US2190407A - Sand pump - Google Patents

Description

C. C. KING SAND PUMP Feb. 13, 1940.

Filed Dec. 19, 1938 IN V EN TOR.

ATTORNEYS.

Patented Feb. 13, 1940 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to sand pumps, the primary object of the invention being to provide a sand pump comprising a plunger including a rubber piston for controlling the passage of liquid and foreign matter through the plunger, thereby eliminating the use of valves wherein valve rings constitute a necessary part of thevalve 'construc tion, and which have proven unsatisfactory and impractical when used in sand.

Another object of the invention is to provide a sand pump of this character embodying a steel plunger of suflicient weight to cause the plunger to gravitate to .the bottom of the well, the rubber piston allowing the liquid and sand or other foreign matter to pass into the plunger, wherethe material may be dumped when the plunger is; withdrawn from the well.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein described, may be made within the scope'of what is claimed, without departing from the spirit of the invention.

Referring to the drawing:

Figure 1 is an elevational view of a pump constructed in accordance with the invention.

} Figure 2 is a fragmental longitudinal sectional, view therethrough.

Figure 3 is an enlarged sectional view through the lower end of the sand pump.

Figure 4 is a sectional view taken on line 4-4 of Figure 2. I

Referring to the drawing in detail, the plunger comprises a tubular casing indicated generally by the reference character 5, the tubular casing including an upper section 6 formed with a threaded extension I afl'ording means whereby a fishing tool may be attached thereto should the plunger 5 become disconnected from the supporting cable of the pump.

The tubular casing 5 provides a cylinder for the pistonlof the pump, which piston is indicated by the reference character 8. This piston is constructed preferably of rubber and is cup-shaped, the upper end of the piston being substantially thin, so that the piston may flex at the upper end to allow material to pass to a point above the piston on the downstroke of the piston, but at the same time prevent material from passing down-' wardly from the upper portion of the tubular casing on the upstroke of the piston.

, between the weight and casing.

The piston 8 is mounted on the threaded stem 9 of the elongated weight III, which is of a diameter appreciably less than the inner diameter of the tubular casing 5, so that a space is provided .between the'weight and wall of the casing, to inwhere it is threaded to fit within a threaded bore of the coupling I3 which is formed with a bore in its upper end to receive the cable I4 by means of which the pump is operated.

Openings indicated by the reference character l5 are formed in the casing 5, the openings being so disposed that the piston 8 will pass above the openings l5, when the piston moves to the limit of its upward movement.

In order to insure against the sand and foreign matter clogging the inner casing, grooves l6 are formed in the periphery of the weight III, the grooves extending longitudinally of the weight providing wide spaces for the material to pass At the lower end of the tubular casing 5 is a coupling sleeve H, the lower end of the sleeve being formed with bayonet slots It in which the pins l9 which extend, from theend member 20, are disposed, there being provided a spring arm 2| adapted to rest against one of the pins, holding the end member 20 against rotary movement with respect to the tubular casing 5. Should it be desired to release the end member 20, it is only necessary to move the spring arm 2| outwardly, and rotate the end member in an anticlockwise direction. The end member 20 may now be pulled from the tubular casing 5.

As clearly shown,-the end member has a tapered extremity 22 whereby the device will dig into the material at the bottom of the well, to dislodge the material'to be pumped by the device.

The end member 20 is hollow and is provided with a pivoted flap valve 23=at its inner end, the flap valve moving upwardly to allow material to pass into the tubular. casing, but close under the weight of the materialwithin the tubular casing, to prevent the material from passing outwardly from the tubular casing 5. From the foregoing it will be seen that due to the construction shown and described, I have provided a pump having a piston 01 a construction to draw material into the casing, on the upstroke of the piston, and prevent the material from passing downwardly past the piston, on the upstroke of the piston. By the use of the piston as described, the number of working parts have been reduced to a minimum, and all check valves usually employed in piston construction, have been eliminated to insure a true operation of the device at all times.

I claim:

1. In a 'sand pump, a casing having openings through which material passes therefrom, a plunger operating within the casing and including a plunger rod, 9. cup-shaped member secured to the plunger rod and having its open side disposed upwardly, the wall of said cup-shaped member tapering inwardly towards the lower end thereof, an elongated weight secured to the pump rod below thecup-shaped member and adapted to balance the movements of the plunger, and

means for controlling the passage of material into the casing under the action of the plunger.

2. In a sand pump a casing having discharge openings, a plunger operating in the casing and including a plunger rod, a cup-shaped member secured to the plunger rod and having its open side disposed upwardly, the upper end of the cup-shaped member adapted to contact with the wall of the casing, the wall of said cup-shaped member tapering inwardly towards the lower end thereof, an elongated weight secured to one end of the plunger rod, said elongated weight being of a diameter appreciably less than the diameter of the casing in which it operates, said weight having grooves formed in the outer surface thereof and extending longitudinally thereof, through which fluid may pass upwardly to the cup-shaped member, and means for controlling the passage of material into the casing under the action of the plunger working in the casing.

CLIFFORD CLAY KING.

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