Pressure relieving transition joint

摘要

A transition joint for coupling a parent wellbore to a branch wellbore is provided. The branch wellbore extends outwardly from a window in the parent wellbore. The transition joint comprises a tubular string and a plurality of apertures configured to allow fluid flow into the tubular string. The tubular string comprises an upper portion configured to be contained in the parent wellbore upwards from the window, and a lower portion configured to be contained in the branch wellbore. The tubular string also comprises a plurality of apertures configured to allow fluid flow into the tubular string from a formation proximate to the window. The plurality of apertures are arranged on the tubular string along a half of the tubular string configured to face a pressure gradient between the formation and the branch wellbore. The plurality of pressure relief valves are coupled to the apertures in the tubular string, and each of the pressure relief valves is configured to be autonomously actuating. The plurality of pressure relief valves are configured to reduce propagation of particulate matter into the parent wellbore and the branch wellbore when the plurality of pressure relief valves are open. 2s