Actuator systems also can be used to operate manifold and pipeline sled valves. Electric manifold valve control is especially attractive in systems where control modules can be eliminated from the manifold. The technology offers precise position control and can be applied subsea without a hydraulic umbilical, providing huge cost-saving potential.
Basing the system on local energy storage with rechargeable batteries enables cost-efficient retrofit scenarios like those of Statoil’s Norne system in the North Sea. In the Norne system, electrical operation replaces manually and hydraulically operated valves and chokes.
This modification results in better response times for the chokes, enables free routing of existing and new infield wells and liberates hydraulic lines in an existing umbilical. Capital expenditures for the field extension are reduced significantly.