US1767880A - Deep-well pump - Google Patents

Description

June 24, 1930- E, s. GRAFENsTA-'r'r DEEP WELL PUMP Filed Oct. 18, 1927 2 Sheets-Sheet l gums! June 24, 1930.

E. S. GRAFENSTATT DEEP WELL PUMP Filed Oct. 18, 192'? -2 Sheets-Sheet 2 INVENTOR.

`lPatented June 24, 1930 y UNITED STATES EMIL S. GRAFENSTATT, F LOS ANGELES, C'ALIFOBNiIA DEEP-WELL PUMP Application led October 18, 1927. Serial'No. 226,933.

This invention relates to deep well pumps, and the main object is to provide an. improved type of pump adapted to be operated by a pressure element, and so arranged for producing a substantially continuous discharge of the well fluid `by reason of the fact that fluid is discharged on both the up and down strokes of the pump plunger.

In the consideration of my present invention, attention is called to my pending application for patent for deep well pumps filed March l0, 1926; Serial Number 93,576, compared with which the present invention embodies material improvements in structure, operation and utility.

Another object is to provide a deep well pump embodying a mechanism which ma be readily assembled and disassemble which will be free from unnecessary parts i 2o and extremel simple in operation.

In my sai pending application for pati ent, and in othertypes of deep well pumps, means was employed for providing a pressure zone between the pump .barrel and the well casing for `effecting the operation of the pump, whereas in my present invention it is an object to provide a self-contained pump exclusive of the pressure zone .or chamber, and adapted to be connected with a pressure mechanism above the surface of the ground, so that the entire pump mechanism may be positioned at a greater depth in the well casing and preferably within the perforated portion of said caslng.

In my former type of pump, as well as in other pumps such was impossible, due to the fact that a pressure zone was of necessityl maintained in the well casing and around the pump barrel. rlhe structure embodied in the present invention being selfcontained as to all of its elements, facilitates the insertion and withdrawal of the pump bodily.

A further object is to provide means whereby the flow pipe with the attendant valves may be lowered intothe central casing and into operative relationship with the pump barrel after the pumping mechanism has been properly positioned in the well.

A more detailed statement of objectsof the present invention will be made as the description of myinvention progresses.

In the accompanying drawings I have shown a referred embodiment of m invention, subject to modification Within t e scope of the appended claims without departing from the spirit thereof.

In said drawings:

Fig. 1 is a sectional elevation, in perspective, of a pump embodying vmy improvements and dis-associated from the well casing. In this view the relation of the several parts of the pump is such that the pressure is applied to the lower side of the power head during the upward movement of the plunger.

Fig. 2 is' a fragmentary sectional elevation of the upper portion of the ump, showing the flow pipe and the chec and head valves immediately above the structure 7G shown in Fig. 1.

Fig. 3 is a transverse section of the pump on line 3 3 of Fig. 2.

Figs. 4 and 5 are transverse sections of the pump, respectively, on lines 4 4 and 75 5-5 of Fig. 1.

Fig. 6 is a slightly enlarged fragmentary sectional elevation of the upper portion of the pump shown in Fig. l, with the power head and control valve shown in positionsv 30 such elements assume at the initiation of the up stroke of a plunger.

Fig. 7 is a similar sectional elevation ofk the same, in which the power head and control valve are shown at their uppermost positions within the pump barrel, in readiness for an ensuing down stroke of the plunger.

Fig. 8 is a sectional elevation of a well, showing connections above the ground with a pressure pump and storage tank, by means of which pressure is maintained in the pump for the operation of the pump, and contents of the well are stored for further disposition.

Referring first to Fig. 8, W represents the usual well casing which extends to a point above the ground and' is provided with a head W thereon; C represents a pump casing which maybe fitted into the central -the portion 1 of the well casing head W', and provided with an inlet 2 arranged for connection with a pipe 3 which leads to and is connected with the exhaust 4 of a pressure pump 5. F represents a fiow plpe which extends through a portion 6 of the casing head W and through a packing land 7. The upper end of the flow pipe is adapted to be connected by means of a pipe 8 with a storage tank 9. Said tank and the pressure pump 5 may be connected by means of a pipe 10.

Thus a pressure zone is provided wlthm the pump casing C and around the How pipe F, while the contents of the well are discharged through the flow pipe F and pipe 8 into tank 9.

The pressure pump 5 draws the fluid from the tank 9 through the pipe 10, and discharges it through pipe 3 into the pressure zone for effecting the operation of the pump as hereinafter described.

Briefly described, the pump proper includes a barrel which is composed of alined sections B and B', which are screwed together at 11. The upper section B is attached to the lower end of the pump casing C, and the lower end of the barrel section B is provided with a reduced tubular extension I) which is screwed to the end of the section at 12.

The barrel is provided with tubular liners A and A which have correspondingly beveled and closely fitting ends 13, providing a leak-proof joint.

Said liners form cylinders in which a power head D and a control valve E reciprocate.

The upper portion of the .barrel section B is provided with a liner a which telescopes into and rests upon the upper end of the liner section A, as shown in Fi 1, and slidably receives the head G of a ho plunger g. This hollow stem plunger is threaded at its lower end into a piston H which operates in aliner a in the lower section B of the barrel.

Said piston has upwardly and downwardly extended hollow stems H and L, respectively, in a liner h which is supported in the lower section b of the barrel. The liner a rests upon a removable collar b which is threaded into the lower end of section B of the barrel.

The upper section B of the barrel is provided with a longitudinal passage 14 of h arcuate cross section, which communicates at its upper end with the chamber 15 in the upper end 16 of the barrel, which is adapted to be screw connected with the pump casing C, so that pressure from the pressure mechanism above the ground may be maintained Iin the passage 14. Y

Said passage 14 extends downwardly into section B to a point above and is closed vcontrol valve E. low stem j and the stem la. is slidably held at its lower end by means of an arcuate rib 17 which is positioned below the lowermost extreme of action of the control valve E. Diametrically opposite the passage 14 in the barrel section B, a similar passage 18 is provided which terminates above and is closed by an arcuate rib 19 positioned near the upper end of the control valve E. The passage 14 is continuously employed as a pressure chamber, while the passage 18 is continuously employed as an exhaust chamber.

Below the rib 19 a passage 20 is provided, which conforms substantially in cross section to the passage 18 and is alined therewith, and is in communication below the plane of the rib 17 with a circular passagev 21. The circular passage 21 terminates above a shoulder 22 in the lower portion of barrel section B and serves alternately as a pressure and exhaust chamber.

aid passage is in communication with the chamber 23 in the liner section a. below the piston H, by means of one or more ports 24 formed in said liner section, so that pressure from the passage 21 lnay be applied to the lower end of the piston H for moving the piston and the plunger head G upwardly and for the purpose of exhausting the flui from the chamber 23 when saidpiston and I plunger move downwardly.

It will be noted that the upper end of the liner w telescopes the lower end of the liner A substantially in the plane of the junction between the barrel sections B and B, ro-

vviding a chamber 25 within the liners A and a and between the upper end of piston H and the lower end of control valve E.

Communication is established between the c chamber 25 and the pressure zone` 14 by means of one or more ports 26 formed in the liner section A at a .point below lthe The power head D has annular end portions D and al, separated therefrom by waist portions 27 and 27', respectively, which are of substantially smaller diameter than the bore of the liner sections Aj and A thus providing chambers 28 and 28 inter-y mediate the power head.

The power head is slidably mounted on the plunger stem g andlhas Va depending sleeve d from the lower end thereof, embracing said plunger stem, on which the control valve E is slidably mounted for differentill operation with respect lto the power The -lower end of the sleeve d of the power head carries a collar 29 which is held thereon by means of a split ring 30 adapted to seat in correspondingly formed grooves on the interior of the collar and the exterior of the sleeve, as shown in Fig. 6.

It will be observed by reference to Fig. 6 particularly, that a chamber 31 is provided above the portion D of the power head and above the head Gr of the plunger, within the liner section A. Saidchamber is of substantially greater area than chamber 32 in said liner, which is formed between the portions D and D of the power h'ead around the waist 27 thereof.

The upper portion of the liner A is provided with a plurality of peripheral ports 33, 33, which register' with an opening 34 of substantial arca; formed in the inner wall 35 of barrel section B, for affording com-l munication between the chamber 31 and the pressure zone 14. Chamber 32 also communicates with the pressure zone 14 by means of ports 3G formed in the inner wall of the barrel section B and in the liner A.

Intermediate the power head sections D and d and around the,Waist portion 27 a chamber 37 is provided in the liner section A', which is of substantially less area than the chamber 32. It will be observed in this connection that when the power head reciprocates in the liners A and A', the chambers 32 and 37 will change positions.

For instance, as the power head D moves upwardly in the liner A, the port 36 will be closed while a port 38 formed in the lower portion of liner A and the inner wall 35 of the barrel will be opened. Thus the chambers 32 and 37 will be alternately open and closed to communieation with the pressure zone 14 during the reciprocation of the power head. i

As shown in Fig. G, the power head D is at rest 'at its lower-most extreme of action',l with the lower beveled edge of the portion I) resting upon the upper beveled end of the lowermost liner section A. When the power head is so positioned the valve E is in abutting position with the power head, yas shown in Fig. 6. l

The exhaust chamber 18 communicates at its lower end with an annular chamber 39 and with the valve chamber 40 within the liner section Aby means of one or more ports 41 formed in the periphery of the liner. The movement of the valve E serves to open and close said ports when the upper end portion E thereof is moved upwardly and downwardly during the operation lof the pump.

The control valve has a lower portion c spaced from the portion E by means of a central waist portion c around which a chamber 42 is formed within the liner section A. The upper portion of chamber 21 terminates in an annular chamber 43 which communicates with the chamber 42 by means of one or more ports 44.

Said chamber 42 also communicates with the pressure zone 14 by means of 011e or more ports 45 formed inthe liner A which are adapted to be opened and closed by means of the lower portion e of the valve.

The stem d of the power head has a port 46 therein immediately below the portion d.'

The upper end of the control valve is provided with a plurality of abutments 47 for engagement with the lower end of the power head, so as to provide an opening between the valve and power head in registration with the port 46, when the valve and power head are in abutting relation, thus permitting the leakage or bleeding ofthe pressure between these elements, as more particularly described hereinafter.

' Other ports 48 are provided in the liner A for affording communication between the chamber 43 and the arcuate passage 2l. Preferably a plurality of the ports 45 are provided, as shown in Fig. G, around the wall of the liner A, so that certain of said ports will communicate with a peripheral passage 49 formed in the exterior of the liner A. The passage 49 communicates with the interior of the liners below the portion e of the control valve by means of a port 50.

Ports 51 and 52 are provided in the inner wall 35 of the barrel B, and similar ports are provided in the liners A `and A respectively, which register with said ports for affording communication between the interior of the liner and the exhaust passage 18at different points.

The head of the plunger G is provided with a ball valve I within a cage z', which has a hollow tapered nipple 53 held in the upper end of the plunger, as shown in Fig. 1. 'lhe head E of the plunger and valve cage or body z' reciprocate within the liner a. rI`he upper end of liner a has an enlar ement 54 which rests upon a shoulder 55 ormed internally of the wall 35 of barrel B.

It will be noted by reference to Fig. 2 that the innerwall 35 of the barrel terminates at a point slightly below the upper 'end 16 of the barrel, and said wall has a counter-bore 56 which receives a sleeve 57 above the upper end of the liner a. Said sleeve has a tapered bore 58 to receive and hold a correspondingly tapered portion 59 of a valve body y', in which a head valve J is positioned.

The chamber 6() of the valve body j communicates with the chamber 6l of the liner a by means of an inlet 62 and the opposite end of the valve body has an outlet 63 which communicates with the chamber 64 of a check valve r, which carries a valve h therein.

The valves J and K are of usual form and are alined with the pump mechanism below, so that the fluid from the well may be discharged therethrough into the flow pipe F, which is adapted to be threaded into the upper portion 65 of the valve body la.

In operation, the pump mechanism shown and described herein is adapted to be submerged in the Well 'iuid within the casing shown in Fig. 8, the pressure fiuid which is employed for operating the pump will fill the pressure chamber 14 which is in communication with chamber 31 in the liner A, above the power head through ort 33, with chamber 32 around the waist 2 of the power head through port 36, with chamber 25 in the liner a above'piston H through port 26, below valve section e, with chamber 23 in liner a below the piston H through pressure zone 14, port 45, chamber 42 around waist of the valve, port 48, passages 20 and 21 and ports 24.

Thus due to the fact that the lower side of piston H has a greater area than the upper side thereof, an upward movement of the plunger is effected. This upward movement will continue until the stem H of piston H engages vthe end of sleeve al of the power head and the collar 29 on said sleeve engages the lower end of the control valve E for moving said valve upwardly until the annular end portion e la s port 45. In this position, due to the di 'erential travel of power head D with relation to valve E, communication between chambers 14 and 32 is closed inasmuch as power head D will lap port 36.

Communication between chambers 32 and 18 however, is established by the opening of port 51, thus making chamber 32 a low pressure chamber, and, as power head portion d laps port 52 communication is closed between chambers 18 and 37, communication is established between chambers 14 and 37 by the opening of port 38, thereby creating a high pressure zone in chamber 37. The upward movement of power head D and valve E continues until the upper portion D of the power head reaches a point near the upper end of chamber 31 in liner A.

When valve E reaches its uppermost position communication is established between passage 18, port 41, chamber 42, ports 45, passages 20 and 21, port 24, and chamber 23, thereby creating a low pressure area below piston H. Thus the greater pressure on the upper side of piston H will cause a downward movement of said piston and plunger head G. The down stroke will continue until plunger head G engages the upper end of power head D and until the lower end of said power head engages upper end of valve E and moves said valve downwardly for closing communication between chambers 18 and 42 by valve section E', lapping port 41. In such a position power head D will have closed communication between chambers 37 and 14. by lapping port 38, and communication will have been established between chambers 18 and 37 by the opening of port 52, thereby making 37 a low pressure chamber. 'l

Communication between chambers 32 and 18 is closed by section D lapping port 51, and communication between chamber 32 and 14 is established by opening of port ,36, thereby making chamber 32 a high pressure zone. Thus downward movement of power head D and valve E is continued until the lower edge of power head D rests on upper end of liner A', as shown in Fig. 6. Thus, a complete cycle of operation is effected.

As the piston H movesV on its up-stroke, the plunger G and its stem g, together with the stems H and h of the piston, being filled with production fiuid from the well, and chamber 61 below the valve J being likewise filled with the fluid, the valve J will be forced upwardly into the position shown in Fig. 2 as the valve I moves upwardly with the plunger, thus discharging the column of fluid above the valve I into the flow pipe F, through the valves J and K.

On the down stroke of the plunger, valve J will seat over and close the port 62, while valve K will remain open due to the pressure from the exhaust chamber 18, which discharges through port 66 and Valve bodies j and lc into flow pipe F. On said downward movement of the plunger, the valve I will open to admit from the interior plunger g into the chamber 61- of the liner a.

Thus it will be noted that while the well fiuid is discharged only on the up stroke of the plunger, and the down stroke of the plunger effects a displacement of the pressure fiuid, pressure will be created in the iow pipe on both the up and down strokes so as to effect a substantially continuous llow of fluid from the well pump to the outlet.

The fiow of the oil from the well sands is substantially the same on the up and down stroke, for the reason that on the up stroke of the plunger a volume of fluid from the well, proportionate to the area of the piston stem h is moved upwardly with the plunger, and as the plunger moves downwardly, due to the fact that the head G of the plunger is of substantially greater area than that of the piston stem L, a volume of fluid is moved upwardly through the plunger to compensate for the difference in area. The column of fluid in the How pipe is sustained on the valve J when the pressure is relieved from below and within the chamber 61 of the liner a.

It will be observed that I have provided a simplified pump, by means of which the production from the well is discharged in a direct path from the well to the fiow pipe. The arrangement of the power head, and particularly the control valve is such that the valve is not exposed to contact with the sand content ofthe production fluid.

A further important feature and improve# ment over other pumps consists in the tandem arrangement of the control valve and power head in telescopic relation to the plunger, which also serves as a flow pipe andda direct outlet from the `well for the These features are importantfor the reason that the production fiuid is not diverted through circuitous ports, passages and chambers and because of this fact a substantial reduction in frietional losses is attained.

What I claim is: l

1. A deep well pump comprising a barrel, a pump cylinder therewithin providing separate pressure and exhaust chambers externally of said c linder, a hollow plunger centrally mounte in said cylinder and adapted to receive the contents of the well, a flow pipe in communication with said cylinder and the interior of said plunger for discharging the contents of the well, a valve mechanism intermediate said plunger and said flow pipe for controlling the out-put ot the well, a pressure mechanism connect-ed with said barrel for maintaining pressure externally of the flow pipe and in said pressure chamber, a tandem arranged power head and control valve embracing said plunger, means formed on said power head and said control valve and cooperating with ports formed in said barrel for affording communication between different portions of said cylinder and said pressure and exhaust chambers for alternatelyapplying pressure to opposite ends of said power head, said control valve serving to regulate the application of pressure to said plunger, said plunger, power head and control valve being differentially connected, for the purpose described.

2. A deep well pump including a barrel, a hollow plunger thereln, a flow pipe alined and connected with said plunger, a power head slidable on said plunger and within said barrel, a control valve slidable on said power head and within said barrel, a piston on said plunger below said control valve, and a head on said plunger above said power head, separate pressure and exhaust passages in said barrel externally ofil said power head and control valve, a pressure mechanism connected with said pressure chamber, said exhaust passage connected with saidV flow pipe, and means formed in the barrel for applying pressure to opposite ends of said piston and to opposite ends of said power head on alternate strokes of the pump, for regulating and effecting a substantially c'on-` tinuous discharge of tiuid from the fiow pipe.

3. A deep well pump comprising a barrel having an inner and an enter wall with separate pressure and exhaust passages formed therebetween, said inner wall forming a pump cylinder,ra pressure mechanism connected with said pressure chamber, a flow vpipe connected with said cylinder, a plunger in said cylinder in communication with and for receiving .the ncontents of the well, a power head in the upper portion of saidv cylinder and embracing said plunger, and having a tubular stem depending therefrom, a' control valve embracing said stem and positioned in said cylinder below said power head, a head on the plunger above the power head, a piston on said plunger below said control valve, and means for applying pressure to'opposite ends of said piston and to opposite ends of said power head for reciprocating said plunger, said power head, and said control valve within said cylinder to regulate and effect the discharge of a fluid from said fiow pipe.

4. A deep well pump comprising a barrel having an inner and an outer wall with sep-` arate pressure and exhaust passages formed therebetween, said inner Wall forming a pump cylinder, a pressure mechanism connected with said pressure chamber, a flow pipe connected with said cylinder, a plunger in said cylinder in communication with and for receiving the contents ot the well, a power head in the upper portion ot' said cylinder and embracing said plunger, and having a tubular stem depending therefrom, a control valve embracing said stem and positioned in said' cylinder below said power head, a head on the plunger above the power head, a piston on said plunger below said control valve, means for applying pressure to opposite ends of said piston and to opposite ends of said power head for reciprocating said plunger, said power head, said control valve in said cylinder to regulate and effect the discharge of a fluid from said fiow pipe, said means including ports for affording communication between said cylinder and said pressure and exhaust chambers, and means for effecting simultaneous and independent movement of said plunger, power head and control valve on opposite strokes of the pump, for the purpose described.

5. A deep Well pump comprising a pump casing, a flow pipe centrally mounted in said casing, a barrel connected with said casing and provided with separate pressure and exhaust chambers therein, a pressure mechanism connected with said'casing and with said pressure chamber externally of' said flow pipe, liners in said barrel forming a pump cylinder, a hollow plunger reciprocable in said liners and provided with substantially spaced head and piston portions in the upper portion of the cylinder, said piston haying a passage to permit the flow of a liquid therethrough, a control valve reciprocably mounted on a portion of said power head and also embracing said plunger and Ipos1- tioned in the lower ,portion of said cylinder above said piston, ports connecting said cylinder with said pressure and exhaust chambers, other ports connecting said pressure chamber with the lower portion of the barrels' for applying pressureto opposite ends of said piston and opposite portions of said power head for reciprocating said plunger, power head and control valve, alternately in opposite directions to control the discharge of a fluid. to and from said flow pipe.

6. A deep well pump including a pump barrel composed of inner and outer pipes providing separate pressure and exhaust chambers therebetween, a flow pipe connected with the inner pipe, a hollow plunger within the inner pipe, a tandem arranged power head and control valve couplet embracing said plunger and reciprocable in the inner pipe, ports being provided for affording communication between said pressure and exhaust chambers and said inner pipe, and means for applying pressure from the pressure chamber to said plunger, power head and control valve for reciprocating said elements independently and together for regulating and effecting a discharge of the well fluid from said f'low pipe.

7. A deep well pump comprising a pump casing, a barrel on the lower end thereof provided with an inlet and an outlet for the well Huid, and pressure and exhaust chambers therein, a pump cylinder within the barrel, a hollow plunger movable in said cylinder for discharging the contents of the well therethrough, differentially operable power head and valve means telescoping said plunger and movable in said cylinder, and

vmeans affording communication between the vpump cylinder and said pressure and exhaust chambers for controlling the operation of said plunger.

v8. A deep well pump comprising a pump casing provided with a barrel on the lower end thereof, a cylinder within said barrel, a hollow plunger reciprocably mounted in said cylinder and provided with a head and a piston substantially spaced apart, said plunger having an inlet in direct communication with the well, and an outlet, a flow pipe connected with said cylinder in communication with said outlet, and means in said barrel and intermediate said head and said piston for regulating the application of a pressure element to said plunger for discharging the contents of the well therethrough.

9. A deep well pump comprising a pump casing having a How pipe therein, a barrel attached to the lower end of said casing and provided with a cylinder alined with said ow pipe, a hollow plunger reciprocably mounted in said cylinder and having an inlet at its lower end in communication with the well, and an outlet at its upper end in communication with said flow pipe, a head on the upper end, and a piston near the lower end of said plunger and substantially spaced apart, a power head, and a control valve embracing said plunger between said plunger head and said piston, and means ormed in said barrel for regulating the application of a pressure element to said plunger and said power head for discharging the contents of the well through said plunger.

10. A deep well pump comprising a pump casing having a flow pipe therein, a barrel attached to the lower end of said casing and provided with a cylinder alined with said How pipe, a hollow lunger reciprocably mounted in said cylin er and having an inlet at its lower end in communication with the well, and an outlet at its upper end in communication with said flow pipe, a head on the upper end, and a piston near the lower end of said plunger and substantially spaced apart, a power head, and a control valve embracing said plunger between said plunger head and said piston, and means formed in said barrel for regulating the application of a pressure element to said plunger and said power head for discharging the contents of the well through said plunger, said power head and said valve being differentially operable with respect to each other, for the purpose described.

11. A deep well pump comprising a pump casing having a flow pipe therein, a barrel attached to the lower end of said casing and provided with a cylinder alined with said fiow pipe, a hollow plunger reciprocably mounted in 4said cylinder and having an inlet at its lower end in communication with .the-Well, and an outlet at its upper end in communication with said iiow pipe, a head on the upper end and a piston near the lower end of said plunger and substantially spaced'apart, a power head, and a control Valve embracing said plunger between said plunger head and said piston, means formed in said barrel for regulating the application of a pressure element to said plunger and said power head for discharging the contents of the well through said plunger, said power head and said valve being diilerentially operable with respect to each other, means on said plunger permitting the initial movement of the plunger with respect to and adapted to engage and subsequently operate said power head, and means associated with the power head permitting an initial movelment of the power head and adapted to enp gage and subsequently operate sa1d valve.

' 12. A deep well pump comprising a pump casing, a flow pipe-therein,` a pump barrel attached to the'lower end of said casing, a cylinder in said barrel alined with said flow pipe, a head valve in the flow pipe, a hollow plunger reciprocable in said cylinder having an inlet at its lower end for receiving the well fluid, and an outlet at its upper end for discharging the .same into the flow pipe, a valve at the outlet of said plunger, an intermediate valve between said head valve and said plunger valve cooperating to enable the plunger to elevate the well fluid into the flow pipe, a piston on the lower end of said plunger and dillerentially operated power head and control valve elements dif ferentially reciprocable in said cylinder with respect to each other and with respect to said plunger, for controlling the application of a pressure fluid to the plunger in the operation of the pump.

18. A deep well pump comprising a pump casing having a flow pipe therein, a pump barrel suspended from said casmg, a cylinder in said barrel, a hollow plunger in said cylinder having an inlet for admitting'the well fluid thereto, and an outlet for discharging said fluid into said flow pipe, valve means for controlling the llow of fluid from the well to'said flow pipe, a piston associated with said plunger, a control valve for regulating the application of a pressure fluid ing to said piston for moving the plunger in opposite directions, and a power head for effecting the operation of said valve.

control valve and initially operable by said piston and adapted to be subsetfuently operated by a pressure fluid, for e ecting the operation of said control valve.

- 16. A deep well pump comprising a pump casing, a barrel suspended therefrom, a flow pipe within said casing, and alined with sa1d barrel, a plunger in said barrel having an inlet communicating with the well and an outlet communicating with said flow pipe, a piston associated with said plunger, al control valve for regulating the application of a pressure fluid to opposite ends of and for moving said plunger in' opposite directions, and a power head associated with said coiltrol valve, means whereby the initial operation of the power head may be effected through the medium of said plunger, and means whereby the subsequent movement of .said power head may be pressure operated, and means whereby said power head will initially move independently of and subsequently effect the movement of said control valve.

. EMIL S. GRAFENSTATT.

14. Adeep well pump comprising an inner and an outer pipe, a pump barrel connected with the outer pipe, a pumping mechanism in said barrel, means for connecting a pressure mechanism with the outer pipe, a plunger withinthe barrel havin a p1ston thereon, a control valve in said arrel selectivelyl associated with passages throu h the barrel for applying pressure from tie outer ipe to opposite portions of said piston, sa1d lunger having an inlet and an outlet for e ecting a flow of fluid from the well through said plunger, and a power head differentially associated with and for operating said control valve.

15. A deep well pump comprising a pump casing and a flow pipe therein, a barrel connected with said casing, a plunger in said barrel having a piston thereon, means for connecting a pressure mechanism with said barrel, said plunger having an inlet in comv -munication with the well, and an outlet in communication with said flow pipe', a. control valve embracing said plunger for regulating the application of a pressure fluid to opposite sides of saidipiston for dischargtie contents of the well through said plunger, a power head associated with said

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