• March 29. 2022

Lockdown Screw Seals, also called lockdown screw packing is made from elastomer and two SS metal end caps. It provides a dependable seal in multiple pressure ranges and service environments. JST has conducted the PR2 test to qualify the existing elastomer/metal lockdown screw packing to 20,000 psi at a temperature range of -50 to 350ºF. This test consisted of a 20,000 psi nitrogen gas proof test a...

• July 17. 2023

JST new design of Lockdown screw packing is made from one PTFE ring and two copper rings. PTFE ring is able to lower the holding force and friction, thus lower the torque. Meanwhile, two copper rings can better protect the LDS body not to be damaged during the twisting and rotating process. JST has conducted the test to qualify the PR2 performance of 1.51 inch LDS packing seal at L-X -46℃~177℃ ( -...

• August 11. 2023

Lockdown Screw packing seal is usually made of an HBNR compression packing element with molded metal end caps. But JST has developed a lockdown screw packing seal which is made of one filled PTFE and two cooper end caps. It is the sealing between wellhead members in a wellhead, including a seal element and a lockdown member. The seal is attachable to either one of the wellhead members by coup...