| 摘要 |
A slug assembly for passage through a pipeline and to be controllably propelled through the pipeline as a sliding restrictive fluid by-pass piston therein in response to fluid being pumped through the pipeline. The slug assembly includes (1) pipeline interior surface engaging wheeled brake structure for controllably braking the speed of travel of the slug assembly through the pipeline, (2) storage tanks for treating liquids to be applied to the interior walls of the pipeline, (3) a wall friction driven pump assembly for pumping liquids from the tanks through a discharge line, (4) a wall friction driven liquid metering assembly for controllably metering the flow of liquid through the discharge line, and (5) a controlled fluid by-pass sliding piston assembly for developing a travel thrust on the slug assembly for movement of the latter through the pipeline in response to a differential between fluid pressures within the pipeline on opposite sides of the piston assembly, the fluid by-pass portion of the piston assembly incorporating a fluid turbine structure driving a trailing rotary spray head to which the liquid discharge from the liquid metering assembly is supplied.
|
