US2187679A - Deep well pump - Google Patents

Description

Jag. 16, 1940. J. w. CHAMBERS DEEP WELL PUMP Filed Oct. 8, 1938 Jn. WWW/liens m om Patented Jan. 16, 1940 UNITED STATES PATENT OFFICE Application October 8,

5 Claims.

The invention relates to pumps for operating in deep wells for the lifting of liquid therefrom. It pertains particularly to a pumping unitl in which the prime mover is located adjacent the 5 pump and below the liquid level in the well.

It is an object of my invention to provide a pump of the reciprocating type wherein the motor and the pump are housed for introduction into the Well to the proper level therein.

It is a further object of the invention to provide a construction wherein the motor is housed within a closed chamber and sealed against the entrance of liquid thereto.

It is a further object of the invention to provide aK` pump of this character having a plurality of separate cylinders with rpistons working therein for the more eillcient lifting of large quantities of fluid when this becomes desirable.

I desire to provide a plurality of pistons connected with separate cross heads and operatively connected with the motor for simultaneous operation.

The device also contemplates the use and eiective application of the power from the motor to the pump pistons so that a comparatively large volume of liquid may be handled.

My device is adapted for handling liquid such as oil, water, or mixtures of both in a deep well, but is adaptable for general use when desired.

In the drawing herewith Fig. l is a centr l longitudinal section through the housing with t e pumping apparatus therein.

Fig. 2 is a similar sectional view taken at right angles to the view shown in Fig. 1.

Figs. 3. 4 and 5 are transverse sections taken on the planes 3--3, l-I and 5--5, respectively, of Fig. l.

My invention is housed within a tubular housing made up of connected sections of pipe. At the upper end of the housing I have a section I, which forms a housing for an electric motor 2. This motor housing is connected at its upper end to a closure plate 3. Said plate is threaded on its outer periphery at -4 for connection with the housing member I and has its upper end threaded at 5 for connection with a 'bushing 6, which is n turn threaded at 1 to connect with the wel ubing 8. 1

, The plate 3 has a series of openings therethrough for the reception of iluld conducting tubes -9. Said tubes extend longitudinally of a chamber IU in which the motor ishoused and act, to conduct uid through the'. motor chamber. The upper wall of the chamber through which .2. the tubes extend-hasa central opening therein 1938, Serial N0. 233,931

which is normally closed by a threaded plug Il formed with a Wrench socket I2 therein through which it may be inserted or removed from the wall or plate 3.

The motor on its lower side is seated within 5 .the recess I3 within a lower wall or partition I4. Said Wall closes the'lower end of the chamber I and has a central opening therein to receive the motor shaft I which projects downwardly through the partition. A stufiing box is formed about the motor shaft I5, as shown at I6, so that a seal -will be formed about the shaft to prevent leakage into the motor chamber.

It will also be noted from Fig. 2 that the wires I1 running to the motor are extended upwardly 15 through the plug" 3 and the bushing 6 through openings therein and it will be understood that the wires Il are properly sheathed and protected from the liquid within the well.

The plug or partition I4 forms part of a coupling member I1, which connects at its lower end with the gear housing I8, said ge'ar housing being in turn connected at its lower end with a nipple I9. Within the gear housing I8 are a plurality of gears which are mounted upon plates 20 and 20a, extending transversely of the hous- Ingand "connected at their edges with the interior wall thereof. As will be seen from Fig. 1, 'these plates 20 and 20a are secured in spaced relation to each other` by set screws shown in dotted lines at 2|. The plate 20 is a single continuous plate but the plate 20a is offset at its upper end, as shown at 22, to accommodate a bevel gear 23.

The gear 23 is mounted upon a shaft 24 rotat- 35 able within bearings in theplates 20 and 20a. On the same shaft with the gear 23 is a' small pinion 25. There is-a drive pinion 26 upon the end of the motor shaftgIS which engages with the bevel gear 23 and communicates rotation to 40 the shaft 24 and the small gear 25.

Said gear 2E has engagement witha large gear 21 mounted upon a 4shaft 28 journaled in the plates 20 and 20a for rotation. This gear has connection through an intermediate idle gear 45 29 with the gear 30, which drives a crank shaft 3l, said crank shaft being journaled in the plates adjacent the lower ends thereof;

The crank shaft 3| has on opposite ends thereof the two crank armsV 32 and 33. These arms 50 have'wrist pins 34 thereon which are connected by means of the two pitmans 35 with the upper ends of connecting rods 36.

The lower end of the gear housing IB s connected through the nipple I 9 with an interme- .55

diate connecting member 31, which is bolted to the nipple I9 as will be seen from the drawing. The lower end of the connecting member 31 is screwed within a pump housing.38. Said housing 38 is connected at its lower end with a shoe 39, which constitutes a closure for the lower end of the housing. Said shoe has therein four evenly spaced cylinders 40. Saidcylindeis are threaded at their lower ends to receive valve plugs 4I, which have axialopenings 42 therein for the passage of liquid into the said cylinders. Each pf said plugs has a downwardly tapered recess 43 at its vupper end to receive a ballvalve 44 opening upwardly to allow the entrance of liquid to the cylinders.

Within each of the four cylinders operates a piston 45. Each piston has a plurality of openings 46 therethrough for the passagey of liquid. A piston rod 41 connected with each piston has 'a valve plate 48 mounted thereon, said valve plate being slidable on the piston rod to and from closed `position above the openings 46. I provide a cross pin 49 in each of the piston rods to limit the upward movement of the valve plate.

As shown in the drawing each of the piston rods is connectedr at its upper end to a cross head 50. Each cross head, as shown in Fig. 4, is approximately semicircular in shape, one side fitting against the cylindrical inner wall of the housing 38 and the inner edge engaging against a guide rib 5|. The cross head has'a downwardly extending fiange 52 thereon which forms a sliding engagement with the housing. It will be obvious that the ycross head may be movable to reciprocate the two piston rods 41 secured thereon.

The cross heads are each connected to a connecting rod 36 previously noted. Said connecting rods are slidable'through bushings 53 secured within a transverse guide plate 54. It will be seen that the guide plate 54 extends diametrically across the housing but provides a space 55 on each side thereof through which the iiuid beingl pumped may pass. The guide plate is secured at its ends to the wall of the housing by screws 56, as seen in Fig. 2.

In the operation of my device the motor ma be connected in a circuit including the wires I1 from the surface, and when the device has been lowered to the proper position in the well the motor may be actuated to rotate the train of gears connected with the drive pinion 26 on the motor shaft. 'Ihis train of gears constitutes a reduction train of gears so that the speed of the motor is materially reduced when communicated to the crank shaft 3|. The rotation of the crank shaft will transmit a reciprocating motion through each of thel pitmans 35, connecting rods 36, cross heads 50, and pistonrods 41, so that the pistons may be operated. v

As each of th crank arms 32 extend in opposite directions 'from the crank shaft one of the cross heads with the pistons attached thereto will be moved downwardly as the opposite cross head is moved upwardly. l The action of the pump will therefore be to cause a continuous movement upwardly of fluid pumped therethrough. The liquid from the well will pass upwardly through the inlets 42 and the cylinders 40 and through the space between the two cross the surface where it will be discharged in the.

normal manner.

It will be obvious that this type of pump will operate and will be able to produce a satisfactory'- volume of liquid from the well when the device is vin operation.

I claim:

1. In a deep 'well pumping unit, a housing, a

shoe at the lower end' thereof, a plurality of cylinders formed in said shoe, aninlet to each of said cylinders, a valve in each inlet, a pair of cross heads of approximately semicircular shape reciprocable in said housing above said shoe, piston rods on said cross heads, pistons on said rOdS fitting within said cylinders, cross head guide members on the walls of said housing separating said cross heads, a motor in said housing, a crank shaft rotatable by said motor, crank arms on said shaft, and means reciprocable by said crank arms to move said pistons.

2. In a deep Well pumping unit, a housing', ,a

shoe at the lower end thereof, a plurality of cyli inders formed in said shoe, an inlet to each of said cylinders, a valve in each inlet, a pair of 'cross heads of approximately semicircular shape reciprocable in said housing above said shoe,. piston rods on said cross heads, pistons on said rods fitting within said cylinders, means to guide said cross heads, a motor in said housing, a set of reduction gears driven by said motor, a crank shaft rotatable by one of said gears, crank arms thereon, a connecting rod on each of said cross heads, and a pitman connected with each crank arm and operatively connected with one of said rods.

3. A deep well pump including a. housing, a plurality of cylinders at the lower end cf said housing, valve controlled inlets to said cylinders, pistons adapted to reciprocate in said cylinders,l piston rods thereon, a pair of cross heads slidable in said housing and connected with said piston `rods, atransverse guide plate above said cross heads, connecting rods slidable in said guide plate and connected with said cross heads, a

" closed chamber at the upper end of said housing,

an electricmotor housed therein, tubes extending longitudinally through said housing for 'the iluid being pumped, and means driven by said` motor to reciprocate said connecting rods.

4. In a deep well pumping unit, a housing, a closed chamber at the upper end thereof,'a motor/ in said chamber, a shaft on said motor projecting downwardly through the bottom of said chamber, fluid conducting tubes` extending longitudinallythrough said chamber about said motor, a gear train driven by said motor, a crank shaft rotatable through said gear train crank arms thereon, a pair of cross heads below said crank shaft and connected for reciprocation therewith, a plurality of pistons connected with each cross head, cylinders in lwhich said pistons reciprocate, fluid inlets to said cylinders, valves therein, and valve controlled passages through said piston.

5. A deep well pump\i`or oil including a housing, a plurality .of cylinders at the lowex end of said housing', pistbns in said cylinders. inlets to said cylinders from the well, valves in said inlets,V

opposed vertically arranged guide members on opposite sides'of said housing above said cylinders, approximately semicircular .cross heads separatedjby said guide members, piston rods connecting said cross heads and said pistons, a

crank 'shaft in said housing, means to rotate said crank shaft, and operative connections between said crank shaft and said cross heads, the oil from said cylinders having a passage upwardly between said cross heads and through said hous- 5 JoHN w`. CHAMBERS.

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