Low well yield control system and method
OwnerRichard W. Kramerinventor
Life of this patent
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Abstract
A low well yield control system and method for preventing over pumping of wells and other fluid reservoirs. The control is positioned in the reservoir and includes a plurality of relief valves which are opened to replenish liquid in the reservoir from the pumped liquid in the event the liquid level is lowered relative to a float.
Claims20
A control system for preventing over pumping of a liquid from a liquid source, said system including a section of riser pipe;
- a plurality of relief valves secured to the riser pipe and spaced at intervals around the riser pipe;
- each valve including a passage communicating the interior of the riser pipe with the exterior of the control system so that liquid flowing through such passage is added to the reservoir and a valving member for fully opening and closing said passage;
- float means movable up and down relative to the riser pipe in response to change in the level of the liquid in the reservoir between uppermost and lowermost positions;
- and operator means connecting each valve to said float means so that the valving member of such valve is progressively moved to open the passage in response to lowering of said float means and to close the passage in response to raising of said float means;
- said operator means closing all of said valves when said float means is in the uppermost position and fully opening all of said valves when float means is in the lowermost position.
A control system for preventing over pumping of liquid from a reservoir including a riser pipe, a plurality of valves having discharge passages communicating the interior of the riser pipe with the exterior of the control system, a float vertically movable in response to change in the level of liquid in the reservoir, and a connection extending from each valve to the float for opening and closing the valve in response to the vertical position of the float, a first connection operable to commence opening a first valve when the float is in a first position and said second connection operable to commence opening a second valve when the float is in a second position located below said first position so that said valves open sequentially upon lowering of the float.
The method of pumping liquid from a reservoir without over pumping, comprising the steps of:
- A. Pumping liquid into a riser pipe at a given rate;
- B. Upon lowering of the liquid in the reservoir to a first level commencing to open a first valve communicating the interior of the pipe with the reservoir and thereby flowing liquid through said valve back into the reservoir to replenish the same;
- C. Continuing to open the first valve as the level falls below the first level;
- D. With lowering of the liquid to a second level below the first level commencing to open a second valve communicating the interior of the pipe with the reservoir to flow additional liquid through the second valve back into the reservoir;
- and
- E. Continuing to open the second valve as the level falls below said second level.
The method of pumping liquid from a reservoir and recirculating liquid back to reservoir from the pumped liquid including the steps of smoothly and progressively opening a plurality of valves located in the path of recirculation flow in response to lowering of the liquid level in the reservoir, all of said valves commencing to open one after the other and commencing to open at least one of said valves during opening of another valve.
Dependencies are inferred from the claim text.