Patent ID: 9145753
Filing Date: 2015-09-29
Classification: E21B,Y10T

Abstract:
1. A hanger seal system, comprising: a first seal and a second seal disposed between a hanger and a hanger housing, creating an annular region filled with a first fluid; and a trapped pressure compensator (TPC) disposed in the annular region and filled with a second fluid, the TPC comprising a hollow body defining an outer profile of the TPC, wherein the hollow body is collapsible from an initial position to a collapsed position in response to a pressure in the annular region being applied to the outside of the TPC exceeding a predetermined amount; wherein the hollow body occupies an initial volume in the initial position and a reduced volume in the collapsed position; and wherein when the hollow body is in the collapsed position, the pressure in the annular region is lowered and the volume in the annular region is increased.