However, the idea stands. Can you imagine the time it will take for expanding gasous and liquid compounds to travel 1 miles at constant changing pressure. I would give it at least 3 days to reach steady state. Be patient, and check back in a week. You will find $. . . that is if the CEO stop talking crazy things of course. Yours truly.
Why not just throw a metal ball with holes inside the tubing to stabilize the flow rate. the size and shape can be calculated for effectiveness and efficiency without having the ROV to slowly close and open the valve. Too simple for an MBA mind.