Flexible 70 Shore HSN Elastomer O-Rings for Downhole Drilling Equipment

Product Overview

This listing covers black HNBR / HSN O-rings with a listed hardness of 70 +/- 5 Shore A for downhole equipment replacement review. Match the dimensions and groove specification to the tool drawing. Confirm the specific compound against the fluid, gas, temperature and pressure conditions; a softer seal does not compensate for an incorrectly machined groove.

Material Comparison: HNBR vs. Others

HNBR vs NBR (Standard Nitrile):

Compare the specific NBR and HNBR compounds against the actual fluid, exposure and temperature requirements. Polymer family names alone do not establish a fixed temperature limit or chemical qualification.

HNBR vs FKM (Fluoroelastomer):

Compare the specific HNBR and FKM compounds against fluid, gas, temperature, movement and mechanical-property requirements. Confirm the selected formulation rather than assuming family-wide superiority.

Technical Parameters and Specifications

Company Profile

Established in 2013, Shanghai Qinuo Industry (SHQN) specializes in the engineering and manufacturing of high-performance rubber seals for the Oil & Gas industry.

Our production base in Nantong is equipped with over 30 advanced vulcanizing machines, delivering a monthly capacity of 20 tons (40,000 lbs) across 20+ product categories. Strategically located near Shanghai’s major air and sea ports, we ensure streamlined logistics and reliable global delivery.

Under our registered brands Royal Way® and SHQN®, we remain committed to our core principle: "Quality for Stability, Innovation for Progress." We provide the energy sector with durable, precision-engineered sealing solutions you can depend on.

FAQ

Question: What is the benefit of 70 Shore A hardness over 90 Shore A?
Answer: This listing specifies 70 +/- 5 Shore A. Select hardness against the approved compound and groove design; hardness alone does not establish sealing or pressure performance.

Question: Is HSN the same as HNBR?
Answer: Yes, HSN (Highly Saturated Nitrile) and HNBR (Hydrogenated Nitrile Butadiene Rubber) are different names for the same chemical elastomer. Both terms are used interchangeably in the oil and gas industry.

Question: Can these O-rings be used with sour gas (H2S)?
Answer: Sour-service suitability requires qualification of the specific compound for the gas composition, temperature, pressure and exposure conditions. The HNBR / HSN designation alone is insufficient.

Question: How should I store HSN O-rings to maximize their life?
Answer: Store them in a cool, dry place, ideally in a sealed bag. Keep them away from direct sunlight, UV light, and ozone-producing electrical motors to prevent premature aging.

Question: Are these O-rings suitable for high-temperature steam?
Answer: Confirm the specific compound against steam pressure, temperature and exposure duration before use; this listing does not establish a universal steam limit.

Question: Can I use 70 Shore HSN for dynamic (moving) seals?
Answer: Review movement, speed, lubrication, clearance and wear requirements against the selected compound and tool design. Confirm dynamic suitability for the actual assembly.

Question: How do I identify if an O-ring is HNBR rather than standard NBR?
Answer: Confirm the supplied compound reference and material documentation. Appearance and an informal heat comparison do not reliably identify the compound; use an agreed laboratory identification method if required.

HNBR Compound Review for Downhole Gas Exposure

For downhole replacement orders, provide the tool reference, groove drawing, seal dimensions and the 70 +/- 5 Shore A requirement. Identify the fluid and gas composition, continuous and peak temperature, working pressure and exposure duration. Include pressure-release conditions and any sour-service or decompression qualification requirements. Confirm the approved compound and inspection documentation before substitution.