Method and apparatus for selective disengagement of a fluid transmission conduit operable under oppositely directed pressure differentials
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United States of America Patent
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Jul 10, 1984
Grant Date -
N/A
app pub date -
May 21, 1981
filing date -
May 21, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for the insertion and disengagement of a tubing string used in a subterranean well subject to oppositely directed pressure differentials is disclosed. A packer apparatus which anchors a portion of the tubing string against rotation is used in conjunction with a disengagable on/off connector and a valve apparatus capable of withstanding oppositely directed pressure differentials. The valve apparatus can be selectively opened and closed by rotary manipulation of the tubing string through the disengagable on/off connector. Portions of the tubing string above the valve apparatus can then be inserted into the well or removed from the well or tested for pressure integrity.
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