US1406017A - Sucker rod - Google Patents

Description

n. E. L. ANn'c. w. HOLMES.

sucKER Roo. APPLICATION FlLED MAR. 22. 1921.v '1,406,017'.l Patented Feb. 7,1922.

`MIIIIIII waage ff W" i UNITED vs'lrATssl PATIENT oFFicr..

ROBERT E. L HOLMES, or EHILAEELPHIA, PENNSYLVnNIA, ANEGHARLES w. HOLMES, or NEW Yonx, N. Y., ASSIeNonS To xEYS'ToNE nnmLEnjcoMPANY, oE BEAVER FALLS, PENNSYLVANIA, A CORPORATION or IENNsYLVANIA.

f SUCKER non.

To all'whomztmy concern:

Be itknown that wle-ROBERT E. L; HoLMEs and CHARLES W. HOLMES, citizens of the United States, residing, respectively, at Philadelphia, in the county `ofPhiladelphia and State of -Penns lvania, and New York in the county of ew York and State of New York, have invented anew and useful Sucker Rod, Vof which the followingisI a specification.V

This invention has reference to sucker I rodsand is intended particularly for use in deep well pumps of the reciprocating. double piston type.

The invention relates more particularly tothe sucker rods of double 4sucker rods wherein one pump piston carried bya solid rod and the otherpiston is ,carriedV byahollow rod through which the solid rodfextends.- l 1 It is the object of the invention to construct the piston rods as to utilize resiliency or elasticity of the metal to relieve the shock due -to the closingr of the valves when each plunger starts on its upstroke.

. To do this, the cross section at the rjoints on both the inside and outside rods isso increased that the desirable resiliency is obtained by placing a comparatively heavy load on a Vgiven cross section of the center portion of the rods without straining the joints. 0f course, the same'result may be obtained by reducing the cross sectional area ofthe center and outer rod except at the joints to take advantage of the resiliency of the metal without straining or crystallizing the joints. y

'In accordance with'A the invention, the rod ends are upset lengthwise, either actually or effectively, and the meeting ends of the rods are united by couplings with the meeting ends of the hollow rods providedv each with -an internal circumferential groove, whereby a certain elasticity or springiness is imparted to therod. The groove so produced has a further function in providing in the hollow rod a lubricant container, whereby the movement of 'one rod with respect to the other distributes the lubricant on the inner surface of the hollow rod and on the outer surface ofthe solid rod, thereby avoiding the effects of wear.

The invention will be best understood from a consideration of the following de- Specification of Letters Patent.

vpressed in the appended claims.`

.Patented Febiv, kv1,9212."l

Application 1ed..-l\l[a,'rchA 22, 1921. Serial 110.454,50.

tailed description l taken in connectionfvwith the accompanying drawing, `forming-part of this specification, 4with the understandf ing, however, that the inventionis notffconlined to any strict conformity with, the `sho-wing of the drawing but maybe changedv and modified so long as such changes gand modiications mark-no material departurefrom the salient features ofthe invention asex- In the drawing:

Fig: 1 isa longitudinal section,zpartlyin elevation, of a pump cylinder, pistons and hollowand solid piston rods. l i 1 F ig. 2 is a" longitudinal section through ajoint of the hollow:` and 'solid rodsfonla larger `scale than'Fig. v l Yand*reinoved'from the pump casing.v A f i Referring to the drawings, there isshown a pump casing 1 to which-is connected a pum barrel 2, andthelatter is .Shownfas provided with a bushing or connection 3, to receive a .pumpstrainen Within the pump barrel 2 arev lodged two pistons 4.-,55 respectively of thetype ,employedv in `deep wells.- These pistons are ofthe reciprocatory-forni and are each provided: with valves which, however, are not particularly vlshown' in the drawings-for thef valves in .themselves','or evenv the specific structure -of VVthe land the rods is such that the pistons are reciprocated in opposition, so that, as is customary in such pumps, the two pistons propel a' continuous stream of vwater from the well.

The hollow pump rod 6 is composed of numerous sections joined end to end, the number of sections depending upon the depth of the well and the solid pump rod is likewise composed of numerous sections joined end to end. Each section of the pump rod 6 has longitudinally upset ends 8, each with a tapered outer threaded surface 9 and these threaded ends are joined together by a coupling sleeve 10provided with inner tapered screwethreads 11. The solid rods 7 is connected together at the meeting ends of the sections by coupling sleeves 12, and ntermediate of the coupled ends the solid rod is customarily of square shape, as shown at 13.,V The interior ofeach section of the hollow rod 6 has, for the greater portion of its length, v'a'v bore 14 of greater diameter than the terminal portions ofthe bore indicated e at and occupying-the upset ends 8 of the holow rod. Where that portion of the hollow rod of larger bore, as indicated at 14,

approaches the upset portion 8, that is, the portion of smaller bore, there is an interior I circumferential groove l16 deeper than the Y ing holes in the hollow rod, this being one l of the primary advantages of using the upset ends 'of the hollow rod. Furthermore, this produces a thickening of the metal at the point where friction occurs on the outside-rod and the added thickness thereby caused inY the walls of the hollow rodimaterially prolonging the life lof such outside or hollow rod. v

WVhat is claimed is :--V 1 Y Y.

1. A pump iodassembly for double piston deep well pumps, comprisinghollow and solid ,reciprocatory pump rods', with each rod provided with joints between'the meeting ends of the respective sections and the rod sections 'adjacent to the joints being ren- Y dered elastic vor resilient longitudinally 'to neutralizethe shock due to the closing of the valves on the up strokes of the rods.

-2.fA pump rod assembly. for double reciprocatory piston pumps, provided with joints between the meetingfends of the respective sections and the rod sections adjacent `to the joints being rendei'ed elastic or resilient4 longitudinally by producing Ycircumferential channelsiin their-Walls, therebyieducingthe thicknessof the vmetal Yat such points.

Y3. `A pump rod assembly, comprising hollow and solid concentric reciprocatory joints being upset and then'l reduced thickness in circumscribed zones toneutrall iZe the shock due to the closing of'th'evalves on the up strokes of the rods.

4c. A pump Irod assembly for double pis-V ton deep well pumps, 'comprising concentric hollow and solid pump rods reciprocable in ypumvp rods and pistons to correspond with v joints at the meetings ends Q f the respectiveV sections-'and' said rod sections adjacent the alternation and the outer rod having its sections provided with enlarged 5' couplings interiorlyreduce'd in circum'scribed ci'icuinferential Zones, whereby to lthere reduce the crosssectional area-and increase the elastic o rjresilient characteristic 'of therod andthus tend to neutralizethe shock to the rodV and valves due to the closing ofthe latter Y' on the up strokes of the rods.` i

5.*A pump ro'd assembly for double piston deep well pumps, comprising "coii'cen`v A trichollow and solidV pump rods with oin'ts atithemeeting ends of the-respective sections, withl the ends of the hollow sections l Y where connected together reduced in internal diameter and increased ineirternal diameter whereby there is added thickness and a localization of wear due toy friction between the two rods and a corresponding Vpro-* longation of thev'life of the 'outside or hollow rod. f Y

In 'testimony that we claim j the vforegoing as our own,-we havehereto 'aflixed our `sig'- natures. v

Vf-ROBERTfEQv L. HoLMEs Y CHARLES w. HOLMES, Y

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