Wells – Packers or plugs – With expanding anchor
Patent
1992-12-14
1995-12-12
Britts, Ramon S.
Wells
Packers or plugs
With expanding anchor
166191, 166212, 166217, E21B 2302, E21B 2304, E21B 33124
Patent
active
054741270
ABSTRACT:
An annular safety system for an oil well. The annular safety system is in the form of a hanger mechanism. The hanger mechanism is particularly effective in an oil well equipped for gas lift operation where gas is injected into an annular space between the well casing and the production tubing in order to aerate produced oil migrating up the wellbore through the production tubing. The hanger mechanism includes a casing nipple which is run into the well with the casing and a stationary threaded tubing holder which is run into the well with tubing. The hanger mechanism includes a device which, upon running the stationary threaded tubing holder into the well through the casing nipple, secures the stationary threaded tubing holder in a particular position relative to the casing nipple and prevents upward and downward movement of the stationary threaded tubing holder relative to the casing nipple. The hanger mechanism also includes a device allowing the hanger mechanism to selectively, independently seal each of the annular space between the well casing and the production tubing to prevent flow of injected gas and produced oil from the wellbore. Further, the hanger mechanism includes a release mechanism which may be selectively activated to allow the stationary threaded tubing holder and other downhole equipment to be upwardly retrieved from the well.
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Otis Products and Services Catalog Index, p. 3, .COPYRGT.1989 Otis Engineering Corporation.
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Britts Ramon S.
Halliburton Company
Tsay Frank S.
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