INSIDE BOP

When the drill tool is lifted out of the hole, blowout could happen due to  suction. In event of a blowout, the open position of the IBOP valve allows  back flow, easing the installation process. Upon successful installation,  the valve can be promptly closed with a relief rod to prevent further back  flow. Fluid can then be pumped in from the surface to discharge the IBOP  and drill string. The purpose of the blowout prevention can be achieved by  the following generic steps: discharging the relief sub; regulation of fluid;  commence pump circulation. 

When ordering please specify the connection of drill string.