Wellheads
Casing Hanger
It is a mechanism used to support a casing string in a casing head. Casing hangers are available with either threaded (mandrel) or slips. Slip-type hangers are available in automatic-sealing and nonautomatic-sealing varieties. Automatic hangers have seals which are energized by casing weight, while nonautomatic hangers have seals which require means other than casing weight to be energized. Nonautomatic hangers are typically used when insufficient casing load is available or when cementing back to the surface.
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TYPE
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AUTOMATIC
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NON-AUTOMATIC
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BOTTOM THREAD , in
|
TOP THREAD , in
|
|
SLIPS & SEAL
|
P
|
P
|
x
|
x
|
|
SLIPS & SEAL
|
P
|
P
|
x
|
x
|
|
SLIPS & SEAL
|
P
|
P
|
x
|
x
|
|
SLIPS & SEAL
|
P
|
P
|
x
|
x
|
|
MANDREL
|
x
|
x
|
13 3/8 BUTTRESS BOX
|
17.25-2TPI STUB ACME
|
|
MANDREL
|
x
|
x
|
10 3/4 VAM TOP BOX
|
11-4TPI STUB ACME
|
|
MANDREL
|
x
|
x
|
9 5/8 BUTTRESS BOX
|
10-6TPI STUB ACME
|