• August 27. 2021

Wellhead is a critical part of the oil and gas infrastructure. Seals material and design must withstand pressures as high as 15K psi and temperatures LU (-46℃~121℃), PU (-21℃~121℃), or SX (-18℃~178℃). From material development, seals design, testing, through to production, JST make FS seal and S seal to perform in the toughest situations, delivering reliable high pressure sealing. They combine the...

• September 24. 2021

S seal and O ring both can be used for wellhead casing but they have different functions and suitable for different working conditions. O ring is a static seal. It is suitable for lower pressure, small groove gap and smooth groove surface. O ring is usually combined with back up ring. But in hostile environment, such as H2S, high pressure, high and lower temperature, rough groove surface, o ring w...

• October 14. 2021

In the oil and gas industry, the risk and consequence of unplanned downtime is greatest in extreme environments. JST has long been committed to the provision of sealing solutions for the exploration and production of oil and gas. Wellhead is a critical part of oil and gas infrastructure. Its sealing materials need to withstand pressures as high as 15 000 psi and temperatures of 149º C. From d...

• December 09. 2021

Recently, JST 13 inch External S seal has successfully passed the PR2 test at P-U (-20 deg F - 250 degrees F), 10000PSI nitrogen high pressure as per API 6A 21st Edition Annex F Section F.2.14: Design Verification for PR2F Group 5 Mandrel-type hangers, Table F.17 Sections: Pressure from below seals and pressure from above annulus seals. Test as specified in F.1.11 Test Procedure we follow as below...

• December 14. 2021

For wellhead casing head, tubing hanger, JST provides elastomer seals including FS seal, S seal, P seal, O ring, MEC metal end-cap seal and lock screw packing. These seals are essential elements in the integrity and functionality of wellhead equipment. We developed HNBR, FKM, AFLAS and other material accordingly which have high pressure resistance, good sealing characteristics. 1. Materials tested...

• February 10. 2022

There are two sets of sealing rings (secondary sealing of oil casting head) at the bottom of conventional oil pipe head and casting head, which are used to seal the castings suspended at the top. At present, the commonly used seals are FS seal, S seal and P seal. The design of S and FS wellhead seals requires that they can withstand higher and higher pressure and temperature, and meet more stringe...

• March 03. 2022

JST Seals produces various sizes of FS seal and P seal, from 4.5" to 36". FS seal: FS seal is suitable for 15000Psi, LU temperature rating, chemicals with H2S/CO2. Below drawings show our standard FS seal groove dimension and product drawing. 26” FS seal 30” FS seal P seal: Regarding P seal, JST has two different designs. One design is rubber reinforced with two 316ss wire mesh back up rings, anot...

• April 06. 2022

S Seals are well suited for sealing wellheads, connectors,  downhole tools, high pressure valves and other demanding oil and gas applications. The non-extrusion springs can be fabricated from different metals. Product Highlights Alternative engineered seal design to using T Seals or O-Rings, traditional S Seals utilize metal spring for supporting sealing of various extrusion gaps. Designed as...