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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...
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...
We recently got a quality complaint from customer that the hydraulic rod was burn during working, see below photo. After analysis with our engineering team, we call this “Diesel Effect”. We’d like to discuss about this. What is the “diesel effect”? The diesel effect occurs in a hydraulic cylinder when air is drawn past the rod seals, mixes with the hydraulic fluid and explodes when pressurized. Ho...
V-packings, also known as Vee packing seal and Chevron V-packings, or V stack, is a kind of stacked seal. It is combined by a male adapter, a female adapter and a number of intermediate V rings. V-packings are designed to be used in applications such as hydraulic cylinders, fracturing pumps or well downhole. Facing different working condition (temperature, pressure, media), the raw material differ...
The EFP 4-inch fracturing pump valve insert seals produced by JST uses modified TPU material, it is the consumables of fluid end valves and seats, which has excellent wear resistance and corrosion resistance. The frac pump valve insert seals are fluid end consumables, it plays important role in oilfield. It is mainly used in oil field fracturing truck, well washing truck, cement truck, plumger pum...
JST manufactures a variety of P seals. The standard P Seal is a one-piece molded seal utilizing molded-in anti-extrusion device. This design enhances assembly by eliminating the loose anti-extrusion devices used in other designs. P seal can be used to seal rough casing and tubing. The standard material is HNBR85 to 90 durometer, and the material should be suitable for PU or LU temperature rat...
Well Service Fracturing Pump Packing Seals are commonly used in high-pressure mud pumps and fracturing pumps, as a high-speed reciprocating dynamic seals. Its main function is to prevent plungers from leakage in high-speed reciprocating. Some special working conditions are taken into consideration when designing its structure and material, which make it apply to fracturing fluid, mud mediums and s...
Rod seals are the most important seal within any hydraulic sealing system, which are used to prevent leakage of hydraulic fluid to the outside of the sealing system. Rod seals should be paired with an appropriate wiper and gland housing design to ensure correct operation. Rod seals are often the critical factor in ensuring that a hydraulic cylinder operates at peak performance. Leakage throug...
The back up ring, also called anti extrusion ring, is aptly named as they do just that: they back-up an O-ring. The purpose of using the backup ring is to prevent the O-ring from extruding into the sealing gap under the system pressure. The structure of the increased back up ring will bear much higher pressure than using the O-ring alone. The profile shape of the back up ring is usually rectangula...
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