SYSTEM FOR REDUCING LIQUID COLLECTION IN PIPELINE WITH POLYPHASE FLOW Russian patent published in 2008 - IPC F17D3/01 F17D1/08 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to natural gas production at off-shore underwater or floating producing installations. The system for reducing liquid collection in pipeline (10) for transporting of polyphase flow between gas producing installation (4) and processing the said gas installation (6) comprises the first catch pot for condensate and input separator (14) for separation of liquid from gas, it (the system) comprises line (30; 30', 12, 22) of recirculation, the first end of which is designed to be selectively (32; 32', 33, 33') connected to the flow on the side of output of gas from the first catch pot for condensate and input separator (14), and the second end of which is designed to be selectively (24) connected to pipeline (10) at a producing installation when withdrawn volume of gas under pressure (28; 40) is selectively (33, 33') let through from processing installation (6) into pipeline (10) at producing installation (4) to increase gas flow rate in pipeline (10) and to initiate displacement between liquid and gas to decrease liquid collection in pipeline (10). The invention also refers to implementation of the said system for control over collected liquid in the pipeline system after termination of production and prior to the next commencement of operation.

EFFECT: invention facilitates reduced collection of liquid in pipeline system with high rate of bleeding.

14 cl, 9 dwg