Wells – Packers or plugs
Patent
1995-12-01
1997-06-24
Dang, Hoang C.
Wells
Packers or plugs
277188A, E21B 33128
Patent
active
056410190
ABSTRACT:
A swab-resistant packer is disclosed which prevents the packing element from expanding outwardly to cause swabbing during tripping of the apparatus in a subterranean well. Preferably, a metallic or other cable or cord is placed immediate and circumferentially around the exterior of the first and second ends of the packing element to prevent the packing element from moving outwardly away from the first, pre-set retracted position to thereby abate any tendency to swab.
REFERENCES:
patent: 1547240 (1925-07-01), Steele
patent: 2430623 (1947-11-01), Taylor, Jr. et al.
patent: 2738017 (1956-03-01), Lynes
patent: 4219204 (1980-08-01), Pippert
patent: 4326588 (1982-04-01), McStravick
patent: 4809989 (1989-03-01), Kernal
Matte James T.
Stout Gregg W.
BJ Services Company U.S.A.
Dang Hoang C.
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