Pump Out Choke Probe

The DTI CT Pump Out Choke Probe is run below the Hydraulic Knuckle Joint in the Multi-Lateral Entry System. The Pump Out Choke Probe is generally sized so that the Hydraulic Knuckle Joint is prevented from fully articulating inside the main wellbore casing. Once the lateral wellbore is located the Pump Out Choke Probe moves into the casing window allowing the Hydraulic Knuckle Joint to fully articulate. This opens the bleed ports and provides a pressure signal that the lateral wellbore has been located.

A pinned piston sub acts as a choke to enable activation of the hydraulic toolstring. When the lateral has been successfully accessed, the choke sub can be over pressured and pumped out into the probe body which also acts as a catcher sub. Higher flow rates can then be pumped through the toolstring for cleaning and stimulation applications.