Rotary Joint Hydraulic Decoking Systems

Features and Benefits

• Two flange sizes – The rotary joint is available with 125 mm (5 in) 250 PN (1500 lb) or 400 PN (2500 lb) inlet flanges and with optional 150 mm (6 in) Unibolt^® or compact flange connections to match the drill stem connector
• Cast single-piece gooseneck eliminates welds and reduces corrosion
• Rotary joint drive options –
  • Air piston motor
  • Hydraulic
  • E-motor (with VFD)
• Dual Seal
  • Increased reliability with a four-year design life
  • Switching from the primary seal to the secondary seal allows for planned maintenance in the event of a seal failure
  • Simple installation reduces downtime
  • Retrofit option for all Flowserve rotary joints
• Rotary joint upgrade options
  • Convert packing to seal rings
  • Convert vertical air motor to horizontal motor with right angle gear
  • Upgrade Unibolt coupling to direct connect with drill stem
  • Add second bearing for right angle drive shaft
  • Convert to integral gooseneck and support cage
  • Add rotary joint stiffeners

Operating Parameters

Two models available:

• Pressures to
  • 205 bar (3000 psi)
  • 430 bar (6230 psi)
• Speeds of 2 to 17 rpm
• Rotates 30 m (100 ft) to 45 m (140 ft) drill stem lengths
• Carries axial hydraulic loads in the magnitude of 190 000 J (140 000 ft-lb) through its main thrust bearing
• Seals hydraulic pressure against atmosphere

^®Unibolt is a registered trademark of Cameron International Corporation