Circumferential magnetizer for a pipeline inspection gauge
AssigneeEntegra LLP
InventorPaul Pirner
Life of this patent
Estimating the term…
Abstract
A circumferential magnetic flux leakage module for a pipeline inspection gauge includes a body defining a central axis and a plurality of magnetic bar assemblies arranged circumferentially on the body with respect to the central axis. Each of the plurality of magnetic bar assemblies includes a front bar structure and a rear bar structure with an elbow positioned between the front bar structure and the rear bar structure. The elbow separates the front bar structure from the rear bar structure and provides a circumferential offset between the front bar structure and the rear bar structure. Each of the front bar structure and the rear bar structure includes a central magnet, a north pole structure, a south pole structure, and a plurality of magnetic flux sensors.
Claims20
A circumferential magnetic flux leakage (CMFL) module for a pipeline inspection gauge, the CMFL module comprising:
- a body defining a central axis;
- and
- a plurality of magnetic bar assemblies arranged circumferentially on the body with respect to the central axis, each of the plurality of magnetic bar assemblies including a front bar structure and a rear bar structure with an elbow positioned between the front bar structure and the rear bar structure, wherein the elbow provides a circumferential offset between the front bar structure and the rear bar structure, and wherein each of the front bar structure and the rear bar structure includes a central magnet, a north pole structure, a south pole structure, and a plurality of magnetic flux sensors.
A pipeline inspection gauge comprising:
- a towing section;
- and
- at least one circumferential magnetic flux leakage (CMFL) module coupled to the towing section, the at least one CMFL module comprising:
- a body defining a central axis;
- and
- a plurality of magnetic bar assemblies arranged circumferentially on the body with respect to the central axis, each of the plurality of magnetic bar assemblies including a front bar structure and a rear bar structure with an elbow positioned between the front bar structure and the rear bar structure, wherein the elbow provides a circumferential offset between the front bar structure and the rear bar structure, and wherein each of the front bar structure and the rear bar structure includes a central magnet, a north pole structure, a south pole structure, and a plurality of magnetic flux sensors.
A circumferential magnetizer configured for insertion in a fluid pipeline, the circumferential magnetizer comprising:
- a body defining a central axis;
- and
- a plurality of magnetic bar assemblies arranged circumferentially on the body with respect to the central axis, each of the plurality of magnetic bar assemblies including a linear front bar structure and a linear rear bar structure with an offset positioned between the front bar structure and the rear bar structure such that the front bar structure and the rear bar structure are non-linear.
Dependencies are inferred from the claim text.