UH-3 Unihead® Wellhead System

The UH-3 Unihead® technology from TechnipFMC is a standardized wellhead system for onshore and offshore oil and gas drilling. The system features a patented PI‑MEC (Pressure Intensified Metal End Cap Seal) that combines elastomer technology with metal‑like sealing performance, preventing gas ingress and eliminating the risk of rapid gas decompression. Unlike conventional systems, the UH‑3 uses an internal latch instead of lockdown screws, reducing potential leak paths and improving safety.

The system is available in 5,000 psi and 10,000 psi pressure ratings for onshore applications, and only 10,000 psi for offshore. The UH‑3 saves up to 40 hours of rig time per well by eliminating wait‑on‑cement, avoiding casing cutting, and reducing BOP manipulations. The product is fully qualified according to API 6A PR2F and comes with 24/7 global service support.

Overview (2 paragraphs)

The UH‑3 system accommodates a wide range of casing programs – from slimhole to full‑hole – with a typical 30″×20″×13⅜″×9⅝″ scheme down to tubing. The PI‑MEC seal operates on Pascal’s principle, intensifying its sealing force under higher pressure and temperature, making it ideal for gas wells and harsh environments. Qualification testing was performed from −75°F to +350°F, including extended hot and cold cycles.

Key advantages include fast make‑up with Speedloc® connections, independent load shoulders for each hanger, elimination of J‑slots on bowl protectors, and the ability to test the BOP without removing the bowl protector. The company offers life‑of‑field services including installation, repair, maintenance, and decommissioning, with local inventories and rental options.

Technical Specifications – UH‑3 Unihead®