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50Casing secondary BT seal
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.
It is mainly used for the secondary sealing between the casing head and the bottom of the tubing head. Generally, the pressure of one BT seal is less than or equal to 5000PSI, and the two BT seals can be used for high pressure. The pressure through injection molding shall not be higher than the extrusion strength of the casing.
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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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-50°C~121°C |
≤15000PSI |
Oil, water, Gas, H2S, CO2 etc |
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| Nominal Wellhead Casing | ||||
| Inch | MM | Inch | MM | |
| 3.500 | 88.90 | 9.625 | 244.48 | |
| 4.000 | 101.60 | 9.875 | 250.83 | |
| 4.500 | 114.30 | 10.000 | 254.00 | |
| 4.750 | 120.65 | 11.750 | 298.45 | |
| 5.000 | 127.00 | 11.875 | 301.63 | |
| 5.500 | 139.70 | 13.375 | 339.73 | |
| 5.750 | 146.05 | 13.625 | 346.08 | |
| 6.000 | 152.40 | 14.000 | 355.60 | |
| 6.250 | 168.28 | 16.000 | 406.40 | |
| 7.000 | 177.80 | 18.625 | 473.08 | |
| 7.650 | 193.68 | 20.000 | 508.00 | |
| 7.750 | 196.85 | 24.000 | 609.60 | |
| 8.625 | 219.08 | 30.000 | 762.00 | |
| 9.000 | 228.60 | |||
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Categories
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Lockdown screw seal is used mainly in geothermal applications, HNBR packing with stainless steel caps provide superior performance over metal pressure seals.
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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.
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