API 16A Monogrammed Shaffer Annular Bop 7 1/16" 5000psi
Shaffer Annular Bop blowout preventers are annular type BOPs that can seal reliably on almost any shape or size of kelly, drill pipe, tool joint, drill collar, casing, or wireline. They also provide positive pressure control for stripping drill pipe into and out of the hole. Shaffer Annular Bop are available in bolted cover, wedge cover, and dual wedge cover.
