US739831A - Pump. - Google Patents

Description

.PATBNTBD SEPT. 29', 1903.

0. L.v CLARK. PUMP.

APPLIOATIDN FILED Nov. 1, 1902.

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ma mums Param :s wrm-max N'rren STATES Patented september ee, '1903.

PATENT Ormes.

SPECIFICATION foi-ming part of Letters patent No. 739,831, date septembery 29, 190e. Application tiled November vI 1902. Serial No. 129,766. (No model.)

T0 @ZZ whom, t may concern:

Beit known that I, OLIVER L. CLARK, a resident of McDonald, in the county of Viashing-V ton and State of Pennsylvania, have invented a new and useful Improvement in Pumps; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to pumps for\pump ing deep wells, such as Artesian or oil wells. Y Heretofore in the pumpingof deep wells it has been the practice to connect the walkingbeam at the top of the well to the pump at the bottom of the well by means of jointed rods, commonly known as sucker-rods. The pump was lowered int'othe well by means of these sucker-rods,vr the connection of each succeeding rod being made with thepreceding one until the pump had been located-at the bottom of the well. As these 'suckerrods were about thirty feet' in length and the pump was often located at a depth of two thousand feet or more, the labor and expense of connecting up such a long line of rods were very great. Besides the tirst cost of procuring such a quantity of sucker-rods and making the connections there was in addition a lgreat expense incurred in the necessary repairs. The rods break or become disconnected, and the further pumping of the well 'is prevented until the necessary repairs have been made, causing a loss in the productionV of the well as well as the employment of a'dditional men to assist in the work of repair. Furthermore, if it was desired to remove the pump for the purpose of putting in new cups or for other repairs ther-ods were withdrawn and each disconnected as it reachedy ,the top .of the well, and as thestanding valve was seated inthe bottom of the working barrel said valve could not be removed without pull-f4 ing the tubing out of the'well, such an operation requiring the united eiiorts of three the working parts of the pump, including the' standing valve, may be withdrawn by said ,ing drawings, in Whichliney or cable without removing the tubing,

land the cost of operation is greatly reduced.

To these ends my invention comprises, generally stated,`a working barrel, a communieating tube within which said Working barrel `is located, an inlet-valve on said working yand passes into said working barrel, and

as the pumping-piston is raised the inletvalve is closed and the iiuid lifts the check- `valve in said working barrel and passes to the top of the well.

Theraising of the pumpingpiston creates a vacuum. in'the lower end of said working barrel, and upon the down-' stroke said pumpingpiston will descend, its

descent being further accelerated by the lweight of the uid entering the working barrel from the outer tube as the inlet-valve opens and admits iiuid thereto, while the vcheek-valve of the inner tube is closed and held closed by the column of fluid above same.

lTo enable others skilled in the art to make and use my invention, I will describe the same more fully, referring tothe vaccompany- Figure l is a vertical section ofawell,

yshowing myvimproved pump located therein.

Fig. 2 is an enlarged vertical section showing the position of the parts on the upstroke.

Fig. 3 is a like view showing position of parteV on downstroke. Fig. ltis a section on line 4:4, Fig. 3; and Fig. 5 is asection on line 5 5, Fig. 3. f

Like numerals indicate like parts Ain each of the figures.

In the drawings the numeral 2 designates an oil or like well, at the bottom of which is located the tube or casing 3, having the per forated anchor or plug 3a at the bottom thereof, through which the oil passes from the well into said tube. The tubing 4.- is connected to the tube 3 in the ordinary manner. Within the tube 3 is the working barrel A5, having secured thereto the standing valve 6, consisting of thecage 7 and ball '8, held therein and adapted to rest in a valve-seat 9, as in the usual construction of such valves. The standing valve 6 has the threaded neck portion 6', adapted to engage the threaded end of the working barrel 5, and thus act to close the lower end of said barrel.

At the lower end of the working barrel 5 are the packing-cups 10, which engage the inner walls of the tube 3and pack the lower end of said tube, so that fluid entering the perforated anchor passes up through valve 6 into space 11 between said tube and working barrel. The upper end of said working barrel has a shoulder 12, adapted to engage a corresponding shoulder 13 in the tube 3 when said working barrel is in position. Above the shoulder 13 is the cage 14, containing the check-valve 15, which rests normally on the valve-seat 16. The check-valve 15 has the stem 17 and the angular tailpiece 18, which permits the iiuid to pass up around the valvewhen said valve is raised, as will more fully hereinafter appear. The faces of the tailpiece 18 may be grooved to facilitate the escape of the Huid when the valve is raised. Any suitable form of check-valve may, however, be employed, and within lthe term check-valveI wish to include any form of valve which will act automatically to open and close the outlet of said working barrel at the proper time. The working barrel 5 is also provided with orifices 19, which permit the oil in the tube 3 to enter said working barrel. Within the working barrel 5 is the pumping-piston 20, which consists of the cups 21, held between nuts 22 and 23. Above the cups is the valve 24, comprising the cage 25 and ball 26, adapted to rest on the valve-seat. 'lhe purpose of valve 24 is to take up any oil which may leak past the cups into the working barrel below the piston. A piston-rod 24 extends up through the working barrel 5 and through the stem 17 of the check-valve 15. connected the wire or other Iiexible cable 27, said cable extending up through the tubing and attached to the walking-beam or other reciprocating device at the top of the well.

It is apparent that other forms of Valves may be substituted for those illustrated without departing from the spirit of my inven tion. v

The operation of my improved pump is as follows: The cable, which may be reeled up on a bull-wheel or other device at the top of the well, is attached to the piston-rod 24, and the working barrel 9 is then lowered into the well through the tubing until the tube 3 is reached. The working barrel 5 then enters said tube and is forced down into same until the shoulder 12 rests on the shoulder 13 of said working barrel. The pressure of oil in the well will act to raise the ball 8 of the standing valve 6, and said oil will enter the filling-space 11 between said working barrel 5 and said tube 3 and also pass through the orifices 19 into the working barrel 5 until same is filled. In the meantime the check-valve To the upper end of the piston-rod 24 isA 15 is held toits seat by the weight of the column of duid in the tubing. As the pumpingpiston 2O is raised by the wire line the oil in working barrel 5 is raised and the checkvalve 15 lifts, permitting the oil to pass up into the tubing. On the raising of the pumping-piston the standing valve 6 is closed, so that the oil in the working barrel is not permitted to pass back into the tube 3 through openings 19. The pressure caused by the upstroke of the piston bears on the valve 6 and acts to hold the working barrel securely in position within the tube 3 against the tendency of the piston to raise said working barrel by the friction of its cups. The oil raised by the pumping-piston passes out at the top of the well, and the piston then descends. On the descent of said piston the check-valve drops to its seat and is held there by the column of oil above, while the standing valve 6 opens and more oil is' admitted, which passes from the space 11 into the working barrel 5 through the openings 19. The pressure of the entering oil carries down the .piston 20, assisted by the vacuum in the working barrel created below said piston on its upward stroke. The piston is thus lowered by a steady positive movement without the em ploymentof a rigid connection between it and the source of power at the top of the Well, such as sucker-rods or like devices. The pressure of fluid or even the vacuum alone insures the descent of the piston without its sticking or catching in the tube. By myinvention the pump and valves, including the standing valve, can be removed from the well without removing the tubing vand repairs made with little labor and eX- Since a flexible line may be used, the

pense. necessity of disconnecting each section of a line of sucker-rods is avoided, and the line may be quickly reeled up on a bull-wheel or other drum, and all the work can be done by one man. The friction of the rods within the tubing is done away with and also the friction in the working barrel, so that the wear on the cups is greatly reduced.

What I claim as myinvention, and'desire to secure by Letters Patent, is-.

1. In a pump, the combination of an outer tube, a working barrel within said tube and communicating therewith, a valve on said working barrel adapted to admit Huid to space between said tube and workin g barrel,a checkvalve controlling the outlet of said working barrel, and a pumping-piston in said working barrel.

2. In a pump, the combination of an outer tube, a working barrel closed at its lower end within said tube and communicating therewith, a valve on said working barrel adapted to admit uid to space between said tube and working barrel, a check-valve controlling the outlet of said working barrel, and a pumpingpiston in said working barrel.

3. In a pump, the combination of an outer tube, a working barrel within said tube and communicating therewith, a standing valve IOO IIO

secured to thelower eud of said working barrel and closing the end of same, said valve being adapted to admit iuid to spaee between said tube and working barrel, a cheek-valve controlling the outlet of said working barrel, and a pumping-piston in said working barrel. v

4. In a pump, the Combination of an outer tube, a working barrel Within said tube and having openings at the upper end thereof forming communication between said tube and working barrel, a Valve on the lowel` end of said working barrel adapted to admit fluid to space between said tube and working barrel, a cheek-valve eontrolling the outlet of said working barrel, and a pumping-piston in said working barrel.

5,. In a pump, the combination of an outet tube, a working barrel within said tube and communicating therewith, packing material on the lower end of said working barrel engagiug the walls of said tube, avalve on said working barrel adaptedto admit fluid to space between said Working barrel and said tube, a cheek -valve controlling the outlet of said working barrel, and a pumping-piston in sai working barrel.

6. In a pump, the combination of an outer` tube, a working barrel within said tube, said Working barrel being closed at its lower end and having an opening forming communication between said working barrel and said outer tube, a valve carried by said working barrel adapted to admit iuid to the space between said tube and werking barrel, a cheekvalve controlling the outlet of said working n

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