Secondary seals are inserted in the bottom of a casing or tubing spool. It is used to seal around the production casing. Apache Pressure Products carries PE and HPE secondary seals.
PE seal is inserted in the bottom of a casing or tubing spool and retained with a snap wire. The seal is energized when the spool is installed over the casing stub and the flanged connection is made up.
HPE seal is inserted into a HPE bottom preparation of most 10,000- 15,000 psi casing or tubing spools. The bottom plate is threaded into the bottom prep and is designed for high pressure applications.