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A power supply and control arrangement for a submersible pump and solenoid operated safety valve system. A surface control unit is connected to a downhole control unit by a three conductor cable. A single phase 400 Hz signal from the surface unit is rectified downhole and operates the solenoid to op

A power supply and control arrangement for a submersible pump and solenoid operated safety valve system. A surface control unit is connected to a downhole control unit by a three conductor cable. A single phase 400 Hz signal from the surface unit is rectified downhole and operates the solenoid to open the safety valve but is too high a frequency to affect the pump motor. A downhole detector senses full open condition of the safety valve and sends a signal to the surface where it is received by a monitor. The monitor interrupts the 400 Hz signal and applies a three phase 60 Hz signal to all three conductors of the cable to operate the pump motor and be rectified downhole to hold the solenoid and safety valve open. Loss of the valve open signal by the monitor interrupts the 60 Hz signal and disables the system until it is reset.

대표청구항 ▼

A submersible pump and solenoid operated safety valve system for use in a borehole, comprising: a submersible pump driven by an electric motor positioned down in a borehole and connected to conduit means to produce a flow of well fluids within the borehole toward the surface; a solenoid operated saf

A submersible pump and solenoid operated safety valve system for use in a borehole, comprising: a submersible pump driven by an electric motor positioned down in a borehole and connected to conduit means to produce a flow of well fluids within the borehole toward the surface; a solenoid operated safety valve connected to interrupt the flow of well fluids toward the surface in response to the interruption of current to the solenoid holding said safety valve in an open condition; a surface control unit; a downhole control unit positioned down in the borehole and connected to said surface control unit and to the motor of said pump by means of an electrical cable; means for supplying AC electrical power from said surface unit down the conductors of said cable; and means mounted within said downhole control unit for providing electric current for operating said solenoid to open said safety valve. A method for supplying power to a submersible pump and a solenoid operated safety valve in a petroleum production well completion within a borehole, comprising: selectively supplying electric power with a surface control unit at a pair of different operating frequencies, the lower frequency power being capable of driving a motor for said pump and the higher frequency power being incapable of driving said motor for said pump; actuating a solenoid in response to said higher frequency power with a downhole control unit to open said safety valve; producing a signal in response to the open condition of said safety valve with a downhole control unit; providing a cable interconnecting said surface control unit and said downhole control unit for conducting power at both frequencies downhole and conducting a signal uphole indicative of the open or closed condition of said safety valve; and first connecting the higher frequency power to said cable with the surface control unit and then, in response to a valve open condition signal from the downhole control unit, connecting the lower frequency power to said cable with the surface control unit to drive the motor for said pump.