Pig Sweep®: Nanoparticles Transform Pipeline Cleaning & Integrity Management

Abstract

This paper details the evolution of a new and innovative cleaning agent for heavy oil and natural gas pipelines. Information is offered regarding the reason for development and the research involved in formulation of a nanotechnology product. Application details, economic and operational benefits from case histories involved with cleaning two different pipelines, and a preview of a recently developed laboratory testing program is presented. Oil, gas, and multi-phase pipelines can be fouled with several types of deposits or internally restrictive debris. Common types of foulants and the detrimental effects on pipeline operation are reviewed. A nanotechnology product has shown to be highly effective at removal of a wide variety of foulants. Pig Sweep® provides a nanotechnology-based mechanical cleaning mechanism as opposed to a chemical reaction. The cleaning mechanism and model that potentially protects the pipe wall surface from future deposition or debris collection is reviewed. The case histories include on-line cleaning of two different pipelines. The first resulted in the removal of more than 41,000 pounds of solids from a 344-mile long, 36″ diameter, dry gas pipeline system. The second case study was performed on a 63-mile, 24″ diameter, dry gas pipeline which resulted in reduced pressure drop, significant operational savings from reduced compression requirements, and significant increased throughput.