US1673223A - Polished rod rotor - Google Patents

Description

June 12, 1928.

1,673,223 A. BOYNTON POLI SHED ROD ROTOR Filed June 29, 1926 :5 Sheets-Sheet 11 gwuenloz .Bonv'mw, 25 I June 12. 1928.

. 1,673,223 A. BOYNTON POLI SHED ROD ROTOR Filed June 29, 1926 3 Sheets-Sheet 2 N1 A Q i g ammq June 12. 1928.

A. BOYNTON POLISHED ROD ROTOR Filed June 29, 1926 3 Sheets-Sheet unlllH qilllll' llllll I lllllllllll l||lllllllluuluunnuu til Patented June 12, 1928.

UNITED STATES ALEXANDER BOYNTON, or SAN ANTONIO, rnxAs.

1 ronrsmin non Boron.

Application filed June 29,1926. Serial No. 119,507.

This invention relates to polished frod rotors especially adapted for use inconnection with pumping wells.

The invention forming the subject matter of this application contemplates the provision of economical and reliable means for intermittently rotating the polished-rod and the reciprocating mechanism connected thereto to exert an intermittenttightening effect on the rods at the joi'nts thereof and to avoid the formation of squirt grooves in the working barrel and the cups or plunger, as

j the case may be, which squirt grooves seriously cut down production and emulsify the oil. a i

A further and equally important objectis to provide a polished rod rotor embodying novel means by which twisting of the rods to the breaking point as a result of sticking of the cups or plunger is prevented, this feature of the invention being adapted to render the rotor temporarily inoperative when the back strain in the rods as a result ofthe sticking of the cups or plunger exceeds a predetermined point. 7 4

Another aim is to'provide a rotor which may be quickly applied to the beam of a pumping jack without the exercise of unusual skill and without substantially altering the construction of the parts alreadyin. use, both of these features making the invention more acceptable to the trade. e

Other objects and advantages will be apparent duringthe course of the following description. I

In the accompanying drawings forming a part of this application and in which .like numerals are employed. to designate like parts throughout the same:

Figure 1 is a perspective of the improved rotor applied; v

Figure 2 is a detail sectional view through a portion of the motion transmitting mechanism;

Figure 3 is a verticaltransverse sectional View taken online 33 of Figure 2;

Figure 4 is a fragmentary front elevation of the rotor applied;

Figure 5 is a fragmentary side view of the rotor applied;

Figure 6 is a fragmentary front elevation illustrating a slight modification of the invention;

Figure taken on line 7 7 of Figure 6.. In the drawings, the numeral 5 designates '7 is a horizontal sectional view the beam of an Oklahoma pumping jack, which beam is, as shown in Figure 1, formed principally from a pair ofchannel beams having their flanges directed outwardly. Figure 1 further shows the invention is provided with a special trunnion 6 to receive the polished rod 7, thelateral branches of the trunnion being provided with grooved enlargements 8 at the ends thereof for engagement by the eyes of eye-bolts 9.' The 'eyebolts 9 are threaded into the upperterminal portions of the sides of a U-shaped stirrup connection between the bolts 9 and the sides of the stirrup 1O permits adjustment of the stirrup. with respect to the bolts 9 and other parts of the rotor.

The stirrup 10 constitutes a support fora power transmit-ting unit or member in the naturepf a beveled gear .12, the hub 14 of which is extended a substantial distance below thegear and seats in a rather shallow recess 15 in the bight portion of the stirrup.

Suitable fastening devices such as set screws 16 may be employed to firmly lock the hub 14 to the polished rod so that when the hub 14 is turned by a means to be describedthe polished rod will also be'turned. The recess 15 is adapted toreceive a suitable lubricant to reduce friction between the lower end of the hub and the adjacent portion of the stirrup to a minimum One of the most important features of the invention resides in the particular connection between the hub of the beveled gear 12 and the bottom wall ofthe recess 15 since these two parts constitute what might be said to 10 whereby the stirrup is suspended beneath the beam in such a manner that the centrally arranged opening in the bight portion there of receives the polished rod. The threaded .be a frictional holding means contributing I 6 to the beam. "Now; during the normal op- I eration of the rotor, during which period the cups or plunger,- as'the case may be, are free to turn under the influence of the rotor and the friction between the lower end ofthehub it and the bottom wall of the will be return stroke preparatory to again. turning the rotorin a clockwise direction the back twist in the rods willfcause the hub 14 to turn in a counter-clockwise direction. In other words, whenthe back strain inthe rods exceeds a predeterminedpoint or in fact approaches the breaking point, it willbe sufficient to overcome the friction between the hub '14. and the stirrup as a result of the weight of the sucker-mods, etc, and will cause the hub-to movein a counter-clockwise direction' since there isinothingv of consequence toresist this movement. W I

Attention isnow invited. to Figures 2 and t which illustrate that the beveled; gear 12 is in constantmeshwith the pinion 24f0rme1 on one endof or attached. to a hollow shaft 26; The hollow shaft 26 is shown; in these Figures as being provided with an, annular series of ratchet teeth 27 adapted to be engaged by the ratchet teeth: of a motion transmitting ratchet and sprocket wheel or element 28. The wheel 28 isrotatabl'y mounted. onthe shaft 26 and the ratchet teeth of thesame areturged into/engagement with the ratchet teeth 27 by a coil: spring'29. The coil spring 29 which is mountedon; the shaft26 is confined between the hub ofthe wheel 28 and? the attachingportion .30 of a protecting shell 31.. Figure 2 clearly illus-' trates thatthe shell 31-. is threaded 'on the shaft26, thereby making it possible tjo-vary a counterclockwise direction the ratchet teeth of the-samewillhave driving engagementwith the ratchet teeth 27: so that the shaft 26 and the beveled gear 2 lfat one'end However, when the combinationwheel 28'is tur-nedin a clockwise direction by a means to be described 7 i the ratchet teeth of the same will ride back on the ratchet teeth .27\ so that-,no motion whatever will be imparted tothe. shaft. 26 from this source. It is believed tobe-obvi ous that during; the return of. the; combination wheel to anew driving: position, the spring 29 will be contracted. ;Each time, thecombination wheelrides over the ratchet teeth 27: the wheel 28 will be moved back to anposition partly within thcshe1l3-1 ,sothat. if

any ice or; the like should happentoaccumulate between-the combination wheel and the shell it will'b e; scrapedoff; during the backing up and lateral movement of the combination wheel. Figure 2 shows,- this to be true..

Further reference to: Figure 2 I will clearly show that the shaft 26 is hollow-- for the reception of a lubricantwhich'may be sup vided for the-movement of the lubricant fromthe. interior of the shaft to the areas to be lubricated. ;Referrin'ginow to Figure 4 it will be seen that-the shaft. is confined between. the upper and lower sections of a more or less UT-shaped yoke-35, the sections of the yoke being provided at their meeting portions with lateral cars which may be connected by cap screws 36 or other suitable fastening devices. The

meeting portions. of the sections of the yoke may be formed with semi-circular recesses which cooperatein the formationof bearings for the terminals of .the shaft 26, as clearly illustrated in Figure '2; The bearings for the reception of the terminals of the shaft 26 may be lined with an. antiefriction metal or they may be merely machinechdepending onthe mechanical perfection desired and the use or abuse to which the; device might be subjected. L V

Figure. 5 clearly illustrates that the yoke 35;. is received in. asl'ot 37 in one of. the

verticalsidesof the stirrupQIO so. that the yoke is braced and held. against movement. This figure also: illustrates-that the shell 31 is received in the enlarged, intermediate portion of thej slot 37 so "that'lost motion; of the shaft- 26,and thezpinion 24;: is avoidedl. The

inner portions of the sections of the yoke 35,;are provided withbearings lO which receivethe reduced terminals of. the hub 14. Of course, it. necessary. to placev the hub 14:} between the bearings 40 preparatory to the connection ofthe sections of the yoke 35.; otherwise the hub 14. could not be connected toythe yoke. I v

The sprocket teeth of" the combination wheel are engaged: by thejntermediate portion of a sprocketchain 41, the ends. of which aretrained aboutv adjust-able sprocket wheels 4-2. Suitable" guards l3,- preferably ofrsegmental formation,. are extended about a portion of the chainat, the sprocket wheelsl2i and. are mounted upon the same attaching bolts ll as are the. sprocket wheels 42. Figure 5 clearly illustrates that tlieattaching, bolts 44-. are extended through the slots 47 in an'Yattachingv arm. 48. The. attaching, arm! is, turn connected to the beam by a bracket 50'.

Itisbelievedito be obvious fronran inpolished rod, .thesucker rods, and the cups or plunger, as the case may be, It is im Ion Ill)

portant to observe that the extent to which the combinationwheelQS is rocked may be controlled by an adjustment of the sprocket wheel attaching bolts 44: in the slots 47. Of course, when the sprocket wheels 42 have been properly adjusted to bring about the desired rocking of the combination wheel 28, the bolts le are securely tightened so that the sprocket wheels42 will be positively held against turning or bodily movement. Slack in the chain ll may be taken up by turning one or bot-lief the sprocket wheels 42 in the proper direction and then tightening the same.

lVith reference to the foregoing description it will be seen that rocking of the beam on the down stroke will result in the turning of the combination wheel in a counterclockwise direction, which turning of the combination wheel will result in theturning of the beveled gear 12 and consequently the polished rod, the sucker rods, and the cups in a' clockwise direction whereby the formation of squirt groovesor jets is avoid- This also brings about an intermittent tightening effect on the rods at the joints thereof so that parting of the joints is overcome." Y

Particular attention is invited to the fact that the intermittent turning of the rods is accomplished on the down strokes of the movable equipment, during which strokes the weight of the column of fluid is not upon the rods, but, as is well known in the art, is upon the standing valve or valves. On the up stroke of the rods the friction is substantially greater due to the weight of the column of fluid thereon and it is not near so easy to turn the rods.

In the form of invention illustrated in Figures 6 and 7, the bearings 40 of the sec tions of the yoke 35 are provided with apertured extensions or cars 60 arranged in line for the reception of a bolt 61 which cooperates with the fastening devices 63 at the outer end of the yoke to hold the sections of the yoke together. It will be seen by reference to Figure 6 that the inner contact points 64 which cooperate in the formation of the inner bearing for the shaft 26 are not connected by cap screws, or the like, but at thispoint a mere jam fit is employed.

Having thus described the invention, what is claimed is:

1. A polished rod rotor comprising an attaching member, a power transmitting unit mounted on the attaching member and having means whereby the same may be securely locked to a polished rod, a shaft having means engaged with-said power transmitting unit and having teeth, a motion transmitting wheel having teeth adapted to engage said first-named teeth, spring means urging the teeth of said motion transmitting wheel into engagement with said first-named teeth, and adriving-member connected to said motion transmitting wheel.

2. A polished rod rotor comprising an "at taching member, a power transmitting unit having means whereby the same may be securely locked to a polished rod, a shaft having means engaged with said power transmitting LlIllt and havlng ratchet teeth, a motion transm tting wheelhaving ratchet teeth adapted to engage said first-named ratchet teeth, means urging the ratchet teeth of said motion transmitting wheelinto engagement with said first-namedratchet teeth, a driving memberconnected to said combination 'wheel," and ;a yoke supporting said shaft.

A polished rod rotor comprising a power transmittingunit having means whereby the same may be securely locked to a 'polished'ro'd, a shaft having means engaged with said power transmitting unit-and having ratchet teeth, a power transmitting wheel having ratchet teeth, spring 'me'ans urgingthe ratchet teeth of said power transmitting wheel into'engagem'ent with said.v

first-named ratchet teeth,' a'nd"ayoke slip porting said shaft and having means receiving the terminals of said power transmitting unit.

4. A polished rod rotor comprising anatt-aching member, a power transmitting unit mounted on the attaching member and having means whereby the same may be securely locked to a polished rod, a shaft having nection with said power transmitting unitand being provided with ratchet teeth, a

motion transmitting wheel rotatably mounted on said shaft and having ratchet teeth engaged with said first named ratchet teeth, a driving chain havingeonnection intermediate the ends thereof with said motion transmitting wheel, and anchoring devices at the ends of said chain.

6. A polished rod rotor comprising a power transmitting unit having means whereby the same may be attached to a polished rod, a shaft having connection with said power transmitting unit and being provided with teeth, a motion transmitting wheel mounted on said shaft and having teethengaged with said first-named teeth,

power transmitting I wherebythe same may be attached to aa springnrging said first'and second-named ratchet teeth: intoconstant engagement, a driving chainqhavln-g connection with said combination: wheel, anchoring devices at the ends of said chain, and an arm having means ad ustabl'y supporting said anchoring devices 1 v i 7. A, polished rod iroto'r comprising a power -transmitting unit having means whereby thefsame Vmay be attached to a polished rod, ashaft having connection with said power transmitting; unit and beingpro vitledwithratchet teeth, a motion transmitting wheel having ratchet teeth engaged with said first-named ratchetteeth-,- a; driving chain having connection intermediate the ends thereof with said mot-ion transmitting wheel,- anchoring'devices for 'said chain, an arm having means adg-ustably-supporting said-anchoring devices, and a .yoke having bearings receiving-said shaft. 7 v :8.;A' polished rod. rotor comprising a unit having means polished rod, ashaft having connection with said power transmit-ting unit and being provided with teeth, amotion 1 transmitting wheel-rotatably mounted-on said shaft and having teeth, a spring urging said first and second-namedteeth: into engagement, a driving chain having connection with said motion transmitting wheel, anchoring devices for said chain, an arm supporting said anchoring: devices, a yoke receiving saidshaft, and a stirrup receiving a portion of said yoke to stabilize the same, said stlrrup being provided-; with means whereby the same maybe attached toajpolished rod trunnion.

= -9. polished rod rotor comprising a power transmitting unit having means vwhereby the same may be attached to a polished rod, a shaft having connectionwith said power transmitting unit/and being provided with ratchet teeth, a motion trans- "having bearings rotatably receiving said power transmitting unit,

ALEXANDER BOYNTON;

In testimony whjereof laffixmysignature.

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