High Pressure Seals

High Pressure, High Temperature Seals for Downhole Applications

Under pressure, laboratory tests have demonstrated that Kalrez® perfluoroelastomer parts can help reduce maintenance, and avoid unplanned downtime.

Kalrez RGD seal requirements

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DuPont™ Kalrez® parts include high pressure, high temperature seals (HTHP seals) that can provide long-lasting performance in a spectrum of oil and gas industry uses.

Kalrez® perfluoroelastomer (FFKM) parts are resistant to 1800 chemicals and solvents, and even resist sour multi-phase fluids. They retain high levels of elasticity and recovery, even after long-term exposure to elevated temperatures.


Improved Productivity

More durable, more broadly resistant high-pressure seals are designed to last longer, limiting unplanned downtime, and providing the potential to extend planned maintenance intervals.

Kalrez® parts have been field-proven across the oil and gas industry and are found in such applications as:

  • Tubing to packer seals.
  • Subsurface safety valves.
  • Logging boots.
  • Casting tie-back seals.
  • Survey tool seals.
  • Slip-joint seals.
  • High pressure, high temperature seals (HPHT).

Rapid Gas Decompression Performance

Kalrez® parts for HPHT downhole environments provide outstanding rapid gas decompression (RGD) resistance.

In rigorous third-party laboratory testing for rapid gas decompression (RGD) resistance, Kalrez® 0090 AS568-312 O-rings, received the best possible rating of 0000 per the NORSOK M-710 Rev 2 standard.

To achieve a “0000” rating, the seal must have no internal cracks, holes or blisters, of any size, after rapid gas decompression testing. Some competitive seals developed multiple internal cracks during test cycling.

V-rings That Endure

When it comes to oil production, Kalrez® V-rings that were recovered after six years of service in a producing well showed almost no signs of wear. The aged V-rings were indistinguishable in physical properties and appearance from un-aged control. Kalrez® V-rings can help provide more uptime and lower maintenance costs.

Durability That Makes Production More Efficient

Kalrez® HPHT seals can help stretch the mean time between repair (MTBR) and lower maintenance costs. Their long-term resistance to the harshest chemicals and the highest temperatures makes them resistant to swelling and embrittlement.  Embrittlement is a leading cause of premature seal failure and costly production downtime. Whether it’s O-rings, custom shapes or Kalrez® KVSP™ valve stem packing, Kalrez® seals can help improve productivity, control fugitive emissions and reduce costly seal failures.

Kalrez® Rapid Gas Decompression Testing

Kalrez® Rapid Gas Decompression testing video demonstrates how Kalrez® parts stand up to severe downhole conditions from high pressures and temperatures, to aggressive sour gas and corrosive fluids.


  • Downhole Completion Tool

    Kalrez® 0090 parts, with its high pressure, high temperature (HPHT) properties, chemical resistance and superior rapid gas decompression (RGD), has reached a milestone in extremely aggressive environments in downhole applications.

  • Abstract from Oil & Gas Webinar

    DuPont Performance Polymers presented a webinar and white paper which explores the challenges and solutions for sealing parts in Oil and Gas applications.


  • Kalrez® parts provide reliable performance in harsh processing environments.
  • Kalrez® Perfluoroelastomer Parts

    DuPont™ Kalrez® perfluoroelastomer (FFKM) parts provide reliable, long-term sealing performance in the harshest processing environments, due to their exceptional chemical and thermal resistance.



  • O-rings for Gas Sweetening Valves

    Kalrez® 7090 perfluoroelastomer parts offer an excellent combination of chemical, Rapid Gas Decompression (RGD) resistance , and high temperature resistance for O-ring applications in gas sweetening valves that handle glycol-based solvents.

  • O-rings in Pressurized Water Reactor

    Due to the combination of extreme temperature, pressure and chemical environments, Kalrez® 0090 was used in a series of mechanical seals employed in the operation of boiler feed pumps for pressurized water reactors.