Pipeline scale removal

A pipeline system comprising:

• a tubular pipe;
• a fluid flowing through the pipe;
• and
• a scraper pig for cleaning an interior wall of the tubular pipe, the scraper pig comprising:
• a main body with a conduit extending therethrough, an interior surface of the conduit defining a conical inlet converging to a throat and a conical outlet diverging from the throat such that the conduit is venturi-shaped;
• one or more scraper heads;
• and
• a plurality of turbine blades disposed in the conical outlet about a longitudinal axis of the conduit, wherein the scraper pig configured such that:
• when the pig is disposed within the pipe, the longitudinal axis of the conduit is parallel to and coincident with a longitudinal axis of the pipe;
• and
• as a fluid flowing in the pipe pushes the pig through the pipe, at least a portion of the fluid flows into the conduit and through the throat and thence across the plurality of turbine blades, thereby imparting rotation on the one or more scraper heads as the scraper heads scrape at least a portion of the interior wall of the pipe.

A method comprising:

• disposing, into a tubular pipe of a pipeline system, a scraper pig, the scraper pig comprising:
• a main body with a conduit extending therethrough, an interior surface of the conduit defining a conical inlet converging to a throat and a conical outlet diverging from the throat such that the conduit is venturi-shaped;
• one or more scraper heads;
• and
• a plurality of turbine blades disposed in the conical outlet about a longitudinal axis of the conduit;
• and
• flowing a fluid through the pipe, thereby pushing the pig through the pipe and dislodging,
• by the one or more scraper heads, material from the interior surface of the pipe, at least a portion of the fluid flowing into the conduit and through the throat and thence across the plurality of turbine blades, thereby imparting rotation on the one or more scraper heads as the scraper heads scrape at least a portion of an interior wall of the pipe.