Wells – Pistons – fluid driven into well – With downflow past piston
Patent
1991-10-28
1993-01-19
Dang, Hoang C.
Wells
Pistons, fluid driven into well
With downflow past piston
166 50, 166325, 166383, E21B 2310
Patent
active
051800098
ABSTRACT:
A wireline delivery tool for an underground well having a pipe, a surface seal for the pipe, and a wireline extending from the surface into the pipe. The wireline delivery tool includes a body having a diameter less than the interior diameter of the pipe and a cup extending from the body to create a seal with the interior of the pipe. A longitudinal bore within at least a portion of the body has a port through the body on each side of the cup, so that the ports are in communication with the interior of the pipe. A pressure valve within the bore is normally in the closed position. Pressure supplied into the pipe between the surface seal and the cup will move the delivery tool within the pipe.
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