Patent ID: 7516786
Filing Date: 2009-04-14
Classification: E21B

Abstract:
1. A test plug tool for use in testing a pressure integrity of a pressure control stack mounted to a wellhead, including testing the pressure integrity of a joint between a casing and a casing support that secures the casing to a wellhead stack assembly, the test plug tool providing a high pressure seal with the casing below the joint between the casing and the casing support, the test plug tool comprising: a test plug hanger and a test plug, the test plug hanger including a hanger flange at a top end thereof and a test plug support leg that depends from the hanger flange and includes a bottom end for supporting the test plug in the casing; an axial passageway that extends through a central portion of the test plug hanger, the test plug support leg and the test plug, the axial passageway permitting pressurized fluid that may have leaked past the test plug to flow upwardly through the axial passageway; and a backpressure valve in fluid communication with the axial passageway, the backpressure valve throttling the pressurized fluid flowing upwardly through the axial passageway.