Inhibitor dispensing pipeline pig
AssigneeTDW Delaware, Inc.
InventorRick D. Pruett
Life of this patent
Estimating the term…
Abstract
A method of distributing liquid present in the lower portion of a gas pipeline to the interior upper surface of the pipeline including the steps of passing a pig having a venturi therein, the venturi being actuated by gas pressure taken from within the pig, siphoning liquid from the lower interior portion of the pipeline through the venture and distributing siphoned liquid onto the pipeline upper interior surface.
Claims19
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A pipeline pig that is moved through the interior of a pipeline by the flow of pressurized gas and that provides for improved distribution of treating liquid subsisting in the lower portion of the pipeline, comprising;
- a longitudinal pig body having forward and rearward ends;
- centralizers affixed to said pig body by which it is supported in the pipeline and moved by gas flow through the pipeline;
- a bypass passageway within said pig body communicating with the pipeline interior;
- a siphon passageway having an inlet end communicating substantially exclusively with a lower portion of the pipeline interior and thereby with any liquid subsisting therein and having an outlet end;
- and
- a venturi supported by said pig body in communication with said siphon passageway and said bypass passageway, gas flowing through said bypass passageway serving to draw liquid subsisting in said lower portion of the pipeline through said siphon passageway whereby the liquid is discharged from said siphon passageway outlet end onto interior surfaces of the pipeline.
A pipeline pig that is moved through the interior of a pipeline by the flow of pressurized gas and that provides for improved distribution of treating liquid subsisting in the lower portion of the pipeline, comprising:
- a longitudinal pig body having forward and rearward ends;
- centralizers affixed to said pig body by which it is supported in the pipeline and moved by gas flow through the pipeline;
- a bypass passageway within said pig body communicating with the pipeline interior;
- a siphon passageway communicating substantially exclusively with a lower portion of the pipeline interior and thereby with any liquid subsisting therein;
- a venturi supported by said pig body in communication with said siphon passageway and said bypass passageway, gas flowing through said bypass passageway serving to draw liquid subsisting in said lower portion of the pipeline through said siphon passageway whereby the liquid is moved for distribution onto interior surfaces of the pipeline;
- and
- a reservoir carried by said pig body and in communication with said siphon passageway, liquid stored therein being distributed onto interior surfaces of the pipeline.
Dependencies are inferred from the claim text.