"Think you've got a solid cement job? Think again. If you lost returns while cementing the intermediate casing, you might be flying blind on where that cement actually landed.That's where the Echometer Gas Gun earns its keep. A quick shot of nitrogen into the casing sends an acoustic wave racing downhole.When it smacks the top of the cement, it echoes back, telling us exactly where the cement stopped. No more relying on gut feelings or best guesses.If you don't know your top of cement, you're ga