US2211965A - Chain mechanism for connecting pump rods with walking beams - Google Patents

Description

C. R. ATHY Aug. 20, 1940.

CHAIN MECHANISM FOR CONNECTINGEUMF RODS WIITH WALKING BEAMS z'sheets-sneet 1 Original Filed Nov. 9, 1956 Aug. 2o, 1940. c. R. ATH# 2,211,965

CHAIN MECHANISM FOR CONNECTING PUMP RODS WITH WALKING BEAMS original Filed Nov. 9, 1936 2 Sheets-Sheer 2 Patented Aug. 20, 1940 Unir-Eo stares CHAIN DIECHANISM FOR CONNECTING PUMP RODS WITH WALKING BEAMS Clifford R. Athy, Columbus, Ohio, assignor to International- Stacey Corporation, Columbus,

Ohio, a corporation of Ollio Original application November 9, 1936, SerialgNo.

109,852. Divided and this application November 22, 1937, Serial No. 175,948

Claims.

This invention relates generally to well pumping mechanism and has particular reference to Walking beams and appliances suspended therefrom for producing straight line motion of associated pumpingmeans.

It is a well known expedient in the art of well pumping to provide a pivotally mounted oscillatory Walking beam wherein the outer or well end thereof is provided with a cable attaching head having an extended arcuate surface, the latter registering in all operating positions of the beam with the vertical plane of the pump rod, the said arcuate surface having secured thereto a iiexible attaching cable for uniting the beam head with the pump rod, the'arrangement providing for the correct straight line motion of the pump rod irrespective of the oscillating motion of the associated Walking beam.

in prior devices of this type, however, it has been customary to employ stranded wire cables for effecting the 'suspension oi the pump rods from the arcuate surface of the beam head. Continued use of such cables under the heavy tensile strains and loads which they are called upon to carry and repeated'exing thereof, often results in the breaking or parting of the cables with attendant delays and difficulties in making repairs.

It is the purpose of the pres-ent invention, therefore, to provide au improved flexible connecting means for uniting the .beam head with the pump rods, or other similar suspendedtools, wherein the connection comprises a plurality oi rollertype chains which have their links joined so that 5 the chain will be freely ilexiblc in vertical planes passing through the arcuate face of the beam head but relatively inflexible in planes transverse thereto, the said chain connections providing greater mechanical strength rand longer life for use in the capacity set forth than the stranded wire cables heretofore utilized.

Another object of the invention resides in the provision of improved means for connecting the upper ends of the chain members with the arcuate surface of the walking beam head, the connection providing a high degree of mechanical strength, together with ease of application in the positive securing of the chains to the beam head.

This application constitutes a division of my prior application, Serial No. l09,852, filed November 9, 1935.

For a further understanding of the invention, reference is to be had to the following description and the accompanying drawings, wherein: 5 Fig. l is a side elevation of walking beam and disclosing the application of the chain hangers comprising the present invention to the pumping head thereof;

Fig. 2 is an enlarged vertical longitudinal sec- 60r tional View taken through the pumping head of (Cl. M -103) the walking beam and disclosing the chain hangers; v

Fig. 3 is a iront elevation thereof;

Fig. 4 is a transverse vertical sectional View on the line IV-IV of Fig. 3;

Fig. 5 is a horizontal sectional View through the upper portion of the pumping head on the plane indicated by the line VV ci 1vfig. 2;

Fig. 6 is an enlarged vertical longitudinal sectional view taken through the hanger used to connect the lower ends of the supporting chains and the upper portion of the polish rod, the plane of the section being indicated by the line VL-VI oi Fig. 3;

Fig. 7 is a horizontal sectional View ou the plane indicated by the line VII-VII of Fig. 6;

Fig. 8 is a detail horizontal sectional view on thc plane indicated by the line VI'iI-VII of Fig. 2.

Referring more particularly to' the drawings, the numeral l .designates a walking beam, the latter being pivotally mounted intermediate its ends, as at 2, upon the upper end of a Samson traine 3, the latter rising from a base ll. Mounted on the base #l is an engine 5, which is employ-ed to rotate one' or' more cranks the lat ter being connected byone or more pitman members 'l with the inn-er portion of the beam i. The extreme inner end ofthe beam I may be provided with counterbalancing Weights of the type indicated at Pivotally mounted as at 9 on the forward or outer end of the walking beam is an arcuate pumping head it which is formed from a plurality of sheet and cast steel members welded or otherwise united to compose an integral unit. In this instance, the head includes an arcuate outer surface ii, the center or axis of which is the pivotal mounting 2 of the beam. Arranged for engagement with the surface H is a pair of roller-type flat link chains I2, these chains being of the type involving articulated side links united by transverse pins containing surrounding bushings and/or rollers, the links of the chain being indicated at I3, the bushings or rollers at I4 and the uniting pins between adjoining pairs of links at I5.

It will be seen that a chain of this type is freely flexible and will readily conform to the arcuate surface Il of the head l0 during the oscillation of the beam l. Moreover, there no undue stress o1' strain on the chain in any of the working positions of the head. The forces upper end of the head by the provision of anV anchor block I6. This block is` formed of cast til .Il therein.

steel or other suitable alloy and is positioned at the upper end of the pumping head between the spaced side plates I l thereof to which it is welded as at I8.

the openings thereof upwardly directed as illustrated in Fig. 4. These hook lugs each receive one of the transverse pins and bushings l5 and I4 respectively. At the sides of the upper hook of each set and spaced therefrom are outwardly directed lugs 20, the same each being provided, in registration with the centers of the hooks, with a perforation. The side plates of the upper links of the chains are positioned in the spaces between the lugs 2B and the hook lugs I9 with the bushings in the opening of the hooks. Extra long pins Ilia are then passed .through the perforated lugs 20, the side plates i3 and the bushings l5, one of the ends of the pins ld being headed and the other ends being provided with an opening to receive a cotter pin 2i to prevent the undesired removal of the pins and the release of the chain. This construction provides for the secure retention of the upper ends of the chains in connection with the pumping head and the proper lateral spacing of the sup porting chains.

At the lower depending ends of the supporting chains, there is provided a polish rod hanger 22. This member comprises a cast metallic body 23 provided with an open sided slot 23a for the reception of the polish rod 24. At its upper end, the body 23 is provided with spaced lugs 25 each having a horizontally extending bore formed The spacing of the lugs Z5 is the same as that of the hook lugs provided on the block IB in order that the chains will remain parallel throughout their entire length. The bottom side links of the chain are arranged on either side of the lugs 25 with the perforation in registration with the bored holes in said lugs. The lowermost pins I5 extend through the aligned openings to secure the chains to the hanger body.

The polish rod is removably held in connection with the hanger by providing the latter with a pair of opposed recesses 25 adjacent the outer edge of the slot 23d. A T-shaped hanger shoe 2'! is supported at the sides in the recesses 26 and the inner face thereof is inclined slightly from the top toward the polish rod. A bolt 28 extending through an opening in the shoe 21 retains a clamp key 29 in proper position in connection with the shoe. A clamp wedge 3B is disposed between the key 29 and the polish rod 2d, the surf face of the wedge in engagement with the rod 24 being grooved to t the same. The shoe 27 is also provided with a plurality of clamp screws 3l, the inner ends of which engage the key and force the same against the wedge 35, the latter being thereby forced into clamping engagement with the polish rod. The inclination of the outer face of the Wedge and the shoe 2l causes the former to be forced into still rmer engagement with the polish rod upon any downward movement of the latter with respect to the hanger.

From the foregoing, it will be seen that the present invention provides a strong flexible chain construction for uniting pump rods and the like with the outer end of an oscillatory walking beam. The construction involves all required factors of mechanical strength and manufacturing and installation economy and simplicity. The chains possess unusually long life and freedom from mechanical disorder, requiring but a minimum of The front face of the block I6 is pro-pM vided with spaced sets of hook lugs I9 having attention to maintain the same in full working order.

What is claimed is:

1. In a well pumping mechanism of the type having a walking beam with an arcuate head,

an outwardly and upwardly directed hook provided at the upper end of the arcuate face of said head, a perforated lug provided in spaced horizontal registration with said hook at each side thereof, a roller type chain disposed in engagement with the arcuate face of said head, a roller of said chain being positioned in the opening of said hook, a side link of said chain being positioned in the spaces between the sides of said hook and said lugs, and a pin extending through the perforations in said lugs, the side links of said chain and a longitudinal opening in the roller positioned in said hook.

2. In well pumping mechanism of the type having a walking beam with an arcuate head, a plurality of transversely spaced outwardly and upwardly directed hooks provided near the upper end of the arcuate face of said head, a perforated lug provided in spaced horizontal registration with each hook at each side thereof, a plurality of roller type chains disposed in engagement with the arcuate face of said head, a roller of each chain being positioned in an opening in one of said hooks, side links of said chain being positioned in the spaces betwen the sides of said hooks and said lugs, and pins extending through the perfor-ations in said lugs, the side links of said chains and longitudinal openings in the rollers disposed in said hooks.

3. In well pumping mechanism of the type having a walking beam with an arcuate surfaced head, a polish rod in vertical registration with the head and a polish rod grip provided with a plurality of transversely spaced lugs, connecting means uniting said polish rod and head, said connecting means comprising a plurality of transversely spaced outwardly and upwardly directed hook members provided on said head, the spacing between said hook members being substantially equal to the spacing between the lugs on said polish rod grip, a plurality of roller type chains secured at their lower ends to the lugs on said rod grip, certain rollers adjacent the upper ends of said chains being disposed in said hooks, and means for positively securing said chains to said head adjacent said hooks.

4. In well pumping mechanism of the type having a walking beam with an arcuate surfaced head, means for securing chain elements to said head comprising an anchor block rigidly carried by said head, a plurality of transversely spaced outwardly and upwardly directed hook members formed on said anchor block, and a perforated lug projecting from said block at either side of each hook member and spaced therefrom, the perforations in said lugs being in registration with the openings of said hooks.

5. In well pumping mechanism of the type having a walking beam with an arcuate surfaced head, means for securing chain elements to said head comprising an anchor block rigidly carried by said head, a plurality of transversely spaced groups of longitudinally spaced hook members formedv on said anchor block, and a perforated lug projecting from said block at either side of each hook member and spaced therefrom, the perforations in the lugs on opposite sides of each hook being in registration.

CLIFFORD R. ATHY.

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