The study said blowout preventers ought to be upgraded, especially the blind shear. “All subsea B.O.P. stacks used for deepwater drilling should be equipped with two blind shear rams,” said ...

Petroleum Oil Tools remanufactures and rebuilds blowout preventer stacks for oil and gas drilling rigs. Each oil well BOP stack is remanufactured to the variety of style, size, and pressure ...