• 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 15. 2022

1. Wellhead Casing Structure Wellhead casing usually consists of four-way, casing hanger, top wire assembly, flange parallel gate valve, connector, pressure display mechanism, etc; 2. Working principle of Rubber Seal The wellhead casing consists of the wellhead casing body, BT seal, casing hanger, dovetail seal , lockdown screw seal and sealing gasket. The casing hanger seat is hung on the steps o...

• December 06. 2022

Structure of casing head The wellhead casing is composed of four-way, casing hanger, jacking assembly, flange type parallel gate valve, connector, pressure display mechanism, etc; Metal and rubber seal of wellhead casing The metal and rubber seals of the casing head are composed of the wellhead casing body, BT rubber seal, upper metal seal component, lower metal seal component, casing hanger, dove...

• 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...

• 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...