US1758838A - Pumping jack - Google Patents

Description

H. M. JARVIS PUMPING JACK May 13, 1930.

5 Sheets-Sheet Filed April 11, 1927 May 13, 1930.- I JARVIS 1,758,838

PUMPING JACK Filed April 11, 1927 5 Sheets-Sheet 2 77 -I II May 13, 1930. H. M. JARVIS 1,758,838

PUMPING JACK Filed April. 11, 1927 5 Sheets-Sheet 3 Jr lz jiHETLEH 1*LJELPVL5 y 1930- H. M. JARVIS 1,758,838

PUMPING JACK Filed April 11, 1927 s Shee ts-Sheet 4 EEJE.

Henry M. J afvi's gwuentoz y 930. H. M. JARVIS 1,758,838

PUMPING JACK Filed April 11, 1927 5 Sheets-Sheet 5 mini- Patented May 13, 1930 UNITE STTS PATENT OFFICE HENRY M. JARVIS, OF WINFIELD, KANSAS, ASSIGNOR OF THREE-EOURTHS TO CLARION GEORGE COX, WINFIELD, KANSAS PUMPING JACK Application filed April 11,

This invention relates to improvements in pumping jacks.

The primary object of the invention is the provision of an oil pumping jack having a straight line lifting action on the pump or polish rod; the pumping jack including a novel gear construction comprising a rack connected with the polish rod and a meshing toothed gear wheel or segment operated by 0 the power cable or connection.

A further object of this invention is the provision of an improved pumping jack constituting in itself a complete unit for facile attachment or detachment with respect to a 15 polish rod, which may be quickly removed from the vicinity of the polish rod when withdrawing the pump line or placing the same, and which embodies novel means to adjustably vary the length of pumping stroke and 20 maintain a straight line pull.

Other objects and advantages of this invention will be apparent during the course of the following detailed description.

In the drawings, wherein for the purpose 23 of illustration are shown preferred and modified forms ofthe invention.

Figure 1 is an end view of the improved and preferred type of pumping jack.

Figure 2 is the side elevation of the precu ferred form of pumping jack.

Figure 3 is a vertical sectional view taken substantially on the line 33 of Figure 2.

Figure 4 is a sectional View taken thru the bearing on the frame of the pumping jack 33 whereon different size operating members maybe positioned, the view being taken on the Lline H of Figure 5.

Figure 5 is=a fragmentary sectional view showing details of a gear bearing, the view 49 being taken substantially on the line 55 of Figure 1.

Figure-6 is a fragmentary View, partly in section, showing a clamping block for connecting a gear rack to the upper end of a polish rod of oil well pumping equipment.

Figure 7 is a vertical sectional view taken through details of the clamp illustrated in Figure 6. 7

Cl; Figure '8 is a transverse sectional view 1827. Serial No. 182,778.

taken substantially on the line 8-8 of Figure 6.

Figure 9 is a fragmentary sectional view showing a stabilizing guide bearing for the polish rod rack of the pumping jack.

Figure 10 is a sectional view illustrating details of the adjustable bearing block or guide illustrated in Figure 9.

Figure 11 is a fragmentary sectional View taken through details of the bearing block of Figures 9 and 10, the view being taken substantially on the line 1111 of Figure 9.

Figure 12 is a side elevation of a modified form of pumping jack embodying certain essential features of construction of the preferred form of invention.

Figure 13 is a vertical sectional view taken substantially on the'line 1313 of the modified form of invention of Figure 12.

Figure 14 is a side elevation of a further modified form of pumping jack.

Figure 15 is a vertical sectional view taken substantially on the line 1515 of Figure 14.

Figure 16 is another view of the type of pumping ack illustrated in Figures 14 and 15, showin a different operating position.

Figure 1 is a side elevation of the pumping jack of Figure 16.

Figure 18 is a side elevation of a driven type of pumping ack constituting a further modified form of invention.

Figure 19 is an edge elevation of the improved modified pumping jack of Figure 18.

Figure 20 is a sectionalview taken substantially on the line 20-20 of Figure 18.

In the drawings, wherein similar reference characters designate corresponding parts throughout the several views, the letter A may designate the preferred form of invention illustrated in Figures 1 to 11 inclusive, which includes some features of construction generic to all forms of the invention. Modified types of pump jacks are shown, represented by reference letter B in Figures 12 and 13 of the drawings; a further modificaion C of Figures 14 to 17 of the drawings; and a third modification D of Figures 18, 19 and 20 of the drawings.

v In the preferred and all modified forms of inyention a frame construction is providor. 1. u

ed for supporting the details of the invention, and this frame may vary considerably in structural details; the same being intended merely to show the relation in which the operating moving parts are assembled for a straight line lift on the polish rod of the pumping equipment, with as little energy application as possible, in order to attain the desired results.

In the preferred and modified forms of the invention, a rack bar or toothed member is provided, connected by a clamp construction 26 in vertical axial alignment with the polish rod 27 of the oil well pumping equipment. As is well understood by those skilled in the art, the polish rod 27 vertically extends thru a suitable stutfing box or packing 28 above the casing head 29. The vertical bar or member 25 is preferably straight, having the teeth 30 arranged along one side thereof. At its lower end it is provided with a socket or passageway 31 opening to receive the upper end of the polish rod 27, which is arranged to fit in the passageway 31, in the relation illustrated in Figure 7. The upper end of the toothed bar, rod, or member 25 is provided with a swivel eye or hook 32, to facilitate handling of the member 25, as will be perfectly apparent.

At its lower end the rack bar or rod 25 is provided with a groove 34, the same being formed by peripherally reducing the bar 25, in order to provide. transverse upper and lower shoulders 36 and 37, wherein the clamping device 26 may engage in order to be connected therewith against longitudinal slipping or movement on the bar 25.

The clamp 26 comprises the clamp sections 39 and 40, of a complementary nature, the same being recessed at 41 and 42 respectively on the facing sides thereof, to receive the lower flange on the bar 25, below the groove 34; the segments 39 and having extensions 43 and 44 thereon above the recesses 41 and 42, for fitting peripherally into the groove 34 in engagement against the shoulders 36 and 37, as illustrated in Figure 7. Transverse bolts 46 are used to connect the 1 sections 39 and 40 together with the projections 43 and 44 in the groove 34 and the clamp 26 thus held securely to the rack bar 25. The sections 39 and 40 are also provided with grooves on the facing sides thereof defining a passageway 50 for receiving the polish rod 27 therethrough below the rack bar 25, and each of the sections 39 and 40 are provided with clamping or set screws 51 and 52, which may be screw threaded in said sections and adapted for adjustment in a lockingrelation against the polish rod 27 at diametrically opposed sides thereof, as illustrated in Figure 6 of the drawings, and in this manner it is obvious that the clamp con- 6 struction 26 holds the rack bar 25 in an assembled relation upon the polish rod 27, in axial alignment thereabove.

In the frame construction for the preferred and modified forms of the invention preferably parallel base pieces 55 and 56, are bolted as at 57, in rigidly secured relation upon the platform 58 of the well, and to one side of the casing head 29. Legs 60 and 61 are connected at the outer sides on the ends of each of the base pieces 55 and 56, the same being preferably of angle iron. The legs 60 are preferably detachably bolted, as at 62, while the legs 61 are pivoted as at 63. On each of the base pieces 55 and 56 the legs 60 and 61 thereof extend upwardly in a relatively converging relation, and at their upper ends they are secured as by riveting, or in any other approved relationship to the upper ends of vertical standards 64, and 65 respectively, detachably bolted as at 66 to the base pieces 55 and 56. The vertical standards 64 and 65 are strong, and the same may be of plate or bar formation, or of channel formation, as desired. It is to be understood that the standards 64 and 65 are connected at the inner sides of the base pieces 55 and 56 respectively, and extend upwardly in spaced parallel relation.

At their upper ends the standards 64 and 65 are respectively provided with bearing segments 7 O and 71, having detachable bear ing caps 72 and 73 cooperating therewith in a complementary relation to provide spaced bearings for rotatably receiving a master gear wheel shaft 75. The shaft 75, as is well illustrated in Figure 3 of the drawings, at the ends thereof projects beyond the outer sides of the bearings at the tops of the stand ards 64 and 65, and at said outer ends is provided with detachable caps 76, held in place by detachable bolts or screws 77 in such relation that the shaft while free to rotate in the bearings is prevented from longitudinal movement in the standards 64 and 65, and prevents the latter from spreading at their upper ends.

The legs 61 are preferably rigidly braced by cross brace pieces 78 to their adjacent standards 64 and 65, as illustrated in Figures 2 and 3 of the drawings, it being the purpose in providing the braces 78 mainly to hold the standards 64 and 65 in a stable definite spaced relation with the legs 60 and 61 when the frame is swung upon its pivot pins 63 after detachment of the bolts 62 and 66 from the base pieces 55 and 56. Such pivoting relation of the frame is necessary under circumstances where the same should be removed from the vicinity of the polish red when raising or lowering the said polish rod for adding or detaching sections or repair thereof.

Referring now to the operating details of form A, carried by the frame for operating upon the rack bar 25, a preferably segmental shaped gear 80 is provided, preferably being a half circle, provided with a hub 81 rotatably disposed on the shaft as illustrated in Figure 3 of the drawings, adjacent the standard 65, the said hub having spokes 8 1 radiating therefrom and the segment of the gear having an arcuate series of teeth 86 thereon in meshing relation with the teeth 30 of the polish rod extension 25. A preferably ringshaped gear 87 is provided, having a hub bearing on the shaft 75 and being provided with spokes 88, about which clamps 89 are extended in a clamped relation on the spokes 8% of the segmental gear 80, to key the gears and 87 together so that they rotate in the same relation on the shaft 75. The pitch radius of the gear 87 is of course less than the pitch radius of the gear 80, as is obvious from Figure 2 of the drawings. The gear 87 may be conveniently referred to as the inter- 'mediategear, and in meshing relation therewith is a gear wheel 90, which may be of segmental shaped formation, larger in pitch radius than the gear wheel 87, the same having a hub portion 91 rotatably mounted. on a short shaft 92, supported between the stand ards 6st and 65, in a relation illustrated in Figures 3 and 4 of the drawings. The segmental gear is provided with spokes radiating from the hub 91, and the outer periphery of the segment of said gear is provided with teeth 94 in a meshing relation with the teeth of the gear wheel 87, as is apparent from-the drawings. The gear 90 need not comprise an entire circle, since it is intended that the same shall oscillate on the shaft 92, in order to move the intermediate gear wheel 87, and thence the gear segment 80 in order to reciprocate the polish rod. The segmental pull gear 90 is provided with an opening 97 in one end thereof to which the power line or cable 98 is connected, to provide an under pull arrangement for the gear 90.

An important feature of the invention consists in the fact that by varying the size of the gears 87 and 90, the stroke of the polish rod may be lengthened or shortened. independent of variation in the length of stroke of the pull cable 98. To this end the shaft.

92 is supported in adjustable bearings 100 and 101, of plate-like formation, provided with central sockets 102 in which the said ends of the shaft rotatably bear. The plates 100 and 101 are of rectangular formation, fitting flat against the standards 64: and 65, and having transverse openings 105 therein for detachably receiving bolts 106. Each of the standards 64 and 65 is provided with a vertical series of openings 107 therealong, adjacent the opposite marginal edges thereof, with which the openings 105 are adapted to align to receive the bolts 106. It is thus apparent that the bearing plates 100 and 101 may be vertically adjusted longitudinally of the standards 64 and 65, in order to accommodate gears 87 and 90 which will give the length of-stroke of the polish rod desired for a pumping operation.

In'order to :maintain the polish rodeXtension 25 in a definite gear meshing relation with the gear of the operating unit, the frame legs 60 are preferably provided with bracket arms 110 detachably bolted as at 11-1 to :the legs 60, said bracket arms 110-extending at opposite sides of the gear segment 80, andat opposite sides of the polish rod extension rack 25, as illustrated in Figure ll of thedrawings. A substantially U-shaped guide frame is bolted detachably as at 116 between the bracket arms 1 10, the said U-shaped frame 115 having a pocket or groove 11 7 which re ceives the back portion ofthe toothedrack or bar 25 therein at the mar inal )ortion there-- of opposite the teeth 30. Between the edge 120 of the toothed bar 25, and the bottom of the groove 117 is disposed an antifriction device which may be adjustably positioned to engage and stabilizethe movement of the rack bar 25 during its reciprocation. This antifriction device 121 preferably comprises a U- shaped frame 122 with-the groove thereof-facing the edge 120 of the bar 25; the-channel frame 122 rotatably supporting therein in spaced relation a series of rotatable rollers 127, which bear such a relation between :the edge 120 and the bar 25 that theywill-engage the edge 120 and space-the channel frame [122 therefrom, as illustrated in Figure 9. Adjustable screws'o'r members are carried by the U-shaped guide frame 115, for adjustment'against the channel 120 of t'he antifriction device 121 to urge the rollers127 of the latter against the edge of the bar opposite'the gear teetlrthereon; In order to retain the anti'friction device 121m place in the U-shapedguide frame 115 it is preferred to provide detachable top and bottom plates and 136 respectively connected on the top and bottom of the 'U-shaped guide frame 115, to close the ends of the groove 1 17 and prevent the anti-friction device 121 from movement out of the channelframe except'by detachment of one of said plates or the removal of the entire guide device away from the rack bar 25.

It is well to note at this point that the bracket arms 110 may be detached from the legs 60, entirely, and this permits the frame to swing on the pivots 63 away from the rack bar 25, after the bolts 62and66 are released.

Referring to the modified form of invention 13, the rack bar and frame details of the operating mechanism are the same as lescribed for the preferred form of invention A. However, the shaft 75 rotatably supports thereon a substantially three-quarter ring segment 130, from the hub-131 of which radiates the spokes 132 in-any approved relation. ()n the outer periphery of the segment 130 are provided teeth 133 for meshing-engagement withthe teeth of the rackba-r 25.

On the shaft 7 5 at opposite sides of the gear wheel or segment 130 are provided grooved cableconnecting wheels 135 and 136; it being preferred that said wheels have a web portion 136 provided with apertures through which U-bolts 137 may be extended for detachably clamping said grooved wheels 135 and 136 to the spoke 132 of the gear segment 130, as illustrated in Figures 12 and 13. The Wheels 135 and 136 are of the same size, and peripherally provided with an enlarged rim having a circumferential groove therein wherein a pull line or cable 138 may be received. The pull line 138 may of course have a predetermined length of stroke, or a variable length of stroke, as desired. It is connected intermediate its ends about any of the spokes 132, as shown at 140 in Figure 13 of the drawings, and the cable 138 is then wound upwardly within the grooves of and about the wheels 135 and 136, so that the cable takes off on a tangent. It is of course apparent that the degree of oscillation of the segmental gear 130 may be regulated by doubling the cable 140 about any of the spokes 132, as will be readily apparent to anyone skilled in the art to which this invention relates.

Referring to the form of invention C, the same is simpler than the constructions A or B, embodying merely a segmental gear 145, although the same may be a full circled gear. It is provided with an enlarged hub 146 rotatable on the shaft 92, as illustrated in the drawings. The segment rim 146 is connected by means of spokes 147 to the hub 146, and the rim of the segment is provided with teeth 148 thereon in meshing relation with the teeth of the rack bar 25, as illustrated in Figures 14 and 17 of the drawings. The pull line 149 is connected directly with the segment 145; the said segment at opposite ends thereof being provided with upper and lower openings 150 and 151 respectively, with which a pull line 149 may be connected. In case the pull line 149 is connected with the opening 150, the segment is adapted for an overpull action, in contradistinction to the under pull action of the line 149, when connected in the opening 151 as illustrated in Figure 14.

Referring to the form of invention D as illustrated in Figure 18 and 19, the same may be conveniently referred to as a sprocket chain type of operating unit. The shaft is provided adjacent the standard 65 with a gear 160, preferably of segmental formation, having a hub 161 and spokes 162 radiating therefrom and supporting the rim 163 which has teeth 164 thereon in meshing relation with the teeth of the rack 25, as illus trated in Fig. 18. On the shaft 7 5 is a small sprocket wheel 170, the spokes of which are clamped with the spokes 162 of the gear 160 by means of U-bolts 171, so that the sprocket wheel 170 is connected with the segment 164 in rotation therewith upon the shaft 75. For the form of invention D the shaft 92 is used,"of entirely similar construction and mounting as the shaft 75 of the form of invention A; the said shaft 92 having the ends thereof bearing in adjustable plates 100 and 101, which are bolted as at 106 onto the standards 64 and 65, in any of the side series of openings 107 provided on said standards. Rotatable on the shaft 92 is a sprocket wheel 180, larger than the sprocket wheel 170, and keyed with the said sprocket wheel 170 by means of a sprocket chain 181. A preferably under pull cable 183 is connected as at 184 eccentric on the sprocket wheel 180, and the purpose of which is apparent from Figure 18 of the drawings.

From the foregoin description of this invention it is apparent that novel pump or polish rod operating mechanism has been provided, by means of which a rectilinear movement upon the polish rod is attained by means of a simple and compact apparatus which may with facility be removed for operation upon the polish rod independent of pumping action.

Various changes in the shape, size, and arrangement of parts may be made to the forms of invention therein shown and described, without departing from the spirit of the same or the scope of the claims.

I claim:

1. In a pumping ack the combination of a supporting frame, a gear rot-atably support ed from the pumping frame, means associated with said gear for connection with a polish rod, a second gear keyed for movement with the first mentioned gear, a third gear on the frame in meshing relation with the second gear, and a pull line connected with said third gear, said third gear having a mounting on the frame which may be adjusted towards or away from the second gear to substitute various sizes of gears by means of which to adjust the length of stroke of a polish rod.

2. In a pumping jack the combination of a rack bear, a frame, a gear rotatable on the frame in meshing relation with the rack bar, a second gear keyed with the first mentioned gear for rotation therewith, the second gear being smaller than the first mentioned gear, a shaftadjustable on the frame towards or away from the axis of rotation of said first and second mentioned gears, and a third gear detachably mounted on said shaft adapted to mesh with the second gear.

3. In a pumping jack the combination of a rack bar, a frame, a gear rotatable on the frame in meshing relation with the rack bar, a second gear keyed with the first mentioned gear for rotation therewith, the second gear being smaller than the first mentioned gear, a shaft adjustable on the frame towards or away from the axis of rotation of said first and second mentioned gears, a third gear detachably mounted on said' shaft adapted to mesh with the second gear, and guide means detachably carried by said frame for guiding the rack bar into a rectilinear movement.

4. In a pumping jack the combination of a supporting frame, a gear rotatably supported upon the pumping frame, means associated with said gear for connection with apolish rod, to operate the latter, an intermediate gear detachably keyed for movement witn the first mentioned gear, a third gear, means mounting the third gear on the frame on an aXis which may be adjusted towards or away from the axis of rotation of the first mentioned gear, said intermediate gear and third gear having means associated therewith establishing a driving connection therebetween.

5. In a pumping jack the combination of a base, an inverted V-shaped frame comprising a pair of downwardly divergent legs, means pivoting one of the legs at its lower end to the base, means detachably connecting the other leg at its lower end to the base, a polish rod operating gear rotatable at the upper ends of said legs, and a bracket carried by one of said legs below the axis of rotation of said gear for slidably guiding the movement of the polish rod as the gear cooperates in an operating relation on the polish rod.

6. In a pumping ack the combination of a base, an inverted V-shaped frame comprising 'a pair of downwardly divergent legs each inclined to the vertical, means pivoting one of the legs at its lower end to the base, means detachably connecting the other leg at its lower end to the base, a polish rod operating gear rotatable at the upper ends of said legs, a substantially vertical standard detachably connected at its lower end to the base between the leg connections on said base and at its upper end aiding in the rotatable support of said gear.

7. In combination with a polish rod, a pumping jack comprising a pivoted frame having an upper end which may be moved by pivoting of the frame towards or away from the polish rod, a rack connected with the polish rod for movement therewith, a gear rotatable on the frame remote from its pivot for intermeshing with the rack and to operate the polish rod upon movement of the gear about its axis, means to hold the frame stationary, and a guide carried by the frame having a detachable connection with the rack at the diametrically opposite side of the rack from the mesh of the gear therewith, the guide being detachable at its connection with the rack to permit the frame to swing away from the rack to accomplish predetermined operations.

8. In combination with a polish rod, a base structure, a pair of inverted V-shaped frame pieces each comprising relatively divergent legs, the similar legs of the frame pieces remote from the polish rod having aligning pivotal connections upon the base structure, means detachably connecting the lower ends of the other legs of the frame pieces to the base structure, other means having detachaf HENRY M. JARVIS.

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