Hydraulic Disconnect Apparatus and Method of Use
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United States of America Patent
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Issued Date -
Mar 6, 2014
app pub date -
Aug 31, 2013
filing date -
Aug 31, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A hydraulic disconnect apparatus is disclosed for disconnecting a pipe string or coiled tubing string from a bottom hole assembly for drilling, work over, or plug and abandonment of oil and gas wells. Disconnection is accomplished by pumping a circulation ball from surface through the pipe or coiled tubing string until it lands on a seat inside the apparatus. Fluid pressure is then applied to shift a piston assembly within the apparatus, thereby allowing a series of balls to retract. The upper and lower portions of the apparatus can then be separated by applying a tensile force to the upper portion.
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