Retaining apparatus for use in a wellhead assembly and method for using the same
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United States of America Patent
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Mar 27, 2012
Grant Date -
N/A
app pub date -
Feb 17, 2005
filing date -
May 18, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A retaining apparatus, in particular an internal tree cap, for use in a wellhead having a central bore and first and second retaining means, such as a shoulder and a groove, within the bore of the wellhead. The retaining apparatus has a housing for location within the bore of the wellhead. A first engagement assembly is provided for engaging with the first retaining means in the bore of the wellhead to thereby retain the housing within the bore of the wellhead. A second engagement assembly for engaging with the second retaining means in the bore of the wellhead is also provided. The apparatus further comprises a preload assembly operable when the housing is located within the bore of the wellhead to apply a preload to the housing between the first and second retaining means. A method for retaining an assembly within a wellhead bore, in which a preload is applied between the first and second retaining means, is also disclosed.
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