Landing Sub

No-go device

The landing sub acts as a no-go for landing and activating a multifunction circulating tool or other devices. Typically, this operation occurs on a liner-top polished-bore receptacle or on another similar internal-diameter restriction.

The unit is manufactured from one piece with box-up/pin-down drillpipe connections and comprises a central set of large, tapered, fluted outer lugs.


  • Landing on liner top, polished-bore receptacle or other suitable shoulder
  • One-piece, rugged construction
  • No restriction in internal diameter


  • Design to be run below a multifunction circulating tool and act as a no-go device for activating the tool
  • Fluted body for generous fluid bypass

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