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Secondary Seals
Secondary Seals
Secondary Seal Assemblies come in many forms and are installed in the lower seal area of the casing spool or tubing head. They are utilized to offer redundant well security between the casing annulus and the flanged connection of a casing head, casing spool or tubing head. In certain instances, these seals can offer a special sealing capability for FRAC equipment. Secondary seal assemblies include several advanced elastomeric and metal to metal seal designs.
PE Seal Assembly
The PE Seal is a secondary seal of different design. It is a five pieces assembly consisting of an upper and lower junk ring, a seal element, a non-extrusion ring and a snap ring to retain the assembly in the secondary seal area of a casing spool or tubing head.
Technology parameters
Size | Casing Size | Working Press. | Product Specification Level | Material Class |
9” | 4.1/2” ~ 7.5/8” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
9.3/4” | 4.1/2” ~ 7.5/8” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
10.3/4” | 4.1/2” ~ 9.5/8” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
12.1/2” | 7” ~ 10.3/4” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
HPE Seal Assembly
HPE secondary seal is designed for high pressure applications. The bottom compression plate is threaded and is inserted in the bottom preparation of casing spools or tubing spools with threaded preparations.
Technology parameters
Size | Casing Size | Working Press. | Product Specification Level | Material Class |
9” | 4.1/2” ~ 7.5/8” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
9.3/4” | 4.1/2” ~ 7.5/8” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
10.3/4” | 4.1/2” ~ 9.5/8” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
12.1/2” | 7” ~ 10.3/4” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
2-CS Reducer Bushings
The 2-CS Reducer bushing is the simplest of the secondary seal assemblies. It consists of reducer bushing body, 2 CS Seals in the I.D. of the bushing and a snap ring for retaining the bushing in the secondary seal area of a casing spool or tubing head.
Technology parameters
Size | Casing Size | Working Press. | Product Specification Level | Material Class |
7” | 3.1/2” ~ 5.1/2” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
9” | 4.1/2” ~ 7.5/8” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
9.3/4” | 4.1/2” ~ 7” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
12.1/2” | 9.5/8” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
4S-FS Reducer Bushings
The 4S-CS Seal Assembly is a secondary seal assembly that features both O.D. and I.D. seals. It consists of reducer bushing body, 2 CS Seals in the I.D. of the bushing accompanied by 2 S-Seals on the O.D. A single snap ring also retains the bushing in the secondary seal area of a casing spool or tubing head.
Technology parameters
Size | Casing Size | Working Press. | Product Specification Level | Material Class |
7” | 3.1/2” ~ 5.1/2” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
9” | 4.1/2” ~ 7.5/8” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
9.3/4” | 4.1/2” ~ 7” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
12.1/2” | 9.5/8” | 3K ~10K | PSL 1 ~ PSL 3 | AA, EE, FF |
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