Casing Pressure Gauge or Optional Transducer
The casing pressure and casing pressure buildup during the acoustic test must be measured with an accurate and sensitive
pressure gauge or sensor. The Remote Fire Gas Gun supplied with the Echometer Model M is equipped with a quick
connect gauge that covers the range 0-200 psig. The user should consider the option of obtaining several gauges
covering different pressure ranges.
Charging the Gas Volume Chamber
To charge the volume chamber, first connect the filler adapter to a 7.5 oz. CO
2
bottle. Then, press the adapter against
the filler fitting on the gun. When these two fittings are pressed together, a valve core in the bottle is depressed and gas
will flow from the bottle into the volume chamber. Charge the chamber to at least 100 PSI above casing pressure before
attaching the gas gun to the casing annulus valve to prevent debris from entering the gas gun internal valve parts. The
volume chamber pressure can be read on the gun-mounted gauge. A 5-LB, CO
2
bottle and hose with connector can be
used to change the gun, if desired.
High Pressure Gas Guns
The 5000-psi gas gun is normally used in the implosion mode. It has an excellent noise-canceling microphone and
generates a very good pulse when the
1
/
2
-inch ball valve is opened rapidly and the well pressure exceeds 200-psi. When
the 5000-psi gas gun becomes dirty due to debris imploding from the wellbore, the volume chamber and the microphone
assembly can be easily flushed with a solvent. The 5000-psi gas gun requires very little maintenance. It is excellent for
gas lift, flowing and high-pressure shut-in wells. It can be used in the explosion mode by charging the gas gun volume
chamber to a pressure in excess of the well pressure.
The 15000-psi High Pressure Gas Gun operates in the implosion mode only. Excellent results have been obtained at
pressures above 1500-psi through needle valves with 1/8-inch orifices, which are standard in most high-pressure wells.
For more details please refer to the Gun-Microphone Assemblies brochure in the appendix.
Accessories
Battery Charger (110 V- AC) or (220 V - AC if requested)
Automobile Battery Cable
Automobile Cigarette Lighter Cable
Casing Pressure Gauges
Precision Test Gauge
Precision Digital Gauge
Gas Cylinders
2-1/2 LB CO
2
5 LB CO
2
Nitrogen Cylinder