Patent ID: 8909479
Filing Date: 2014-12-09
Classification: E03B,E21B,F17D,G01M

Abstract:
1. A method for investigating and quantifying leakage rate of a fluid between a first pipe and a second pipe, the first pipe being surrounded by at least a portion of the second pipe, the pipes being arranged in a well in a ground, said method including the steps of: installing a measuring arrangement including a flow meter and a pressure gauge in fluid communication with an annulus surrounding a leakage site in the first pipe, the pressure gauge being connected to pressure sensors arranged to measure a pressure difference between the annuli; providing by means of a pressure-regulating valve arranged downstream of the measuring arrangement a constant pressure difference between the annuli surrounding the leakage site; and conveying through the measuring arrangement fluid in gas phase from the annulus connected to the measuring arrangement, said annulus being utilized as a separation chamber for gas and liquid.