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Wellhead secondary pack off seal is used to seal the hanger to the wellhead.
Brand:
JST SealsItem NO.:
DPKPayment:
T/TProduct Origin:
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GuangzhouOrder(MOQ):
50Wellhead secondary pack off seal
In the drilling operation and oil and gas testing process, a casing head pack off seal, also called slip hanger, as a basic part of a wellhead assembly, is installed at the upper end of a casing string for suspending the casing string of each casing layer and sealing annular spaces between the casings of two adjacent casing layers. A slip seal is a main seal of the slip-type casing head, and performances there of directly affect the application range and normal use of the casing head.
Wellhead secondary pack off seals used to seal the hanger to the wellhead. The seal assembly may include a seal element and a lockdown member. The seal assembly is attachable to either one of the wellhead members by coupling the lockdown member to a locking surface on the wellhead member. The lockdown member and locking surface may include corresponding profiles for mating engagement thereby preventing relative movement between the wellhead member and seal assembly.
Pack off seal vary considerably in design. They generally comprise a square or rectangular section profile that is compressed axially in a housing to generate a radial sealing force against a casing or tubing. The packer may be homogeneous rubber, or incorporate reinforcement in the form of fabric, steel mesh.
Wellhead secondary pack off seals designed by JST can withstand the high pressure of 15000 psi and the temperature range from - 29 ℃ to 121 ℃.
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Advantages: Anti-high pressure and Anti-extrusion. |
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Working Conditions |
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Temperature range |
Pressure |
Medium |
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-46°C~121°C |
≤15000PSI |
Oil, water, Gas, H2S, CO2 etc |
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Categories
T-seals are three piece seals with an elastomeric lip and hard plastic anti-extrusion rings, it is proved to be of long time service. The standard design will fit into an o-ring gland and can be machined or net moulded.
Lockdown screw seal is used mainly in geothermal applications, HNBR packing with stainless steel caps provide superior performance over metal pressure seals.
JST's metal end cap seal is elastomer bonded onto 2 steel caps. This provides high level of extrusion resistance.
The ID S seal is used for wellheads, downhole tools and surface pressure control equipment as a critial part.
Pack off seal or Secondary Seal Assemblies is installed in the lower seal area of the Casing Spool or Tubing Head.
P seal is constructed from an elastomer with back up rings for anti-extrusion. Energized by the injection of sealant, it is a static seal that is used to seal rough casing and tubing. Backup rings are available in Mesh Stainless Steel or Solid Carbon Steel.
The FS-seal is a relatively large cross section spring energized elastomer casing and tubing hanger seal for wellheads that always has the springs on the internal surface.
BT Seal is a static seal that is used to seal rough casing and tubing. It is constructed from an elastomer with anti-extrusion spring bonded within it. Springs are available in stainless steel, elastomer could be HNBR or NBR.
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