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Frequently Asked Questions
What affects collar readability?
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Shallow wells are the easiest on which to count the collars all the way down to the fluid level.
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Wells with higher casing pressure are easier than low pressure wells, i.e. wells under 15 psig.
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The tighter the fit between the casing and the tubing collars, the harder it is to get deep collars.
Slim hole completions are some of the toughest, as it is very hard for the shot to make its way
down the annulus area.
How do I know if the gas gun is leaking?
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After pressuring up the gun, does the gauge on the top of the gun continue falling in pressure? If
so, you probably need to rebuild the gun.
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Sometimes, gas is not leaking from the gas gun, but from the connection to the wellhead. Be sure
to apply several wraps of Teflon tape to the gun threads before attaching it to the wellhead. If
pipe adapters are being used, tape these, also.
How do I know if the microphone is dead?
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If the paper tape signal remains flat after shooting the shot, the microphone may be dead.
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First, check the microphone cable for secure connection to both the fluid logger and to the gun.
Also, look inside the microphone connector, to see is the metal pin inside the connection has been
broken or damaged.
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Remove the microphone from the gun, by removing the microphone bolt inside the gun and
pulling the microphone from the bottom of the gun. Hold the microphone on the stainless steel
portion, being careful not to press on the round microphone discs, which cover the sensitive
microphone crystals. Examine the discs for damage. A blown-out or caved-in disc indicates that
the microphone needs to be replaced.
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If the microphone discs do not look damaged, but the microphone is full of debris and dirt, wipe
down the microphone to remove the dirt. Carefully wipe off the microphone discs. Heavy dirt and
debris on the discs can stop the microphone from operating properly.
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Examine the microphone o-rings for damage and replace them and lubricate with silicon or o-ring
grease, then re-insert the microphone and tighten the microphone bolt. Repeat the well test to see
if sensitivity has been improved. If not, the microphone needs to be replaced.
Why didn’t I get a shot from the gun?
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Check bottle for CO².
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Did you charge up the gun? Check the gauge for pressure.
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Is the microphone cable fully connected to both the Acoustic Fluid Logger and to the gun?
Summary of Contents for Acoustic Fluid Logger III
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