          |
|
|
Question: Why can't I pressure the remote fire gas gun volume chamber?
The remote fire gas gun utilizes a solenoid and small dart valve to actuate a larger gas valve. If the small dart valve becomes dirty from well debris or sand, the dart valve will leak and the gun will fail to operate properly. The small orifice and dart valve must be kept clean or considerable maintenance will be required. The required maintenance consists of disassembling the remote fire gas gun dart valve and solenoid parts and cleaning them. Then the parts must be reassembled.
The maintenance of the remote fire gas gun can be greatly reduced by pressurizing the remote fire gas gun volume chamber before the gas gun is exposed to well pressure. This prevents well gas and debris from entering the gas gun volume chamber. If the remote fire gas gun is not charged, water vapor, debris and sand from the well will be discharged into the small parts of the gas gun and will result in leakage and improper operation. This debris and water vapor can be eliminated from the small moving parts by simply charging the remote fire gas gun volume chamber to a pressure of approximately 200 PSI in excess of well pressure before the gas gun is installed on the well and the valve to the well is opened.
Always pressurize the gas gun volume chamber to a pressure approximately 200 PSI in excess of well pressure before opening the casing annulus valve to reduce maintenance requirements of the remote fire gas gun.