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Landing String Communication thru Pressure Variance

IP.com Disclosure Number: IPCOM000246171D
Publication Date: 2016-May-12
Document File: 1 page(s) / 127K

Publishing Venue

The IP.com Prior Art Database

Abstract

This methodology is to use the variation in surface applied pressure to the Control System inside the Riser / BOP (Blow Out Preventer) Stack on the seabed via the Choke, Kill or Booster line to send commands to the tool with the potential to respond in a similar manor back to the surface for status update.

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Landing String Communication thru Pressure Variance

Subsea Control Systems have historically always used an umbilical as the method of communication with the latest generation of landing string control systems exploring umbilical-less solutions. These different methodologies work using many varied approaches to get large amounts of data to and from the equipment. This technology would work either work alongside the existing traditional umbilical control system or with the new generation of umbilical-less solutions.

This methodology is to use the variation in surface applied pressure to the Control System inside the Riser / BOP (Blow Out Preventer) Stack on the seabed via the Choke, Kill or Booster line to send commands to the tool with the potential to respond in a similar manor back to the surface for status update.

The BOP stack would close around the tool and create a trapped volume, the rig pumps or extra modulated pump would then send pressure pulses to this trapped volume and the control system would have a series of pressure transmitters to read the variation in pressure as a set command and the tool would carry out the desired function. On completion of the function, the tool could send pressure pulses back using a modulator to the trapped volume in the BOP stack which would be read either at surface or from the BOP pressure gauge and a surface control unit would interpret these and inform the operator of the current status.

Depending on the criticality of the functi...