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Shell is dedicated to making wells safer through investment and research into new and effective drilling technologies.
One of these breakthrough technologies is the CID, or Collapsible Insert Device.
Inside its protective outer housing, the CID is made up of the Upper Electronic Housing Mandrel which contains an energy source, a receiver and an encrypted trigger,
and the Lower Insert which contains three pyrotechnic devices.
Incorporated directly into the casing string, the CID receives real time signals from the vessel through acoustic repeaters located on the casing string.
During the drilling process an uncontrolled release of hydro-carbons may occur in exceptional cases,
the crew members follow conventional methodologies to deal with the uncontrolled flow.
In the unlikely event that these methods fail and in a worst case scenario the Blow Out Preventer, or BOP, also fails to stop uncontrolled flow,
the drilling operator activates the CID from the control panel.
With a simple push of a button, the pyrotechnic devices are triggered, generating a collapse of the interior pipe
While maintaining casing integrity and significantly reducing, if not stopping, the uncontrolled flow of hydrocarbon into the environment.
The collapse of the interior pipe is a three-sided collapse, which completely stops or substantially reduces the flow.
The crew can now go into the well bore and either mill out, or drill out the collapsed insert.