Hydril FS™ 21-500 Marine Riser Diverter

Redefining Rig Protection

Hydril diverters are known for significantly enhancing safety and rig protection.  The FS 21-500, in particular, is fundamentally simplistic, designed to avoid the functional complexities that increase the chance for human error and equipment breakdown.  With models available for use with 49-1/2" and 60-1/2" rotary tables, the FS 21-500 is readily adapted to fit virtually any rig configuration. Moreover:

  • It closes on the open hole, eliminating a serious safety gap caused by cartridge inserts.
  • It is used in conjunction with the Seal-All™ Diverter Insert to enhance safety further.
  • The patented integral valve design eliminates sequencing of diverter valves and simplifies the control system's need to operate the diverter system.
  • There is no stagnant vent line space, caking of solids or ice formation that could obstruct or shut off the flow.
  • Both models are rated for 2 million lbs up or down loading.

Selected Engineering Data*

FS 21-500 (49-1/2" Rotary Table)
System Of Measure U.S. Metric
Bore Size 21.00 (in.) 533 mm
Working Pressure 500 psi 35 bars
Closing Pressure 1,500-3000 psi 103-207 bars
Seal Off Range 13.38 (in.) to CSO 340 mm to CSO
Closing Chamber Volume - Total 25 Gal 94.6 L
Opening Chamber Volume 2.6 Gal 9.8 L
Weight (W/O Housing) 22,000 lbs. 10,000 kg
Vent Outlet Size (Nominal) 12.00 (in.) 304.80 mm
Flowline Outlet Size (Nominal) 12.00 (in.) 304.80 mm
Nominal Rotary Table Size 49.5 (in.) 1,257.30 mm
Bottom Connection API 21.25 (in.) 2,000 psi Studded API 539.80 mm 137.9 bar Studded
 
FS 21-500 (60-1/2" Rotary Table)
System Of Measure U.S. Metric
Bore Size 21.00 (in.) 533.4 mm
Working Pressure 500 psi 34.5 bar
Closing Pressure 1,500-3,000 psi 103 - 207 bar
Seal Off Range 16.00 (in.) to CSO 406.40 mm
Closing Chamber Volume - Total 65.1 Gal 246.4 L
Opening Chamber Volume 4.6 Gal 17.4 L
Weight (W/O Housing) 46,500 lbs. 21.10 metric tons
Vent Outlet Size (Nominal) 16.00 (in.) 406.40 mm
Flowline Outlet Size (Nominal) 16.00 (in.) 406.40 mm
Nominal Rotary Table Size 60.5 (in.) 1,536.70 mm
Bottom Connection API 21.25 (in.) 2,000 psi Studded API 539.80 mm 137.9 bar Studded

* See brochure for additional data

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