Pipes and tubular conduits – With flow regulators and/or baffles – Restrictors
Reexamination Certificate
2006-08-08
2006-08-08
Lee, Kevin (Department: 3753)
Pipes and tubular conduits
With flow regulators and/or baffles
Restrictors
C166S372000, C417S108000, C417S109000, C417S198000
Reexamination Certificate
active
07086417
ABSTRACT:
Invention is of an improvement to seat of gate valves used for gas-lift producing oil wells, consisting of a seat lower part of which is curved there being a straight vertical art and a sloping straight lower part, central spacing consisting of a first part in the shape of a tapered nozzle at which gas is gradually speeded up, a second part which is the main restriction to flow, and a third part in the shape of a conical diffuser at which gas is gradually slowed down.
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Lee Kevin
Nixon & Vanderhye PC
Petroleo Brasileiro S.A. - Petrobras
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