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Through Tubing Rotary Drilling (TTRD)

Production from new drainage points from subsea wells, by means of sidetracking through existing completions into new reservoirs, has traditionally been time consuming and costly. The development of a Through Tubing Rotary Drilling (TTRD) technology provides a more cost-effective method to increase the production from subsea wells, compared to drilling and completing new wells.

TTRD technology enables:

  • Safer operation (no additional tree required and less tubular handling)
  • No pulling of the tubing or subsea tree, saving time and cost 
  • Deeper kick-off point (saves drilling and completion costs)

TTRD benefits:

  • Lower cost than conventional drilling operation 
  • Increases income from each well 
  • Extends the life of the well 
  • May enable production from marginal fields 
  • Maximizes production from mature fields
  • Decreases operational time (typical operation three weeks, 1000–1500m horizontal reservoir drilling)


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