Wells – Pistons – fluid driven into well – With stop
Patent
1997-05-05
1998-12-01
Tsay, Frank
Wells
Pistons, fluid driven into well
With stop
1661774, E21B 3316
Patent
active
058425179
ABSTRACT:
The apparatus of the present invention is a mechanism for use in cementing a casing string in a well bore comprising a float collar connectable to the casing string, a cement plug engagable to the float collar, and a wiper plug engagable to the cement plug, each element utilizing inclined plane J-slots for engagability. When engaged, the J-slots disallow not only rotational movement between the elements, but also vertical movement between the elements.
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Davis-Lynch, Inc.
Ehrlich Henry L.
Tsay Frank
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