Stuffing Box 2 : A packing gland that may be adjusted to allow a wireline or polished rod to operate through it while containing well pressure and well fluids. (WLOP)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}