Hollow polished rod

Hollow polished rod

Hollow polished rod is used as component of dual completion, production, heating and washing equipment.


  • Wellhead sealing;
  • Transmission of reciprocal motion from surface drive to sucker rod pump plunger;
  • Extraction of produced fluid from pump to production line through inner channel;
  • Hollow sucker rod and tubing string washing in order to remove paraffin and salt deposits and to improve efficiency of equipment set;
  • Injection of chemical agents or steam into well through hollow sucker rod string to reduce effects of complicating factors and to enhance oil recovery;


  • Rolled connection thread for high fatigue strength;
  • Thrust cones reduce bending stress at threads and ensures tight connection;
  • Nitrided hardening of outer surface;


  • Coating and rolled thread ensure extended runlife;
  • Separate lifting of produced fluid at dual completion and injection;

Order reference


Technical specification

  • Nominal size:
  • 42, 44
  • Diameter, inch (mm):
  • 1.65 (42); 1.73 (44)
  • Length, inch (mm):
  • 155 (3890), 190 (4880), 315 ( 8000)
  • Grade:
  • C, D

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