Dynamometer 5 : As applied to sucker-rod pumping, the dynamometer records the variation in load on the polished rod as the rod string reciprocates. (ITOGP)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}