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.

View Media

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.


Fluid and Material Handling Application Testing


  • 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® perfluoroelastomer parts

    Kalrez® perfluoroelastomer parts (FFKM) resist over 1,800 different chemicals and withstand temperatures up to 327ºC. This elastomer is widely used in demanding chemical processing and semiconductor manufacturing, as well as pharmaceutical, aerospace and oil & gas applications.



  • 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.

  • 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.