Downhole separation apparatus and method
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United States of America Patent
Stats
-
Sep 26, 2017
Grant Date -
Aug 13, 2015
app pub date -
Feb 6, 2015
filing date -
Feb 7, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A downhole separation apparatus for releasing a pipe string from a bottom hole assembly is disclosed. The apparatus has a tubular collet body, a tubular bottom sub, and a piston collet positioned within the collet body. The collet piston has a plurality of collet fingers threadedly engaging an internal profile of the bottom sub. Separation is accomplished by pumping a circulation ball through the pipe string until it lands on a ball seat inside the collet piston. Increasing fluid pressure then shifts the piston collet axially downward within the collet body thereby causing the collet fingers to collapse to disengage the bottom hole assembly from the pipe string.
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