Abstract: Water, with gas entrained therein, collecting in the bottom of the casing of a gas producing well is continuously removed using an ejector in the inner of a pair of coaxial tubes mounted in the casing by continuously pumping drive water downwardly between the two tubes, radially inwardly through apertures in a nozzle body and upwardly through a nozzle at the top of the nozzle body into a suction chamber to draw water from an inlet duct at the bottom end of the inner tube through longitudinally extending passages in the nozzle body; the resulting mixture of drive water, well water and gas being discharged through a multi-stage diffuser and the inner tube to a separator, where the gas and water are separated. The separated gas can be used to operate a gas engine for driving the pump, which feeds drive water to the ejector, and the well water can be re-used as drive water.

Abstract: Fluid propulsive device for accelerating flow of fluid passing through the device, for pumping fluid, or solids carried in fluid, or for propelling the device through fluid. The device has a main body having a duct provided with primary and secondary jet means adapted to receive working fluid under pressure. The jet means extend peripherally around the duct generally within planes normal to duct central axis and direct conical sprays of working fluid downstream into the duct. Primary jet means sprays working fluid initially at a conical semi-angle of between 18.degree. and 30.degree. so as to converge inwards initially towards a theoretical apex of the cone of the spray adjacent the duct central axis. Secondary jet means disposed downstream of the primary jet means within plane containing theoretical apex sprays fluid initially at angle of between 6.degree. and 10.degree. to duct side wall.

Abstract: The invention provides a jet pump system for removing dust from aeriform substances. The dust-laden, aeriform substance is entrained by at least one water jet pump to cause precipitation of the dust and water as sludge out of the aeriform substance.

Abstract: A water jet nozzle comprises an inlet pipe extending into a converging conical section of an outlet pipe, with a narrow annular opening between the inlet pipe end and the outlet pipe inner wall. The outlet pipe also has a straight section in continuation of the smaller end of the converging conical section followed by a diverging conical section and a substantially straight outlet section. Pressurized air is introduced through the annular opening to surround the central water flow, thereby reducing friction against the outlet pipe wall, the consecutive outlet pipe sections further improving the shape and reach of the ejected water jet.

Abstract: Apparatus for removing solids such as iron oxide pellets and fines from the rotating water seal trough of an annular material cooler by periodically operating an air ejector pump, which is suspended in the trough and operated at predetermined intervals and for a predetermined time; the ejector pump has associated with it a sensing apparatus both being pivotally mounted and suspended within the trough; an abnormal build-up of pellets and fines in the trough or large foreign bodies within the trough is sensed by the sensing means which actuates emergency means to override the normal pump operating cycle and maintain the pump operating and simultaneously alerting personnel to the emergency condition.

Abstract: Fluid-driven air-pumping and mixing apparatus for pumping air into a high methane environment and mixing ambient airborne impurities with such fluid for diluting the same. The apparatus includes a divergent mixing chamber proximate the outlet of the apparatus and a fluid dispersing nozzle having a configuration and location relative to the mixing chamber for maximizing air flow through the apparatus as well as providing a subsidiary advantage of increasing mixing of the driving fluid with the airborne impurities.

Abstract: Two circular rows of through channels in the walls of the pump mixing chamber serve to admit the conveying fluid into said chamber. The axes of the channels in one row are inclined to the cross-sectional plane of the mixing chamber and to the plane passing through its longitudinal axis, thus forming a vortex stage. The axes of the channels in the other row are inclined only to the cross-sectional plane of the mixing chamber, thus forming an injecting stage. The distance between the stages is selected so as to arrange the points of intersection of the channel axes of the vortex stage and the point of intersection of the channel axes of the injecting stage in one and the same plane which is perpendicular to the longitudinal axis of the mixing chamber.This pump can be used in devices for sucking in, conveying and placing loose materials, for lifting slurry in rotary drilling of wells with the well face cleaned by the indirect flushing method and in the devices for the preparation of clayey suspension.

Abstract: an oil well completion comprising a well bore drilled from the surface through and below an oil producing formation to provide an extension below the producing formation, a jet pump in the extension below and in communication with the producing formation, means for conducting power fluid under pressure downwardly in the well bore from the surface to the jet pump, and means for conducting spent power fluid, and fluid from said producing formation discharged by said jet pump, upwardly in the well bore from the jet pump to the surface. The purpose of locating the jet pump in a downward extension of the well bore below the producing formation is to provide sufficient submergence of the jet pump to avoid cavitation, without curtailing the flow of fluid from the producing formation into the well bore.