US2046891A - Pumping unit - Google Patents

Description

y 1936- J. o. ANDREE ET AL 2,046,391

PUMPING UNIT Filed June 17, 1935 2 Sheets-Sheet 1 Patented July 7, 1936 Y UNITED STATES PUMPING UNIT.

John 0. Andree and Sydney R; Youngblood,

Wichita Falls, Tex.

Application June 1'7, 1935, Serial No. 26,975 Claims. (01.74-41) This invention relates to oil well pumping equipment and it has particular'reference to pumping units capable of actuating.

The principal object of the invention is to provide certain new and useful improvements in straight lift pumping units wherein the'novel combination of elements for rotating the pump rod assembly in a well is such that friction is reduced to the very minimum and requires but little lubrication and attention. Moreover, the invention provides certain adjustments for various parts to adapt these parts to peculiar-conditions under which the pumping unit is required to operate, thereby insuring at all times movement of the rods in a strictly vertical path whether the plane of movement is precisely perpendicular to the base of the unit or slightly displaced.

Another object of the invention is to provide a convertible frame, that is to say, a framed on which the pumping elements may be operated by a'single power unit or by a rod line assembly from a remote power source. a I I l Still another object of the invention istoiprovide a straight lift equipment for conventional types of mechanical pumping jacks and which by little variation, may be readily appliedv toisuch units to overcome the objectionable strains and stresses to which the piunp rods are subjected by the ordinary walking beam of conventional types of pumping jacks. r

With the foregoing objects as paramount, the invention has particular reference to its. salient features of construction and arrangement of parts which will become manifest as the description proceeds, taken in connection with the accompanying drawings; in which:-

Figure 1 is a perspective view of a complete pumping unit constructed according to the present invention.

Figure 2 is a detail perspective view of the invention as an attachment or of that part of Figure 1 which transforms the arcuate travel of the walking beam into a perpendicular plane with respect to the major axis of the base.

Figure 3 is a fragmentary detail view on lines 3-3 on Figure 2 showing certain adjustments of the cam, and

Figure 4 is a fragmentary detail view showing the connection to the upright for the springs holding the jack or auxiliary beam normally under tension.

Continuing with a more detailed description of the drawings, reference is primarily made to Figure 1 wherein the base I is shown as being comprised ofv parallel channel members in confronting relationship, reinforced and spaced apart by transverse elements 2.

Disposed upon the base I is a support 3 for the walking beam 4 and'is comprised preferably of 5 confronting channel irons which are held in rigidspaced relationship by cross members 5' and by the superimposed bearing block 6. A stub shaft 1 is journaled in the bearings and provides the fulcrum for the Walking beam 4. I

The cross members -5 serve the additional function of affording a mounting for the substantially vertical member 8 which constitutes a track or abutment on which rocks the cam 9. The cam 9' is arcuately grooved at ID, as shown in the broken portion of thecam in Figure 2. This groove conforms in'cross section to the curvature of the vertical member 8, which may be constructed of a rod or pipe butpreferably thelatter in view of the greater resistance afforded by a.

tubular member over a solid cylindrical member.

Reference to Figures 2 and 3 will disclose rods H at the upper and lower ends of the member 8 which pass through slots l2 in the cross members 5 and through apertures in the'vertical member 8, Lock nuts [3- securely hold the member 8 in adjusted positions and it apparent that either end of the member 8 may be moved outwardly,

inwardly or to and fro with respect to the cross 'midway of the endsof the jack beam I4 is connected the ends of a pair of springs I6. The opposite ends of these springs are connected at I! to the uprights 3. Consequently, there is a 40 continuous tension on the jack beam and which may be adjusted, as apparent in Figure 4 by loosening or tightening the nut l8 threaded on the end of the eye I! which passes through the upright 3.

At a point adjacent the upper end of the upright or walking beam 3 is a transverse rod 19. The cam 9 is swingingly suspended from this rod or shaft H! by means of links or by the U shaped member 20, which in the present case has its ends looped over the shaft l9 with the bight portion reposing in a recess in the lowermost portion of the cam 9. Thus it will be seen that this member 20 is the sole support of the cam, allowing it to rock freely as the jack beam I4 is moved and is held tensionally against the abutment 8 by the springs l6.

From the operative end of the walking beam 4 is suspended the connection 2| in the form of a loop, the bight portion lying in a U shaped bearing 22 securedto the end of the walking beam 4 while its ends are hooked about a pin 23 passing through the jack beam l4 adjacent its outer end. A suitable spacing means maybe provided. between the ends of the member 2| at their point of engagement with the pin 23.

At the extreme outer end of the jack beam; l? is a rod clamp or connection 24 engaging the polished rod 25 which enters the well and is connected to the pump rod assembly therein.

A bearing block 26 is mounted on the walking beam at its opposite end and in which is j ournaled a shaft 21. To this shaft is connected links 23 which engage a shaft 29 on the crank 30. The

shafts of this crank are journaled in bearings provided on the standards 3 I. the latter being mounted adjacent the rear end of the base I. A counterbalanced wheel 32 is carried by one of the'crank shafts and may be of conventional design. This wheel is provided in either adaptation of the pumping unit, that is tosay, it may be operated by an individual power sourceorbya rod line assembly from a distant power source.

In the case of its operation from a distant power source, a depending frame 33 or its equivalent is provided and which has a loop 34' at or adjacent to its lower portion which affords a connection for the rod line. The peculiar manner in which this frame is suspended from the walking beam 4 insures proper balance in the operation of the walking beam. without subjecting any of the moving parts to undue strain.

It is apparent from the foregoing that by suspending the cam from a pointabove the same and allowing it to rock freely on its track andunder spring tension, the highest point of movement of the outer end of the jack beam II will be in precisealinement verticallywith-a point exactly midway between the highest and lowest point of displacement thereof. Consequently, theassembly described, which is extremely simple in construction is capable'oi' reciprocating'the polished rod 25, suggestedin dotted-lines in Figure 2; in a strictly vertical path as exemplified in this figure and which is the desideratum for proper and enduring performance on the part of any type of pumpingunitfor wells.

Manifestly, the construction shown is capable of considerable modification and suchmodification as is considered-within the scope andmeaning of the appended claims is also considered within the spirit and intent of the invention.

What is claimed is:

1. A well pump jack comprising a base and an upright, a walking beam rockably superimposed on said upright, a jack beam having one end suspended by the operative end of said walking beam, and provided with means for engaging a well pump rod assembly, a vertically disposed and hori- Zontally adjustable abutment bar mounted adjacent said upright, a member affixed to said jack beam, having an arcuate surface tensionally held in continuous engagement with said abutment bar to maintain strictly vertical movement of said rods. when movement is imparted to said jack beam by said walking beam.

2. A well pump jack including a walking beam and a jack beam, the latter having engagement with thepump rod in said well, a member having an arcuately curved surface afiixed to the opposite end: of said jack beam and suspended at a point above the longitudinal axis of said jack beam and adjustable means against which said member abuts for rocking movement to insure a strict- 1y vertical path of the operative end of said jack beam.

3. A well pumping unit including a walking beam and a jack beam arranged for connection with the pump rods of said well and means independent of said walking beam for tensionally constraining the operative end of said jack beam to reciprocate said rods in a strictly vertical path when said latter beam is actuated by said walking beam.

4. A well pumping unit comprising a convertible frame having an upright supporting a walking beam, a jack beam below said walking beam and operated thereby for reciprocating pump rods in a well, a cam carried by said jack beam and suspended at itsbottom from a point above the longitudinal axis of said jack beam and means againstwhich said cam movably abuts for constraining the outer end to move in a strictly vertical path.

5. A well pumping unit comprising a horizontal base andan upright supporting a walking beam, an auxiliary beam operated by said walking beam, av cam carried by said auxiliary beam having an arcuate operating surface and means against which saidsurface is operatively applied for imparting a maximum longitudinal thrust to said auxiliary beam at eachextreme position of said walking beam during movement thereof to hold the-freeend of said auxiliary beam to a vertical path.

JOHN 0. ANDREE. SYDNEY R. YOUNGBLOOD.

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