New custom elastomer-to-metal wellhead sealing solution

Jon Lawson

Trelleborg Sealing Solutions has announced the launch of a new metal end cap seal specifically engineered for high temperature/high pressure (HTHP) wellhead tubing and casing hanger sealing environments. It combines the pressure and extrusion resistance of a metal-to-metal bonded component with the flexibility of an elastomer.

The high performance elastomer-to-metal bonded sealing elements provide the high level of extrusion resistance necessary for high pressure and temperature casing and tubing hanger applications. Combining the range of Trelleborg’s proprietary XploR Rapid Gas Decompression (RGD) and sour gas resistant elastomers with corrosion resistant metal end caps, Trelleborg’s engineers can design a customised sealing solution to meet specific oil field requirements.

Sealing in the elastomer-to-metal design solution is achieved by controlled deformation of the end cap elements during installation and operation. Optimal stress distribution throughout the elastomer body is modelled through Finite Element Analysis (FEA) to ensure appropriate design standards are applied to each customer’s unique application. Extrusion resistance is provided by the specially designed metal end caps that provide positive metal-to-metal sealing interference with the hardware upon assembly.

The metal end cap seal can withstand pressures up to 103.4 MPa/15,000 psi and temperatures up to +177°C/+350°F in static applications. The materials comply with NORSOK, NACE, API and Total standards.

Recent Issues