Wells – With electrical means – Electrical motor
Patent
1989-06-14
1991-01-01
Neuder, William P.
Wells
With electrical means
Electrical motor
166 665, 166332, 25112909, 25112915, E21B 3400
Patent
active
049811738
ABSTRACT:
A solenoid operated valve system for petroleum production wells including a solenoid operated valve securable in a well bore connected to the lower end of a tubing string extending to the surface. The valve of the system includes an outer housing, an inner wall defining a flow passageawy therethrough and an annular cavity therebetween for receiving the solenoid coil and associated electrical components. The spaces in the annular cavity surrounding the solenoid coil and components is filled with an electrically insulative filler material to protect the electrical elements from borehole fluids. The solenoid operated valve has an operator tube formed of tubular sections of different magnetic characteristics so that the valve is opened against a biasing spring by a high current flow and held open by a current flow of a lower value. The valve solenoid is operable by either AC or DC current.
REFERENCES:
patent: 3196948 (1965-07-01), Dye
patent: 4191248 (1980-03-01), Huebsch et al.
patent: 4579177 (1986-04-01), Going, III
patent: 4667736 (1987-05-01), Rumbaugh et al.
patent: 4725783 (1988-02-01), Miyairi et al.
patent: 4796708 (1989-01-01), Lembcke
Deaton Thomas M.
Perkins Donald H.
Neuder William P.
Otis Engineering Corporation
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