencies are inferred from the claim text.

Apparatus and method for measuring thickness of tubings in downhole applications

Life of this patent

Apparatus and method for measuring thickness of tubings in downhole applications

Life of this patent

Abstract

Claims18