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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 therethroug

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.

대표청구항 ▼

An electrically operated solenoid actuated safety valve system for use in a borehole, comprising: an elongate tubular safety valve housing assembly having one end adapted for attachment to the lower end of a tubing string within the borehole, and the other end adapted to control the entry of borehol

An electrically operated solenoid actuated safety valve system for use in a borehole, comprising: an elongate tubular safety valve housing assembly having one end adapted for attachment to the lower end of a tubing string within the borehole, and the other end adapted to control the entry of borehole fluids into the assembly, said housing assembly including an outer housing, an inner wall defining a tubular passageway for allowing fluid flow through the valve assembly, and an annular space therebetween; a tubular magnetic armature member having a lower end adapted for engaging a valve closure member to effect opening of the valve, said member being mounted for axial movement within the tubular passageway through said housing assembly from a spring biased upper retracted position disengaged from said closure member and closing said valve to a lower extended position engaged with said closure member and opening said valve; a tubular electrical solenoid coil positioned in the annular space between the outer housing and the inner wall of said housing assembly and, at an axial location below the upper retracted position of said magnetic armature, the opposite ends of the wire coil comprising said solenoid extending through the annular space toward the end of the housing assembly adapted to be connected to the tubing; means for connecting said wire ends to an electrical cable extending from the surface of the borehole to enable current to flow through the solenoid coil and cause movement of the tubular armature member of said valve toward its lower extended position and effect opening of the valve; and an electrically insulative filler material filling the annular space in substantially all regions thereof not occupied by said solenoid coil and wires to prevent the entry of borehole fluids into said annular space.