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Multi Activation Circulation Sub

(Patents Pending)

OILSCO Technologies’ Multi Activation Circulation Sub is a Next-Generation (nxg) solution for the global drilling industry.

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Multi Activation Circulation Sub

Next GenerationA technological innovation that adds new efficiency to your drilling operations, its genius lies in its simplicity. Rapid activation from the drill floor. No breaks required to the drill string and no ancillary kit needed – saving you valuable time. And an unlimited activation capability every time. A new way of dealing – quickly and effectively – with lost circulation zones and the build-up of cuttings beds.

Our Multi Activation Circulation Sub has been designed not only to overcome the most complex circulation challenges – but to do so with optimum efficiency and total reliability as part of your bottom hole assembly. It is a breakthrough technology: one that eliminates unnecessary rig downtime to save you time and money.

Key Features:

An innovative internal mechanism allows flow ports in the outer body to be opened and closed from the surface, simply via the operation of the mud pump controls by drilling personnel.

Upon activation, a shut-off mechanism closes the tool inner bore, allowing lost circulation material to be pumped out through the side ports. It means MWD and LWD equipment located below the tool are protected – at all times.

Our Multi Activation Circulation Sub bypasses the need to break the drill string as part of the process: no ‘ball’ or ‘dart’ devices required.

It can be activated (opened or closed) as many times as you require during an individual drilling operation.

Its activation/deactivation status – whether open or closed – can be instantly gauged on the drill floor.


  • Lost circulation
  • Hole enlargement applications
  • Coring applications
  • Well cleanout
  • Wellhead cleanout
  • Horizontal and directional drilling
  • Surge protections