noun
- a pumping unit powered by an engine that extracts crude oil from a well by means of a reciprocating motion
Usage: technical; oil industry
Examples
- The pumpjack rhythmically bobbed up and down in the oil field.
- Modern pumpjacks are designed to operate efficiently in harsh desert conditions.
- The old pumpjack had been extracting oil from that well for over thirty years.
- Engineers inspected the pumpjack to ensure it was functioning properly.
- The distinctive silhouette of a pumpjack is a common sight in oil-producing regions.