US2238809A - Pump structure - Google Patents

Description

April 15, 1941- N. G. HALL E-rAL 2,238,809

PUMP STRUCTURE Filed Aug. 29, 1959 2 Sheets-Sheet l VU PAG/w55 April 15, 1941. N. G. HALL Em, 2,238,809

PUMP STRUCTURE wuz/WMS.

. /V-G/Val yGL.Parr zsh Patented Apr. 15, 15941 UNITED STATES PATENT OFFICE PUMP STRUCTURE Norman G. Hall and Grant L. Parrish, Port Angeles, Wash., assignors of cnet-fourth to David L. Hope, Cut Bank, Mont.

Application 'August 129, 1939, Serial No. 292,480

(Cl. S- 179) 6 Claims.

This invention relates to the class of pumps and pertains particularly to well pumps of the type employing a reciprocable piston.

The primary object of the present invention is to provide an improved well pump of relatively simple but durable construction, which is designed so that it may be quickly and inexpensively installed and may be repaired when and if necessary, at a minimum of expense and with a minimum expenditure of labor.

Another object is to provide an improved well pump having in the place of the usual solid plunger rod, a tubular plunger rod through which the Well fluid is withdrawn, the said tubular plunger rod being connected at its lower end with a fixed cylinder in which a piston, carried by the rod, operates. l

Another object is to provide in a pump structure Vof the character stated, a novel means for establishing `a, pressure within a chamber forming a part of the tubular rod whereby such pressure may be exerted -upon the fluid in the rod to effect the flow of the fluid as the rod is being raised, therebyv obtaining a` continuous flow of fluid during the upanddown strokes of the plunger. I

A further object is to provide in a pump structure of the character'stated, a novel means for securing the` piston cylinder at a desired depth withina well easing.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawings forming part of this specication, with the understanding, however, that the invention is not to be conned to any strict conformity with the showing of the drawings but may be changed or modied so long as such changes or modications mark no material departure from the salient features of the invention as expressed in the appended claims. 1`

In the drawings:

Fig. 1 is a view in vertical section through a pump structure constructed in accordance with the present invention, portions of the same beingl broken away and showingr the lower part of the pump within a well casing.

Fig. 2 is a sectional view on the line 2-2 of Fig. 1.

Fig. 3 is a longitudinal sectional view through the portion designated by the section line `{1I- 3 on Fig. 1;

Fig. 4 is a longitudinal sectional view through the `portion of the pump designated by thesection line 4'-4fon Fig. 1, the ends of the sections of Figs. 3 and 4 being joined on the lines A-A of these gures.

Fig. 5 is a longitudinal sectional view through the portion of the pump structure designated by the line 5-5 on Fig. 1, the ends of the sections 4 and 5 being joined together on the of these gures. l

Fig. 6 is a sectional View on the line 6-6 of Fig. 4.

Fig. 7 is a view in plan of one of the valve members of the structure.

Referring now more particularly to the drawings, the numeral I designates a support or platform on which is mounted a pump casing or body indicated generally by the numeral 2 and having attached to a side thereof a pivot bracket 3 on which is oscillatably mounted a pump handle 4. The top of this casing has a slot or opening 5 therein through which extends the operating link B which is pivotally attached at its upper end tol the handle 4 while the lower end of the link is pivotally connected, as at 1, to the pipe section 8 which forms the upper end of the tubular plunger rod.

Within the pump casing 2 is a spider guide 9 through which the pipesection 8 passes and is supported for vertical reciprocation within the casing, the upper end of this section being closed by the cap I0 and carrying a uid discharge nozzle II which is directed downwardly as shown for discharge into the upper end of a spout I2 which extends through the pump casing.

The pipe section 8 has connected therewith, by a suitable means hereshown as a collar I3, the upper end of a coil expansion spring I4 which surrounds it and which4 rests upon the pump casing support I. `This spring normally tends to lift the pipe section so as to facilitate its up-and-down movement in the operation of the pump.`

While there has been shown and described a handle for the actuation of the pump it is to be understood that this may be replaced by a sultable derrickstructure where it is necessary to operate the pump in a deep well and the employment of a hand operated handle of the type shown would not be feasible.

'Thereciprocable plunger, the upper portion of which has been indicated by the numeral 8; is designated as a whole by the numeral I5. This plunger is made up of the upper pipe section 8 which at its lower end is encircled by a relatively long skirt portion I6 which is secured about its upper end to the pipe section and which extends only aslight distance beyond 'the lower end of this lines B-B pipe section 8, as shown in Fig. 3. This skirt is spaced from the pipe section 8 so as to form a chamber I'I in the upper part of which air may be trapped and compressed in the operation of the pump for the purpose hereinafter stated.

The skirt I6 forming the body of the air chamber or pressure chamber is extended into and detachably secured to a valve cup I8. The lower end of this cup I8 has a reduced threaded opening I9 therethrough in which is threadably secured the upper end of the piston pipe 28. The said end of this pipe extends into the valve cup I8 and constitutes a valve seat. Within the cup I8 is :a valve unit consisting of a body 2I carrying radially extending guides 22 which slidably contact the inner surface of the cup so that the body 2| will maintain a position on the longitudinal center of the cup as it rises and falls therein during the operation of the pump. The body 2| carries upon its lower end a suitable weight 23 and a packing material 24 such as leather or any other suitable material, the packing material engaging the end of the pipe and closing the pipe, as shown, when the tubular plunger rod is moving upwardly.

The piston pipe which forms a part of the tubular plunger structure, upon its lower end carries the cup washers 25 which are secured in the usual manner between an upper collar 26 and lower collars or nuts 2l. The collar 26 is formed to provide ia series of upwardly extending spaced lugs 28, the use of which will be hereinafter stated.

The piston formed by the cup washers upon the ylower end of the pipe 2D works within a piston barrel or cylinder 29. The upper end of this barrel has secured thereto the inwardly extending studs 38 which are here represented as nuts supported upon screws 3I which pass through the wall of the barrel. These nuts or studs are adapted to engage between the lugs 2'8 of the collar 26 when the piston is drawn upwardly to the proper extent in the barrel.

The lower end of the piston barrel has the reduced threaded opening 32 therein in which is threadably secured the upper end of a tubular l foot valve unit 33 which is provided with the iluid inlet apertures 34 located below the end of the barrel 29. A set screw 35 extended through the wall of the piston barrel and engaging the foot valve unit or tube 33 secures the latter against turning. Within the lower part of the piston barrel or cylinder is a valve body indicated generally by the numeral 38 and having the same form yas the upper valve previously described and shown in Fig. 3. This foot valve body 36 rests upon the upper end of the foot Valve tube 33 to close the same when the piston is being lowered in the barrel.

The tubular plunger and the piston barrel have been illustrated as being disposed within a liner or casing which is indicated generally by the numeral 31. The piston barrel is secured in this` casing at a desired depth, in the following manner.

The lower part of the foot valve tube 33 has secured therein an end of a threaded stem 38 on which is mounted by means of the screw threads 39, a winged collar 40. The wings of this collar are indicated at 4I and they have pivotally attached thereto by means of pivot pins 42, a plurality of depending or hanging clutch lingers 43, the lower ends of which are'turned or curved inwardly to form the resilient lowerterminals 44.

Beneath the threadedv section 39 of the vstem 38, the stein is slightly reduced in diameter as' indicated at 45, and supports the upright cone body 46 which may be rotatable thereon and held against longitudinal displacement by the nuts 41 secured to the lower end of the stem. The resilient terminals 44 of the clutch fingers rest against the upwardly tapering face of the cone and it will be readily apparent that if the stem is rotated while the clutch fingers 43 are held against turning, their lower ends will be spreadapart or moved outwardly as they ride down upon the sloping surface of the cone body.

These clutch fingers are caused to engage the inner face of the casing 31 when the pump structure is placed in position so that after the piston barrel has reached the desired depth, upon rotating the plunger while the studs 30 are engaged between the lugs 28, the stem will be turned but the lingers, due to their frictional contact with the wall of the casing, will be held against rotation and thus when the stem is turned in the proper direction, the cone and winged collar will be moved together so as to spread the fingers into firmer contact with the casing wall. By this means the piston barrel may be set and secured at a desired depth in the well and by then longitudinally reciprocating the tubular rod, the upper and lower valves will be alternately opened and closed so that fluid will be drawn into the barrel and forced upwardly through the tubular rod to the discharge nozzle I I.

As the piston is reciprocated fluid will be forced up through the valve cup I8 and will rise in the chamber I'I, trapping air in the upper part of the chamber. This air will be placed under compression and thus when the piston is moving upwardly, at which time the valve 24 will be seated, the air compressed in the chamber I'I will exert suflicient pressure against the fluid lying in the cup I 8 and in the pipe 8, to raise the fluid and discharge it through the nozzle I I. During this upward movement of the piston, the lower or foot valve will naturally be unseated so as to draw uid into the piston barrel 29 and thus when the piston is again moved downwardly, the foot valve will be closed and the upper valve will open to allow the displaced fluid to flow through into the area of the tubular plunger rod lying above this valve.

From the foregoing, it will be readily seen that there has here been described a novel type of pump structure in which the plunger rod not only serves as a means for actuating the piston by which the fluid is drawn into the lower part of the piston cylinder, but also as a means for conveying the fluid out to the top of the well, the uid passing through the plunger rod as described. Also with the novel arrangement of the air trapping chamber above the top valve, a steady flow of uid from the discharge nozzle is assured on both the up and down stroke of the rod.

What is claimed is:

1. In a pump of the character described, a piston barrel, means facilitating securing said barrel vertically in a well hole, a tubular pump rod having an end extended into the upper end of said barrel, an inlet valve at the lower end of the barrel, a packing interposed between the rod and said barrel, an upwardly opening valve in the rod above said barrel, means for vertically reciprocating said rod, said rod having an outlet at its upper end, said barrel securing means including laterally shiftable clutch fingers supported from the lower end of said barrel, means facilitating the coupling ofthe barrel and the rod together whereby the same may be turned in unison, and means for effecting the spreading of said clutch fingers when said barrel is turned in one direction.

2. A pump, comprising a reciprocable tubular rod adapted to be extended into a wall hole, a valve cage connected with the lower end of the rod, a pipe connected at one end with said cage and opening thereinto, an upwardly opening valve member in the cage adapted to close the upper end of said pipe, a barrel into one end of which the lower end of the pipe extends, packing carried by the pipe and engaging the inner surface of the barrel, fluid inlet means in the lower part of said barrel, a foot valve closing said inlet means, a stem extending downwardly from the lower end of the barrel, an upwardly tapering cone body supported upon the lower end of said stem, said stem being threaded above the cone body, a collar threaded on said stem, a plurality of clutch fingers pivotally connected with said collar and having their lower ends formed for contact with said cone body, and means for coupling said barrel and pipe together whereby the barrel, stem and cone body may be turned relative to said clutch fingers to effect the lateral shifting of the latter into contact with a well hole wall.

3. A pump structure of the character described, comprising a tubular rod adapted to be inserted into a well hole and having a uid outlet at its 1 upper end, means for vertically reciprocating the rod, a skirt formed integral with the lower end of said rod and extending downwardly in spaced relation therewith beyond its lower open end, a

valve cage connected with the lower end of said skirt, a pipe having an end connected with the lower end of said cage and opening thereinto, an upwardly movable valve body in the cage to close said pipe, means forming a piston packing upon the lower end of the pipe, a piston barrel into one end of which said packing carrying end of the pipe extends, fluid inlet means for the lower end of the barrel, an upwardly opening foot valve for said inlet means, means connected with the lower end of said barrel for securing the barrel in a well hole, said means including laterally shifta-ble members adapted to frictionally engage the wall of the hole, means facilitating coupling the barrel and pipe together whereby the same may be turned together, and means operating o of said cylinder, an upwardly opening valve in said rod at a substantial distance above said piston, an upwardly opening valve at the upper end of said pipe, a threaded stem connected at one end with the lower end of said pipe to extend downwardly therefrom, an upwardly tapering cone concentric with and carried by said stem below the threaded portion thereof, a collar threaded on the stem, a plurality of clutch fingers pivotally attached to the collar and extending downwardly for contact at their lower ends with the side of said cone, and means for establishing a locking connection between said piston cylinder and the adjacent portion of the rod whereby rotary motion may be transmitted through the rod to the cylinder and to said cone to effect relative movement of the latter with respect to said clutch fingers.

5. A pump structure, comprising a tubular shaft designed for insertion into a well hole, the said shaft having a discharge means at its upper end and being open at its lower end, a piston unit carried upon and encircling the lower end of said shaft, a piston barrel having said piston unit slidably disposed therein, means connected with the lower end of the piston barrel constructed and arranged for securing said barrel in a well hole upon the turning of the barrel, means for directly coupling the shaft with and in the barrel for unitary rotation of the shaft and barrel, an inlet valve for the lower part of said barrel, an upwardly opening valve within the tubular shaft, and means for vertically reciprocating the tubular shaft with respect to the barrel.

6. A pump structure, comprising a tubular shaft designed for insertion into a well hole, said shaft having a discharge outlet at its upper end and being open at its lower end, a piston unit carried by and encircling the lower end of the shaft and including a collar having upwardly extending spaced lugs, a piston barrel into which said piston unit and collar extends, a plurality of studs secured upon the inner face of said barrel above said lugs and adapted to be engaged between the lugs upon axial movement of the shaft and barrel in one direction to lockthe barrel and shaft together for unitary rotation, an inlet valve for the lower part of said barrel, an upwardly opening valve in said tubular shaft, means connected with the lower end of the barrel which is so constructed and arranged that upon unitary rotation of the barrel and shaft in one direction the barrel will be secured in the well hole and upon rotation in the opposite direction the barrel will be released in the well hole, and means for effecting vertical reciprocation of the tubular shaft.

NORMAN G. HALL.

GRANT L. PARRISH.

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