Wells – Wiper
Reexamination Certificate
2008-03-27
2010-12-07
Bagnell, David J (Department: 3676)
Wells
Wiper
C015S104062
Reexamination Certificate
active
07845401
ABSTRACT:
A wiper plug has a telescoping feature to allow it to be shorter while in a lubricator so as to reduce lubricator length as compared to an extended length for proper propulsion past off center openings such as side pocket mandrels in the string. The wiper has a telescoping feature that allows it to extend when dropping or being pumped from a lubricator. Once extended, it can lock in the extended position so that it doesn't collapse on the way down the string. Centralizers can optionally be used between an upper and a lower wiping section.
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Farmer Jack David
Wildman Samuel L.
Bagnell David J
Baker Hughes Incorporated
Rosenblatt Steve
Wallace Kipp C
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