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US 6,438,782 B1Granted
Apparatus for removing material from pipelines and method of making
AssigneeHygienic Pigging Systems Limited
InventorThomas Palmer
Life of this patent
Estimating the term…
Abstract
A pig for evacuating pipelines is disclosed. The pig includes a body of a deformable material having an outer surface configured to contour to a pipeline to be evacuated. At least a portion of the deformable material is impregnated with a quantity of magnetic or magnetizable metallic particals.
Claims7
A pig for evacuating pipe lines comprising:
- a) a body of deformable material having an outer surface configured to a contour corresponding to the contour of inner surfaces of a pipeline to be evacuated;
- b) the deformable body being adapted to deform to slidingly seal against such inner surfaces as force is applied to the body to force it along such pipeline;
- and
- c) at least a portion of the deformable material being impregnated with a quantity of a material of a selected one of magnetic and magnetizable metallic particles whereby to enable location of the pig when within a pipeline.
1 more element
A pig for being forced through a pipeline in a pipeline evacuating procedure, the pig comprising:
- a) a body of plastic material having a cross sectional configuration complemental to the contour of a pipeline to be evacuated;
- b) at least a perimetral portion of the body being deformable under fluid pressure applied to propel the body through such pipeline, the body deformation being effective to cause external surfaces of the body to engage inner surfaces of such pipeline in a wiping action as the body is moved along such pipe under such fluid pressure, and,
- c) the plastic material of the body being impregnated with a material of a selected one of magnetic and magnetizable metallic particles whereby to enable location of the pig when within a pipeline.
Dependencies are inferred from the claim text.