Wells – Processes – Placing or shifting well part
Patent
1995-06-19
1997-02-25
Tsay, Frank
Wells
Processes
Placing or shifting well part
166348, 166368, 285175, E21B 3304
Patent
active
056051948
ABSTRACT:
An independent screwed wellhead apparatus and method provide for connecting a high pressure casing nipple (34) to internal threads (36) disposed along the bore (38) of the wellhead body (12) to temporarily increase the working pressure capability of the wellhead body (12). The internal threads (36) are supported by a thick wall (44) of the wellhead body (12) disposed in a lower end (13) of the wellhead body (12). The lower end (13) of the wellhead body (12) has a higher working pressure capability than the upper end (19) of the wellhead body (12). The high pressure casing nipple (34) temporarily isolates the upper end (19) from the higher pressure.
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Huber Drawing No. 7805 (dated Sep. 28, 1987).
J. M. Huber Corporation
Tsay Frank
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