Abstract: An elongated casing is provided and is closed at one end. A fluid pressure actuated elongated internal vibrator of the type including an internal fluid pressure driven eccentric weight orbital about an axis extending centrally longitudinally through the vibrator is provided and is loosely telescoped into the other end of the casing. The other casing end is tightly closed about the adjacent end of the internal vibrator and the interior of the casing is filled with a hard fluent aggregate disposed about the vibrator and a pair of annular members are tightly mounted upon and extend about longitudinally spaced portions of the vibrator and include outer peripheral portions spaced inward of the inner surfaces of the casing. The vibrator and its surrounding aggregate filled casing may be suspended in a tank containing well effluent of the type comprising water and oil and having gas suspended therein.