Horizontal inflation tool selective mandrel locking device

Details Horizontal inflation tool selective mandrel locking device Horizontal inflation tool selective mandrel locking device

1995-11-06

1997-12-02

Dang, Hoang C.

Wells

Packers or plugs

With expanding anchor

166136, 166185, 166191, E21B 33124, E21B 33128

Patent

active

056925646

ABSTRACT:
A straddle tool is disclosed which ensures sequential setting of the packing elements through the use of lost motion mechanisms. Once the lower pack-off has been set, the upper one is set and an internal valve is opened to allow flow through the tool to actuate a downhole tool, such as an inflatable packer. An anchor prevents actuation of the pack-off tool unless it is extended into a profile for support of the tool. Inadvertent settings of the pack-off tool are prevented, such as in oversized casing where the anchors are already fully extended, by virtue of a distance-sensing mechanism on the tool. When a large distance is sensed by one or more sensors, the mandrel is locked to the setting collars, preventing relative movement which could set the pack-off elements.

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