Halliburton’s EquiFlow Autonomous Inflow Control Device (AICD) allows for the most-efficient recovery of oil in steam-assisted-gravity-drainage (SAGD) producers. Like all AICDs, EquiFlow has no control lines, but it is unique in that it works without any moving parts and has no electronics or elastomers. The EquiFlow AICD has been flow tested with steam, varying oils, and water. It has proven reliability in the hot temperatures of the SAGD environment. EquiFlow AICDs produce heavier, more-viscous fluids, offering SAGD producers two additional benefits. First, flow is encouraged from high-oil and cold zones. As these zones flow at higher rates, heat moves in that direction, maximizing the usage of the well. Second, when a steam breakthrough occurs, the EquiFlow AICD has shown 40% less steam flow over a passive nozzle ICD. At the same flow rate, the pressure drop of steam would be more than six times higher than that of oil flow. The EquiFlow AICD has the ability to respond to changing well conditions without any action by the operator. When unwanted fluids reach the wellbore, the local AICD changes the way the fluid is moving inside. This results in a greater restriction to flow while other zones continue production with a low restriction.
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