US1805441A - Deep well pump - Google Patents

Description

May 12, 1931. w. N. rSQUIR ES 1,805,441-

- DEEP WEL; PUMP I Filed Jan. 8, 1927 2 sheets-sheer 1 'fzqQZ May 12, 1931. w. N. SQUIRES DEEP WELL PUMP Filed Jan. 8, 1927 r 2 Sheets-Sheet 2 z/ gwuwnl'oz 5% 1425/?5 Patented '12, 1931 UNITED si'rA'rars eeann N. ZSQUIEB-ES, F HOIPLIN,

DEE]? PUMP Application filed January 8, 1927. Serial No. 159,896.

This invention relates to deep well pumps and more particularly to a deep well pump actuated by a pnlsator operated at the surface of the ground at or adjacent the well.

An important object of the invention is to provide in a device of this character a structure such that one of the lines connecting the pulsator with the pumping apparatus constitutes a discharge line for the liquid being no pumped.-

A further object of the invention is to produce a device of this character which may be very readily and cheaply manufactured, which will be durable and eflicient in service 5 and a general improvement in the art.

A still further object of the invention is to produce in a device of this character a controlling pulsator having means permitting one of the pulsation lines to act as a discharge for the liquid which is being pumped of such character that a full charge of the liquid is maintained toinsure transmission of the power of the pulsator to the pump.

These and other objects I attain by the construction shown in the accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein Figure-1 is a plan view partially in section of pumping apparatus constructed in ac-- cordance with my invention;

' Figure 2 is a side elevation thereof;

Figure 3 is an enlarged sectional view through the pump and the directly associated parts;

Figure 4 is a section 'on the line 4-4 of Figure 3;

Figure 5 is a section .on the line 5'5 of Figure 3. v

-Referring now more particularly to the drawings, the'numeral 10 generally desig nates a pump barrel disclosed as of the displacement type and having a piston 11 operating within the open-bottomed cylinder 13.

' The open bottom of the cylinder communicates with the intake chamber l l, which isprovided at the lower end of the barrel by enlarging the bore forming the cylinder 13 and applying to the lower end of the barrel a head 15. Thishead 15 has an inlet neck 16 havinga'bore 17 at the upper end and lower ends of which are arranged check valves 18 and 19 controlling upward movement of the liquid through the bore 17. The lower end of this inlet neck may be connected to a screen or stand pipe 20 extending into the fluid to be pumped.

The wall of the barrel 10 is provided with a plurality of vertically extending ports 21 which open through the upper end of the barrel and are check-valved at their upper and lower ends, as indicated at 22 and 23 respectively to prevent downward'passage of fluid through these bores. The cylinder 13 terminates short of the upper end of the bar- 55 rel and in the upper end of the barrel is axially arranged a packing gland 24 for packing off the rod 25 of the piston 11.

Arranged above and co-axial with the pump barrel is a power cylinder 26 which is openended and within which operates a piston 27 connected to the upper end of the piston rod 25. The cylinder 26 and barrel 10 are connected to one another by a coupling 28 providing a chamber 29 between adjacent 75, ends thereof, the open lower end being in communication with this chamber. The

. walls 30 of the cylinder 26 are provided with .open vertically extending ports 31 opposite ends of which open through the top and bottom of the cylinder wall. Connected with the outer wall of the cylinder 26 and with the inner wall thereof are conduits 32 and 33. These conduits are concentric and of a length, depending upon the depth of the well. At the top of the well, the inner conduit 33 is let out through the wall of the conduit 32, as indicated at 34. At the surface of the ground, a pulsator' is arranged comprising a crank shaft 35 having cranks operating pistons 36 within cylinders 37 and 38. This crank shaft may be driven in any suitable manner at present indicated as having geared connection at 39 with a drive shaft 40. The cylinder 38 is connected to the conduit 33, 5 while the cylinder 37 is connected to the conduit 32. Adjacent the cylinder 37, the conduit 32 communicates with an outlet conduit 40 through a valve 41 normally seated by a relatively heavy spring 42. This valve is opened by an eccentric 43 connected with the stem thereof by a strap 44, as the piston 36 of the cylinder 38 starts its power stroke or that stroke upon which it discharges the contents of the cylinder into the conduit 33 and holds this valve open throughout theduration of this power stroke. The discharge the column of fluid between this piston and the upper surface ofthe piston 27 Y moves downwardly, forcing the piston 27 before it.

The piston 11 is thus forced downwardly and since the check valves 18 and 19 are closed at this time, the fluid must pass upwardly through the conduits 21 by the check valves 22 and 23. As the piston 27 is moving downwardly, it is forcing any fluid which is in the cylinder 26 before it in the chamber 29 and fluid must accordingly pass from this chamber upwardly through the conduit 32. As the piston 36 starts its power stroke, the valve 41 opens and the excess fluid thus introduced into the conduit 32 and cylinder 37 is permitted to escape to the discharge. As the power stroke of the piston 36 of the cylinder 38 terminates and that of the cylinder 37 begins, the valve 41 is closed and the column of liquid is forced downward- 1y through the conduit 32 and ports 31 into the chamber 29. As the check balls 22 and 23 will now be seated, this fluid moves into the cylinder 26, forcing'the piston 27 upwardly and moving the piston 11 upon the suction stroke.

It will be obvious by use of this system, a single discharge conduit serves both as a pressure transmitting line and as the discharge line for the pump. The cylinder 26 at its lower end may be provided with means for limiting the downward movement of the piston 27, while its piston is still within the cylinder. Means 46 may be pro- .vided for introducing fluid under pressure 'to the conduit 33 to replace any leakage losses. By employing the same fluid in the conduits 32 and 33, intermingling of the pulsating column fluid with the fluid being pumped is not detrimental.

It may be seen that as the piston 11 de- 'scends during the working stroke there is ,created a region of reduced pressure between the top of the piston 11 and the top of it's cylinder. This region which is devoid of liquid is produced as a result of the displacement of the liquid within the cylinder 13 by the, piston 11 since the space above the piston is closed to the admission of liquid. As a result of this arrangement the amountof liquid that is forced through the discharge column upon the discharge stroke is equal to the amount of liquid displaced from the cylinder 26 by the downward movement of the piston 27. plus they amount of liquid displaced from the c linder 13 by the downward movement 0 the piston 11. The amount of liquid displaced by the piston 11 is equal to the volume of the space between the top of this piston and the top of its cylinder. In prior devices with which I am familiar'is has been customary to allow liquid from a chamber corresponding to the chamber 29 to flow into the. space between the top of the piston 11 and the top of its cylinder upon the descent of the piston. In

such arrangements the total amount of liq uid discharged through the discharge column during the discharge stroke of the pumping apparatus'is merely equal to the volume displaced by the piston 11 in its downward stroke for the amount of liquid displaced by the piston 27 into the chamber 29 would be exactly equal to the amount of liquid that would flow into the space created between the top of the piston 11 and its cylinder. Because the upper end of the cylinder 13 in my pump is closed no liquid can enter into the space evacuated by the piston 11 in its descent with the result that the amount of liquid discharge through the discharge column per stroke is increased by an amount equal to the space evacuated by the piston 11.

Since the construction hereinbefore setforth is capable of a certain range of change and modification without materially departing from the spirit of the invention, I do not limit myself to each specific structure ex-' cept as hereinafter claimed. I claim 1. In deep well pumping apparatus, a pair of aligned cylinders, a coupling connecting adjacent ends of the cylinders and maintaining the cylinders in alignment, valves controlling the introduction of fluid to the outer end of one of the cylinders and (lischarging said fluid to the connection between the cylinders, a discharge line communicating with the connecting coupling, the coupling engaging end of the last named cylinder being closed, and pistons in said cylinders connected for simultaneous movement, one of said pistons being a motor piston and the other being a pumping plston.

the discharge of the pump being external of the motor piston.

2. In deep well pumping apparatus, a pair of aligned cylinders, a coupling connecting adjacent ends of the cylinders and maintaining the cylinders in alignment, valves controlling the introduction of fluid to the outer' end of one 'of the cylinders and discharging said fluid to the connection between the cylinders, the coupling engaging end of the last named cylinder being closed, pistons in said cylinders connected for simultaneous movement, a pulsator having two cylinders adj acent'ends of the cylinders and maintain-- ing the cylinders in alignment, valves controlling the introduction of fluid to the outer end ofone of the cylinders and discharging said fluid to the connection between the cylinders, the coupling engaging end of the last named cylinder being closed, pistons in said cylinders connected for simultaneous movement, a pulsator having two cylinders one of which communicates with the coupling and the other of which communicates with the free end ofthe other of the cylinders and means co'ntrolled by the pulsator for relieving the connection between the coupling and the first named cylinder of the pulsator of excess fluids introduced thereinto.

4. In combination, a pulsator at the head of the well,a pump and motor device in the well, said pulsator and said device being connected by two concentric pipes, only one of which serves as a discharge pipe, said device comprising a double acting hydraulic motor element communicating with both said pipes, a single acting pump element, the discharge side of which communicates with one of said pipes and the other side of which is closed against communication with either pipe, and a discharge valve connected to said discharge pipe only for taking oii the liquid discharged on each discharge stroke of the pump element.

5. In combination, a double acting pul sator at the head of the well, a pump and motor device in the well, a pair of pipes con-. necting the pulsator and the device and containing liquid columns, said device comprising a double acting hydraulic motor and a single acting pump driven by the motor, the pipes being connected to opposite sides of the motor and the discharge of the pump being connected to one of said'pipes to discharge the oil pumped thereby through one of said liquid columns, the other side of the pump element being closed against communication with either column, and a let-ofi' valve connected to said last named pipe only for removing from the upper end of the column the oil pumped by said pump, the other column being undisturbed by the pump discharge. i

6. In a device of the class described, a motor cylinder having a central bore and longitudinal passageways between the bore and the outside of the cylinder, an inner pipe connection to the upper end of the bore, an

- outer pipe connection to the outside of the motor cylinder and communicating with said longitudinal passageways, one of said pipes "comprising a discharge path for the device,

therefor, a coupling between the cylinders providing a chamber communicating with the bore of the motor cylinder and with both sets of longitudinal passageways, a motor piston in the bore of the motor cylinder, a pump piston in the bore of the pump cylinder, a rod connecting saidpiston, an intake connection having an intake check valve, there being a pocket at the lower end of the pump cylinder providing communication between the lower end of said pump cylinder bore, the intake connection and the discharge passageways.

7. In a device of the class described, the combination of a motor cylinder having a longitudinal bore, a piston-in said bore, a pipe connected to one end of the bore, longitudinal outletpassageways along the body of the motor cylinder communicating at'one end with the other end of the bore, a second charge passageways, discharge checkvalves pipe communicating with the otherend of u rod closing one end of the pump cylinder,

the other end of the pump cylinder having valved inlet and discharge passageways, sai discharge passageways extending longitudi-' nally along the body of'th'e pump cylinder I externally of the bore thereof and opening at their upper ends into said other end of the bore of the motor cylinder.

8. The method of raising liquid from a depth which comprises balancing two separate columns of the li uid to be pumped at -sulistantially the depth from which liquid is to be raised, depressing one column and thereby raising the other column, and-simultaneously, by the depression of said one column, creating a void by displacing liquid from a predetermined space into the said other column, drawing off liquid from the said other column, then depressing the said other column to raise the first columnrand simultaneously filling said void.

9. In a deep well pumping apparatus, the

combination of a motor cylinder adapted to be disposed in the well, a motor piston therein, a hydraulic line extending from each end of the motor cylinder to the head of the well, one of said lines serving as a discharge line,

a pump operated by said motor piston, said intake chamber at the bottom of the casing,

and means at the bottom of the casing actuated upon the reciprocation of the columns for pumping liquid from the well into the chamber and discharging it from the chamber into one of the columns, said last means including a cylinder closed at one end against the entrance of liquid therein and a piston moved away from the closed end during the discharge stroke.

11. In adeep well pump, an outer casing extending to the bottom of a well, a motor element and a pump element at the bottom of the casing, means for reciprocating the elements to pump liquid from the well, and a chamber in the casing at the bottom of the well, said chamber being closed against the entry of liquid therein during the discharge stroke of the pump element and being increased in volume during the discharge stroke.

12. In a pulsator pump, a motor element, a pump element, connections between the two and means including a discharge column for reciprocating the motor element whereby the pump/element is reciprocated, the reciprocating system including means for creating a partial vacuum during the discharge stroke of the pump, the liquid displaced in creating the partial vacuum being discharged through the discharge column.

13. In a pumping system, the combination of a pumping device and a pair of hydraulic columns consisting of a power column and a discharge column in communication with the device, said device including a motor piston separating the columns and reciprocated by preponderance of pressure of one column over the other alternately and a liquid pumping member including intake and discharge check valves for passing liquid from the well into one of the columns, said liquid pumping member including a closed end cylinder and a piston therein, said latter piston moving away from said closed end by action of the power column upon the motor pistons to draw a vacuum in said closed end cylinder and to discharge liquid into the discharge column past said discharge check valve.

14. In a pumping system, the combination of a pumping device and a pair of hydraulic columns consisting of a power column and a discharge column in communication with the device, said device including a motor piston separating the columns and reciprocated by a preponderance of pressure of one column over the other alternately, a pump piston op erated by the motor piston, means including 15. In a deep well pumping apparatus wherein liquid is pumped by reciprocating two columns of liquid, a pump and motor device adapted to be disposed in the well and actuated by the reciprocation of said columns of liquid to impart an upward drift to one of said columns, said device including means for creating therein an exhaust-ed region of reduced pressure during one portion of the stroke of the device to assist in actuating the pump during a difi'erent portion of the stroke.

16. In a deep well pumping apparatus wherein liquid is pumped by reciprocating two columns of liquid, a pump and motor device adapted to be disposed in the well and actuated by'the reciprocation of said columns of liquid to impart an upward drift to one of, said columns, said device including means for creating therein an exhausted region of reduced pressure during one portion of the stroke of the device to assist in actuating the pump during a different portion of the stroke, and said device also including means for drawing liquid fronrt-he well to fill the space available upon the reduction of said region during the reverse stroke of the device.

In testimony whereof I hereunto aflix my signature.

VVILBUR N. SQUIRES.

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