Wells – Expansible anchor or casing – Liner hanger
Patent
1986-03-14
1988-07-19
Suchfield, George A.
Wells
Expansible anchor or casing
Liner hanger
166123, 166182, 277117, 277236, 285 39, 285140, E21B 33035
Patent
active
047578602
ABSTRACT:
There are disclosed several forms of subsea wellhead equipment of the type in which casing hangers connected to the upper ends of successively smaller diameter casing strings are adapted to be lowered into and landed within the bore of a casing head, which is connected to an outermost string at the subsea level, to suspend the strings within the outermost casing of the well bore, and wherein openings in each hanger which connect the annulus between each casing string and the next outer string with the space between the hanger and the bore of the head, to permit cement returns to circulate therethrough as the string is cemented within the well bore, are adapted to be closed off, when the casing has been cemented, by means of a seal assembly lowered into and locked down within the space.
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P. 5838-D of the 1984-1985 issue of the Composite Catalog of Oilfield Equipment Services.
Dang Hoang C.
Dril-Quip Inc.
Suchfield George A.
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