Check valves allow each well to be routed into one or more of several Manifold
Lines. There will be at least one for each process train plus additional Manifolds for
test and balancing purposes. In the diagram we show three: Test, Low Pressure and
High Pressure Manifolds. The test manifold allows one or more wells to be routed to
the test separator. Since there is only one process train, the HP and LP manifolds
allow groups of HP and LP wells to be taken to the first and second stage separators
respectively. The chokes are set to reduce the wellhead flow and pressure to the
desired HP and LP pressures respectively