Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1981-05-01
1983-05-24
Novosad, Stephen J.
Wells
Valves, closures or changeable restrictors
Fluid operated
137896, E21B 33126, E21B 4100
Patent
active
043846157
ABSTRACT:
A method of mixing fluids in a well bore employing a tubing string with a mixing valve disposed thereon. The well bore is sealed below the mixing valve, a first fluid then being pumped down the tubing string and a second fluid being pumped down the well bore annulus. By varying pressures and through the optional use of a circulating valve in conjunction with the mixing valve, the fluids may be mixed in the well bore or in the tubing string.
REFERENCES:
patent: 2716454 (1955-08-01), Abendroth
patent: 3244234 (1966-04-01), Flickinger
patent: 3276523 (1966-10-01), Oliver
patent: 3727691 (1973-04-01), Muecke et al.
patent: 4064941 (1977-12-01), Smith
Halliburton Company
Neuder William P.
Novosad Stephen J.
Walkowski Joseph A.
Weaver Thomas R.
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