Annular blowout preventers are compact, annular type BOPS which seal reliably on almost any shapeor size -kellys, drill pipe, tool joints, drill collars, casing or wireline. Sphericals also provide positive pressure control for stripping drill pipe into and out of the hole, They are available in bolted cover, wedge cover models.
There are also special lightweight models for airlifting and Arctic models for low temperature service.
Our blowout preventers are manufactured in accordance with API Specification 16A, Third Edition and NACE MR0175 per API Specification 16A, Temperature T20. They meet the applicable API and NACE requirements for H2S service.