Downhole tool with expandable annular plug seat assembly having circumferentially overlapping seat segment joints
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United States of America Patent
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Nov 29, 2016
Grant Date -
Jun 25, 2015
app pub date -
Dec 19, 2013
filing date -
Dec 19, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A tubular downhole tool, representatively a sliding sleeve valve, coaxially supports within its interior an annular plug ball seat formed from a series of rigid, arcuate segments that circumferentially overlap one another in various representatively disclosed manners. The seat is expandable from a diametrically compressed orientation, toward which it is resiliently biased, to a diametrically expanded orientation by a plug ball pumped through the seat. Due to the circumferential segment-to-segment overlap, each segment is blocked by its two circumferentially adjacent segments from being axially separated from the overall seat assembly by operational pressure forces.
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