Patent ID: 6227301
Filing Date: 2001-05-08
Classification: E21B

Abstract:
A xmas tree for use in a variety of well applications, said xmas tree comprising:a generally cylindrical xmas tree housing defining a generally cylindrical bore, a separate xmas tree valve block disposed within the cylindrical bore of said xmas tree housing and engaged with the xmas tree housing, and a xmas tree cap for engaging with one of said valve block, and said xmas tree housing, the xmas tree cap being coupled to a rig via various flowline and umbilical services to facilitate control of the xmas tree in conveying fluids between surface mounted process facility and a downhole reservoir,the xmas tree valve block having a main production bore and at least one auxiliary bore, the main production bore having at least two valves axially spaced therein, said valves being operable to seal the main production bore and provide well barriers, said at least one auxiliary bore providing an annulus access bore and containing a single valve operable to seal the access bore and provide a well barrier in the annulus access bore.