Inside Blow Out Preventer (IBOP)

At Kriloha Ltd., we supply Inside Blow Out Preventers (IBOPs), also known as Gray Valves, which are critical safety devices for drill string well control. The IBOP functions as a one-way check valve that allows normal circulation downward but prevents backflow of formation fluids into the drill string. This prevents dangerous well control incidents such as kicks and blowouts. Constructed from premium alloy steels, Kriloha IBOPs are API 7-1 certified and rated for pressures up to 15,000 psi, making them suitable for HPHT and deepwater operations. Their compact design enables quick installation inside the drill pipe or BHA during well control emergencies. Applications include kick prevention, blowout protection, and maintaining well control during circulation or tripping operations. IBOPs are indispensable in both onshore and offshore drilling environments. Each unit undergoes hydrostatic testing, pressure cycling, sealing integrity checks, and fatigue testing, ensuring reliability under extreme conditions. As a supplier and facilitator, Kriloha Ltd. provides full sets of inside BOPs, redress kits, and technical training, enabling operators to respond rapidly to well control incidents. Our IBOPs are trusted by drilling contractors and operators globally for safety, reliability, and compliance with international standards.