Secondary Seals

 Secondary seals are used to seal around the production casing stub in the bottom of the bowl of the tubing head. Leland offers a wide variety of seals below:
 
PE Secondary Seal is installed in the bottom bowl of a casing spool or tubing spool and retained with a snap wire. The seal is energized when the spool is installed over the casing stub and the flange connection is finished. It is available not only in standard API casing sizes, but also nonstandard casing sizes, and  it can operate safe and reliable under 5000 psi.
 
 
4-O Secondary Seals are installed in casing or tubing head spools with the BG lower internal connection. These bushings are available for applications up to 5,000 psi working pressure.
 
O-O Secondary Seals consist of two elastomer seals which are installed in
casing or tubing head spools. The OO shape design offer great flexibility to all
internal and external sizes, in casing and tubing head spools.