US1911170A - Pump - Google Patents

Description

`May 23, 1933. R N vlcKvERs 1,911,170

' PUMP Filed April 21, 1952 A f5 24 5mm;

'Patented May 23, 1933' UNITED STATES PATENT OFFICE IRICI-IIIAIRJI) N. VICKERS, vOIF SMACKOVER, ARKANSAS PUMP Application filed April 21,

This invention relatesto deep well pumps and has for its object the provision of means whereby an accumulation of pressure around the plunger may be avoided so that the re- 5 sistance to the downward stroke of the plunger, which has been heretofore encountered, will be overcome. The invention is illustrated in the accompanying drawing and will be hereinafter irst fully described and ,lo then more particularly defined in the appended claims.-

In the drawmg, Figure l 1s a vertical section through a deep Well pump having th'e tube and a ball valve 4 being located freely within the cage. To the upper end of the tubular body 1 is secured a sleeve 5 and in the upper end of this sleeve is threaded a couplingbody 6. The body 6 is provided o with' reduced extensions or necks 7 and 8 at its lower and upper ends, respectively, and both said necks or extensions are internally threaded, as shown. A valve chamber 9 is formed in the lower end of the coupling body Gand a free ball valve 1() is disposed in said chamber, a seat 11 being held to the lower is threadedrinto the lower end of the' neck 7 as clearly shown. Annular shoulders 13 and 14 are formed by the ends of the body 6 around the respective necks 7 and 8 and a passage 15 is formed through the body to lead from the lower shoulder 13 to the bore of the upper neck 8 while a similar passage 16 leads from the valve chamber 9 to thev upper shoulder 14 at the outer side of said neck 8. A section 17 of the outer casing 1s threaded onto the upper end of the-,coupling body 6 and it will be seen at once that an annular space is provided between the neck 8 1932. Serial No. 606,705.

and said section 17 corresponding to the annular space between the neck 7 and the sleeve 5. Threaded into the neck 8 is the lower end of a cylinder or standing tube 18 the upper end of which is open, and fitted closel but slidably in the cylinder or standing tu e 18 1s a plunger 19, as shown. The upper end of the plunger is threaded into a head 20 on the upper end of which is formed a sub 21 to be attached to the sucker rod or other pumping element. The lower end of the head 20 is externally threaded, as clearly shown, and an outer sheath or working sleeve 22y is engaged at its upper end with the externally threaded extremity of the head and depends from the head to fit closely but slidably around the cylinder or standing tube 18. It will now be understood that, assuming the plunger to make an up stroke, liquid will be drawn past the lower valve 4 into the interior of the sleeve 5 and will thence flow through the passage l5 into the lower end of the .cylinder or standing tube 18. On the ensuing downV stroke of the plunger, the liquid wifill be vforced back through the passage 15 but the valve 4 will be seated and the pressure upon the liquid will thereupon cause it to unseat the valve 10 and flow upwardly past the same through the passage'l into the interior of the casing section 17 whence it will rise to the surface.`

It will be noted that an annular chamber 23 is formed between the sheath 22 and the plunger and above the upper end of the standing tube or cylinder 18, which chamber will vary in its cubic content as the plunger end of the body by an annular vplug 12 whlch and the sheath recip-rocate vertically. It has been found that some liquid will find its way into this annular chamber and will resist the downward movement ofthe plunger so that the plunger cannot make a full stroke and the operation of the pump becomes difficult. It is a particular object of the present invention to relieve this back pressure and, to such end, radial ports 24 are formed through the upper portion of the plunger to communicate with the annularv chamber 23 at their outer ends and at their inner ends communicate with an axial bore or chamber 25 formed in the plunger and extending through the upper extremity of the same. A valve chamber 26 is formed in the lower portion of the head 2O and a ball valve 27 is placed in said chamber to rest upon a valve seat 28 which is held upon the end of the plunger by an internal annular shoulder of the head, as clearly shown in Fig. 2. Radial ports 29 lead from the upper end of the valve chamber 26 through the head so as to communicate with the interior of the pump casing, as shown, so that any water or other liquid which may find its way into the valve chamber 26 will escape into the outer casing and will rise to the surface with the main body of the liquid being forced up vby the pump. On the down stroke of the plunger, the lower end of the head will impinge upon the liquid which may haveaccumulated in the chamber 23 and will tend to compress it so that it will be forced inwardly through the ports 24 to the chamber 25 and thence rise past the valve 27. Said valve will obviously prevent back flow of the liquid but will permit its escape through the ports 29 which Willoccur as the liquid accumulates in the valve chamber 26.

From the foregoing description, taken in connection with the accompanying drawing,

it will be seen that I have provided an eX- ceedingly simple means for relieving the back pressure upon the plunger due to the accumulation of liquid around the upper portion of the same. The cost of adding this structure to pumps now in existence of the type illustrated is practically nil and the eiiciency of the pump is very greatly increased.

Having thusdescribed the invention, I claim 1. A pump comprising a standing tube, a solid plunger Working snugly in vsaid tube, a head lconnected to the upper end of the plunger and provided with a chamber, a sheath carried by the head and depending therefrom and telescoping the standing tube, the plunger being provided with a central longitudinal bore opening directly into the chamber of the head and having passages leading from the space between the plunger and the sheath ,through the upper extremity ofthe bore, said chamber being in communication with said passages and having ports leading outwardly therefrom through theside of the head, and a valve disposed within the chamber at the upper end of the longitudinal bore for controlling the passage of `,iluid through said bore into the chamber.

2. A pump comprising a standing tube, a solid plunger working snugly in said tube and having its upper end provided with a central longitudinal bore opening through the top thereof, a head connected with the upper end of the plunger and provided with a longitudinal chamber of greater cross sectional diameter than the bore and communieating therewith, a sheath depending from the head and telescoping the standing tube,

there being unobstructedlateral intake passages leading from the space between the plunger and sheath into the lower end of said bore and unobstructed lateral escape ports formed in the head and communicating with the upper portion of the interior of the chamber, and a single valve disposed within said chamber at the upper end of the longitudinal bore and beneath the lateral escape ports for controlling the passage of liquid through said bore into the chamber.

3. A pump comprising a standing tube, a solid plunger working snugly in said tube, a head connected to the plunger and provided with a chamber, the upper end of which is closed, a sheath depending from the head and bearing against and tclescoping the standing tube, the upper portion of the plunger being provided with a centrally disposed longitudinal bore opening directly into the chamber of the head and having unobstructed radial intake passages leading from the space between the plunger and sheath into said bore, a valve seat disposed-at the upperl end of the bore, there being radial escape ports leading outwardly from the chalnber above the valve seat and discharging at the outer surface of the head, and a single valve engaging said valve seat for controlling the passage of liquid through the bore into the chamber.

4. A pump comprising a standing tube, a solid plunger working snugly in said tube and having its upper portion recessed to form a longitudinal bore extending for a portion of the length of the plunger and opening through the top thereof, a head connected with the upper end of the plunger and provided with a chamber the upper end of which is closed, a sheath depending from and telescoping the standing tube, said plunger being provided with radial intake passages leadinO from the space between the plunger and` sheath into the bore near the lower end thereof, there being radial escape ports formed in the head and leading outwardly from the chamber near the closed end thereof, and a valve at the upper'end of the bore and spaced from the escape ports for controlling the passage of fluid through said bore into the chamber.

In testimony whereof I alix my signature.

RICHARD N. vIcKERs. FL. SJ

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