• January 17. 2022

Metal End Cap Seals are one of the metal bonded elastomeric seals with the high level of extrusion resistance necessary for high pressure casing and tubing applications. JST has designed a PEEK End Cap Seals instead of Metal End Cap Seals to meet with customers special requirement. Why do we choose a non-metallic non-extrusion device as non-extrusion device for this seal? It’s because the lock dow...

• May 13. 2022

P seal is constructed from an elastomer with back up rings for anti-extrusion. Energized by the injection of sealant, it is a static seal that is used to seal rough casing and tubing. Backup rings are available in Mesh Stainless Steel or Solid Carbon Steel. The standard P Seal is a one-piece molded seal utilizing molded-in anti-extrusion device. This design enhances assembly by eliminating the loo...

• May 05. 2023

T-seals are commonly used in various applications to create a reliable seal between two surfaces. In the oil and gas industry, T-seals are particularly useful in wellhead equipment as tubing hanger seals. The tubing hanger is a critical component in oil and gas wells that supports the weight of the tubing and provides a seal between the production tubing and the wellhead. T seals are three-piece s...

• October 25. 2023

Lockdown screw seals have been widely used in geothermal applications as they provide superior performance over traditional metal pressure seals. These seals are designed to handle high pressure and high temperature conditions, making them an ideal choice for geothermal applications. Lockdown screw seals consist of HNBR (Hydrogenated Nitrile Butadiene Rubber) packing with stainless steel caps that...

• 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 22. 2025

In oil wellhead applications, sealing system failures are not an option. Environments characterized by extreme pressures (often exceeding 15,000 psi), aggressive sour gas (H₂S/CO₂), rapid temperature fluctuations, and constant vibration relentlessly test the limits of standard sealing solutions. Elastomeric seals can extrude, degrade, or harden, leading to catastrophic leaks, environmental hazards...