SYSTEM OF CLUSTER WATER PUMPING TO FORMATION Russian patent published in 2013 - IPC E21B43/20 

FIELD: oil and gas industry.

SUBSTANCE: system of cluster water pumping to a formation includes a cluster pump station, a unit of a comb with gate valves, water conduits, gate valves arranged in a wellhead zone of injection wells, flow metres installed on the comb unit and/or in the wellhead zone of injection wells, the operation of which is provided at different working pressures with stops of the cluster pump station, a cluster controller with an information transfer channel from flow metres to the cluster controller, which has the possibility of opening and closing gate valves on the unit of combs and/or gate valves arranged in the wellhead zone of injection wells. According to the invention, cluster controller is equipped with a programmed interval timer having the possibility of sending opening or closing signals of gate valves to exclude freezing in a water conduit at minimum water flow velocity at stop of cluster pump station with the interval and duration of the opening, which are determined by empirical method depending on ambient temperature, diameter of water conduits, their heat insulation and composition of liquid in them for periodic pumping of one to three water volumes in the same water conduit.

EFFECT: improving operating reliability of a system owing to excluding freezing of water conduits.

3 cl, 5 tbl, 1 dwg