04127168 is referenced by 95 patents and cites 7 patents.

An improved well packer for use in sour gas wells is disclosed. The improved packer includes a cylindrical mandrel encircled with a resilient metal seal ring, means for anchoring the packer at a predetermined vertical depth, means for radially expanding the seal rings so as to cause sealing engagement with the casing and mandrel, and ratchet means for maintaining the seal rings in expanded form. The packer is adapted to be run into the cased wellbore on tubing and is particularly useful in sour gas wells.

Title
Well packers using metal to metal seals
Application Number
5/776799
Publication Number
4127168
Application Date
March 11, 1977
Publication Date
November 28, 1978
Inventor
James B Greer
Houston
TX, US
Thomas W Childers
Mandeville
LA, US
Hollis A Baugh
Hempstead
TX, US
Harry R Hanson
Houston
TX, US
Agent
Gary D Lawson
Michael A Nametz
Assignee
Exxon Production Research Company
TX, US
IPC
E21B 33/128
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