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16. Turn power switch to OFF after operation.
17. Record Time and Casing Pressure.
18. Close the Casing Valve between Echometer Gas Gun and the well.
19. Open the Casing Pressure Bleed Valve and release the pressure.
20. Open the Casing Valve to the flow line.
21. Remove the Echometer Gas Gun from the casing valve.
Operation of the Model M with the Remote Fired Gas Gun
The main differences in operating procedure are that the Remote Fired Gas Gun initial pulse is generated by
depressing the Remote Fire Button on the control panel, and that this gun can only be used in the Compression
(Explosion) Mode.
1.
Securely attach the Echometer Remote Fire Gas Gun to the Casing Valve.
2.
Charge the gas chamber to at least 100-psi in excess of the estimated well pressure to prevent debris from
entering the volume chamber and the solenoid dart valve assembly.
3.
Close the gas gun's Casing Pressure Bleed Valve.
4.
Open the Casing Valve to the Remote Fire Gas Gun slowly.
5.
Close the casing valve to the flow line.
6.
Measure the casing pressure using the precision pressure gauge.
7.
Record Time and Casing Pressure
8.
Verify that the volume chamber pressure is at least 100-psi in excess of the Casing Pressure.
9.
Connect the coaxial cable from the microphone to the Input of the Model M.
10. Connect the remote fire cable from the gun to the REMOTE FIRE connector.
11. Turn Power Switch to ON.
12. Select the collar FILTER and set the gain controls to AUTO.
13. Turn chart drive ON.
14. Generate pressure pulse by depressing the Remote Fire button for approximately one second to insure full
opening of the solenoid valve.
15. Turn chart drive OFF after detecting the liquid level signal.
16. Inspect the record and repeat the shot if the signal quality is not satisfactory
17. Turn power switch to OFF after operation.
18. Record Time and Casing Pressure.
19. Close Casing Valve to the Remote Fire Gas Gun.
20. Open the Casing Pressure Bleed Valve and release the pressure.
21. Open the Casing Valve to the flow line.
22. Disconnect cables and remove the Echometer Gas Gun from the casing valve.
NOTES
1.
On deep, low pressure wells; first select the lower collar position.
2.
If the initial pulse is not detected which is indicated by the zero timing mark, use a larger initial pulse.
3.
If the liquid level is not detected (especially in deep wells with low casing pressure), the volume chamber
pressure should be increased in increments of 300-psi up to the limit of the available gas supply.
4.
Do not use a larger volume chamber pressure than needed. Operating the gas gun at 300-psi requires twice as
much gas as when operating at 150-psi. Only one half as many shots will be obtained from a gas cylinder.
5.
When using CO
in considerably more gas being used per shot.
6.
When using nitrogen gas, use a regulator so that the pressure will not exceed the working pressure rating of
1500-psi.
Echometer Company
5001 Ditto Lane
Wichita Falls, Texas 76302, U.S.A.
gas above 300-psi (at normal temperatures), liquid may form in the gas gun, which will result
2
Model – M Manual
Page 17
Phone: (940) 767-4334
Fax: (940) 723-7507
E-Mail:
info@echometer.com
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