Abstract: The present invention relates to a method and apparatus for enhancing the quality of a foam, such as may be employed in industrial cleaning operations, petroleum well servicing operations, and the like. Foam from a foam generator is introduced into a foam separator comprising a pressure vessel, preferably having an apertured horizontal separator plate therein, a discharge line at the top thereof, and a drain line at the bottom thereof. As foam enters the separator, the foam will pass upward through the apertured separator plate, any liquid remaining below. The liquid then enters the drain line and is reinjected into the liquid line feeding the foam generator, preferably by use of an eductor. The foam is removed from the separator through the discharge line, and put to its intended use.

Abstract: A sludge cleaning lance advancing apparatus includes a frame having a lead screw rotatably disposed in the frame. An electric stepping motor is connected to the frame and a belt and pulley drive is connected between the stepping motor and the lead screw for rotating the lead screw upon rotation of a shaft of the stepping motor. A lance carrier has an internal screw thread engaging the lead screw, and the lance carrier and lead screw are so arranged and constructed that the lance carrier is moved longitudinally relative to the lead screw as the lead screw is rotated relative to the lance carrier. A lance is carried by the lance carrier. A handwheel is attached to the lead screw for manually rotating the lead screw to initially position the lance. An alignment rod is provided to aid in this initial positioning.