Combination cup and plunger oil well pump

Feb. 6, 1940. f. wilcom et al 2,189,237

COMBINATION CUP AND PLUNGER OIL WELL PUMP

<img file="US2189237A_D0001.tif" />

Feb» 6, 1940. f. wilcom et al 2,189,237

COMBINATION CUP AND PLUNGER OIL WELL PUMP

<img file="US2189237A_D0002.tif" />

Feb. 6,-1940. f. wilcom et al 2,189,237

COMBINATION CUP AND PLUNGER OIL WELL PUMP

Filed July 21, 1937 3 Sheets-Sheet 3

<img file="US2189237A_D0003.tif" />

Patented Feb. 6, 1940

2,189,237

UNITED STATES PATENT OFFICE

2,189,237

COMBINATION CUP AND PLUNGER OIL ' WELL PUMP

Frank Wilcom and Robert D. Thompson, Okmulgee, Okla.

Application July 21, 1937, Serial No. 154,870

Claim. (Cl. 103—204)

This invention has reference to oil well pump construction, the primary object of the invention being to provide an oil, well pump of the cup and plunger type which will be substantially 5 sand proof, means being provided for scraping sand and foreign matter from the pumping tube, forming a part of the pump construction, during the operation of the pump.

Another object of the invention is the pro10 vision of scraping means of the automatically adjustable type, to the end that the scraping means will be held into dose engagement with the pumping tube at all times, thereby compensating for wear between the pumping tube and 15 scraper.

Another object of the invention is the provision of a pump construction including sand flushing means to direct the sand and foreign matter removed by the scraper, from returning 20 to a point between the pump and housing.

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 ²⁵ 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 inven.._n tion.

Referring to the drawings:

Figure 1 is a longitudinal Sectional view through the pump tubing and a pump constructed in accordance with the invention, the view illustrating the upper end of the pump.

³⁵ Figure 2 is a longitudinal sectional view through the pump tubing and that portion of the pump directly under the upper section of the pump shown by Figure 1, and clearly illustrating the scraping means.

^{4 J} Figure 3 is a longitudinal sectional view through the pump tubing and that portion of the pump directly under the section of the pump illustrated by Figure 2 of the drawings.

,_r Figure 4 is a longitudinal sectional view through ⁴ⁱ’ that portion of the pump tubing and pump forming a continuation of the tubing and pump section illustrated by Figure, 3 of the drawings.

Figure 5 is a longitudinal sectional view through the lower portion of the pump tubing and pump, ' illustrating the cups and means for supporting the cups.

Figure 6 is a longitudinal sectional view through the lower portion of the pump tubing and pump, 53 directly below the structure., shown by Figure 5. of the drawings.' /

Figure 7 is a longitudinal sectional view through the lower extremity of the pump tubing and pump, illustrating the lower ball valye, forming CO a part of the structure

Figure 8 is a fragmental sectional view through the pump housing, illustrating the scraping means, in elevation.

Figure 9. is a longitudinal sectional view through the pump housing at a point adjacent to the 5 scraping member, the scraping member being also shown in longitudinal section. .....

Figure 10 is a sectional view taken on line 10—10 of Figure 2.

Figure 11 is a transverse sectional view taken jo on line ii—11 of Figure 2.

Figure 12 is a transverse sectional view taken on line 12—12 of Figure 8.

Figure 13 is a sectional view taken on line 13—13 of . Figure 8. 15

Figure 14 is a transverse sectional view taken on line ,14—14 of Figure 5.

Figure 15 is a sectional view taken on line 15—15 of Figure 5.

Referring to the drawings in detail, the nu- 20 meral 5 designates the tubular pump housing, which extends throughout the entire length of thepump.

Supported within the pump housing 5, is a tubular working barrel indicated by the reference character .6, and in'which the pumping tube 25 indicated by the reference character 1 operates,

At the upper end of the pumping tube- 7, is a coupling 8, which coupling connects the valve cage 9 with the connecting rod 10 of the pump rod. The upper end of the connecting rod 10 30 is threaded at 11, so that the pump rod may be readily connected thereto.

Disposed between the coupling 8 and valve cage 9, is a valve seat indicated by the reference character 12, against which the ball valve ^3S13 seats, during the upstroke of the pumping tube. Mounted at the upper. end of the working barrel 6, is a scraper embodying a pair of spaced members 14, the members 14 being constructed to closely fit against the pumping tube 40 7, the members being held into engagement with the pumping tube 7, by means of the coiled springs 15, which are shown as positioned within circumferential grooves formed in the spaced members 14, the springs acting to normally urge 45 the spaced members 14 towards each other. Thus it will be seen that due to this construction, when the pumping tube operates within , the working barrel, the upper edges of the spaced members 14 will act to scrape sand or other 50' foreign matter, from the pumping tube, where it may fall downwardly into the space between the scraping member and pump housing 5. Formed at the lower end of each of the spaced members of the scraper, is an inwardly extended flange 16, the flanges being fitted in an annular groove formed in the coupling 17, the coupling being provided with openings near its upper end; for the reception of the balls 18 that contact.

2,189,237 tions of the valve cup 38, associated therewith, so that the heel portion of the valve cup 38 will be held against crawling from between the shoulder and the cup ring 39, which cooperates with the valve cup 38. The upper end of the cup ring with the pumping tube 7, reducing friction between the pumping tube and working barrel, to the end that the pumping tube may be operated with a minimum amount of power.

The coupling 17 is formed with internal threads that accommodate the external threads of the 39 is also formed with a groove so that portions coupling 19, the coupling 19 being formed with of the cup 38 will be forced into the groove, an offset portion 20 which connects with the pipe insuring a tight fit between the cup 38, shoulder section 2ί of the working barrel. The offset por- ~ tion 20 is formed with a plurality of openings 22 which establish communication between the space directly above the coupling 19 and the space between the working barrel and pumping tube 7.

As clearly shown by Figure 2 of the drawings,.....by means of the valve cups 38 which are held the coupling 17 has its lower end spaced from the offset portion 20 of the coupling 19, providing a space for the vertically moving valve member 23, Which is designed to close the openings in the offset portion 20, on the downstroke of the pumping tube 7, the valve opening to release fluid, through the openings, on the upstroke of the pumping tube;

On that section of the working barrel directly below the sand scraping member, are packing rings 24 which are held in spaced relation with each other, by means of the spacing rings 25, the rings 25 being split and formed with beveled surfaces cooperating with beveled surfaces of the packing rings 24, so that the packing rings 24 are 30 urged outwardly to insure a close fit between the packing rings and the section of the working barrel, in which the packing rings operate. Openings 24' are provided in the offset portion 25' of the pipe section 26', the openings being closed by the valve 27' on the downstroke of the tube 7, but opened to release fluid on the upstroke of the- tube 7-. The pumping tube 7, which embodies a plurality of connected sections, has certain of its sections connected by means of couplings such as indicated at 26', in Figures 4 and 7, of the drawings, which couplings support valve seats 2-7 against which the ball valves 28 seat, to prevent liquid from passing downwardly through the pumping tube. Directly above each valve 28, is a guard 29 formed with openings 30 so that liquid may pass upwardly through the pumping tube, and at the same time the ball valve associated therewith will be restricted in its upward movements. It might be further stated that one of these valve members 28 is provided at the lower end of the pumping tube. The lower end of the working barrel, which is indicated by the reference character 30' is beveled, as clearly shown by Figure 7 of the drawings, and fits against an inclined surface 31 of the coupling 32 at the bottom of the well. Mounted on the pumping tube 7, and disposed in predetermined spaced relation with respect to each other, are scrapers 34, which are so constructed that they are spaced from the pumping tube 7, and closely engage the inner surface of the working barrel 6. The upper edges of these scrapers 34, are beveled as at 35 providing knife-like scraping edges to scrape the inner surface of the working₆5 barrel, removing sand and foreign matter therefrom, which sand and foreign matter falls into the space between the scrapers and working barrel and is prevented from passing downwardly to the valve cup assembly or packing rings disposed thereunder.

At the lower end of the pumping tube 7, is the valve cup assembly which includes the tubular valve body section 36 which has a portion of its length cut away defining a shoulder 37, which ₇₆ shoulder is formed with grooves to receive por37, and cup ring 39. It will of course be understood that the valve cup assembly includes a plurality of valve rings 39, which are identically constructed, and arranged one above the other, the valve rings 39 being held in spaced relation between adjacent ends of the valve rings 39. At the lowermost end of the tubular valve body section 36, is a substantially long valve ring 40, which is held in position by means of the nut 41, threaded on the lower end of the tubular valve body section 36. '

On the upstroke of the pumping tube 7, fluid is drawn in through the stationary standing valve, ball 20 and seats 27, filling the chamber directly above the ball valve, to its capacity. On the down stroke, fluid is forced out of the chamber which automatically opens the first valve 23 thereof, filling the chamber between the pumping tube and working barrel, the balance of the fluid discharging through the ball valve at the upper end of the pumping tube. As the plunger assembly moves upwardly with the pumping tube, fluid is forced upwardly, closing one flush valve and opening the flush valve thereabove, washing out all sand and sediment which have been removed by the sand scrapers, and carrying the sand and sediment to the upper end of the pumping tube, far above the pump. The uppermost flush valve closes on the down stroke of the pumping tube, allowing no back suction, thus preventing any sand and sediment being drawn back into the flushing chamber, which fills with fluid from the chamber therebelow, all fluid passing into- the chamber moving through the center of the pump.

It might be further stated that due to the construction shown and described, the pumping tube and pump element may be removed without sand interference, the sand being washed away with every stroke of the pump, to the end that the sand and sediment constantly moves upwardly, the fluid remaining stationary in the chambers until the next movement of the pumping tube causes the fluid to move to the adjacent upper chamber. '