Independent wellhead drilling adapter

Wells – Processes – Assembling well part

Reexamination Certificate

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Details

C166S085100

Reexamination Certificate

active

07909105

ABSTRACT:
An assembly for connecting a drilling adapter to a wellhead comprising external threads on an end portion thereof.

REFERENCES:
patent: 3759453 (1973-09-01), Johnson
patent: 4690220 (1987-09-01), Braddick
patent: 6092596 (2000-07-01), Van Bilderbeek
patent: 2005/0092496 (2005-05-01), Duhn et al.
“Specification for Independent Wellhead Equipment”, APSI Specification 11IW, First Edition, Jun. 2000, pp. 1-4, 15-17.
“Quick Lock Drilling Flange”, www.wellheadinc., pp. 1-3, Jun. 29, 2007.

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