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Guangzhou JST Seals offers downhole sealing solution and products. Bottom hole assembly (BHA) tools (such as impactors and jars) need to be sealed to protect the tool hydraulic system from the impact of abrasive drilling mud and cuttings in the hole. Measurement while drilling (MWD) tools sometimes need high-temperature sealing solutions. This field operation is expensive, If seal failed it would ...
The guide strip is mainly used in the hydraulic cylinder and pneumatic cylinder. Because of its high-quality performance, it is also widely used in other moving system at this stage. Primary requirements: Support and positioning: the piston and piston rod are axially supported in the cylinder barrel, and the movable positioning between equipment is realized. To isolate the piston and play a certai...
As one of the main components of valves and pressure pipelines, pressure dissolvers, boilers and other equipment, ball valves are used to control the flow or cut-off of media. They are widely used in various industries such as LNG, electric power, light industry, construction, metallurgy and so on. As a low cost, rubber O-ring (hereinafter referred to as O-ring) is applicable to be installed in va...
The number of reliable sealing solutions for Low-Temperature Service in LNG plants is limited. The two main polymers currently used are PTFE spring energized seal or UHMW-PE seals. The challenge of using liquefied natural gas The leakage of LNG (liquefied natural gas) at low temperature is dangerous to the health and safety of workers and the operation of the plant. The problems such as toxicity, ...
JST develops and supplies downhole tool seals for the oil and gas industry. We have developed and improved PTFE, NBR, HNBR, FKM, peek and other materials. These materials have high pressure resistance and good sealing performance, and have passed the hydrogen sulfide immersion test and explosion-proof test. Generally speaking, sealing materials suitable for downhole harsh conditions are not easy t...
With the development of industry, the requirements for sealing rings are increasing. Various new sealing rings have replaced some traditional ones. Among them, the spring PTFE sealing ring is widely used because of its good sealing effect and normal operation under certain adverse conditions. The spring PTFE sealing ring is composed of the spring covered with polytetrafluoroethylene. As shown in F...
Lip seal, also known as spring energized ring, is widely used in various fields because of its excellent sealing performance. In the production of valves under special working conditions, rubber O-rings cannot meet the requirements, so other sealing schemes shall be selected instead. The advantage of lip seal is that it can realize "self sealing" like an O-ring, that is, its sealing performance in...
Vee packing is used for downhole equipment in oil field. JST provides chevron and HNBR Vee packing. The Vee packing group is composed of a top ring, a bottom ring and several intermediate center rings. V-Packings is ideal for medium and heavy duty applications. V-packing can withstand low pressure and high pressure when working under the most extreme conditions. JST standard Vee Packings materials...
1. Tensile property of valve stem sealing material Tensile property is the first property to be considered for sealing materials, including tensile strength, constant tensile stress, elongation at break and permanent deformation at break. The tensile strength is the maximum stress at which the specimen is stretched to fracture. The constant elongation stress (constant elongation modulus) is the st...
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