Tubing Anchor 1 : A downhole, packer-like device run in a string of tubing that grips the wall of the casing to prevent up and own movement of the lower section of tubing as the well is pumped by a rod pump. (ITOGP)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}