US1570385A

US1570385A - Long-stroke amplifying device

Info

Publication number: US1570385A
Application number: US36835A
Authority: US
Inventors: Benjamin M Mcfarland; Max A Dimmick
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-06-13
Filing date: 1925-06-13
Publication date: 1926-01-19
Anticipated expiration: 1943-01-19

Description

Jan. 19,1926. 1,570,385

, B. M., M FARLAND ET AL LONG STROKE AMPLIFYING DEVICE Filed June 13, 1925 2 Sheets-Sheet 1 Jan. 19 ,1926; 1,570,385

B. M. M FARLAND ET AL LONG STROKE AMPLIFYING DEVICE BY Marga. D/wgi/z/r A TTORNE Y 15 part of this application.

Patented Jan. 19, 1926.

UNITED STATES ram-mm 1E. Hermann AND a. DIMMICK, or ELIDORADO,

nonesrnoxn AMrL-xrvme nnvrcn.

a ucs uon mam, 18,1925. Serial No. eases; I

To all whom it may concern: 1

Be it known that we, BENJAMiN M. Mo- FARLAND and Max A. DIMMICK, citizens of the United States, residing at Eldorado, in the county of Butler and State, of Kansas, have invented certain new and usefullIm provements in Long-Stroke Amplifying Devices; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a This invention relates ratus for wells and particularly to a long stroke pumping mechanism especially designed for pumping oil wells, and the primar object of the invention is to provide mec anism adapted to be associated with the walking beam of an oil well rig to increase the 'strokefof the pump rods beyond what would be their normal amplitude of movement' with the conventional pumping ele-- ments ordinarily consisting. of the walking beam, the power driven band wheel and the pitman 7 walking beam and the band wheel shaft.

The advantages of a long stroke pumping outfit for oil wells are now generally recog- 'nized so we will confine ourselves to a dearrangement of parts scription of the, novel and combination of parts, all of which will be specifically descrlbed hereinafter,:reference bein' had to the accompanying drawi s,inwich- 1g.- 1 is a perspective view of the lower part of an oil well rig to which our invention is a plied.

. Fig. 2 is; an e arged, fragmentary, side elevational view of the front endof a walking beam showing the stroke amplifying lever and certain of its connections.

Fig. 3 is a cross sectional view on the line 3-30f Fig. 2.

Fig. 4 is a cross sectional view on the line 44 of Fig. 2.

5 is an end-view of the walking beam- F g. and mule-head.

Fig. 6 is a cross sectional view through the main sill showin the clevis anchor for the:1 operating rods 0 the multiplying lever, an

to pumping appa-.

and 'crank connections between the Fig. 7 is across sectional view on the line 71- 01E 5. Referring now to-the drawings t e merals of reference 1 designates derrick floor, 2 the main sill, 3 oneof the jack posts, (of which there-are two, one on each'side of the band wheel) 4 the band wheel, 5 the by Y nuband wheel shaft, 6 the crank, 7 the itman and 8-the walkingfbeam on the amson post 9. All ofthe construction thus far described is standard rig and ordinarily the pump rod 10 is connected direct to the front end of the walking beamY8,-sometimes over a mule-head. When the pump rods were connected direct .to ,the front end of thewalking. beam the pump stroke, obviously,-"

could not exceed the up and down motion" of the front end of the walkin beam, but with our inventionthe use oft e amplifying lever imparts a reciprocatory motion to the pump rod equal to the amplitu'deof motion of the front .end of the walking'beam plus the motion of the front end of the amplifying lever so that more i fluid may be raised or each upstroke of the working barrel of the pum than will. beossible .whenthe pump r0 s are connected irect to the walkin beam.

The stro e amplifying lever is illustrated as comprising two

bars

11 and 12 which,lfor the sake of strength, may consist of channels. These are hung in U-sha edslings13 and 14 comprising straps whic hangfrom-f a fulcrum shaft 15 mountedin a bearing 16 bolted, orotherwise secured, to the walln'ng beam 8 in rear of the toe orflfrontend por-' tion thereof. The ends offtheslings are. spaced apart by

spacers

17 and 18 sleiived 'yto i'g.

,of the upon the shaft 15 and by referrin 4 it will be seen that either, orbot slings ma be removed from the shaft taking 0

h channels

11 and 12 are mounted in the shngs the nuts '19 and 20. :The' bars or,

intermediate'their ends and they are located on the respective sides of, the walking beam so that the lever may straddle the walking beam. At the forward ends of thebars or

channels

11 and 12 are two segmental-plates 21 and 22 connected at their up er ends by a yoke-bar 23, and pivoted to t e plates 21 and 22 are segmental bars24 and 25 curved on the panel arcs as the plates 21 and 22. The plates and the-

bars

24 and 25 constitute a mule-head with

grooves

26 and 27 in the g front edges of the .plates 21 and 22 and the plates in any appropriate manner,-but inv ig. 2 we have shown a simple form of pivot consisting of a bolt 33 for connecting the bar 24 to the plate 21. Obviously,-the bar 25 may be connected to the plate 22 in a like manner. Each

bar

24 and 25 is held in extended position, or. full line position illustrated in Fig. 2, by braces. One brace is illustrated in Fig. 2 as comprising a bar 34 pivoted to a bracket 35' on'the channel 11 and having a pivot connection 36 with a link 37 in turn pivoted at 38 to the bar 24.

Men the parts are in the position shown in Fig. 2 the line of compression against the bar 24 will be through the bolt 38, the bolt 36 and the pivot 39 on bracket so the brace will hold the bar 24 in extended positiom This will be the position occupied during the pumping operation. When, however, it is desired to pull the rods for inspection or repairs the lower part of the mule-head, consisting of the bars 24 and which hang links 44 and straddlin 25, should be swung inwardly out of the way then it is only necessary to break the joint at 36 so that the parts can be caused to assume the dotted line-position shown in,

Fig. 2.

We have only described the connections between the bar 24 and the bracket 35 on channel 11, but attention is called to the fact that the bar 25 is connected to its chan- 'nel 12 in substantially the same way that the bar 24 is connected to the channel 11. The rear ends of the two

bars

11 and 12 of the amplifying

lever carry bearings

40 and 41 in which are shafts 42 and 43' from channel 11, and links 46 and 47 strad ling the channel 12.- The

links

44 and 45 carry at their lower ends a pin 48 with a spacer 49 thereon extending through the eye 50 of a pull rod, or operating rod 51 while a similar rod 52 is connected to the links 46 and 47 in the same manner as the rod 51. The

rods

51 and 52 have at their lower ends

separate parts

53 and 54 connected lay-turnbuckles 55 and 56. The eyes 57 an 58, at the lower ends of the

rods

51 and 52, are connected to a clevis, consisting of the

side bars

59 and 60 and the'bottom plate 61, by a bolt 62 which asses through the

side bars

59 and 60 and t rough the

eyes

57 and 58. The

side bars

59 and 60 are bolted to the sides of the main sill 2 b a bolt 63 and at the lower. ends of the Si e bars 59 and the- 60 are openings through which the

tongues

64 and 65 of the bottom plate 61 project so" that the clevis, formed by the side bars 59- and 60 and the plate 61, is fastened to the main sill.

When the walking beam is rocked on the Samson post 9, receiving its motion from the band wheel 4 and its connections, the amphfying lever will be swung in a vertical are but as the fulcrum 15 is moved upwardly the pull of the rods 51 and'52- will impart a swinging movement to the amplifying lever so that it will havea movement independent of the movement of the walking beam, therefore the lift on the pump rod 10 will exceed that which would be imparted to the pump rod if it was connected to the end of the walking beam and inversely when the front end of the walk ing beam is swung downwardly the

rods

51 and 52 will impart a correspondingreverse movement to the stroke amplifying lever so that the stroke of the pump rod will be increased above normal and thereby pump a greater amount of fluid from, the well at each stroke than can be pumped with the same working barrel'under normal conditions. By the pump rod, of course, we mean the entire string of pump rod members normally used in a well.

7 One of the advantages of our invention is that it can be installed onan ordinary walking beam and that one end of vthe amplifying lever can be fastened, or anchored,

lever pivoted intermediate its ends to the walking beam, a mule-head on one end of the lever, means associated with the mule-head for connection with the polish rod clamp of an oil well pum and means for anchoring the rear end of the lever in fixed relation with respect to the floor of the rig.

2. In. combination with the walkin of an oil well rig, of a stroke amp ifying lever pivoted intermediate its ends to the walking beam, rigid rods pivotally connecting the rear end of the stroke amplifying lever to a rigid part of the rig, and means on the front end of the lever for connection to the polish rod of an oil well 3. A pumping apparatus comprlslng a walking beam, an amplifyin lever, comprising two spaced bars stradd ing the walking beam, having a common fulcrum, intermediate their ends mounted upon the beam.

walkin beam, rods connecting the rear ends of the gals to a rigid support, and a mulehead connecting the forward ends of the bars.

4;. A pumping apparatus comprising a walking beam, an amplifying lever straddling the beam and pivoted thereto intermediate its ends, means, for holding the rear end of the lever in relatively fixed position, and .a mule-head on the other end of the lever.

5. A'pumping apparatus comprising a walking beam, an amplifying lever straddling the beam and pivoted thereto inter Lmediate its ends, means for holding the rear end of the lever in relativelyfixed position, and a mule-head on the other end of the lever, the mule-head having a flexible loop receiving portion- 6. A pumping apparatus comprising a walking beam, an amplifying lever straddling the beam and pivoted thereto intermediate its ends, means for holding the rear end of the lever in relatively fixed position, a mule-head on the other end of the lever, the mule-head having a flex ible loop receiving portion, and arcuate guiding grooves for a flexible connecting member.

7. A pumping apparatus comprising a fulcrum having means for attachment to a walkin beam, a pair of slings hung on the ends of the fulcrum, spaced parallel bars hung in the slings, a mule-head connecting the forward ends of said bars, rods loosely connected to the rear ends of said bars, and means on the rods for connecting them to a support.

8. A stroke am lifying apparatus comprising a fulcrum aving means for attach ment to a walking beam, spaced bars pivotally hung from the ends of the fulcrum, arcuate plates secured to the forward ends of said bars, means connecting the upper ends ofsaid plates, the edges of the plates and the edge of the connecting means having guide grooves, and anchoring means on the rear ends of the bars.

9. A stroke amplifying apparatus comprising a fulcrum having means for attachment to a walking beam, spaced bars pivotally hung from the ends of the fulcrum, arcuate plates secured to the forward-ends of said bars, means connecting the upper ends of said plates, the edges of the plates and the edge of the connecting means having guide-grooves, and anchoring means on the rear ends of the bars, said means comprising pairs of links connected to said bars and rods connected to the links. I

10. A stroke amplifying apparatus comprising a fulcrum having means for attachment to a walking beam, spaced bars pivotally hung from the ends of the fulcrum, arcuate plates secured to the forward ends of said bars, means connecting the upper ends of said plates, the edges of the plates and the edge of the connecting means having guide grooves, anchoring means on the rear ends of the bars, said means comprising pairs of links connected to said bars and rods connected to the links, and anchors engaging the lower ends of the rods.

11. A stroke am lifying apparatus comprising a fulcrum, aving means for attachment to a walking beam, spaced bars pivotally hung from the fulcrum, segmental plates vertically supported by the bars, arcuate bars pivotally' supported by the plates, collapsible braces between the arcuate bars and the first named bars, and anchoring means on the rear ends of the first named bars.

In testimony whereof we aflix our signatures.

BENJAMIN M. MCFARLAND. MAX A. DIMMIGK.