US643156A

US643156A - Plant for operating motors.

Info

Publication number: US643156A
Application number: US69397498A
Authority: US
Inventors: Miles W Quick
Original assignee: Individual
Current assignee: Individual
Priority date: 1898-10-19
Filing date: 1898-10-19
Publication date: 1900-02-13
Anticipated expiration: 1917-02-13

Description

Ptenied Feb. e3, |900.

M. w. uumk.

PLANT FOR OPERATING -NIUTURS (Application `filed Oct. 19, 1898.)

2 Sheets-Sheetl l.

(No Model.)

FIG. s

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WITNESSES:

TH: Nonms Ferias co., Fumo-ums., wAsmNaToN. n c.

n, 643.156. Y Patented Feb. 13, |900.

` M. w. uulcK. PLANT FUR OPERATING MUTURS.

(Appncagicn fusa bet. 19, 189s.) (No Hndel.)- 2 Sheets-Shel# 2.

www M Atty.

Y TTE STATES PATENT OFFICE.

MILES lV. QUICK, OF TITUSVILLE, PENNSYLVANIA.

PLANT FOR OPERATING MOTORS.

SPECIFICATION forming part of Letters Patent No. 643,156, dated February 13, 1900.

Application filed October 19, 1898. Serial No. 693,974. (No model.)`

T0 all whom it may concern:

Be it known that I, MILES W. QUIoK,a citizen of the United States, residing at Titusville, in the county of Crawford and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Plants for Operating Motors, of which improvements the following is a specification.'

The invention described herein relates to certain improvements in apparatus for pumping oil-wells. In Letters Patent Nos. 595,205 and 595,206, dated December 7, 1897, two systems for pumping wells by means of motors at each well and connected to a central power plant are shown and described. In one of the systems the motors at the wellsft'. e., cylinders and pistons-fare operated to raise the pump-rods by a iiuid which is placed under a pressure higher than atmospheric pressure by the central plant. In the other system the motors at the well are operated by atmospheric pressure,the cylinders of the motors being connected to a central exhaust plant, whereby a vacuum can be produced on one side of the piston of the cylinder, so that atmospheric pressure on the opposite side of the piston will shift the latter to raise the pump-rods. l

As is well known among oil producers, the

oil will liow into some wells with sufficient v The capacity of other wells is so limited that the pumps cannot be efficiently run faster than one or two strokes 0r slower per minute.

The object of the present invention is to provide for the automatic regulation 0f the number of strokes of the pumps in accordance with the producing capacity of the wells; and in general terms the invention consists in the construction and colnbination, substantially as hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is aview, partly in elevation and partly in section, of the pumping apparatus at each well. Fig. 2 isa sectional elevation of the motor-cylinder and its valve mechanism. Fig. 3 is a side elevation of the motor-cylinder. Fig. 4 is a top plan of the cylinder and a sectional plan of the valve mechanism. Figs. 5 and 6 are sectional views, the planes of section being indicated, respectively, bythe lines o fv, Fig. 5 5

4, and VI VI, Fig. 5.

In the practice of my invention the piston 1 of the motor-cylinder2 is connected in any suitable manner to the pulnp-rod, extending down into the well to be pumped. A convenient form of such connection consists of the pivotally-mounted walking-beam 4, having its ends connected,respectively,to the pist0n-rod 2L and pump-rod 3. When the motor is connected, as shown, to the pump-rod, the upper end of the cylinder 2 is connected bya port or passage 5 to the valve-chamber which is also connected by a port 6a and pipe 7 to a suitable source of fluid under pressure, as a centrally-located air-compressor. (Not shown.) The valve-chamber is also connected by a port 8 and pipe or `passage 9 to an exhaust-chamber 10, which is connected to the lower end of the cylinder 2 by a port or passage 11 and has an outlet which is preferably connected by a pipe 12 to the inlet of the air-compressor. The inner wall of the valve-chamber is formed with groovesV or

recesses

13, 14, l5, and 16, the

grooves

13 and 16 being in communication with the` and when shifted to the opposite end of its' stroke the groove or recess 19 will connect the ports 5 and 8, so as to permit the iiow of Huid-pressure. from the cylinder. It is preferred to effect the longitudinal movements of the valve by means of Huid-pressure; but its movement may be effected in other ways, which will readily suggest themselves to those skilled in the art. To effect the longitudinal movement of the valve" by duid-pressure, longitudinal grooves 2l and 22 areformed in the Valve, extended, respectively, `from the

peripheral grooves

18 and 20 toward the ends IOO of the valves. These grooves 21 and 22 are arranged in different radial planes an angular distance apart corresponding to the rotation imparted to the valve, as hereinafter described. By the rot-ation of the valve the grooves 21 and 22 are brought alternately into register with grooves 23 and 24, formed in the inner wall of the valve-chamber adjacent to its ends, as clearly shown in Fig. 5. These grooves do not extend to the heads of the valve-chamber, and in order to connect them with the spaces between the ends of the valve and the heads of the valve-chamber notches 21a and 222L are formed at the ends of the valve in line with the grooves 21 and 22, as shown in Fig. 5. In order `to exhaust the air from the ends of the valve-chamber,

ports

25 and 26 are formed in the valve in such manner as to vconnect alternately the axial opening in the valve with the grooves 23 and 24 in the Wall of the valve-chamber. The port 25 at one end is arranged in line with the groove 22 at the opposite end of the valve and the port 26 in line with the groove 21. The'axial opening in the valve'is in constant communication with the exhaust-port 8 by a vport 27 in the valve. It will be understood by reference to Figs. 5 and 6 that if the "and notch 21a to the left-hand end of the valve-chamber and shift the valve .to the right.

The rotation of the valve is effected by a stem 27, provided with a head or enlargement 28, projecting into a recess in the end ofthe valve, yas shown in Figs. ltand 5. lA lever 29 is secured to the outer end of the stem, and on its outer `endisloosely mounted a sleeve 30. A rod 31, which is connected to the piston-rod 2, passes loosely through the sleeve and is provided with adjustable shoulders 32 and 325, adapted to strike against the sleeve, and thereby shift the valve on its axis. While this construction of valve mechanism has'been found torb'e especially effective, any other form or construction of valve mechanism adapted to be controlled by the movements'of vthepiston to control the flow of fluid to and from the cylinder may be employed'for that purpose.

ber 10 and the cylinder is vcontrolled bya valve which is constructed to remain lnor mally open, so as to allow an unobstructed` or suddenly increased by reason of a quickl movement of the piston. While any ccn- The same :movement struction of valve mechanismadapted to operate in the manner stated may be employed, the form shown is preferred. This valve consists of a disk 33, pivotally mounted in such relation to the port or passage 11 that when moved to its seat l'low of Huid-pressure to the cylinder is prevented. This valve is, held normally open by any suitable means-as, for

example, by a weight 34, secured to its outer 4may be regulated bya plug or other suitable v In order to pre'- formof valve in the pipe 9. vent the valve 33 from being clogged by oil or by the freezing of condensed fluid, a trap 37, provided with a valved outlet-pipe 37,is formed in the vacuum-chamber 10, as shown.

The operation of'myimproved pumping apparatus when employed in connection with a vacuum system,as described in Letters Patent No. 595,205, is as follows, the several parts of the apparatus being in the position shown in the drawings-'t'.- e., the pump-rods being raised yand the regulating valve 33 open'to permit the escape of iiuid from the lower end of the cylinder: As soon as the piston reaches the lower limit of its stroke or approaches thereto oneof the collars or shoulders, as 32, on the rod 31 will strike the .lever 29, so-as .to shift the valve 17 axially, thereby openingthe exhaust-ports at-'one end of the valve-chamber and opening the inlet-ports at the opposite end, so as to shift valve 17, and thereby cut off the flow of fluid-pressure to the cylinder and connect the same to the exhaust-port 8. If-the well produces with sufticient rapidity Vto-keep the pump-barrel full, no regulation of the downward movement of the pump-rodsIand upward movement of the pistonactuated by said rods is necessary other than that effected by the liquid in the well. In awell of such capacity the liquid being at nearly a constant height will buoy up the piston of the pump-barrel, and therebyprevent such a rapid movement of the piston in the mot'or-cylin der as would aifectthe regulatingvalve -In other words, the-movement of the 4piston 'of the motor-cylinder when actuated by the descending pump-rods in a rapidly-produ cing well would be so slow that'the The connectionbetween the vacuum-cham-` inflowing Huid would not affect the valve 33, the latter being Vso weighted vor otherwise yieldingly held as to hold it open under'such conditions as against the inflow of tluidfcaused by the upward movement'of the piston.

It is characteristic of vthemovement ofthe pump-rods in wells which do not produce with sufficient rapidity'to maintain-a nearly constant'heightof liquid in the pump-barrel of IOO IIO

the well that the downward movement of the pump-rods until the piston of the pump-barrel strikes the fluid is rapid, resembling a plunging movement. This plunging through the unfilled spacein the pump-barrel, the extent of which is dependent upon the rapidity of flow of liquid in the well, will produce a similar quick plunging movement or jump of the piston of the motor-cylinder. This jump of the piston 1 will produce a vacuum in the lower end of the cylinder, and thereby cause Aan inrush of iiuid past the regulating-valve 33. This sudden movement of the iiuid will shift the valve 33 to its seat, and thereby check any inward iiow of iiuid into the cylinder,

so that the further upward movement of thel piston will be resisted by fluid-pressure on top of the same.

-As it is not desired to wholly prevent or check the complete downward movement of the pump-rod, the regulating-valve 33 or its seat is left rough or unfinished or otherwise so constructed as to permit when the valve is seated a slow flow of fluid from one end of the cylinder to the other, or provision may be made for effecting the same approximate equalization of pressures on opposite sides of the piston by any other means known in the art whereby the portions of the cylinder on opposite sides of the piston may be connected.

As soon as the dropping pump-rods cause the motor-piston to com plete its reverse stroke the valve 17 is shifted, admitting fluid to the pressure side of the piston. The resultant lifting stroke of the piston increasesthe dens-v ity of the fluid in the vacuum end of the cylinder and the automatic or governing valve 33 is opened and not again closed until by successive lifting strokes the accumulated product gathered in the bottom of the well is exhausted, and the working or pump barrel does not fill. The weight of the descending pumprods, increased by the superincumbent weight of liquid in the well-tubing, which is supported by the movable or working valves in the pulnp-barrel,causes a rapid or plunging movement of the piston, and fluid violently rushes into the vacuum end of the cylinder and closes the automatic valve 33 by reason of a reversal of the unequal pressures on its opposite sides. This valve may also be so adjusted that after being closed by the violent inrush of air or other iiuid it will leave its seat when the superincumbent-liquid supported by the pumping-valves reaches and is supported by that which is taken in and partially fills the pumpbarrel, and the vacuum on the vacuum side of the piston is proportionately reduced.

It will be readily understood from the foregoing that by regulating the iniiow of fluid to the vacuum side of the piston l its upward movement, as actuated by the pump-rods, can be accurately controlled.

It is characteristic of my improvement that only the downward movement of the pumprod is regulated, the upward or liquid-lifting movement being the same, regardless of the rapidity of production in the well. In other words, it is the purpose of my invention to so control or reduce the movement of the motor-piston during the dropping of the pumprods as to allow ample time for oil or other liquid to gather in the well in suliicient quantities to ll the pump-barrel Without in any manner impairing the rapidity of the lifting stroke.

I claim herein as my invention- 1. The combination of a motor-cylinder, a piston therein connected to apump, amotivefluid supply to one side of the piston, a valve controlling the admission and exhaust of said fluid, a controlling-duid supply to the other side of the piston, and means controlled by the movement of the pump-piston for varying said supply, substantially as set forth.

2. The combination of a motor-cylinder, a piston therein connected to a pump, a motiveiiuid supply to one side of the piston, a valve controlled by the piston for controlling admission and exhaust of said fluid, a controlling-fluid supply to the other side of the piston, and a valve adapted to be shifted by fluid-pressure for controlling the iiow of iiuid into the opposite end of the cylinder, substantially as set forth.

In testimony whereof I have hereunto set my hand.

MILES W. QUICK.

Witnesses:

S. A. SMALL, A. ll/IANDELL.