Or relating to well abandonment and slot recovery
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 2, 2024
Grant Date -
Jul 14, 2022
app pub date -
May 23, 2020
filing date -
May 24, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A downhole actuator (16) includes a piston (15) within a chamber (17) on which fluid can act on either side to hydraulically activate the actuator. A hydrostatic equilibrium device (18) and a valve (14) are mounted around the hydraulic actuator. With a radial port (28) of the hydrostatic equilibrium device closed and the valve closed to seal the string, pumping fluid through the string operates the actuator. Pressure overbalance prevents movement of the piston (15). The radial port (28) is opened to drain fluid from the string until equilibrium is reached with the annular volume and the piston (15) can be moved.
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