CPC E21B 43/121 (2013.01) [F04B 47/12 (2013.01)] | 7 Claims |
1. A method for synchronizing and controlling operating states of a plurality of plunger lifts sharing a plurality of production lines, using a multi-plunger lift control device, the method comprising:
setting, using a plunger lift synchronization setting unit, operation priority of the plurality of plunger lifts so that production stages of the plurality of plunger lifts do not collide;
monitoring, using a stage monitoring unit for each plunger lift, current production stages of the plurality of plunger lifts; and
synchronizing and controlling, using a plunger lift logic control unit, production operations of the plurality of plunger lifts based on the operation priority set by the plunger lift synchronization setting unit and stage monitoring information received from the stage monitoring unit for each plunger lift,
wherein the production stage comprises:
a drop stage of dropping a plunger to a bottom of a reservoir, in which an oil and/or a gas is stored, through a tubing;
a shut-in stage of waiting until an internal pressure of the tubing reaches a set producible pressure;
a lifting stage of lifting the plunger to a ground using an internal pressure difference between the tubing and a production line by opening a production valve installed on a production line on the ground connecting the tubing and an external storage; and
an afterflow stage of discharging foreign substances in the tubing,
wherein the plunger lift logic control unit is configured to synchronize and control the production operations of the plurality of plunger lifts so that two or more plunger lifts of the plurality of plunger lifts do not perform the lifting stage and the afterflow stage at the same time,
wherein the plunger lift logic control unit is configured to generate a control logic for each of the plurality of plunger lifts based on the operation priority set by the plunger lift synchronization setting unit,
wherein the control logic for each of the plurality of plunger lifts includes at least a priority of the lifting stage and the afterflow stage among the production stage of each of the plurality of plunger lifts,
wherein the plunger lift logic control unit is configured to perform the control logic for each of the plurality of plunger lifts, and
wherein a control logic of a specific plunger lift included in the plunger lift logic control unit synchronizes and controls the production operations of the plurality of plunger lifts with reference to a control logic of another plunger lift before opening a specific production valve controlled by the specific plunger lift so as to perform the lifting stage and the afterflow stage, to thereby prevent a collision between the production stages of the plurality of plunger lifts.
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