US2169815A - Well pump operating mechanism - Google Patents

Description

Aug; 15, 1939. E. w. PATTERSON WELL PUMP OPERATING MECHANISM Filed Nov. 19,1935 3 Sheets-Sheet 1 ATTO o INVENT R. Yam? w mrri/w/v BY Q WN. 9M

RNEYS.

Aug. 15, 1939. E. w. PATTERSON WELL PUMP OPERATING MECHANISM Filed Nov. 19,1935 3 Sheets-Sheet 2 x INVENTOR. 0642 h/ Pif/fAJO/V BY I ATTORNEYS.

Aug. I5, 1939. E. w, PATTERSON 2,169,315

I WELL PUMP- OPERATING MECHANISM Filed Nov. 19, 1955 s Sheets-Sheet a 2 INVENTOR.

. u BY I ATTORNEYS.

[064? m gar/[mm Fatenied An. i5, i3

WELL PUMP OPERATING MECHANISM Edgar W. Patterson, Long Beach, Calif.

Application November 19, 1935, Serial No. 50,541

2 Claims.

This invention relates to a pump, and particularly pertains to a well pump construction es pecially adapted for use in deep wells, such as oil wells, and is a continuation-in-part of my pending application entitled Well pump operating mechanism, filed by me August 10, 1932, Serial No. 628,l24, and now Patent Re. No. 20,287 issued Mar. 9, 1937.

In elevating liquids from a well, and particularly when the liquids are drawn from a great depth, such as occurs in an oil well, it is necessary to provide a well pumping mechanism which will have means for automatic compensation of variation occurring on the downward or idle stroke of the structure and upon the upward or working stroke of the pump. In devices of this type it is usual practice to actuate a pump plunger mechanism within the fluid of the Well by means of a pump rodwhich is 'operatively connected to a rocking beam, and with which beam a pumping mechanism is associated. The rocking beam must under'normal conditions be disposed with its free end in a position of vertical that other operations might be carried on in thewell. It is the principal object of the present invention to provide a pump mechanism of a desired structure to apply power to the rocking beam on the up stroke and to compensate for the weight of the well rods and the pumping mechanism on the down stroke, said power applying and compensating mechanism being of a flexible character so that the entire pumping structure may be readily positioned in operative relation to a well, or readily displaced from said position without necessitating the dismantling of the structure or mechanically rearranging the parts thereof. I The present invention contemplates the provision of a pump structure which is power driven and includes a rocking beam, a pivotal mounting for an end thereof, a fluid counterbalanceimeans adjacent the free'end thereof, and power applying -means intermediate said counterbalance means and pivotalmounting and connected with the driving means, the various elements being articulately connected together and to a base whereby the entire structure may be bodily shifted from an operative to a non-operative position.

alignment above the pump casing, and under The invention is illustrated by way of example in the accompanying drawings in which: I

Figure 1 is a view in side elevation showing the preferred form of the invention with parts indicated in dotted lines to disclose the position of the various elements in a non-operative position.

Fig. 2 is a view in end elevation showing the structure of Fig. 1.

Fig.- 3 is an enlarged fragmentary view in side elevation showing the mounting for one of the 0 braces of a frame structure.

Fig. 4 is an enlarged fragmentary view in elevati lon showing the construction of the Samson pos s.

Fig. 5 is a fragmentary view inplan showing the structure of Fig. 3 as seen on the line 5-5 thereof.

Fig. 6 is a view in vertical section through the ztructure disclosed in Fig. 4, as seen on the line Fig. 7 is a view in end elevation showing the frame structure mounting as disclosed in Fig. 3.

Fig. 8 is a view in sideelevation showing another form of. the invention.

Fig. 9 is a sectional plan taken on the line 2-2 of Fig. 8.

Referring more particularly to the drawings, l9 indicates a sub-frame structure here shown as made of I-beams upon which are mounted a pair of parallel I-beams ll. These beams are spaced apart from each other and accommodate an air receiver i2 which is in the form of a tank of cylindrical section and which is secured rigidly with the I -beams I l to form a unitary base struc- 35 ture for the pumping mechanism. Cross plates it are secured to the I-beams H adjacent their ends to add to their rigidity. Mounted upon the base structure, comprisingthe beams Ill, Hand the cylindrical container i2, is a power unit i4. 40

This unit is here shown as comprising a driven pulley i5 geared to a suitable reducing gear set not shown in the drawings, but housed within the case I6. This gear set drives a shaft l1 carryingv 45 a drive disc i8. A crank pin I9 is secured to the drive disc and receives the lower end of a connecting rod 20. This connecting rod extends'upwardly and is plvotally connected at 2| to a rocking beam 22. The rocking beam swings in a vertical plane from a fulcrum pin 23. This pin is. secured in suitable bearings in the-upper ends of a pair of Samson posts 24, the lower ends of which posts extend downwardly along opposite sides of the base unit and are pivoted to the subframe members In upon pivot pins 25. The disc I8 is shown at one end of the crank shaft I! in Fig. 1 of the drawings. However, by reference to Fig. 2 it will be seen that a crank disc I8 is dis posed at each end of the shaft l1 and that crank pins iii are provided for each disc to accommodate connecting rods 20, one of which is pivotally connected to pins 2| carried by a cross head 26 extending from opposite sides of the beam 22. The beam 22 is also fitted with a cross head structure 21 carrying the pins 23 by which the beam is pivotally connected to the Samson posts 24. Mounted at the outer end of the rocking beam 22 is a horse head 28 which is provided with a segment 29 over which the reins 30 connect to a polish rod 3| by a cross head v32. Pivotally mounted upon a shaft 33 is a piston rod 34 which extends upwardly-into a cylinder 35. The structure of the piston rod and the cylinder is more clearly,-disclosed in my Patent Re. No. 20,287

' entitled Well pump operating mechanism, issued within the cylinder to force fluid through a central duct of the piston to a conduit 39, communieating with the air receiving cylinder l2, said conduit being controlled by valve 39. Attention is directed to the fact that the cylinder 35 with its piston 34 and the piston rod 34 act to cushion and counterbalance the vertical swinging movement of the rocking beam 22. It is further to be pointed out that this cushion and counterbalance structure is disposed between the point at which force is applied to the rocking beam 22 and the outer end of the rocking beam at which point the pump load is suspended.

It will be evident from an examination of Figs. 1 and 8 of the drawings that the supporting action of the counterbalance structure and the connecting rod 20 is variable. It is therefore necessary to constantly support the beam 22 from its rear fulcrum pins 23 and the cross head 21. This is done in the preferred form of the invention by diagonal brace members 40, which are pivotally secured to the fulcrum pins 23 carried by the cross head 21. The lower ends of the braces 40, as particularly shown in Figs. 3 and 5 of the drawings, are fitted with end members 4|, which receive pins 42 by which end members 4| are pivotally connected to shackles 43. These shackles 43 are in turn-pivotally connected upon pins 44 carried by bearing members 45 projecting upwardly from the subframe member i and make it possible for the shackles 43 'to swing on the pins 44 from the position shownvin solid lines in Fig. 3 to the position shown in dotted lines in the same figure. and in the direction of the arrow a. The pins 43 and 44 are formed with heads as shown in Fig. 5, which makes it possible for the shackle members 43 to be readily swung. Disposed on top of the outer ends of the shackles 43 in the position shown in Figs. 3 and is a block 46 carrying a clamping bolt 41. This bolt secures the braces 40 in their operative positions when'the structure is pumping. The bolt and the blocks may beremoved when the structure is to be disposed in a non-pumping position and will thus allow the shackles 43 to swing upwardly and over the pivots 44 to the dotted line' position shown in Figs. 1 and 3. It will be evident that when the braces 40 have been swung to their dotted line positions the beam 22 and the Samson posts 24 will be shifted horizontally and will cause the free end of the rocking beam 22 to shift away from its operative position over the mouth of the well. The shackles 43 at this time will cooperate with the brace members 42 to hold themselves in a locked position rearwardly of the fulcrum pins 44 without further fastening means.

In the form of the invention shown in Figs. 8 and 9 of the drawings, a modification of the structure previously described is shown. In this modification the Samson posts 24 are fitted with footings 48 and 49. These footings are adapted to alternately rest'upon structural members 54 and 5|, respectively. as the Samson posts 24 swing around a pivot 52. The posts 24 are held in their operative ,positions by brace rods 53 which are fastened to beams 55 by bolts 53. It will be seen'that when the bolts 56 are removed the posts 24 may swing so that the footing 49 will contact the member 5| and the weight of the. structure will hold the pumping mechanism in a non-operative position.

In the structure shown in Figs. 8 and 9. it will be'seen that a motor 51 is supported upon a vertically adjustable motor base 58 carried by and between the Samson posts.24, and that it drives a gear unit 59 through a suitable driving means 60, the unit being fitted with a driving sprocket 6| engaging a-drivingchain 82 which is led around a sprocket 33 to which the connecting rods 20 are secured. In the form of the invention shown in Figs. 8 and 9, the air receiver I2 is disclosed as disposed beneath the base structure of the apparatus and is equipped with an air compressor unit 64 by which a desired pressure of airnis maintained within the counterbalancing system.

In the form of the invention shown in Figs. 1

and 2, a different compressor unit is disclosed as 1 indicated at 45. This unit forms the subject matter of a co-pending. application filed concurrently herewith and entitled Compressor unit. This structure is generally characterized as including pitman 'rods 68 which are pivotally connected to the rocking beam 22 upon pins 31. The lower ends of the rods are connected with a cross head" attached to'a piston rod 38' which extends downwardly into a cylinder 69 and carries a piston I0. A pipe H communicates with the airjreceiver l2 and supplies air under pressure thereto as the apparatus reciprocates. An air by-pass regulating system generally indicated at 12 is used at will to compound the compressor 85-.

In operation of the present invention the preferred form of the structure is assembled as shown in Figs. land 2, and when so assembled the brace members are secured in the positions indicated in solid lines in Figs. 1 and 3. In this position 'the fulcrum pins 23 of the rocking beam 22 are shifted in a substantially longitudinal plane to and cushion the oscillating movement of the rocking beam on the load and non-load strokes of the pump. The action of this mechanism will be directly related to the pressure of the fluid within the air receiverlZ through the conduit 38 which establishes communication between the lower end of the piston 34 and the flow of pressure fluid to and from the air receiver is controlled by the valve 39. The desired fluid pressure is maintained by the compressor unit 55 which will act to make up and maintain a desired set fluid pressure within the air receiver 42. When the pumping unit is completely disposed in a non-operative position the bolts 41 are unfastened to release the shackles.

43 and to permit the shackles to swing on their pivots 44 in the direction of the arrow a as indicated in Fig. 3, until they reach a seated and abutting position upon the upper faces of the structural elements l0. As this takes place the Samson posts 24 will swing in the direction of the arrow 2) as shown in Fig. l of the drawings, and the pitman-rods 66, connecting rods 20, and

the cylinder 35, with its piston 34 and piston rod.

34 will swing similarly while the rocking beam 22 shifts horizontally and recedes from its operating position over the mouth of the well. In the form of the invention shown in Fig. 8, the same result will take place, although the structural details of the device are somewhat different. In any event, it will be noted that-the entire pump structure may be shifted readilyfrom an operative to a non-operative position, or vice versa, without requiring that any of the driving mechanism, the counterbalancing mechanism, or the rocking beam and the Samson posts structures shall be disconnected or placed in a condition which would require their reassembly or adjustment when moving from one intended position to another. It will also be evident that by repositioning. the brace rods 40 or 53 and fastening them in place by the bolts 41 or the bolts 58 the entire pumping mechanism will be restored to its original position and will be ready for instant use. Attention is further directed to the fact that in the form of the invention. shown in Figs. 1 and 2 the air receiver and the structural elements Ill and H associated therewith combine to form a rigidbase unit which will properly anchor the driving and operating mechanism and will firmly hold the pivotal mountings for the various oscillatingmembers.

The present pump means is concerned with a cushioning and counterbalancing structure which includes a cylinder-35 receivingthe piston 34 and the piston rod 34. This rod is tubular and establishes communication from the compression space in the cylinder to a receiving tank II. This communication is establishedthrough a connection leading from the member 33 to the valve 39. The member 33 is co-axial with the pivotal axis of the piston rod 34 so that at all times communication is directly established with the receiving cylinder l2. It will thus be noted that the compression chamber within the cylinder 35 and the receiving chamber will be in constant communication. At-

tention is further directed to the factthat the pump pressure unit 64 communicating with the receiver l2 acts automatically to maintain the air in the receiving tank at a constant pressure. This insures that performance of the cushioning and counterbalancing mechanism may be accurately set and controlled for any given conditions.

When it is desired to set the Samson post back it will be evident that regulation of the exhaust valve in the line'from the receiving tank to they .piston rod 34 will permit a relief of compression or suction in the cylinder 35 so that the parts may be shifted and that when the valve is closed the closed pneumatic system will cooperate in holding the Samson post and walking beam in their retracted positions.

It will thus be seen that the structure here disclosed comprises a compact and rugged well or pump mechanism having means for suitably cushioning and counterbalancing the pump strokes and for supplying power therefor, and which mechanism may be rapidly adjusled and firmly anchored to maintain the parts of the structure in their operat ve position, and easily manipulated to dispose the pumpstructure in a anon-operative position without requiring that the pump structure be dismantled or disassembled in anywise while being moved from one of ,said positions to the other.

While I have shown the preferred form of my invention, as now known to'be, it will be understood that various changes might be made in the combination, construction, and arrangement of parts, by those skilled in the art, without departing from the spirit of the invention as claimed.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In a well pump construction comprising a base, a post pivoted at its lower end to the base and normally rising vertically therefrom, a rigid brace member pivotally connected at its upper end to said post and'inclining forwardly and downwardly therefrom, parallel spaced shackles normally resting flatwlse on the base and pivotally connected adjacent to their rear ends to a portion of the base to swing forwardly and rearwardly in a vertical plane, a bolt upstanding rigidly from the base between the forward ends of the shackles by which the latter are normally anchored in forwardly extending position, the lower end of the brace member extending between the forward portions of the shackles and pivotally connected thereto to swing therewith, and normally positioned by its said pivot to bear solidly at its extremity against the base.

, 2. In a well pump construction comprising a base, a post pivoted at its lower end to the base and normally rising vertically therefrom, a rigid brace member pivotally connected at its upper end to,said post and inclining forwardly and downwardly therefrom, a shackle-member pivotally connected at its rear portion to the base to swing forwardly and rearwardly in a vertical plane and normally lying flatwise on said base with its forwardly extending portion securely anchored to a portion of said base, and a pivotal connection between the lower end of the brace member and the forward portion of the shackle member positioning said lower end of the brace member to normally bear solidly against the base.

EDGAR W. PATTERSON.

Images