US1560870A - Walking beam for oil wells and the like - Google Patents

Description

Nov. 10, 1925- G. P. SLATER mums BEAM FOR on; WELLS AND THE LIKE Filed Aug. 1924 Patented Nov. 10, 1925.

GUY I. SLATER, F T LSA-,oK LAHQMA.

WALKING BEAM non OIL wnnnsnlvn THE LIKE.

Application filed August 7, 1924. 7 Serial No. 730,742-- To all whom it may concern:

Be it known that I, GUY P. Snarnn, a citizen of the United States of America, and resident of Tulsa, in the county oi Tulsa and State of Oklahoma, have invented certain new and useful Improvements in 7 Walking Beams for 'Oil WVells and the like,"

of which the following is a specification.

This invention relates to machine elements and particularly to walking beams.

It is an object of this invention to produce a walking beam with parts associated with it having a capacity for absorbing shocks and vibrations, due to the use of the walking beam in connection with pumps for oil wells and the like.

It is well known that walking beams for such use, especially in very deep wells are subjected to considerable strain and it is an object of this invention to associate with the said walking beam, novel means for relieving the apparatusand the pump from undue strainand vibration It is a further object of this invention to produce a walking beam having a truss or base extending from the center toward each end and to provide novel means for adjustably anchoring the truss in order that compensation maybe attained for taking'up lost motion and the like.

It is a further object of this invention to provide anchorages at the ends of the beams for the pitman stirrup and temper screw and a central trunnion and coupling wherebythe trunnion is secured to the beam.

i Vith the foregoing and other objects in view, the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawing forming ,part of this application, wherein like characters denote corresponding parts in the several views and in whicht Figure 1 illustrates a top plan view of a walking beam embodying the invention; Figure 2 illustrates a side elevation thereof;

Figure 8 illustrates a view in elevation of a pitman stirrup;

Figure i illustrates an enlarged detail view of the end of the Walking beam on which the pitman stirrup is mounted; and

Figure illustrates a sectional View of,

the pitn an stirrup box. a

In these drawings, the beam is shown as being :tormed oi' a'plurality of parts includ'- ing sides 10 and 11 comprising channel plates which. are in spaced relation to eachv other and the space therebetween is cov;

ered by a top plate 12 secured to the flanges of the channel plates by fastenings 13, such as rivets or the like.

. A bottom plate 1 L similar to the plate 12 I is secured tothe' bottom flanges of the channel plates. The top plate and bottom plate have apertures 15 and 16on each side of the center of the beam through which truss rods 17 project, it beingv shown that eachtruss rod. extends diagonally through the beam from the top to bottom and that the adjoiningends oi the truss rods are connected by. a link 18, although other means may be resorted to for connecting the truss rods or, under. certain conditions, a continuous rod may be employed. The outer ends of threaded as at 19 to be engaged by nuts 20 in order that the tension of the truss rods may be increased or diminished to suit particular requirements. The rods extend through blocks 21 that are secured to the beam and each block has a diagonally disposed aperture 22 through which an end of one of the truss rods extends. Preferably, the truss rods are held in spacedrelation to the upper. plate of the beam by I- beams 23 that extend across the top 'of'the beam and rest thereon. A trunnion 24 for the truss rods are the I-beam, in the presentembodiment of the invention, extends across the top of the I-beam in engagement therewith and it is drawn into engagement with the beam by clips or yokes 25 comprising one or more U-shaped bolts whose looped portion or portions embrace the trunnion and whose ends extend through a plate 26 hearing against the bottom plate of the beam. The parts are held in the assembled relation just described by fastenings 27 such as nuts which are threaded on the bolts as shown.

The bearing 28 for the head'of the temper screw which is, of course, of ordinary construction, may be attached to the beam by fastenings 29 such as rivets, bolts or the like and the opposite end of said beam is pro vided witha pitman strap hearing or box.

In the present embodiment of the inven- I tion the pitman strap has its lower end boX or bearing 33 that is secured in placeby' fastenings 34L in the end by bolts, or the like, which bind the parts together as will presently appear. I V V t The under surface of the bearing block 82 is recessed to form a cavity 35 and depending side flanges 36 which embrace a yieldable cushion 37 so as .w confine the said cushion in the cavity between the bottom of the bearing and a base block 38, preferably of cast iron or the like, which rests on the upper surface of the beam. The fastenings 3% preferably eXtend through the cushion and the baseblo'ck so that these are anchored to the beam with the bearing for thepitman strap as is quite well shown in Figure 5. The presence of the cushion will permit certain yielding action of the bearing 32' according to the resiliency or yielding'character of the cushion and it will be understood that the cushion may be of increased or diminished thickness and yielding properties, according to the requirements in practice as to the" load that the beam must carry and the like. I

It will be seen from an inspection of the drawing that the flanges 26 are of such depth as to embrace thecushion and pan tially the sides of the base block, but there ,is a clearance between the flanges and the beam to permit movement of the bearing with relation to the base block and beam. This relation of parts insures proper guid ing of the bearing and aids in retaining the parts in their assembled relation.

It will also be apparent from an inspection of the drawing that the tension of the trusses may be increased or diminished and that a comparatively strong beam may be constructed from material of comparatively light gage and changes of course may also be made in the details of construction without departing from the spirit of the invention within the scope of the appended claims.

rods extend, and means on the outer ends of the truss rods for anchoring the same to the lower plate of the walking beam.

2; A walking beam for Well drilling and pumping comprising side channel plates. a top plate and a bottom plate above and be low the flanges secured thereto, I-beams extending transversely of the top plate on each side of the trunnion of the Walking beam, a yoke comprising U-shap'ed bolts inverted with respect to the walking beamand having their ends projecting through the top and bottom plates of the Walk-' ing beam, a trunnion resting on the upper plate of the walking beam and extending transversely thereof through the loop of the yoke whereby the trunnion is anchored on the Walking beam, truss rods supported on the I-beams'and having their ends connected together between the I- beams, the top and bottom plates of the walking beam having diagonally disposed apertures through which the trussrods extend, and means on the outer ends of the truss rods for anchoring the same to the lower plate of the walking beam.

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