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Question: Why does the Remote Fire Gas Gun not generate a pulse?
Answer: The remote fire gas gun utilized a 12-volt DC solenoid. Twelve volts is supplied from the electronic instruments to actuate the solenoid. The voltage output can be checked with a voltmeter across the two pins on the cable connector which attaches to the solenoid connector. The continuity of the solenoid coil can be checked using a resistance meter. The coil operates from 12-volts and draws approximately 1-amp and the resistance is approximately 12 ohms. If the 12-volt supply voltage and the coil checks o.k., the problem must be mechanical. The solenoid coil raises a plunger that contains a dart valve. The plunger housing can be removed and cleaned. Also inspect that the plunger is free moving.
If debris has collected in the gas gun, the orifice may be restricted or dirty and the gun will fail to operate properly. This requires that the gun be disassembled and cleaned and then reassembled.
Always pressurize the gas gun volume chamber before the remote fire gas gun is attached to the well and exposed to well pressure. The well pressure will blow debris into the small parts of the remote fire gas gun if the remote fire gas gun volume chamber is not charged before being exposed to well pressure. This charging operation will greatly reduce maintenance.