Bottom Hole Choke 1 : A device with a restricted opening placed in the lower end of the tubing to control the rate of liquid or gas flow to the surface. (See: Choke.) (WLOP)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}