US1970620A - Pumping unit - Google Patents

Description

T. S. PARK PUMPING UNIT Aug. 21, 1934.

Filed Feb. 20, 1931 3 Sheets-Sheet l T. S. PARK PUMPING UNIT 3 Sheets-Sheet 2 Filed Feb. 20, 1931 oooecacalfloficoooooooo 0 no 2 o 000 now/W000. Iona aoooooao 7 or I 4 1 7 2 a v/ 44 p z Aug. 21, 1934.

T. s. PARK PUMPING UNIT 5 Sheets-Sheet 3 Filed Feb. 20, 1931 Patented Aug. 21, 1934 UNITED STATES 7 WW PATENT. OFFICE 4 PUMPING Um'r Tracy S. Park, I-Iouston, Tex., assignor to Cameron Iron Works, Houston,.Tex., a corporation Application February 20, 1931, Serial No. 517,197

' '6 Claims. .(01. 74--37) This invention relates to a novel pumping unit.

One object of the invention is to provide a pumping device of the characterdescribed spe-v cially designed for operating deep well pumps and whereby a straight pull may be exerted on the sucker rod through which the pump is operated.

Another object of the invention is to provide a pumping unit of the character described having novel means for connecting the pump sucker rod to the driving mechanism for operating the pump.

A further feature ofthe invention resides in a novel type of driving mechanism whereby .the pump may be operated'and which will reverse the pump stroke without severe strain or vibration of the pump mechanism.

The invention also comprehends, in a pump operating mechanism, a flexible driving member, or chain, with means for regulating the tension thereof, means for guiding the same, and a wrist pin mounted to move with said 1 driving member and connected, in a novel manner, to theoperating rod, or sucker rod, of the pump.

The invention also includes a novel counter balancing means for the pump, as well as a novel, structure for mounting and supporting the operative' parts of the pumping unit. I

With the above and other objects in view the invention has particular relation to certain novel features of construction, operation, arrangement of parts and use, an example of which is given in this specification and illustrated in the accompanying drawings, wherein:

Figure 1 shows a side view of thedevice shown partly in section. i v V Figure 2 shows an enlarged elevational view of the rod clamp showing the wrist pin of the driving mechanism in section. V

Figure 3 shows a front elevation of the pumping unit.

Figure 4 shows a horizontal sectional view taken on the line 44 of Figure 3, and

Figure 5 shows a horizontal sectional view of the complete unit. v

Referring now more particularly to the drawings,wherein like numerals of reference designate similar partsin each of the figures the numerals 1, 1 designate the side members of the supporting base of the unit arranged adjacent one of which is an. intermediate beam 2. These members 1 and 2. are preferably of I beam construction andare connected at their ends by the cross bars 3, 3

and also have the intermediate connecting and this mast adjacent its upper end and. at their other ends to the opposite I beam 1 adjacent the ends of the supporting base. A tripod supporting structure is thus formed. The anchor 5 has a'transverse bearing 8 therethrough in which the shaft 9 is mounted to rotate and onthe opposite 1 beam there is also mounted anupstand ing bearing member 10 having a transverse bearing'll aligned with the bearing 8 and in which said shaft 9 also rotates. Fixed on the shaft 9 between the anchor 5 and the bearing support 10 there is a momentum wheel 12 fixed to one end of which there is a ring '13 formed with sprocket teeth 14.. This momentum wheel may be of any selected form but preferably comprises a hollow. drum having a suitable opening through which it may be filled with concretious material, sand or the like to give it the desired weight, said opening being normally closed by the/plate 15. The outer end of the shaft 9 has a sprocket wheel 16 over which the sprocket chain. 1'7 operates and by means of which said chain is driven. There is a shaft 18 through a transverse bear-. ing in the mast adjacent the upper .end thereof and the forwardendof this shaft has an eccentric pin 19 on which the sprocket wheel .20 is mounted to rotate. The chain-.17 operates also over said sprocket wheel 20. The oppositeend of the shaft 18has a rearwardly extended. arm 21 and a tension rod 22.is connected at its upper. end to the outer end of this. arm and at its lower end works through a bearing 23 which is secured. tothe anchor 5. Adjusting nuts 24 are threaded ed on to the lower end of the tension rod22 and surrounding saidrod and interposed between the nuts 24 and the bearing 23 there isa strong coil spring 25. By the adjustment of the nuts 24 the tension ofthe chain 17 may be regulated in an obvious manner. r

'Fastened to the chain 17 there is a wrist pin anchor 26 having an inwardly extending end between the turns of said chain and said inwardly turned end has a forwardly extending wrist pin 2'1 which works through a'bearing 28111 the rod clamp 29.. This clamp may be secured to the pump sucker rod 30 as shown in Figures 1 and 2.v A cable. 31 is attached, to the upstanding car 32 of said clamp and works over a sheave 33 at the top of the mast and attached to the other end of said cable there is a counter weight 34 which is mounted on rollers 35 which run on the tracks 36. These tracks are attached at the upper ends to the top of the mast and decline outwardly This counter pump rods on down stroke or idle strokeof the:

pump.

There is a substantially elliptical track 3"? preferably formed of angle iron, and anchored to the cross bars 38 which in turn are secured to the,

mast and mast anchor as shown."

bearings 39, which rides around the inner side of said flange and these rollers serve to guide the wrist pin anchor in a uniform course asthe chain 1'7 revolves.

The rod clamp 29 has a suitablereservoir 41. through which a lubricant may-be fed to the bearing 28. a H v The shaft 9 may be driven" in any suitable manner. As shown there is an electric'motor 43. mounted on a suitable transverse frame 44 which is supported on the base of the unit and loosely mounted on the shaft of said motor there is a sprocket wheel 45 which is aligned with the sprocket 14 over which operates the driving chain 46"through which rotation is imparted from the sprocket wheel 45 to the shaft 9.

The sprocketwheel 45 may be clutched with or declutched from the motor shaft through any suitable type of clutch 47. f

As the shaft 9 is driven the chain 17 will be caused to revolve carrying the wrist pin anchor and the wrist pin with it and causing a reciprocation of the sucker 'rod 30. Upon upstroke when the wrist pin 27 reaches'a position concentrio with the sprocket wheel 20the upward movement of the wrist pin and the pump rod will stop and the anchor 26 will swing around said center preparatory to the downward stroke of the pump and during such movement the pump rod will temporarily stand still. I Whenthe outer end of the anchor 26 has moved around the upper end of the track 37 thereturn or downward movement of the wrist pin 27 will begin and as the chain 17 continues to revolve, the downwardstroke of the pump will be accomplished.

When the wrist pin 27 reaches the lower end of its stroke in a position concentric with the lower sprocket wheel 16 such downward movement will stop and the wrist pin anchor 26 will swing around the lower end of the track 37, the

pump rod meanwhile remaining stationary until.

a sudden return movement at theend of each stroke and will be relieved of the sudden strain 1 and vibration incident thereto. 7

' The unit herein described is of ajcompact and.

unitary structure and may be readily moved from place to place and adjusted on thederrick floor 48 into the desired position relative to the well ciprocated up and down in an exact vertical,

direction through the stuffing box at the upper end of the pumptubing, thus relieving the rod from side strains and relieving said stuffing box from unnecessary wear. V I

,The drawings'and description disclose what is now considered to be a preferred form of the invention by way of illustration only, while the broad principleof the-invention will be defined by the appended claims.

What I claim is:

1. A pumpingmechanism i including a sup porting structure, an endless, flexible, driving element mounted to revolve thereon, an anchor on and movable with the driving element,-means on said anchor between the runs of said driving element adapted for connection to the pump to v be operated, atrack on said structure associatedwith said driving element, and bearings on the anchor which run on opposite sides of said track.

2. A pumping mechanism including a supporting structure, sprocket wheels on said structure; one above the other, a single driving sprocket chain which operates over said wheels, an eccentrio on whi'ch one of said wheels is mounted, means acting yieldingly on said eccentric to regulate, the tension on said chain, an anchor on said chain, a wrist pin on the anchor between the runs of the chain located to travel parallel with theside runs of the chain as the chain revolves, said anchor being shaped and mounted to pass, with the chain, around said wheels to permit continuous revolutions of the chain, a rod clamp for engaging the pump rod and having a bearing in which said wristpin works. a f

1 '3. In a pumping mechanism a supporting base, a supporting structure including spaced upstanding bearing members thereon having aligned bearingsfone of said bearing members forming an ,anchor, a .mast telescopically, connected to and upstanding from said anchor, pump opera'ting means on said supporting structure and a drivingshaft insaid bearings and operatively connected with saidpump operating means.

4."A' pump operating mechanism including a, supporting structure, a pair of wheels rotatably mounted thereon,.an eccentric on which one .of

said wheels is mounted tojrotate, a singlei endless flexible driving element on, anddriven by one ofsaid wheels, means acting. yie'ldinglyjonf said eccentric through which the tension on the driving element is regulated, means for varying the Said driving element for the connection of a pump rodthereto, a

,5. A pump operating mechanism including a supportingstructurean upper. and a lower wheel said regulating means comprising a tension member connected atits upper end to'saideccent'ric and whose lower end has a yieldable adjustable connection with afixed anchor, means .onsaid driving element for the connection of a pump rodthereto, said connecting means comprising-a wrist pin anchor having an inwardly extending end between the turns of the driving element and a wrist pinion said anchor located at alltimes approximately-midway between the side runs of said driving element.

6. A pumping mechanism including .a supporting structure, sprocket wheels on said structure,,one above theother, a driving sprocket chain which operates over said wheels, an anchor on said chain, a wrist pin on the anchor between the' runs of the chain located to travel parallel with the side runs of the chain as the chain revolves, a" track on said structure associated with the chain'and' bearing means on the anchor to cause the anchor to follow the course of: said track asthe chain revolv s. V J 3 .TRACY s. PARK.

, influence of said regulating means and .means on.

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