Method and apparatus for removing fluid from production tubing i

Details Method and apparatus for removing fluid from production tubing i Method and apparatus for removing fluid from production tubing i

1996-11-18

1998-07-21

Dang, Hoang C.

Wells

Processes

Destroying or dissolving well part

166317, 166318, 166386, 137 6811, E21B 3406

Patent

active

057823057

ABSTRACT:
Methods and apparatus are provided for draining or removing well fluid from a production tubing string into a well borehole while pulling the tubing string from the well. A special length of tubing is provided near the lower end of the tubing string with a drain port communicating the interior and exterior of the tubing. The drain port is initially plugged and sealed with a knock out plug. When it is desired to remove the tubing string from the well and drain its fluid into the borehole, a drop sleeve is dropped from the surface to shear and open the knock out plug. A sleeve stop catches the drop sleeve for re-use.

REFERENCES:
patent: 1643908 (1927-09-01), Smyser
patent: 1659335 (1928-02-01), Smyser
patent: 1854477 (1932-04-01), McKissick
patent: 2070907 (1937-02-01), Laughinghouse

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