HNBR O-Ring 90 Shore A Abrasion Resistant H2S Resistant Seal for Drilling Tools

HNBR O-Ring 90 Shore A Abrasion Resistant Seal for Drilling Tools

HNBR (HSN) O-rings at 90 Shore A built for drilling tools that see abrasive mud, heat, and often sour gas. The hydrogenated nitrile backbone takes far more wear and temperature than standard NBR, and it is specified for H2S and CO2 service common in drilling — so it stays sealed where nitrile breaks down.

Features

• 90 Shore A resists abrasion from sand- and solids-laden mud
• Rated for H2S and CO2 sour service in drilling environments
• Higher heat ceiling than NBR with better tear and cut resistance
• Better ozone and weather aging than standard nitrile
• Available with anti-extrusion fillers for high-pressure glands

Applications
Mud pumps and fluid ends, top drives, measurement-while-drilling (MWD) and logging-while-drilling (LWD) tools, drill-string and downhole components, blowout preventers, and wellhead equipment exposed to abrasive and sour drilling fluids.

FAQ

Q: Why HNBR 90 instead of NBR for drilling tools?
A: Drilling tools run in abrasive mud with heat and frequently H2S or CO2. HNBR wears far better than NBR, takes more temperature, and is rated for sour gas — so it lasts through the run where nitrile fails early.

Q: Is it rated for H2S and sour service?
A: Yes. HNBR is specified for H2S and CO2 environments typical in drilling. Tell us the gas concentration and temperature so we pick the compound and cure that meets the duty.

Q: How does it stand up to abrasion?
A: The 90 Shore A hardness plus the hydrogenated backbone gives strong cut, tear, and wear resistance in sandy, solids-laden mud. For high-pressure glands add anti-extrusion back-up rings to stop the seal being pushed into the gap.

Q: When would I pick FKM over HNBR?
A: FKM wins on heat and broad chemical resistance, but it is weaker on abrasion and cold flexibility. For abrasive, sour, high-wear drilling duty HNBR is usually the better all-round choice.

Q: What sizes and options are available?
A: Molded AS568 and ISO 3601 sizes are stocked, with custom HNBR blends and anti-extrusion fillers available for high-pressure, high-velocity drilling applications.