Wells – Pistons – fluid driven into well – With downflow past piston
Patent
1984-06-05
1986-11-25
Novosad, Stephen J.
Wells
Pistons, fluid driven into well
With downflow past piston
166153, 166285, E21B 3316
Patent
active
046243127
ABSTRACT:
The present invention comprises an improved remote cement plug launching system including guide tube means associated with the cementing plugs, which guide tube means are adapted to guide plug release darts to seats in said plugs.
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Bagnell David J.
Halliburton Company
Novosad Stephen J.
Walkowski Joseph A.
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