Features of Shaffer NL Style Annular BOP

● The rubber core has a large amount of glue storage, the frictional resistance is small when switching, and the well pressure assisting sealing ability is strong.

● Adopting a hemispherical top cover, no stress concentration during pressure bearing, the shell is evenly loaded, easy to disassemble

● Short piston stroke, low height, and wear ring

● With lip seals for long service life

● The outer diameter of the low-temperature annular blowout preventer shell is machined with a trough-shaped steam pipe. The pipe is filled with saturated steam and heated around the shell. (Optional)

● High-nickel-base alloy is deposited on all contact wells in the high sulfur-resistant BOP, which can achieve the highest level of anti-H2S and CO2 effects. (optional)