US1462721A - Pump-plunger rotor - Google Patents

Description

July 24, 1923.4

S. B. sARGl-:N'r

PUMP PLUNGER KOTOR.

Filed April 14, 2 Sheets-Sheet l SUMA/5P B.

JKM- 47 TQQ/VE Y5.

s. B. sARGEN'r PUMP PLUNGER ROTOR July 24, '1923.-'

Filed April 14 1922 2 Sheets-Sheet 2 T, m M 5 m W 5 lli Patented July' 24, i923.

unrTn sTnTas Sm B. SENT, DE* LUS ANGELES,

remar-rapire@ leeren.

application and anni 1a, ieee. seran no. scarso.

To all whom it may concern."

Be it known that l, SUMNER B. SARGENT, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California have invented a new 'and useful Pump-Flunger Rotor, of which the followin is a speciiication.

This 'invention re ates to pumping e uipment for oil wells, and relates particu arly to means for preserving an equal wear upon the pump barrel, the pump plunger, and the reciprocati parts of oil pumping equipment, as we 1 as overcoming diiiiculties arising from sucker rods becoming disconnected and the sanding up of the Working parte of the pump. I

It is common practice in pumpmg oil fromiwells, to employ a closely fitting cylindrical steel plunger which reciprocates in a steel barrel. ln these pumps a preponderance of wear enerally occurs upon one slde of the barre thus, causing an elongated cross-section to result instead of preserving atrue circular cross-section by an equal distribution of wear'over the entire surfaces of thebarrel and the plunger. llt will be seen that the confinement of the wear to any certain portion of the barrel soon creates a space between the barrel and the plunger through which a leakage of oil ma occur, and it will be further seen that suc a oondition impairs the eiiiciency oir the pump 1n a much shorter time than if the wear were equally distributed. Also, when it 1s desired to re-establish the efficiency of the pump, the barrel and the plunger must be lifted from the well and a new liner inserted in the barrel. The removal of a pump barrel entails aconsiderable expenditure in both labor and expense, and also the loss of I production while the pump is out of operv ation.

Another diculty arising in the pumping of oil from wells is that sucker rods become unscrewed, this generally occurring at some point in the 'well between the surface and the pum and necessitating fishing for the of the line of sucker rods and same to the surface in order that with an oversize plunger without the necesslty of removing the barrel trom the well. itis also an object of my invention to provide a means whereby a rotative forte oit the pump by replacing the worn plunger Referring to the drawing which is tor il- 4 lustrative purposes only:

Fig. l is a somewhat diagrammatic. gmentary elevation showing an oil well pump equipped with my device.

Fig. 2 is a sectional view taken on a plane represented by the line 2-2 of Fi 1.

Fig. 3 is a vertical section throu Fig. '2.

Fig. 4 is a fragmentary view s owing a rotation regulating device sometimes desirable of employment upon the device shown in the preceding figures.

Fig. 5 is a plan View similar to Fig. 2., showing a form of my invention adapted to rotate the sucker rods and the plunger during both the up and the down strokes thereof.

Fig. 6 is a vertical section through Fig. 5.

Fig. 7 erating link which may be used in the practice of my invention.

Fig. 8 is a view showing a pressure rel leased vdevice which it may be desirableto use with a parallel link for reciprocating the bell crank.

ln Fig. 1 of thedrawing a line'o tubingY 11 is shown, having a pump barrel 12 attached to its lower end. Within the pump barrel 12 a plunger 13 is adapted to be vertically reciprocated by a line ofsuckerrods 14. which vare connected through-a polished rod 15 and a stirrup 18 with a reciprocating element such as the walking beam 19. As shown in Figures 2 and 3, the lower ends y. 20 of the stirrup 18 support the yoke `21 -which in turn supports the rotating mechanism 22.

The yoke 21 hasa central enlargement 2t surmounted by a projection 25 havin the formation of a horizontal disk, ang the polish rod 15 is extended through a hole 26 is a view showing a resilient opliti@ lll@ lll:

provided therefor through the yoke 21 and the projection 25. A head 28 1s clamped upon the polished rod 15 above the yoke 21 and serves to transfer the weightof the lme of sucker rods and the plunger to the projection u on which it rests.

Surroundlng the lower portion ot the head 28, a driving plate 30 which is circular 1n shape, rests upon the top surface of the p rojeetion 25, and has upwardly projecting therefrom a circular flange 31 which 1s 1nteriorly formed to receive the hexagonal lower end 32 ot the head 28. Adjacent to both the top and bottom faces of the plate 30 l place liber rings 33 which are clamped thereagainst by a rachet wheel 35 and ha plate 36 which is of slightly reater d1- ameter than the ratchet whee and has mounted thereupon a driving ring 37. The ratchet wheel 35 and the plate 36 are compressed together with a pressure of suiticient intensity'to give the desired driving Jfunction between the members 35 and 36 and the plate 30 by springs 38 compressed by bolts ai.

A bell crank 39 is mounted upon one end of the yoke 21, this bell crank havin a lateral arm 40 and a vertical arm 41. e arm 40 ot the bell crank is maintained in a position substantially Iparallel to the walking beamv 19 by a para lel link 43, as shown Vin Fig. 1, while the arm 41 thereof engages, as illustrated in Fig. 7, a recess 44 provided in the periphery of the driving ring 37. From f Fig. 1 it will be perceived that as the walking beam reciprocates the pumping apparatus connected thereto, the arm 40 of the bell crank 39 will be partially rotated back and forth between the positions indicated by the dotted lines 45 and 46. This reciprocative movement is transferred through the arm 41 to the ring 37 and rovides a means for rotating the ratchet Wheel 35 by means of a spring retained pawl 48 which engages the teeth 49 of the ratchet wheel whenever the ring 37 is reciprocatively rotated in the direction indicated by the arrow 5() in Fig. 2. I also provide a stop pawl 51 for preventing the counter rotation of the ratchet wheel. This pawl 51 is mounted upon a member 52 rigidly secured upon the oke 21, and is maintained against the teet 49 of the ratchet wheel by a sprin 53.

The frictional drive provi ed between the ratchet wheel 35 and the drivin plate 30 provides for the movement of t e 'ratchet wheel independently of the driving plate 30 when the force required to rotate the plunger 13 exceeds a predetermined amount, thus preventing injur to the equipment. An additional precaution against injury to the equipment when the plunger becomes sanded in the barrel is provided in the novel arrangeme" t of parts Ywhich permits the yoke and t e driving mechanism sustained Laea'zal thereof. A bracket 55 is clamped upon the left arm 56 of the stirrup 18. This bracket 55 is provided with a slot 57 having a pin 58 therein which extends downwardly from the bracket to a position adjacent to the inner face 59 of the pawl 48. When the ring 37 reciprocates backward in the direction of the arrow 60, the pawl is lifted trom encragement with the teeth 49 by lthe pin 58. Tlpon the forward stroke, as indicated by the arrow 61, the pawl cannot engage the teeth until a certain point in the rotation of the ring is reached; thus it is possible to adjust the pin 58 within the slot 57 to provide the engagement of a certain predetermined number of teeth at each reciprocation of the ring 37. The pin 58 may be clamped within the slot by any suitable means.

It is 'desirable in some installations to provide for the rotation of the plunger during both the upward and downward strokes thereof. This is accomplished as shown in Figures 5 and 6, by placing a second drive ring 64 upon the'drive ring v37, this ring 64 being provided with a projecting portion 65 havin a recess 61 engaged by the vertical arm 6 of a bell crank 68, which is mounted upon the end of the yoke 21 opposite to the bell crank 39. A spring retained pawl 69 is adapted to rotate the ratchet wheel 35 in the same direction as it is rotated by the pawl 48.

As hereinbefore explained it is evident from Fig. 1 that the arms 40 and 71 of the bell cranks are rotated upwardly through a partial revolution during the down stroke, and -downwardly durin the up-stroke. When the arm 40 is rais during the downwardstroke, the ring 37 is reciprocated in the direction of the arrow 75, the pawl 48 coming into engagement with the teeth 49, and the ratchet wheel thereupon being rotated in a clockwise direction. During the upward stroke, the lateral arms of the bell cranks are revolvedI downwardly, causing the movement of the rin 37 in a direction opposite to that indicate by the arrow 75, while the ring 64 is reciprocated in the direction of the arrow 76 causing the engagement of the awl 69 with teeth 49, and the rotation o the ratchet wheel in a clockwise direction again results; this latter rotation being during the upward stroke while the former rotation was accomplished during the downward stroke.

Inl Fig. 7 I illustrate an alternative means whereby the/plunger may not rotate when encarar the frictional resistance between the plunger and the barrel exceeds a certain point. 1nstead of the rigid link 43 as shown in F ig. 1, a resilient link 78 is connected between the walking beam 19 and the arm 40 of the bell crank 39. A-simple and ecient construction of the resilient link 78 consists ot' a frame composed of plates 79 and 80 having parallel slide rods 81 extending therebetween; a rod 82 extending from the plate 79 and. having connection with the arm 40 of the bell crank; a cross head 85 adapted to slide on .the rods 81, having a rod 86 extending upwardly theretrom passin through a hole 87 provided in plate 80 an makin connection with a pin 88 mounted upon die walking beam 19; and a spring 90 compressed between the plate 80 and the cross head 85, this spring holding the crosshead forcibly against the plate 79, but permitting the link 78 to be extended when a resistance is exerted thereupon through the bell crank.

The movement of the bell crank 39 may be varied to provide di'erent rates of feed of the ratchet plate by moving the pin 88 upon the walking beam 19, either to the right orlleft in the direction of the indication 92, to change the action of the parallel link.

In F ig. 8 of the drawing I show a releasable device adapted to be incorporated in the parallel link 43 so that when a resistance against rotation due to sanding up of the plunger within the pump barrel is created,the parallel link arrangement will become inoperative so that no further relative stress willbe applied to the sucker rod until the condition causing the resistance is overcome and the device replaced in operative condition. When this device is used, the parallel link is provided in two lengths and 101; the length 100 connecting between the walking beam 19 and the pivot 102 in the upper end of a plate 103 which has another plate 104 pivoted at 105 to its lower end; and the member 101 being connected between the bell crank and a pivot' 108 in the upper end of the plate 104. A grooved block is mounted upon the plate 103 and a spring member 111, extending from the upper end of the member 104 as shown, engages the grooved block 110 and maintains the plate 104 normally in a position against the plate 103.

It will be perceived that ivot 105 and pivot 108 are not in direct a ignment, thus -a tendency of plate 104 to swing outwardly as indicated by arrow 112 is created. Under ordinary working conditions, the spring 111 is of sufcient strength to resist the outward swing of plate 104 due to the rotative movement created by the tensile force acting in the parallel link during the upstroke thereof. When a condition arises causing a resistance against rotation ot the polished rod and the members suspended therefrom, the increased rotative movement of the plate 104 upon pivot 105, due to the increased tension in the parallel link members, overcomes the engagement of spring 111 with the grooved block 110 and allows the plate 104 to swing outwardly into the released position indicatedby the dotted lines 115. After the release of plate 104, the link arrangement is inoperative as the direct line arrangement necessary for the transfer of the movement of the walking beam to the bell'crank is destroyed.

ll claim as my invention:

l. In a device of the class described, the combination of: a polished rod; a walking beam; a stirrup connecting said walking beam with said polished rod; a ratchet wheel lfrictionally mounted on said polished rod; pawl means to actuate said ratchet wheel and thereby rotate said polished rod; and means whereby said ratchet wheel may move downward independently ot said polished rod.

2. lln a device of the class described., the combination of: a polished rod; a walking beam; a stirrup connecting said walking beam with said polished rod; a ratchet wheel mounted on said polished rod; pawl means to actuate said ratchet wheel and thereby rotate said polished rod'; and means whereby said ratchet wheel may move downward independently of said polished rod.

l3. ln a device of the class described, the combination of: a polished rod, a yoke slidably retained upon said polished rod; means for vertically reciprocating said yoke; a

plate rotatably supported upon said yoke;

means for rotating said plate; and means rigidly mounted upon said polished rod adapted to be lifted by said yoke and to engage said plate, said rigidly mounted means being disengageable from said plate so that said yoke and said rotatable elements supportedy thereby may move downward in dependently of said polished rod.

4. ln a device of the class described, the combination of: a polished rod; a member slidably retained upon said polished rod; means for vertically reciprocating said slidable member; rotatable means supported by said slidable member; and a head rigidly mounted upon said polished rod adapted to be lifted by said slidable member and to engage said rotatable means, said head being disengageable from said rotatable means so that said rotatable means and said slidable means may move downward independently of said polished rod.

5. ln a device of the class described, the combination of: a polished rod; a member slidably retained upon said polished rod; means for vertically reciprocating said slidable member; rotatable means supported by said slidable member; means whereby said rotatable means may rotate said polished rod; and means acting between said slidable' member and said polished rod whereby said slidable member may litt said polished rod, said slidable member being adapted to move downward independently of said polished rod.

6. ln a device of the class described, the combination of: a polished rod; a ratchet plate frictionally mounted upon said polished rod; a pawl for actuating said ratchet plate; means for reciprocating said pawl; and means for controlling the envagexnent of said pawl with the teeth ot said ratchet wheel.

7. In a device of the class described, the combination of: a polished rod; a yoke slidably retained upon said polished rod; a-plate member supported upon Said yoke; a ratchet .Wheel adapted to rotate said plate member;

a ring rotatably mounted upon said plate member; a pawl upon said ring adapted to rotate said ratchet wheel; means connecting between said polished rod and said plate member where y said polished rod may be rotated by said plate member; and means for rotatably reciprocating said ring.

8. ln a device of the class described, the combination of: a polished rod; a yoke slidably retained upon said polished rod; a plate member su ported upon said yoke; a ratchet wheel frictlonally engaging said plate member; a ring rotatably mounted upon said plate member; a pawl upon said ring adapted to rotate said ratchet wheel; means connecting between said polished rod and said plate member whereby said polished rod may be rotated by said plate member; and means for rotatably reciprocating said ring.

9. ln a device of the class described, the combination of: a polished rod; a yoke slidably retained upon said polished rod; a plate member su ported upon said yoke; a ratchet wheel iliictionally engaging said plate member; a ring rotatably mounted upon said plate member; a pawl upon said ring adapted to rotate said ratchet wheel;

racer/ai means connecting between said polished rod and said plate member whereby said polished rod may be rotated by said plate member; and crank means for rotatably reciproeating said rin 10. ln a device ot the class described; the

combination ot: a polished rod; a yoke slid-l ably retained upon said polished rod; a plate member supported upon said yoke; a ratchet wheel frictionally en aging said plate member; a ring rotatab mounted upon said plate member; a pawlyupon said ring adapted to rotate said ratchet wheel; means com necting between said polished rod and said plate member whereby said polished rod may be rotated by 'said plate member; crank means for rotatably reciprocating said ring; and means for controllin the period ot engagement ot said pawl with said ratchet.

11. In a device of the class described the combination of a polished rod; a head mounted upon said polished rod; yoke means supporting said head; reci rocative mecha nism lor rotating said hea a crank for reciprocating said mechanism; link members connecting between said yoke means anda vertically rotatably reciprocating arm; and a releasably constituted parallel link connecting between said crank and said arm.

12. lln a device of the class described, the combination of: a polished rod; a head mounted upon said polished rod; yoke means supporting said head; reciprocative mechanism for rotating said head; a crank tor reciprocating said mechanism; link members connecting between said yoke means and a vertically 4rotatably reciprocating arm; a parallel link connecting between said crank and said arm., said link containing releasing means adapted to render said link inoperative when resistance ol rotated members against rotation exceeds a predetermined value.

ln testimony whereof, l have hereunto set my hand at Los Angeles, California, this 6th day ol April 1922.

SUMNER B. SARGENT.

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