Rotary Seal Blog

5,000 psi seal test directed at rotating cement head operating conditions

One of the critical steps in completing an oil or gas well is pumping cement into the well annulus that is located between the casing and the bore of the well. Among other things, cementing provides zonal isolation, and provides support and protection for the casing. Rotation of the casing string during the cementing job […]

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A new chapter on side port swivels has been added to our rotary seal handbook

A new chapter titled “Using Kalsi Seals in side port swivels” has been added in the Application Engineering section of our rotary seal handbook. This new, well-illustrated chapter describes the best practices for designing high pressure side port swivels for use with Kalsi-brand rotary shaft seals. The suggested swivel design incorporates Kalsi Engineering’s patented floating […]

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40 day 5,000 psi rotary seal test with 0.010” runout

[Posted on November 12 2014 by:John E. Schroeder] Kalsi Engineering is pleased to announce a new benchmark in high pressure rotary seal performance. A pair of PN 655-4-114 Extra Wide Enhanced Lubrication Seals have been tested at 5,000 psi for 40 days against a 2.75” (69.85mm) shaft rotating at 252 ft/minute (1.28 m/s) with 0.010” […]

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A new advancement in axially constrained seals

After several years of development, Kalsi Engineering is pleased to announce a new line of 0.335” (8.51mm) cross-section axially constrained seals: The 673 series. This new series offers improved abrasive exclusion performance over 462 series seals in conditions where the pressure of the abrasive environment is greater than the pressure of the seal lubricant. It […]

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RCD seals that do not require lubricant overpressure

Kalsi Seals-brand rotary seals have been used in rotary control devices (RCDs) for a number of years. Prior to this year, however, usage has been restricted to lubricant overpressure type RCDs, where the lubricant supply provides seal lubricant at a pressure that is several hundred psi greater than the pressure of the wellbore. A pair […]

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Plastic lined Kalsi Seals reduce breakout torque at 1,000 psi

Some large diameter equipment, such as hydraulic swivels and passive rotating control devices (RCDs), has limited available torque to initiate rotation. When limited available torque is combined with higher pressure sealing requirements, rotary seal breakout torque can exceed available torque. Kalsi Engineering has developed and tested two technologies that significantly reduce the breakout torque of […]

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Information for Choosing Rotary Shaft Seal Materials

[Posted 2 April 2014 by:John E. Schroeder] At Kalsi Engineering, we offer a variety of elastomer material choices for the manufacture of the correct rotary shaft seal for your application. Each elastomer has different strengths and weaknesses when used as a seal. Understanding the basic resistive qualities can provide a guideline for selecting the type […]

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