Abstract: A submersible fluid pump suitable for use in a landfill well includes an outer case extending along a vertical axis and at least partially defining an interior of the fluid pump, a fluid inlet and outlet, a discharge tube within the outer case and disposed between the fluid inlet and the fluid outlet, a float positioned around the discharge tube and within the outer case such that the float is within the discharge tube and the outer case, the float being movable along the discharge tube in an axial direction, a pneumatic valve configured to introduce pressurized air into the interior of the fluid pump, an actuator configured to open and close the pneumatic valve, and a plurality of magnets comprising a first magnet fixed with respect to the actuator and a second magnet fixed with respect to the float, the second magnet configured to magnetically repel the first magnet as the float moves to tip the actuator to either open or close the pneumatic valve.

Abstract: Gas is injected into the interior of the production string. The gas eventually reaches a gas lift mandrel that provides access from the interior of the gas lift mandrel to a chamber on the exterior of the gas lift mandrel. The chamber includes a cap that provides gas access between the interior of the chamber and the annulus. However, the cap is fitted with a gas lift valve and a check valve that regulates the gas flow into the fluid.

Abstract: The invention provides a liquid sampler for the automated sampling of liquids at dedicated pre-determined intervals. The liquid sampler includes a liquid inlet connectable to a liquid circuit containing a liquid to be sampled, a sampling reservoir for collecting a liquid sample, and a sampling pump connected to the liquid inlet, operable to extract a discrete amount of liquid from the liquid inlet and to discharge the discrete amount of liquid into the sampling reservoir.

Abstract: A submersible landfill pump system may include sensors to detect conditions inside the pump and/or well. In some embodiments, the sensors can be placed along an electrical wire within the well and provide sensor data to a user.

Abstract: The present invention provides a method for producing hydrocarbon gas from a wellbore and a control valve assembly for said wellbore. The wellbore comprises a wellhead, a production zone, a production tubing, and a velocity string installed inside the production tubing. The method comprises allowing gas to flow from the production zone through the velocity string, said gas forming a primary gas stream, and controlling the flow of gas from the annulus between the outer wall of the velocity string and the inner wall of the production tubing to the primary gas stream by means of the control valve wherein a controlled mass flow of said gas is combined with the primary gas stream.

Abstract: Disclosed is a pneumatically powered high-pressure and lightweight fluid pump. The pump is useful for pumping fuel for liquid rocket engines and for pumping water, such as for fire suppression. During operation of the pump, liquid is drained from a tank into a pump chamber and the chamber is then pressurized to deliver fluid. The chamber is then refilled from the main tank. An auxiliary chamber supplies fuel while the main chamber is being filled, thereby a steady stream is delivered from the pump. The auxiliary chamber is refilled from the tank while the main chamber is delivering fluid. The design results in substantial weight savings over a system in which the main tank is pressurized or a system with two pump chambers of similar size. The auxiliary chamber of the present disclosure has a smaller capacity than the main chamber.

Abstract: A pump having a pump chamber arranged to receive liquid to be pumped and air, a delivery pipe for delivery of the liquid by the air to a location remote from said pump chamber, an air pipe for flow of air therein. The delivery pipe and pump chamber are in fluid communication, as are the air pipe and said pump chamber. A first air flow control to control air flow via said air pipe during first and second stages of a pumping cycle of the pump. A timer controls the operation of said first air flow control to thereby set the durations of said first and second stages of said pumping cycle. A first valve allows liquid to enter said pump chamber. Wherein in said first stage of the pumping cycle of the pump, the first air flow control allows air to be directed via said air pipe to said pump chamber for a time period set by said timer to cause liquid to be pushed from said pump chamber into said delivery pipe with the air for delivery via said delivery pipe to said location.

Abstract: A product pump assembly including a product pump having a product receiving inlet, a product discharge outlet, a product chamber, and an air port. A cone-shaped feed valve in the product chamber is forced upwards against the inlet thereby sealing it when pressurized air is forced through the port into the chamber, during the evacuation cycle of the pump assembly. The pressurized air is deflected against the valve sweeping the product out of the chamber through the outlet and via a delivery line to the product collector. An ejector is energized during the fill cycle to withdraw the air from the chamber through the air port, thereby opening the valve and pulling the product into the chamber.

Abstract: Methods and apparatus for the recovery of petroleum origin hydrocarbons and other liquids from underground at sites of refineries, oil, gasoline and other liquid storage and distributing facilities, tie creasoting plants, and the like. Pursuant to the invention, for petroleum origin hydrocarbon recovery, separate liquid handling devices, each in the nature of a vessel or canister and having liquid trapping and ejecting facilities that are free of mechanical pumping action, are employed for raising the ground water and liquid hydrocarbons that accumulate on the ground water table, respectively, through which the well or wells extend, and under the static pressure of the compressed air.

Abstract: Methods and apparatus for the recovery of petroleum origin hydrocarbons from ground water tables at sites of refineries, oil and gasoline storage and distributing facilities, and the like. Pursuant to the invention, separate liquid handling devices, each in the nature of a vessel or canister and having liquid trapping and ejecting facilities that are free of mechanical pumping action, are employed for raising the ground water and liquid hydrocarbons that accumulate on the ground water table, respectively, through which the well or wells extend, and under the static pressure of the compressed air.

Abstract: Methods and apparatus for the recovery of petroleum origin hydrocarbons from ground water tables at sites of refineries, oil and gasoline storage and distributing facilities, and the like. Pursuant to the invention, separate liquid handling devices, each in the nature of a vessel or canister and having liquid trapping and ejecting facilities, are employed in a well or wells at the site for separately raising the ground water and liquid hydrocarbons that accumulate on the ground water table, respectively, through which the well or wells extend, under the static pressure of compressed air and free of mechanical pumping action on the liquids.

Abstract: Methods and apparatus for the recovery of petroleum origin hydrocarbons from ground water tables at sites of refineries, oil and gasoline storage and distributing facilities, and the like. Pursuant to the invention, separate liquid handling devices, each in the nature of a vessel or canister and having liquid trapping and ejecting facilities, are employed in a well or wells at the site for separately raising the ground water and liquid hydrocarbons that accumulate on the ground water table, respectively, through which the well or wells extend, under the static pressure of compressed air and free of mechanical pumping action on the liquids.

Abstract: For starting and stopping air injection, a pneumatic ejector for a liquid transport system typified by a municipal sewerage system is provided with an air release valve fitted with a limit switch as a control device.

Abstract: A device using only steam to simultaneously heat and pump a liquid or a slurry to a high pressure is disclosed, which device does not employ any rotating or reciprocating mechanisms commonly employed in the conventional pumping machinery. The combined use of steam for the simultaneous heating and pumping enables the outstanding device to utilize 100 percent of the steam supplied to the device in either pumping or heating. The simple structure and operational principle of said device results in particularly low capital cost and trouble-free operation.

Abstract: A generally elongated cylindrical pump adapted to be lowered into a fluid producing formation comprising a hollow annular outer chamber circumferentially about a hollow cylindrical inner chamber, a valve mounted in said inner chamber, a source of compressed gas adapted to be applied to said valve, a float reciprocally mounted in said inner chamber coacting with said valve to apply said compressed gas to said inner chamber when said float is raised to a predetermined height and the fluid is then forced through said outer chamber to an outlet bore; the compressed gas applied to said inner chamber is cut off when such pumping operation is completed.

Abstract: A pneumatic sewage ejector includes a tank for holding fluid sewage. When the sewage reaches a predetermined high level in the tank, it is ejected by pressurized air forced into the tank through a valve located inside the tank. The ejection of the fluid is initiated by a float which responds to the high fluid level in the tank by ascending and thereby moving the valve to an air-input position to admit pressurized air into the tank to expel fluid. The valve remains in the air-input position until the fluid reaches a low level, at which time the float descends and moves the valve to a vent position to vent the pressurized air to the atmosphere. The float moves the valve between the air-input position and the vent position in one discrete step so that the valve cannot stop in an intermediate position.

Abstract: A latching liquid-level sensor including a vertically mounted free-floating float member which carries a magnet. A second magnet or ferromagnetic member separated from the first magnet by a liquid- and gas-impervious barrier is selectively actuated by the first magnet. The second magnet or ferromagnetic member is connected to a control logic system which is isolated from the float member which may be hermetically contained in a highly corrosive or explosive environment.

Abstract: The invention is concerned with an improvement in a gas pressure driven pump which comprises a vessel, means for introducing a liquid into the vessel, means for preventing reverse flow of the liquid into the liquid introducing means, means for introducing a pressurized gas to the vessel, and means responsive to a gas pressure increase in the vessel for flowing the liquid out of the vessel. The invention is an improved system for controlling the flow of pressurized gas into the vessel responsive to the liquid level therein, which system is substantially independent of the density of the liquid. More specifically the improved system comprises a valve having a first, a second and a third port, the valve providing a first mode in which the first port is in communication with the second port and a second mode in which the first port is in communication with the third port. The second port communicates in both modes with the surrounding outside atmosphere.