Wells – Processes – Repairing object in well
Patent
1994-01-18
1995-05-09
Dang, Hoang C.
Wells
Processes
Repairing object in well
166380, 166386, E21B 4310, E21B 4312
Patent
active
054131766
ABSTRACT:
A sintered metal screen is releasably suspended from a packer mandrel by a locking mandrel and a landing nipple. The sintered metal screen and locking mandrel are retrievable with the assistance of a running tool which is insertable into the bore of the locking mandrel. According to this arrangement, the sintered metal sand screen may be removed and replaced without retrieving the packer or the production tubing. In one embodiment, the sintered metal screen is enclosed within the bore of a sliding side valve. The sliding side valve may be opened and closed as desired for selectively admitting formation fluid from various producing zones, or for isolation of a damaged screen. In another embodiment, an auxiliary sintered metal screen is inserted into the bore of a primary screen, for example, a conventional wire-wrap sand screen. The sintered metal sand screen is thus interposed in the flow path for screening out sand fines which would otherwise be conducted because of damage to the primary screen caused by corrosion or sand erosion.
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Dang Hoang C.
Druce Tracy W.
Griggs Dennis T.
Halliburton Company
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