In Mud Gas separator, the mud, which has been returned from a borehole, is forced to flow upwardly through a main cylindrical housing by the action of an auger device. The auger flight is spaced from the auger shaft, so that a longitudinally extending, axial passageway is formed within the housing for removal of gases from the mud. The auger flight is comprised of a plurality of sections, each axially spaced from one another, with a perforated member being interposed therebetween. The combined action of the flight and the perforated member causes the mud to assume a flow path which releases an unexpected amount of gas therefrom. An annular trough at the top of the housing collects the degasified mud. A closure member at the upper end of the housing enables the axial passageway to be evacuated which enhances the removal of gases from the mud.

Mud mixers are mainly used in horizontal directional drilling industry. It is designed to provide complete suspension of the mud and cuttings. This provides a uniform feed to the mud cleaning equipment regardless of the mud weight. This results in sending less sand and silt back into the mud pumps and into the hole, reducing wear and increasing the life span of pump liners, drill string, bearings and other moving parts. The features of these mixers include tank multi jet motion, vacuum induced waist high hopper, stainless steel filter, and cast jetting tee.