Summary
The process control system (PCS) of an offshore installation in the UK was communicating with the subsea Master Control Station (MCS) on a cyclic basis. This was causing unnecessary movement of subsea choke valves and alarm floods.
Modification to the PCS logic was required to ensure that communications between the PCS and the MCS are configured such that the subsea choke valves are only moved when commanded by the operator.
We were engaged to design, specify, test, and commission the modifications to the PCS.
Our Scope
Develop the project requirements and performance criteria including cost estimation and schedule definition on behalf of the client.
Specify the modification in sufficient detail such that all services required to deliver the scope of work can be determined.
Act as the design authority for the project providing technical direction and control, including management of the PCS and subsea system suppliers.
Responsible for developing the factory acceptance testing and offshore commissioning strategy, including the development of all procedures.
Act as the commissioning authority, witnessing the execution of the modifications offshore and acceptance on behalf of the client.
Result
A cost-effective solution was developed that took into consideration the current system limitations and obsolescence issues.
The scope was delivered on time to meet the planned shutdown window, with the scope executed and handed over with no impact to installation operations.