US1097376A - Deep-well pump. - Google Patents

Description

A. C. TERKELSON.

DEEP WELL PUMP.

APPLICATION FILED JAN. 21, 1913.

1,097,376. Patented May 19, 1914.

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A. G. TERKELSON.

DEEP WELL PUMP.

APPLIOATION FILED JAN. 21, 1913.

1,097,376. Patented May 19, 191;

8 SHEETSSHEET 2.

A TTOR/VEY 7 COLUMBIA PLANOGRAP" co., WASHINGTON, D. c.

A. C. TERKELSON.

DEEP WELL PUMP.

APPLICATION FILED JAN. 21, 1913.

1,097,876, Patented May 19, 1914.

3 SHEETSSHEET 3.

clu cii edh 3 WITNESSES: R: INVENTOR A TTOR/VE CQLUMEIIA pLANoaR/mn CO WASHINGTON, D c.

ALBERT GRIST TERKELSON, OF OAKLAND, CALIFORNIA.

DEEP-WELL PUMP.

Application filed January 21, 1913.

Specification of Letters Patent.

Patented May 19, 1914-. Serial No. 743,301.

To all 'LU/LO'HL it may cancer 12.:

Be it known that I, ALBERT Cius'r TrimmisoN, a citizen of the United States, residing at Oakland, in the county oi Alameda and State of California, have invented new and useful Improvements in Deep-V3 ell Pumps, of which the following is a specification.

This invention relates to pumps and particularly to double-acting, continuous discharge, deep well pumps.

The object of this invention is to provide a double-acting, continuous discharge pump of such construction as to eliminate rigid pumprods and their transverse guides; to overcome the use of friction creating transmission devices, and to provide a pump structurally capable of increased speed over rod pumps and of greater stroke; and operable readily in distorted well.

The invention consists in the construction and details thereof.

Figure 1 is a general elevational view of the pump. Fig. 2 is a general plan of Fig. 1. Fig. 3 is an elevational sectional. view of the casing, tube and cylinders. Fig. 41 is a detail sectional View of the casing, tube and cylinders. Fig. 5 is a detail sectional view of the lift mechanism. Fig. 6 is a plan of the lift mechanism. Fig. 7 is a sectional detail of shipper cam and driver sheave. Fig. 8 is a sectional detail of shipper cam in releasing action. Fig. 9 is a sectional detail of a sheave. Figs. 10 to 16 inclusive are diagrammatic views showing positions of coordinate parts during one cycle of the counter shaft, the sheave being shown disalined for clearness.

In Figs. 1, 3 and l: a well A is shown having a discharge tubing 2 with an outlet connection 3 at the top and a seat or bushing a at the bottom. Resting on the seat 4 is a cylinder 5 of somewhat less than the size of the tubing 2, which latter is jointed adjacent the top of cylinder 5 by a nipple G with an inner annular groove 7 into which is snapped a cylinder locking springdatch or detent 8 carried by the cylinder 5, which is adapted to be lowered or lifted at will from the well pipe 2. The latch 8 is provided with a lever 9, or other means, which is cooper-able with a part of the apparatus to be hereinafter described when it is desired to unlatch the cylinder to permit its removal. Within the cylinder .1 are reciprocating up per and lower pistons B and C re spectively, of suitable diameters and common axis, and having valves 11 closable on the upward pumping stroke ot the pistons. Each piston is provided with a radial arm 12 projecting into respective slots or channels 13 of the cylinder 5 and preventing circumferential movement of the pistons relative to the cylinder, which is held against such motion in the tubing by a suitable stop device as 1 1 ()ne of the important features of the present invention is the means for operating the pistons, both as to the manner and time. This means consists of a flexible material of relatively great tensile strength for its proportions, preferably being steel cable, a section 1 1- of which is extended down into the well passing thence through the upper piston l3 and connecting with the piston G at a bridge or part 15 thereof. The cable section 14 at the top of the well runs over guidepulley 16 at the head frame 17, thence to a winding device 18 here shown as a halt sheave mounted on acenter shaft 19, having a fast gear 20 driven from a drive shaft 21. lVhile it is possible to use a single cable section also to lift the upper piston l3 I prefer to connect to the piston B at equal spaced positions, a plurality of cable stretches as 22-23, for the reason that a more direct application of force is had and side thrust is eliminated since the pull. is balanced on each side of the piston. The stetches :22-23 join at the top of the well into a short single lead 24: which runs over a head pulley 25, thence to a winding sheave 26 on shaft 19. Inasmuch as the cables 1%, 22 and 23 have no downward driving function as to their respective pistons, and for the purpose of insuring the positive and regular down stroke of'the pistons without depending entirely on gravitation, it isdesirablc and advantageous to, connect the pistons by a means permitting and producing sinuiltaneous opposite or coincident movement in the same direction. For the accomplishment of this function and operation, there is attached to the bottom oil the upper piston B one or more stretches of a flexible connection, asa cable 27 which is led down through the piston C and securely attached to a yoke 28, from which it runs over a pulley block 29; thence upward to and over a guide pulley 30 on the yoke 28, fast to cable 27, and

finally connecting centrally to the lower portion of the piston G. The special arrangement of the drag cable 27 is purposely to avoid, as far as possible, all side thrust or pressure in the operation of the parts.

Any suitable mechanism may be utilized for intermittently hauling or drawing up the piston cables is and 24 (2223) in given time, order and speed, and I have shown one means of doing so consisting of the sheaves 18 and 26 on shaft 19. For practical reasons it is desi'able that the power mechanism operate with a continuous rotary motion, while the pistons are given a reciprocating action, and it is particularly desirable that the pistons be given such motion that a portion of their upward travel will be coincident, or in other words the pistons at one time will be in unidirectional motion. The desired motion may be had by mounting the sheaves 18 and 26 loosely on the shaft 19 and arranging appropriate clutches as 31 on the shaft for driving engagement with their respective sheaves, each of which has a lug 32, Figs. 5, 6 and 9, engageable with a clutch 31. The clutches 31 are slidably set on the shaft each with a dog 33 at opposite sides of the shaft (see Figs. 10 to 16), and to each sheave is attached respective cables suspending their pistons at appropriate distance and relative positions in the cylinder 5, as seen in Fig. 10, with one piston C at its lower limit and the other B rising, and the dogs 33 of the clutches in driving engagement with their sheaves. After the piston B moves from position in Fig. 10 to Fig. 11, its clutch 3133 is disengaged by any suitable device, as a shipper 3a actuated in proper time from a controller here shown as a cam 35 on shaft 19, whereupon the released sheave will automatically swing back (Fig. 12) opposite to rotation of shaft 19, slack up cable 2st, and allow the piston B to descend. As piston B descends, piston C is being lifted by the cable 14. and sheave 18 driven by its respective clutch 3133, which will be disengaged in due time by its shipper 3st to release sheave 18 when piston C is at its top limit of stroke. This orderly rise and fall of the two pistons is made positive by the connection 27 attached to the pistons and playing on the pulley block 29 below. If the pistons B and C constantly moved in opposite directions, at the moment of reversal of travel there would occur a cessation of upward flow of liquid in the discharge tube 2, and to avoid this and to obtain a continuous discharge from the pump, I so design and arrange the parts that for a portion of a cycle of shaft 19 the pistons will rise coincidently at a uniform or differential speed as desired. To that end the sheaves l8 and 26 are designed to lift the pistons equal length strokes though the pistons are so relatively positioned that before one reaches its upper limit, the other will start its upward movement from lowermost position.

Inasmuch as the pistons are connected by the drag-cable 27 rove in the pulley 29, and since the pistons move in one direction for a period, it is necessary that some means be provided for compensating or yielding, so that the drag-cable will allow the pistons to momentarily change their normal relations during travel in opposite directions. I obtain this compensation by mounting the pulley 29 for movement relative to the cylinder 5. The pulley is journaled upon a hearing 35 on the upper end of piston rod 36 of a piston 37 operable in a cylinder 38. The cylinder 38 is securely attached to the bottom of cylinder 5 and has a duct 39 communicating with the chamber between the tubing 2 and the cylinder 5, so that liquid at pressure of the discharge head enters the cylinder 38 and is operative upon the piston 37, holding this down until such times as the two pumping pistons B and C are both rising, when the drag-rope 27 will act a a rigid link between the pistons B C and 37, lifting the latter a distance approximately equal to the distance of imidirectional travel of pistons B and C. Differential speed of simultaneous upward movement of the pistons B and G is provided for, both by the running of the drag-cable 27 on its sheave 29 and by the differential piston 37. This piston is of suiiicient diameter under a given head in the discharge pipe to overcome friction of the operating parts in the barrel of cylinder 5, and automatically descend as the two pistons B and C cease simultaneous up ward mov ment and one or the other oescends. The piston 37 has suitable means, as pins 40, running in guideways n of the cylinder 38 for preventing its turning in the cylinder and twisting the drag-cable. hen the two pistons B C begin to rise together, the load of liquid lifted will be transferred from the slower to the faster moving one, and the latter will then subject its lifting cable to a greater strain, which will give a stretch somewhat in the direction of the load. To offset this tendency of reduction of upward movement by stretching of cable, I so proportion the lifting sheaves that the automatical upward stroke is somewhat at accelerated speed, the acceleration neutralizing the stretch and giving the cable a normal predetermined or mean speed.

it will be seen that by my construction I eliminate side thrusts and therefore avoid the use of bearings and guides to resist the same, and, further, at no time is either of the pistons lift devices, cables H2t in my invention, subject to compression as in stiffrod connections 011 the down stroke of piston.

Because of the much lighter construction of all reciprocating parts of my pump, there will be less inertia to contend with on the down stroke at a given piston speed, and therefore as the capacity of the pump is determined by the speed of the down stroke, this pump can be worked faster and at increased capacity. The reciprocating parts are counterbalanced at the head works by a weight 45 attached to a cable, or equivalent, 46 secured on a part of respective sheaves 18-26.

The continuity of load on the pumping pistons relieves the power head of varying shocks, and an additional advantage of my pump is that a great deal of time is saved when, for any reason, itis necessary to remove elements of the structure from the well, as there are no joint of stiif rods to unscrew or break. As it is ditiicult to drill a deep well plumb, and because of frequent deviation from a plumb line, stifhrod pistons often jam or run with great friction, and by my construction and the employment of a flexible haul member, it is possible to pump from very disalined and deep wells in which a still" rod pump could not be employed.

For the protection of the substructure against loss by rupture of the haul cables 14e-2i, a safety joint in their length at the head gear may be provided, which will give way before a breaking steam produced in the cables in the well. Until a suflicient head has accumulated in the discharge pipe 2 to drive down the differential piston 37, the pistons "BU are operated without the overlap-stroke, each piston moving opposite to the other throughout the reciprocations.

Referring to Figs. 10-16, as piston B approaches limit of lip-stroke, piston 0 begins to rise and take the load from piston B, the speed of which diminishes, while C accelerates until all the load is off B, the cable of which can be readily released by its shipper clutch. At the release of piston B the differential block 29 drops a distance equal to the lap-stroke of pistons and pulls the piston B down twice as far, as in Fig. 19, the latter reaching the bottom limit of Fig. 18 before C has ceased upward stroke.

.lt is understood. that i may employ any appropriate and convenient means, operating with the same function, in lieu of the simple form of connection directly between the piston B C for obtaining reverse or positive downward movement.

Having thus described my invention, what I claim and desire t secure by Letters Patent is:

1. In a deep well pump the combination of a discharge pipe, a cylinder fitted in a lower portion of the discharge pipe, tandem reciprocal pistons running .in the cylinder and having upwardly opening valves, a power-head consisting of a mechanism for intermittently elevating each piston in the cylinder and a bendable tension lift connecting the head gear mechanism with the piston and devices for moving the pistons unidirectionally during a portion of their cycles.

52'. In a deep well pump the combination with an intermittently operating lift mechanism of a bendable lifting structure intermittently hauled by said mechanism, a plurality of reciprocating pistons connected to said mechanism by said lift structure, auto matically operating valves on the pistons and a relatively stationary barrel in which said pistons are arranged in tandem and reciprocate and devices for moving the pistons unidirectionally during a portion of their cycles.

3. The combination in a deep well pump, of the discharge pipe, a plurality of reciprocating tandem pistons operable in the lower portion of the pipe, a piston lift mechanism, and means connecting said piston and said mechanism for operating the pistons comprising tension, flexible, haul members connected to their respective pistons and said mechanism and devices for moving the pistons imidirectionally during a portion of their cycles.

4t. The combination in a deep well pump, of the discharge pipe, a plurality of reciprocating pistons operable in tandem in the lower portion of the pipe; a piston lift mechanism and means connecting said pistons and said mechanism for operating the pistons comprising tension, flexible, haul members connected to their respective pistons and said mechanism; said mechanism operating to lift up one of the pistons through the tension lift connection, while drawing the other piston down and devices for moving the pistons unidirectionally during a portion of their cycles.

5. A deep well pump comprising a discharge tube, a plurality of tandem pistons operated in the lower portion of the tube; and means whereby said pistons are operated oppositely sinniltaneously; said means comprising a power mechanism, flexible, lift, tension members connecting said pistons with the power mechanism, for hauling actuation thereby, and a tension connection between each of the pistons for controlling the downward motion of the same and devices for moving the pistons unidirectionally duringa portion of their cycles.

6. In a pump, a discharge tubing, a plurality of pistons operable in the lower portion of the tubing, and a power mechanism whereby said, pistons are siu'lnltaneously &

moved oppositely for a considerable portion of their stroke and subsequently in the same direction for the remainder of their strokes; said means comprising intermittently operative and automatically releasing members, and lift tension elements connecting said members and the pistons, and a connection between the lstons for keeping the downwardly moving elements under tension during operation.

'7. In a pump, in combination with a power mechanism, a plurality of pistons, a discharge tube in the lower portion of which the pistons operate, flexible tension members connecting the pistons and the power mechanism and a yieldable flexible connection between said pistons, whereby during the upward stroke of one of the pistons, the other piston is positively operating during the descending stroke and its flexible lift member maintained in tension.

8. In a pump in combination with a power mechanism, a plurality of pistons, a discharge tube in the lower portion of which the pistons operate, flexible tension members connecting the pistons and the power lnecln anism, and a yieldable flexible connection between said pistons, whereby during the upward stroke of one of the pistons, the other piston is positively operated during the descending stroke and lLS lbXilJlQ lift member maintained in tension; said power mechanism operating to actuate the pistons oppositely for the larger portion of their strokes and simultaneously in the same direction for the remaining portion of their strokes, during which latter the yieldable lexible connection follows both pistons in directional movement.

5). In a pump in combination with a well tubing, a plurality of pumping pistons oper able in tandem in the lowe" portion of the tubing, a continuously rotating power shaft, lifting sheaves loosely mounted on the shaft clutches for the respective sheaves whereby the latter are moved uniformly with the shaft for a portion of its cycle and release for reversal relative thereto, and flexible haul connections between said pistons and said sheav-s whereby when the sheaves are actuated with the shaft, the pistons are raised, and a yieldable, tension device conneeting the pistons.

10. In pump in combination with a well tubing, a plurality of pumping pistons operable in the lower portion of the tubing, a continuously rotating power shaft; lifting sheaves loosely mounted on the shaftclutches for the respective sheaves wheiwliy the latter are moved uniformly with a shaft for a portion of its cycle and released l flesible haul reve sal relative thereto, ant connections between said pistons and said sheaves whereby when the sheaves are actuated with the shaft, the pistons are raised,

noensvc and a yieldable. connection between said pistons whereby when one of the pistons is lifted by its respective driven sheave, the other piston is mechanically lowered synchronously.

11. in a pump in combination with a well tubing, a plurality of pumping pistons operable in the lower portion of the tubing, a continuously rotating power shaft, lifting sheaves with a balance loosely mounted on the shaft, clutches for the respective sheaves whereby the latter are moved uniformly with a shaft for a portion of its cycle and released for reversal relative thereto, flexible haul connections between said pistons and said sheaves whereby when the sheaves are actuated with the shaft, the pistons are raised, and a yieldable connection between said pistons whereby when one of the pis tons is liit d by its respective driven sheave, the other piston is mechanically lowered synchronously, said connection including acable attached to the pistons and a pulley )lGCli over which the cable is rove.

2. In a pump in combination with a well tubing, a plurality of pumping pistons operable in the lower portion of the tubing, a continuously rotating power shaft, lifting sheaves loosely mounted on the shaft; clutches for the respective sheaves whereby the latter are moved uniformly with a shaft for a portion of its cycle and released for reversal relative thereto, and flexible haul connections between said pistons and said sheaves whereby when the sheaves are actuated with the shaft the pistons are raised, and connection between said pistons whereby when one of the pistons is lifted by its respective driven sheave, the other piston is mechanically lowered synchronously, said connection including a. cable attached to the pistons and a pulley block over which the cable is rolled; the relation of the loose sheaves on their shaft and the pistons being such that during one cycle of the sheave shaft, the istons will be moved oppositely and will su sequent-1y be moved in the same direction.

13. In a deep well pum I the combination wi h discharge tube, of a plurality of pistl rein, a lift mechanism, erzible tension in inbers connected respecively to said pistons and to respective eleients of the lift mechanism, said elements i ing of intermittently driven sheaves mounted on a driving shaft for "er --.tely lifting and permitting the downerd movement of their respective pistons aid for simultaneously moving the pistons common direction for a portion of strokes, said sheaves being so designed nutralize the stretching effect of the lift element as the faster upwardly moving piston takes the loao. from the slower upmoving piston.

let. In a deep well pump the combination with a discharge tube, of a plurality of pistons operating therein, a lift mechanism, flexible tension members connected respee" tively to said pistons and to respective elements of the lift mechanism, aid elements consisting of intermittently driven sheaves loosely mounted on a driving shaft for alternately lifting and permitting the downward movement of their respective pistons and for simultaneously moving the pistons in a common direction for a portion of their strokes, and a means for positively actuating the alternately descending pistons and keeping the lifting element in tension and automatically compensating when the pistons move upwardly in the same direction.

15. in a deep well pump the combination with a discharge tube, of a plurality of pistons operating therein, a lift mechanism, flexible tension members connected respectively to said pistons and to respective elements of the lift mechanism, said elements consisting of intermittently driven sheaves loose on a driving shaft for alternately lifting and permitting the downward move ment of their respective pistons and for simultaneously moving the pistons in a con mon direction for a portion of their strokes, and a means for positively actuating the alternately descending pistons and keeping its lifting element in tension and auttnnatically compensating when the pistons move upwardly in the same direction, said actuator including a flexible element attached to the pistons and being mounted for operztion upon a yieldable automatically operable support.

16. ln a deep well pump, the combina tion of a discharge pipe, a cylinder adjustable therein, tandem pistons in. the cylinder with valves, means for moving the pistons oppositely and unidirectiomilly in one cycle of said means, and a yieldable follower connected to said pistons for keeping the piston opera ing means under tension during downward stroke.

1?. in a deep well pump, the combination of a discharge pipe, a valveless cylinder adjustable therein, tandem pistons in the cylinder with valves, means for moving the pistons oppositely and unidireetionally in one cycle of said means, and a yieldable follower connected to said pistons for keeping the piston operating means under tension during downward stroke.

18. lln a deep well pump, the combination of a discharge pipe, a cylinder adjustable therein, tandem pistons in the cylinder with valves, means for moving the pistons oppositely and unidirectionally in one cycle of said means, and a yieldable follower connected to said pistons for keeping the piston operating means under tension during downward stroke, said follower being subjected to hydraulic pressure.

19. in a deep well pump, the combination of a discharge pipe, a cylinder adjustable therein, tandem pistons in the cylinder with *alves, means for moving the pistons oppositcly and unidirectionally in one cycle of said means, and a yieldable follower connected to said pistons for keeping the piston operating means under tension during downward SL-L'OliG, said follower being subjected to hydraulic pressure for automatic return movement.

20. in a deep well pump, the combination of a discharge pipe, tandem pistons at the lower portion thereof with valves, 21 power head coi'isisting of a mechanism for moving the pistons oppositely and simultaneously unidirectionally during one cycle of said head, and a follower connected to said pistons for keeping the piston operating means under tension during downward stroke.

21. In a deep well pump, the combination of a discharge pipe, tandem pistons at the lower portion thereof with valves, a power head consisting of a mechanism for moving the pistons oppositely and simultaneously unidirectionally during one cycle of said head, a connection between said pistons whereby power is transmitted from the up wardly moving piston to the downwardly moving one for positively operating the same, and a follower to which said connection is attached whereby said connection is allowed to move up when the pistons move unidirectionally.

In testimony whereof l have hereunto set my hand in the presence of two subscribing witnesses.

ALBERT CREST llEl-tKELSbrl.

lVit-nesses Jonn ll. Hnnmno,

V. W. IIEALEY.

Gopies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents,

Washington, ll. 6.

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