Patent ID: 7909103
Filing Date: 2011-03-22
Classification: E21B

Abstract:
1. A wellhead assembly, comprising: a wellhead housing; a tubing hanger having a production flow passage landed and sealed in the wellhead housing, the tubing hanger having an upper end recessed within the wellhead housing; a spool landed on the wellhead housing and having a bore and a production flow outlet extending laterally through a side wall of the spool; a tree cap landed within the bore of the spool, the tree cap having an axially extending flow passage and a production flow outlet leading from its production flow passage in fluid communication with the production flow outlet of the spool; upper and lower seals on the tree cap that seal between the tree cap and the bore of the spool above and below the production flow outlet of the spool; and an isolation tube on a lower end of the tree cap that extends into the wellhead housing and sealingly engages the production flow passage of the tubing hanger.