Echometer Company
Model – M Manual
Phone: (940) 767-4334
5001 Ditto Lane
Page
17
Fax: (940) 723-7507
Wichita Falls, Texas 76302, U.S.A.
E-Mail: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
2
gas above 300-psi (at normal temperatures), liquid may form in the gas gun, which will result
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.