Patent ID: 8534355
Filing Date: 2013-09-17
Classification: E21B,F16K,Y10T

Abstract:
1. A valve for a production liner in connection with the extraction of oil and gas, arranged to automatically shut off the flow of fluid into the production liner in the event of a gas break-through, whereby the valve comprises a valve seating containing at least one central inflow channel and one or more outflow channels from the valve, wherein the valve is constructed with a curved design equal to the shape of the outer diameter of the production liner, and is placed on the outside of the production liner, and a shut off plate is arranged in the valve, in the flowing path of the liquid flow, to cause a high velocity flow over the shut off plate's surface against the valve seat, wherein the shut off plate is adapted to seal against said valve seat dependant on the differential pressure being produced in the passing flow according to the Bernoulli principle.