SYSTEM FOR DETERMINING AND IMAGING WAX DEPOSITION AND CORROSION IN PIPELINES

摘要

The system for determining and imaging wax deposition and corrosion in pipelines relate to systems for determining wax deposition and corrosion by one or both of two techniques. In both techniques, a source of neutron radiation is directed at the pipeline. In one technique, a neutron detector surrounded by an absorption shield defining a collimation window counts neutrons reflected back to the detector by back diffusion or backscatter radiation. In the other technique, a gamma ray detector measures gamma rays emitted when the emitted neutrons are absorbed in the pipeline. A neutron moderator-reflector is placed around three sides of the pipeline to increase the likelihood of neutron capture. A gamma detector surrounded by a gamma absorption shield defining a collimation window counts neutron capture gamma rays. An energy window can be taken for selection of Fe and H gamma rays for high precision imaging.

主权项

1. A system for determination of wax deposition and corrosion in a pipeline, comprising:
a neutron radiation source for emitting neutrons towards a pipeline; a slow neutron detector; an absorption shield having a high slow neutron absorption cross section surrounding the slow neutron detector, the absorption shield defining a collimation window for collimating neutrons diffusing back to the detector from the pipeline; and means for counting neutrons diffusing back to the slow neutron detector, the amount of wax deposition and corrosion in the pipeline being positively correlated with the count of neutrons as provided by the counting means.