E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/04 (2006.01)
Patent
CA 2643800
A wellhead connection for connecting and sealing to a casing, including an upper head housing accommodating the upper end of the casing in its central bore, a stop shoulder in the cental bore to allow the upper head housing to rest on the upper end of the casing, and a seal profile section formed at the lower end of the central bore below the stop shoulder. An annular slip housing is included below the upper head housing to provide slip connectors to the casing. An annular bottom ring is connected between the upper head housing and the slip housing. A metal seal ring is located around the casing in the seal profile section of the upper head housing and is configured to be compressed radially inwardly by the seal profile section of the upper head housing to seal to both the casing and the upper head housing. The wellhead connection is configured such that, first connecting the slip housing and the bottom ring with a bottom connector energizes the slip connectors into gripping engagement with the casing and locks the slip housing and bottom ring around the casing, while thereafter connecting the upper head housing and the bottom ring with a top connector energizes the metal seal ring so as to radially compress the metal seal ring against the casing to form a metal seal.
Khazanovich Abram
Khazanovich Irina
Mckay-Carey & Company
Stream-Flo Industries Ltd.
LandOfFree
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