Wells – Processes – Placing or shifting well part
Reexamination Certificate
2007-04-03
2007-04-03
Bates, Zakiya W. (Department: 3676)
Wells
Processes
Placing or shifting well part
C166S120000, C166S134000, C166S382000
Reexamination Certificate
active
10690737
ABSTRACT:
A packer includes one dual, or double acting, slip and a single acting slip positioned on a mandrel on opposite sides of a packing element and a setting cylinder. The single acting slip is designed to resist forces acting on the mandrel in one direction. Setting forces generated by the setting cylinder are coupled to the mandrel through a releasing sleeve. When the releasing sleeve is decoupled from the mandrel, the slip setting forces on both slips and the packing element are released and the packer can be retrieved from a well. In a preferred form, the releasing sleeve may be decoupled from the mandrel by multiple means.
REFERENCES:
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patent: 5433269 (1995-07-01), Hendrickson
patent: 6112811 (2000-09-01), Kilgore
patent: 6202747 (2001-03-01), Lacy et al.
patent: 2004/0035589 (2004-02-01), Kilgore et al.
Kilgore Marion D.
Patterson Daniel L.
Bates Zakiya W.
Halliburton Energy Service,s Inc.
Metrailer Al C.
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