Inside BOP Valve (IBOP)

Wells can experience unexpected pressure differences that cause flow into the wellbore; uncontrolled, this can be catastrophic for the rig and crew. Safety valves placed in the drill string, on the rig floor and downhole control kicks and prevent back flow of drilling mud.

The Inside Blowout Preventer (IBOP) is a heavy-duty check valve connected to the drill string at rig floor level to protect against kicks at surface. It can stay in the string as long as needed to restore well control with overbalanced pressure. IBOP valves are made to the latest API 7-1 or NS-1, with API or proprietary connections, in standard or H2S-resistant versions, Class 1.

Main features

• OD sizes from 3-3/8" to 9-1/2"; ID sizes from 1-1/2" to 2-13/16"
• 10,000 or 15,000 psi working pressure (test pressure 15,000 / 22,500 psi)
• Body and internals of high-grade heat-treated steel; PTFE ring seal
• Standard version with surface-treated bore for mud corrosion resistance
• H2S trim version with internals to NACE MR0175

Internal trim series

Hydraulic testing

Each valve is hydraulically bench tested to API Spec 7-1 (latest edition) and delivered with its individual pressure test record, in two steps:

• Shell test: pressurized to test pressure for 3 minutes, depressurized, then pressurized again for at least 10 minutes
• Seat test: pressurized from the pin end to working pressure for at least 5 minutes

No visible leakage is permitted and the pressure drop must not exceed 1% of the test pressure.