• May 23. 2024

JST’s FS Casing and Tubing Hanger Seal use high performance elastomer seal technology for arduous duties where there are large clearances between mating parts of wellhead and associated assemblies. The FS Seal design supports reduction in installation time, correct placement in the housing and simple installation.   FS seals have been validated in accordance with API requirements for us...

• September 10. 2024

In the oil and gas industry, the risk and consequences of unplanned downtime are greatest in extreme environments. JST understands the demands you face every day and offers a range of fully tested and certified wellhead sealing products to reliably meet your business and technical challenges.   You can trust our FS seals and S seals as well as our T seals and locked T seals to perform in the ...

• July 09. 2026

In oil and gas wellhead systems, sealing reliability is essential for maintaining well integrity and preventing pressure loss. Among the various sealing solutions used in API 6A wellhead equipment, the FS Seal is specifically designed to compensate for rough sealing surfaces and larger dimensional tolerances commonly found in casing and tubing connections.   If you're selecting seals for a ca...

• July 15. 2026

In oil and gas wellhead systems, selecting the correct sealing solution is essential for maintaining pressure integrity and long-term operational safety. Two sealing products commonly used in casing heads and tubing heads are the FS Seal and the P Seal. Although both are designed for static sealing in wellhead equipment, they are engineered for different sealing conditions and installation require...

• July 29. 2026

Selecting the right casing hanger seal is an important part of designing or maintaining an oil and gas wellhead. The seal must maintain pressure integrity between the casing and wellhead components while accommodating the actual dimensions, surface condition, pressure, temperature, and well fluids involved.   A seal that matches the nominal casing size may not necessarily be the right choice....