Borehole reciprocating pump assembly with an air chamber acting as a hydraulic shock absorber for the pumped fluid
a technology of reciprocating pump and air chamber, which is applied in the direction of positive displacement liquid engine, wellbore/well accessories, greenhouse gas reduction, etc., can solve the problems of buckling the long train of pump rods and generally not being practical to have a riser open to the atmosphere, and achieves the effect of increasing the capacity and great usable volum
Active Publication Date: 2018-11-15
HAMMER WENDELL
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Benefits of technology
This patent is about a new invention of a borehole pump assembly that works with a windmill. This assembly includes a reciprocating pump that is connected to a turbine and a chamber that absorbs shocks between the pump and a delivery pipeline. This design reduces the shock loads on the pump and delivery pipeline when delivering water from a well. Another design feature is the use of a secondary chamber to further absorb shocks if the pump needs to deliver water over a long distance. The invention helps to keep water moving smoothly through the pump, reducing the chances of pump damage and wear.
Problems solved by technology
Higher pumping speeds tend to buckle the long train of pump rods by not giving the pump rods and piston sufficient time to fall back on the down stroke under gravity.
Where the pump delivers into a pipeline which discharges at a significantly higher level, it is generally not practical to have a riser open to the atmosphere at or near the pump, since it obviously would have to extend to a height above the level of the discharge.
Further, the friction from the passage of the water within a smaller riser pipe, particularly one with a large bore pump can create problems.
Method used
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Embodiment Construction
[0061]According to a particularly preferred embodiment of the present invention, a borehole pump assembly including an in-hole air chamber immediately adjacent the pump is provided.
[0062]As discussed above, a schematic of a borehole pumping assembly illustration the locations of the components relative to one another is included in FIG. 2.
[0063]As illustrated in FIG. 2, the well 10 has a well casing 11 which is located in the ground. The well casing 11 is typically reinforced an upper portion by a concrete slab 12. Above the concrete slab is the wellhead 13 with the water delivery pipe 14 leading away from the well 10.
[0064]As illustrated, a riser pipe 15 is located within the well casing 11 extending down below the water table.
[0065]An elongate pump rod 16 extends from outside of the wellhead 13 at the top of the well 10 to a location below the water table where the pump 18 is located.
[0066]As illustrated, the pump rod 16 is made up of a number of elongate pump rod portions connect...
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A borehole pump assembly operable in association with for a borehole with a well casing therein, the borehole pump assembly including an elongate pump rod operably connected to a reciprocating drive and mounting a reciprocating pump at the lower end within the well casing and an air chamber provided immediately above the reciprocating pump and concentrically about the pump rod to provide hydraulic shock absorption between the reciprocating pump and a delivery pipeline.
Description
TECHNICAL FIELD[0001]The present invention relates to borehole pumps and in particular to a down hole air chamber for a borehole pumping assembly.BACKGROUND OF THE INVENTION[0002]When groundwater is deep, or the ground is hard to dig, boreholes are generally quicker and less expensive to construct than dug wells. Most boreholes are lined with either a 100 mm or 150 mm steel or plastic rising main, so the pump must be small enough in diameter to fit down it.[0003]Ideally, bore hole diameters need to be kept small (large boreholes are very expensive to drill) the best way to obtain a larger output from a borehole pump is to increase its stroke. The speed of operation of borehole pumps is usually restricted to about 30 strokes a minute, although a few operate at up to 50 strokes per minute. Higher pumping speeds tend to buckle the long train of pump rods by not giving the pump rods and piston sufficient time to fall back on the down stroke under gravity. Obviously, with any depth of bo...
Claims
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IPC IPC(8): E21B43/12F03D9/00F03D11/04F03D1/06F04B47/04F04B47/02F04B53/14F04B53/16
CPCF03D9/10E21B43/127F04B53/16F04B47/04F04B47/026F04B53/145F03D1/06F04B47/02F03D9/28Y02E10/728Y02E10/72Y02E70/30E21B43/126F04D13/10F03D13/20
InventorHAMMER, WENDELL
OwnerHAMMER WENDELL