US2084645A - Well pump - Google Patents

Description

E. AI KLIEWER June 22,1937.

WELL PUMP Filed May 2 2, 1956 4 Sheets-Sheet l ATTORNEY.

June 22, 1937.

E. A. KLIEWER 2,084,645

WELL PUMP Fild May 22, 1936 4 Sheets-Sheet 2 L E'IE-Z- IN VE OR. BY

ATTORNEY.

June 22, 1937. E. AfKLlEWER WELL PUMP Filed May 22, 19:56 4 Sheets-Sheet 3 IN VENT OR.

zalaawAmzzep ATTORNEY.

June 22, 1937. .E. A. KLIEWER 2,084,645

7 WELL PUMP Filed May 22, 1936 4 Sheets-Sheet 4 ATTORNEY.

Patented June 22, 1937 UNITED STATES PATENT OFFICE WELL PUMP Edward A. Kliewer, Longview, Tex.

Application May 22, 1936, Serial No. 81,179

7 Claims.

This invention relates to well pumping equipment and it has particular reference to an apparatus for reciprocating the pump rods in oil and other wells.

The principal object of the invention is to provide in a well pumping apparatus a means intermediate the power and the well for materially increasing the rectilinear travel of the pump rods over the distance heretofore resulting from the travel of the walking beam, that is to say, with the improvements alforded by the invention, conventional travel of the walking beam will substantially double the stroke of the pump rods.

Another'object of the present invention is to increase, by reason of the longer stroke obtained, the production of a well which is obviously due to the fact that the column of fluid elevated is greater than that raised by the ordinary stroke and without requiring additional power in so do- Still another object of the invention is minimized wear on the rods and valves in proportion to the quantity of fluid displaced. Moreover, the movement transmitted to the polished rod through the walking beam is strictly perpendicular, hence the wear on the polished rod is negligible, and as a consequence, replacements of packing in the stuifing box are not as frequently required as under conventional circumstances.

With the foregoing objects as paramount, the invention has other and lesser objects which will become manifest as the description proceeds, taken in connection with the accompanying drawings, wherein:

Figure 1 is a side elevation showing the pump of the invention.

Figure 2 is a front elevation.

Figure 3 is a plan view of the gears on line 33 on Figure 2.

Figure 4 is an elevation of Figure 3.

Figure 5 is a fragmentary perspective view showing the support for the vertically reciprocable rack bar.

Figure 6 is a fragmentary plan view of a modi- 5 fied form of the invention.

Figure 12 is a fragmentary front elevation of the modified form of the invention.

Continuing with a more detailed description of the drawings, I designates a base structure, preferably of I-beams, superimposed upon which is a Samson post 2 suitably braced at 3 and 4. A jack post 5 is disposed on the rearmost portion of the base I and braced by angular members 6. The top of the jack post 5 supports a bearing 1 in which is journaled the stub shaft 8 of a crank 9.

To the crank 9 is pivotally connected at a the end of a pitman arm ID, the upper end of the latter being provided with a stirrup H which receives an end of the walking beam I2.

The walking beam is fulcrumed at b in the bearing 13, superimposed upon the Samson post 2.

It is a fact known to those skilled in the art that by lengthening the stroke of the pump rods in the well without adding to the amount of power required to actuate the walking beam, a. considerable saving in frictional wear on the rods and valves, due to vibration, will be effected. Of the greatest importance however, is the fact that by a longer stroke of the pump, more fluid per pump cycle is displaced.

Heretofore, efforts to increase the length of the stroke of a pump have been more or less confined to the power end of the walking beam. The present invention is, when a walking beam is employed, effective on the operative end of the walking beam, although it will become apparent that the walking beam may be omitted and that a power source can be disposed adjacent the well and through the elements of the invention the pump rods may be reciprocated with practical efficiency.

Accordingly, and with reference to Figures 1, 2 and 3, the invention provides a primary rack bar M which, at its lower end is connected to the polished rod [5, which latter in turn is connected to the string of pump rods, not shown, in the well. On either side of the rack bar I4 is a channel iron I6 (Figures 3 and 5), providing tracks for rollers H which serve to constrain the rack'bar to move perpendicularly.

These rollers are supported by brackets I8 or equivalent means, which are in turn supported upon cross-members I9, carried by standards 20.

On either side of the rack bar 14, there is provided stub shafts 2|, each carrying a small gear 22 and a large gear 23. The ends of these shafts are journaled in bearings 724 mounted on the cross members 19.

It will be observed that while the ratio of the gears 22 and 23 in the drawings is approximately 1-2, such ratio may be varied without departing from the intent of the invention since it is obviously the object to increase predeterminately the displacement of the pump rod string over the vertical displacement of the operative end of the walking beam.

The smaller gears 22, as apparent especially in Figure 3, engage the gear teeth of the secondary racks 25 which are disposed in parallel relation ship with each other, and with the rack M. It is to these racks 24 that the operative end of the walking beam i2 is connected, as shown in Figure 1.

In order that the racks 24 will be permitted to travel vertically without lateral stresses, the walking beam i2 is flexibly connected therewith through the medium of a cable 25, connected to the horse head 26, with equalizer wheel 2'! and rein spacers 28.

It is apparent from the foregoing that through the flexible connection afforded by the cable 25, the rack bars 2 3 are reciprocated vertically, following the guide of the gears 22. The gears 22 are thus rotated to rotate the shafts 2! on which they are amxed. Such rotation similarly operates gears 23 of greater ratio than gears 22 and these gears, being in engagement with the teeth of the rack bar it, move the latter, similarly but twice the distance of the displacement of the companion rack bar 2 Thus the rod string to which the bar M is connected, is reciprocated a distance much greater than the vertical displacement of the end of the walking beam I 2.

In Figures 6 and 7 is shown a modified view of a means for accomplishing a result similar to that just described. In these figures, the reference numeral 29 denotes a yoke or horse head in the form of two arcuate members, one being disposed on either side of walking beam 30. The arcuate surfaces of the members 29 are provided with gear teeth which enmesh the teeth of gears St. The gears 3! are aifixed to a stub shaft 32 and upon this same shaft is mounted a gear 33 of greater ratio than gears 3|.

Gear 33 is, as apparent in Figures 6 and 7, engaged with a gear rack 34. This gear rack is connected to the string of pump rods in the well although the rods are not shown.

In order to hold the rack 34 in operative relationship at all times with the gear 33, a roller 35 bears thereagainst and is supported by a channel iron or an equivalent means 36, extending upwardly between the arcs 29 and braced by suitable means 3'? adjacent its lower end.

It is apparent from the foregoing that the distance the rack bar 34 is displaced will be substantially greater than the vertical displacement of the walking beam 30, due to the difference in ratio between the gears 3| and the gear 33..

In Figure 8 is shown an example of multiple gearing in which the rack bars 38 are comparable to rack bars 24 in Figure 3 and are reciprocated indirectly by intermediate gears 39, which latter are rotated by gears 40 on shafts 4!.

In some cases, it will be desirable to provide means to effect adjustment of the pumping apparatus over the well hole. Such alignment is afforded by the medium shown in fragmentary detail in Figure 9. In this view the beams l are shown as being provided with elongated slots 42 to receive the bolts 0 of the gusset plate 43. The shape of these slots enables the plates 43, supporting the standard 20 to be laterally displaced,

thereby making it possible to align the pumping apparatus with the well hole.

It is to be noted that the particular supporting structure for the pump is so constructed and disposed relative to the well hole that when a well cleaning operation is necessary or any other operation requiring displacement of the pump from the well, such displacement is made easy and inexpensive.

With reference to Figures 10 to 12 inclusive, a further modified form of the invention is shown. In these figures, M denotes the walking beam, having the usual horse-head S5 thereon and cable 46, surrounding the sheave ll. The sheave M carries a yoke d8 which supports a hanger 9 for a roller chain 50.

As apparent in Figure 12, the chain d depends and passes under sprockets ti on either side of the walking beam and which sprockets are mounted on stub shafts 52, journaled in bearings 53 on the standards 54 and 55, spaced apart.

Immediately above the sprockets 5i are smaller idling sprockets 5%, over which chains 56 pass, the latter continuing downward between the shafts 52 to support a weight 5?, by means of a flexible member 58. The weight 5? operates in a suitable guide 59 intermediate the two standards 5 i and 55 and it serves as a counter-balance for the load imposed on the walking beam, it being apparent that the wrapping of the chain 58 about the sprockets provides for reverse movement of the weight relative to the walking beam 44.

Mounted also on the shafts 52 are gears 66, whose teeth engage those of a rack bar 6!, the lower end of which is connected to the polished rod 62, the latter in turn being joined to the pump rod assembly (not shown) in the well.

Accordingly, upon downward stroke of the walking beam 44, the weight 51 moves downward in its guide 59, but the rack bar 6! moves upward through the action of gears 69, thereby lifting toward the surface a column of fluid. It is apparent that due to the difference in ratio between the gears 68 and sprockets 5i the displacement of the rack bar 61 and hence the pump rods will be much greater than the vertical displacement of the operative end of the walking beam M. Also, it will be noted that the weight 57 is counter to that of the load lifted by the walking beam, counter-balancing the rods and fluid and relieving the power of the excess load.

Manifestly the construction shown and described is capable of considerable modification and such modification as may be considered within the scope and meaning of the appended claims is also considered within the intent of the invention.

What is claimed is:.

1. In a well pumping apparatus, a primary rack bar having connection with the pump rods in said well, gears disposed on shafts and on either side of and operatively engaging the teeth of said primary rack bar, gears of lesser ratio than said first gears and affixed on the shafts of said first gears, a secondary rack bar for actuating said latter gears and means for reciprocating said secondary rack bar for similarly moving said first rack bar, thereby to eifect reciprocation of said pump rods.

2. Well pumping apparatus including in combination with a string of pump rods in said well, a primary rack bar connected to said string of pump rods, gear means engaging said rack bar, a secondary rack bar in substantially parallel relationship with said first rack bar, second gear means of lesser ratio than said first gear means and rotatable therewith for reciprocating said secondary rack bar to translate motion to said first gear means and rack bar, thereby to effect rectilinear travel of said string of pump rods.

3. Well pumping apparatus including in combination with a string of pump rods in said well, primary and secondary rack bars, the primary 7 rack bar being connected to said string of pump rods, means for imparting to said secondary rack bar a reciprocating motion and intermediate means for similarly actuating the companion rack bar but in displacing the same to a greater degree than the displacement of said first bar.

4. Pumping apparatus for wells including in combination with a string of pump rods in said wel1,'a walking beam, a primary rack bar having connection with said rod string, a secondary rack bar, means for actuating said walking beam and means carried by the operative end of said walking beam, having operative connection with said secondary rack bar whereby to effect greater vertical displacement of said string of pump rods through said primary rack bar than the vertical displacement of the operative end of said walking beam.

5. Apparatus for displacing fluid in wells comprising in combination with a string of pump rods, a primary rack bar connected to said rod string,

means for constraining said bar to move rectilinearly, a secondary rack bar, a walking beam for actuating said secondary rack bar and gear means transmitting motion from said secondary to said primary bar for causing said latter bar to move substantially twice the distance of the vertical displacement of the operative end of said walking beam.

6. Apparatus for pumping wells including in combination with a string of pump rods, a walking beam, a vertically reciprocable and primary rack bar member connected to said string of pump rods, and a secondary rack bar actuated by the operative end of said walking beam for reciprocating said primary bar whereby the displacement thereof will be substantially greater than the vertical displacement of the operative end of said walking beam.

7. A well pumping apparatus including in combination with a string of pump rods in a well, a walking beam, flexible means operatively connecting the operative end of said Walking beam operatively to said pump rod string, said means being capable of displacing said rod string to a degree greater than the vertical displacement of the operative end of said walking beam and means suspended by said flexible means for counterbalancing the weight of said rod string and its load.

EDWARD A. KLIEWER.

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