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Automatic and Unitised Casing Hangers |
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Automatic Casing Hanger (PCHA) is basically
designed for heavy load service and is used for
American Completion Tools Casing Head Housing 'PCHH' and Casing
Head Spool 'PCHS' described earlier. When the Casing
load is applied to the hanger, the top ring connected by
the Pack-off and shoulder screw compresses the packing
to seal the annulus pressure of the casing. This casing
hanger is normally used for pressure ratings upto 3000
PSI. For ratings over 3000 PSI, type 'PSPO' Pack-off is
used to prevent collapse of the pipe.
Unitised Casing Hanger (PCHU) can be used both for
American Completion Tools Casing Head Housing (PCHH) and Casing
Head Spool (PCHS) as described earlier. This Hanger is
designed for medium or heavy load service. This hanger
is normally latched around the pipe and lowered in casing
head body. After the casing is landed, shoulder screws
should be evenly tightened to affect a positive annular
seal. The hanger may be used upto 3000 PSI WP. For
ratings over 3000 PSI, 'PSPO' Pack-off is used to prevent
collapse of the pipe.
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