US1528519A

US1528519A - Pump

Info

Publication number: US1528519A
Application number: US672278A
Authority: US
Inventors: Preston K Wood
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-11-02
Filing date: 1923-11-02
Publication date: 1925-03-03
Anticipated expiration: 1942-03-03

Description

Mar. 3, 1925.

, Filed Nov. 2, 1923 P. .K. wooD tPUMP 2 Sheets-Sheet l v Patented Mar. 3, 1925.

P NT OFFICE.

PRESTON K. woon, or LOS ANGELES, CALIFORNIA.

rum.

To a?! who: it may concern p 4 Be it known that I, Pnns'rox K. '001), a

citizen of the United States, residing at Los Angeles, in the county of Los Angeles .3 and State of California, have invented new and useful Improvements in Pumps, of which the following is a specification.

This invention relates to apparatus for pumping liquids.

H An object is to provide pneumatic, automatic pump apparatus.

' One of the objects of the present invention is to .provide a pump of simple construction I and of few operating parts and which operating parts are entirely automatic and are controlled and driven by an elastic motive fluid.

A further object is to provide a deep well pump of compact form so that it may be 0 readily installed in a well casing or well hole. a

Other objects and advantages will be made manifest in-the fo'llowing specification of an embodiment of the, invention illustrated in the accompanying cli afwing,wherein,

Fig. 1 is a vertical central section of one form.

Fig. 2-is a cross sectim on line 22 of .Fig. 1. I s

'Fig. 3 is a cross section on line 3-3 of Fig. 1. 1 1

Fig. 4 is a longitudinal central section of a'slightly modified form of the invention.

Fig. 5 is across SQQlJlQIl on:l-ine"'55 of 5 Fig. 1, and FigJGis a crds's section on'line 66ofFig.4. a

Fig. 7 is an elevation partial section of the apparatus arranged tontilize the well pressure. i j: s In the fornrot thei invention shown in Figs.-1;to13 inclusive, the pump is illustrated is disposed within a well W which may or may not have a casing C.

This form of the pump includes, a' main upper body portion 2 the upper end of which is threaded at 2 toreceive the contiguous section of an air line L. Within the body 2 is shown a valve seat 3 engaged by a suitable valve 4 which rests on the head 5 of a hollow piston valve including 'a connecting tube 5 passing down through an intermediate pump shell section 2 which is in "turn attached to the foot shell 2. The lower end of the piston tube 5 is attached to 5 a lower piston head 5 having a? closing end Application filed November 2, 1923. Serial No. 672,278.

ing screw 8- threaded in a. footbushing 9- niounted in the foot shell 2 of the pump casing.

ably mounted within the pump body and is normally thrust upwardly byythe spring 6 untilithe valve 4 closes 011 its seat 3 for the purpose of preventing, during operating, the upward passage of well liquid into the air line L. The pumpshell is provided in its lower portion with one or more liquid in-v lets 10 and when the piston is in its uppermost position as shown in Fig. 1 there registers with this inlet port 10 a port 10 in the piston body 5 so that under certain conditions oil or other liquid may flow into the hollow pump piston and rise toward the pistonhead which is provided with an air outlet port 11 shiftable into register with an air outlet port 11 in the pump shell head The apparatus provides for the utilization of air pressure as a means for operating the pump piston and to that end the air line L is connected to compressed air apparatus.

Air pressure is built up in the air line L above the valve 4 to a suitable degree after which the piston head is forced down until the head uncovers a port 18 leading into a side duct 14 which returns at 15 into the cylinder chamber. 'The upper portion of the piston is provided with a port 16 to register with the port 15 just described when sufficient air pressure has' accumulated upon the piston. A downward movement of the piston carries the. port 11 away from the port 11 thus cutting off escape to the vent pipe 12, and also carries the port 10? of the piston below the port 10 in the lower portion of the pump shell thus cutting off the liquid inlet.

Concurrently with the downward movement of the piston, a'port 17 therein becomes registered with a port 18 in the lower porthe unregistered ports 10-10".

' 11-11, the inrushing oil displaces the air tion of the pump shell and which leads into a discharge chamber 19 to which is connected a discharge pipe 20.

Means are provided to control the downward movement of the piston until a suitable pressure has accumulated in the air line L and over and above the upward thrust of the spring 6. Such means includes a friction device which may be in the form of a ball 21 engaging a cam surface 22 providedon the exterior surface of the piston; in this case provided in the lower portion 5*. The pressure ball 21 is thrust against the piston by a spring 23, the pressure of which is variable by a nut or plug 24-threaded into the piston body, as clearly shown in Fig. 1.

The operation of this form of the device is as follows:

When the equipment is lowered bodily into a well hole, the spring 6 thrusts the piston up to seat the valve 4 with a predetermined pressure, saypounds, and the friction device 21 is set up to create an additional pressure, say 25 pounds, under the action of the spring 23. Initially, the inlet ports 10-10 are in open registering position and the liquid in the well will pass into the hollow piston and thence up, and will discharge trapped air through the air vent pipe 12 while the ports 11-11 are in register. In this initial position the port 16 of the piston and the port 17 thereof are out of register with their respective ports 15 and 18. Air pressure then being turned into the'air line L will accumulate until it is sufficient to overcome-the spring 6 and the spring 23, whereupon the piston will be moved down; the air vent ports 1111 will be separated to cut olf outlet, and as the piston head 5 uncovers the port 13 air will flow past the valve 4, through the duct 11 and through the registered ports 15 and 16 into the hollow piston and react upon the oil contained and trapped in the piston by The re.- sult is that the air pressure directly on the oil forces theoil from the hollow piston out through the registered ports 1718 and through the chamber 19 and into and from the discharge pipe 20 until the discharge of oil reduces load on spring 6 to such a degree that this is enabled to return the piston valve. The result is to again close the valve 4 on its seat 3 and register the ports-- 10-10 to open the oil inlet into the piston and also to register the air vent ports in the piston through the air vent until such time as the air pressure on the valve 4 is sufficient to repeat the downward movement of the piston valve when the above de-.

scribed discharge of oil agairgtakes place.

It is obvious that the pump is therefore of intermittently acting operation in the forcing of the oil through the discharge by the action of air pressure on the pump valve and on the oil.

A slightly modified form of the invention is shown in Figs. 4 to 6 inclusive, wherein the pump includes a pump tube 25 having attached to its lower end a foot fitting 26 with oil inlet ports 10. In this fitting is slidably mounted a piston part 5 having a closure 5 at its lower end and this piston is thrust upwardly by its spring 6,the lower end of which is seated on the follower 7 and which is adjustable by the screw 8, this being mounted in the foot bushing 9. The piston 5 has ports 5 which inthe lower position of the piston register with orts 18 providing for discharge into the clamber within the pump tube 25.

The piston part 5" is attached to a piston barrel 5 having at its upper end a piston head 5, this being-provided with an air port 16 to register in its lower position with the lower end of a lateral air passage 14.- provided in a head section 2 connected to the air line L through which compressed air is forced to depress the piston structure 5 with the result that compressed air will pass into the air passage 14 and thence into the hollow piston barrel 5.

This barrel is shown as perforated at 5 so that fluid may pass from the piston barrel 5 into the space within the connecting tube 27 which connects the lower pump body 26 with the head body .2.

The piston head 5 has an air outlet port 11 leading into an air vent passage 11. in the head 2 and from which may extend upwardly the vent pipe 12.

In addition to the upward pressure of the spring 6 on the piston structure there is a resistance offered by a friction device or ball 21 engaged by a spring, 23 pressure-of which is variable by a screw 24,'these parts being arranged compactly in a side portion of the pump section 26.

In operation ofthis form of the pncu matically operative pump, when the parts" are in the position shown in Fig. 4, liquid in the well passes through the inlet ports 10 into the piston and section 5 and thence rises in the barrel 5 and the tube 27 and upwardly toward the piston head 5 concurrently dispelling the air through the outlet vent 11". cumulatin'g in the air line L and this even tnally-overcoming the resistance of the spring 6 and the friction device 21 hearing on the piston structure, forces the piston down until Meanwhile air pressure is acthe pump tube 25 and discharging at the top thereof. When the head of liquid in the discharge pump tube is overcome by the spring-6 then the piston valve again moves up and cuts off the air passage 14 and the liquid flows in through the inlet ports 10.; This action is repeated intermittently 1n the charge of the oil without a pumping means. My invention therefore includes a pumping mechanism in which there is a gas wellfluid pressure line extending up sufliciently in the well to be above the liquid level, and therefore the natural gas pressure in the well is made effective by accunmlating action on the piston in the pump to operate the same and therefore to discharge the liquid through the discharge conduit. In Fig. 7 the apparatus is shown as combined with a well having a casing C with a head H provided with an oil outlet or discharge D and with a gas vent 12 The fluid pressure line L is shown as extending up in the casing to a level, well above the liquid level so that gas pressure accumulating in the well above the liquid can act down through the line L upon the pump piston and operate this so as to open the port 14 and allow thewell pressure to exert itselfupon the liquid within the pump body. It will be seentherefore that in wells where there is a low gas pressure this may-accumulate intermittently-and shift the piston and act to discharge'well liquid. l

As shown in Fig. 1 the air vent 12mm" have a check valve 12 which is designed to automatically open should a head of liquid" accumulate in the pipe 12 so that this liquid may escape back into the well; thecheck valve automa ically closing when apartial vacuum is created in the pipe 12 as when this is connected to the suction side of a pump indicated at- P.

It will be observed that thereis a differential diameter between the head of-the piston 5 and the port in the seat 3 or part against which the head is thrust by the spring 6.

line, then as soon as the accumulated Assuming that ten square inches of piston head is exposed in the port of the pressure sure is suflicient to force the piston lead away from theport, there becomes effective the total area of the piston head, which may be, for instance, 25% greater than the area exposed at the port, so that the pressure will be effective on a greater area of the piston. By reason of the increased effective area of the piston head when lowered from its seat,

.require a proportionate reduction i of res it will require a proportionately greater resistance on the part of the spring to return the piston to the closing position, and will pressure in the pipe line L. L

It will thus be seen that I have provided in a pump, means for alternately causing an aceumulatmn of fluid pressure to discharge liquid in one period and for venting trapped fluid aftersuch discharge and while liquid is entering the pump inlet in another period.

Further embodiments, modifications and variations may be resorted to within the principle of theinvention;

What is claimed is:

1. In a pump apparatus. a pump body structure adapted to be bodily disposed in awell, an expansive fluid pressure supply line attached to the pump body, an air ventleading from thepump body, a liquid inlet leading into the pumpbody, a liquid discharge leading from the pump body and a liquid discharge means to receive liquid discharged from the pump, a yieldable piston valve slidably mounted in the pump body and having a liquid inlet port to register with the aforesaid port and a liquid outlet port to register with the said outlet port; the piston having an. air vent port to register with the aforesaid vent, said pump body having a ported air passage leading from the chamber in which the piston valve operates,. said passage being uncovered by movement of the piston valve under motive fluid pressure,said piston valve being hollow and having an air inlet port to register with said passage whereby fluid pressure from said-line may enter the piston and operate to discharge liquidWhen the discharge "ports are in register. a 2. In a pump apparatus, apump body structure adapted to be bodily disposed in a well, an expansive fluid pressure supply line attached to the pump body, an air vent leading from the pump body, a liquid inlet .leadiiig into the pump body, a liquid discharge leading from the pump body and a liquid discharge means to receive liquid discharged from the pump, a yieldable piston valve slidably mounted in the pump body and having a li uid inlet port to register with the aforesald port and a liquid outlet'po'rt to register with the said outlet port; the piston'havin'g an air vent port to register with the aforesaid vent, said pump body having a ported air passage leading from the chamber in which the piston valve operates, said passage being uncovered by movement of the piston valve under motive fluid pressure, said piston valve being hollow and having an air inlet port toreg- .i'Ster-with said p g whereby fluid pres sure from said line may enter the piston and operate to discharge liquid when the discharge ports are in register, and means discharge leading from the pump body and a liquid discharge means to receive liquid discharged from the pump, a yieldable piston valve slidably mounted in the pump body and having a liquid inlet port to register with the aforesaid port and a liquid outlet port to register with the said outlet port; the piston having an air vent port to register with the aforesaid vent, said pump body having a ported air passage leading from the chamber in which the piston, valve operates, said. passage being uncovered by movement of the piston valve under motive fluid pressure, said piston valve being hollow and having an air inlet port to register with said passage whereby fluid pressure from said line may enter the piston and operate to discharge liquid when the discharge ports are in register, and adjustable means for controlling the yielding resistance ofthe piston valve.

4. In a pump apparatus, a pump body structure adapted to be bodily disposed in a well, an expansive fluid pressure supply line attached to the pump body, an air vent leading from the pump body,a liquid inlet leading into the-pump body, a liquid discharge leading from the pump body and a liquid discharge means to receive liquid discharged from the pump, a yieldable piston Valve slidably mounted in the pump body and having a liquid inlet port to register with the aforesaid port and a liquid outlet port to register with the said outlet port; the'piston having 'an air vent port to register with the aforesaid vent, said pump body having a ported air passage leading from the chamber in which the piston valve operates, said passage being uncovered by movement of the piston valve under inotive fluid pressure, said piston valve being hollow and having an air inlet p port-to register with said passage whereby fluid pressure 'from said line may enter the piston and operate to discharge liquid when the discharge ports are in register, means for controlling the yielding resistance of thevpiston valve, and an auxiliary friction device operating on the piston to control its movement.

5. Ina pumping apparatus, a pump body structure adapted to be disposed in a well,

said body having at its upper portion an air vent and an air passage and having at its lower portion liquld inlet portsand li uid discharge ports; a hollowpiston va ve slidably fitting" in the pump body and having at its upper end an air port to register with the said Vent and an inlet port to register with said passage, and having at its lower end ports to register with said inlet ports and ports to register with the said discharge ports, a discharge conduit to receive discharged liquid, means for supplying motive fluid to operate the piston and in, one position of the piston to expel liquid from the pump into the discharge line, and means for automatically shifting the piston in one direction when the dis charged load is overcome.

6. Means for utilizing well gas pressure to discharge well liquid from a well, comprising in combination a pump structure adapted to be submerged in the liquidin a well, said pump having a liquid discharge conduit, and having liquid inlet and outlet ports, the latter leading to the conduit; a piston valve in the pump for controlling the said ports, said pump having a gas vent leading to the top of the well and having a by-pass for-gas, said piston acting to cover and uncover the vent and the bypass, and a gas line extending upwardly from the pump so as to, receive well gas and through which the gas becomes active inter mittently on the piston valve to shift the same and to discharge well liquid from the P p- 7. A deep well pump for utilizing gas pressure in a well, comprising a pump structure adapted to be submerged in the well liquid, liquid inlet and outlet means for the pump, a gas vent leading to the top of the'well from the pump, a discharge con- J for controlling liquid inlet and discharge,

and a gas line extending upwardly from the pump to supply gas well pressure to the piston, whereby to operate the piston and become directly effective upon the liquid in the pump to discharge the same.

8. A deep well pump for utilizing gas pressure in a well, comprising a pump structure adapted to be submerged in the well liquid, liquid inlet and outlet means for the ump. a gas vent leading to the top of the well from the pump, a discharge conduit leading to a point of discharge for the well liquid, a piston valve in the pump for controlling liquid inlet and discharge, and a gas line extending upwardly from the pump to'supply gas well pressure to the piston, whereby to operate the piston and become ,directly effective upon the liquid in the pump to discharge the same, and means reacting on the piston valve after a discharge action to shift the same to cut oil the pressure of the gas acting on the liquid in the pump until the pressure is re-built.

9. A deep Well pump comprising a body structure adapted to be submerged in the well liquid, said pump having inlet and outlet liquid ports, a gas vent extending from the pump to a point of discharge, a gaseous pressure line connected to the pump, a gas bypass in the pump, and a piston valve yielding-1y thrust to close the liquid outlet and the gas by-pass and open the vent, said piston being exposed to pres sure in 'the gas line whereby the piston is movable in one direction by gas pressure to close the vent and oil inlet port and open the by-pass and the oil outlet port.

10. A deep well pump comprising a body structure adapted. to be submerged in the Well liquid, said pump having inlet and outlet liquid ports, a gas vent extending from the pump to a point of discharge, a gaseous pressure line connected to the pump, a gas by-pass in the pump, and a piston valve yieldingly thrust to close the liquid outlet and the gas by-pass and open the vent, said piston being exposed to pressure in the gas line whereby 'the piston is movable in one direction by gas pressure to close the vent and oil inlet port and open the by-passand the oil outlet port, the pis ton being hollowed and having .a port communicated with theby-pass'in one position so that gas pressure becomes-eflective upon the liquid in the pump to discharge the same, the pump having a discharge conduit to receivet-he discharged liquid.

11. In combination, a pump structure adapted to be submerged in. well liquid, a

piston valve operative in the pump struc.-.

ture to control inlet and discharge of well liquid, a fluid ressure line attached to the pump for supp ying fluid pressure to shift the valve in one direction, said pump having a pressure fluid by-pass-and having a vent with a check valve, said'piston controlling escape at the vent and fluid flow at the bypass, means for shifting the piston in a contrary direction to the ressure-fluid, and a means for establislung a' partial vacuum in the vent pipe. v

12. In an automatic liquid pump, a pump structure adapted to be submerged in liquid to be pumped and having liquid inlets and outlets, and having a motive fluid vent anda motive fluid by-pass; a valve device in the pump for concurrently closing the liquid. inlet and the vent and opening the liquid outlet and the by-pass to permit motive fluid to discharge liquid from the pump, and. a means for holding the valve device in check until pressure of motive fluid is built up and becomes operative to shift the valve to effect a discharge of liquid.

13. Incombination, a pump structure adapted to be submerged in well liquid, a piston valve operative in the pump structure to control inlet and discharge of well liquid, a fluid pressure line attached to the pump for supplying fluid pressure to shift the valvein one direction, said pump having a pressure fluid by-pass andhaving a" vent with a check valve, said iston controlling escape at the vent and uid flow at the icy-pass, means for shifting the piston in a contrary direction to the pressure fluid,

and a means for establishing a partial vacuum. in the vent pipe, the piston valve having a head area greater than the port area from the pressureline, whereby a differential action under line pressure is efi'ective against said shifting means.

' 14:. -A' system for utilizing natural gas pressure to discharge well liquid from a well, comprising a dischar e line from the well, a submersible pump body to the outlet of which said line is connected, inlet means for well liquid to said body, a conduit for leading .well gas to the chamber of the pump body, a gas vent conduit from said body, and means, operativeby the pressure of the well gas, for controlling the action of the natural as pressure in the pump for eflecting a disc arge of liquid thereby from the pump.

In testimony whereof I have signed my name to this specification.

PRESTON K. WOOD.