US2123183A - Pumping mechanism - Google Patents

Description

y 1 1938. E. c. EKSTROMER 2,123,183

PUMPING MECHAN I SM Filed May 27, 1936 5 Sheets-Sheet l GLAN0% "Q;-

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- IN VEN TOR. fglynkb C. EKSTROMER ATTORNEYS July 12, 1938.

E. C. EKSTROMER PUMPING MECHANISM Filed May 27, 1956 5 Sheets-Sheet 2 //v VEN TOR In I EDWARD C. 5K5 reams/a July 12, 1938. E. c. EKSTROMER PUMPING MECHANISM 5 Sheets-Sheet 5 Filed May 27," 1936 M mix.

IN VEN TOE. .EKs TROMER BY 5 J ATTORNEYS EDWARD C Patented JuIylZ 19 38 h r n v UNITED STATES PATENT OFFICE PUMPING IVIECHANISM EdwardC. Ek stromer, Los Gatos, GaliL, assignor to Electrolift Corporation, Reno, Nev., a corporation of Nevada 3 Application May 27, L936, Serial No. 82,025

12 Claims. (01.103-46) The invention relates to pumping apparatus Figures 13 and 14 are transverse sectional views for wells, in whichelectric motors are arranged taken, respectively, on the lines. l3-l3 and in a well to drive a pump for elevating fluid from l4l4 of Figure 8. the well. Referring specifically to the drawings, and par- 11 An object of the invention is to provide a ticularly to Figure 1, the invention isshown aspumping mechanism wherein a plurality of elecsociated with a well casing In driven into the .trio motors are arranged in co-axial relationship bore ll of an oil well, and throughwhich extends to each other and to various other units, includthe usual tubing 12 constituting an oil discharge ing a reciprocating pump, with means for posipipe and being suspended from the casing head tively maintaining such co-operating relationl3 or other suitable support. At its lower end 1 ship of all parts as will prevent any relative disthe tubing is connected to the barrel ll of a replacement thereof both rotatively and axially, so ciprocating pump P. as to insure a, properly alined and balanced con- In Figure 2, the lower end of this pump is ildition of the mechanism essential for the latter Ilustrated in detail, to disclose aplunger [5 reto function with maximum emciency. ciprocable in the barrel and connected to a de- 1.;

Another object of the invention is to provide pending and co-axially arranged hollow plunger a pumping mechanism as above structurally and rod I6 through the medium of the cage ll of functionally characterized, wherein said means the traveling valve l8 of the plunger.

greatly facilitates the operations of assembling The plunger rod l6 passes freelythrough the and disassembling the motors and various units lower and valved head I9 of the barrel I l, and 20 of the mechanism with respect to an enclosing through a collar 20 to which-is secured a sleeve housing within which all parts are received and 2| containing a liner 22 within which the plunger sealed against the ingress of fluid from the well. works to provide a sealed joint between the two.

A further object of the invention is to provide The lower end of the sleeve 2| is secured by a 1.25 a pumping mechanism wherein the motors and collar 23 to a stuifing box 24 containinga pack- 25 pumps can be lowered into the well as a unit; ing 25 surrounding the plunger rod, and a packwherein a power plant of any desired capacity ing gland, 26 associated with the packing as can be obtained without necessitating enlargeshown in Figure 3.

merit of the casing, and wherein thepower plant From the stuifing box 24 the plunger rod ex- 3 can be located below the pump. tends through the top head 21 of a housing 28 30 With these'and other objects in'view, the inin the form of an open ended and elongated vention consists in the following combinations tubular body of a uniform external diameter. and arrangements of elements as set forth in The top head 21 is provided with a base flange 23 the following specification and particularly secured by bolts 30 to a plug 3| threaded tightly pointed out in the appended claims. at 32 into the upper end of the housing 28 so as 35 In the accompanying drawings, l to secure the top head 21 rigidly thereto. The

i Figure 1 is a view showing the pumping mechatop head is rigidly connected at its upper end to nism embodying this invention installed in a well the lower end of the stuffingbox 24 by a coupling hole for pumping; 33

Figures 2, 3, 4,5, 6, Land 8 are enlarged verlit its lower end the plunger rod is tapered 40 tical longitudinal sectional views of the mechaand threaded as shown at 34 and 35, respectively nism, which views are end-to-end continuations for coaction with a nut 36 in securing the plunger of each other in the numerical order of the figrod to a crosshead 31 within connecting 'rod ures, starting with the lower portion of the reguides 38 of arcuate cross-section receiving and ciprocating pump in Figure 2 down to the botkeyed at their upper and lower ends as indicated 45 tom end of the housing in Figure8; at 39 and 40, respectively, to collars 4| and 42. Figure 9 is a longitudinal sectional view ofpor- Supported on the crosshead .31 and surrounding tions of the mechanism shown in Figures 4 and the plunger rod is a protecting device D of the 5, and taken at a right angle to the latter iiggeneral characters embodied in my U. S. Patent ures; Nos. 2,031,826,.2,034,753, and 2,034,754. Such a 5 Figures 10 and 11 are transverse sectional views device functions during reciprocation of .the taken, respectively, on the lines Ill-l0 and plunger rod to collect and eject frornthe housing ll-ll of Figure 4; 28 through the plunger rod all fluids which Figure 12is a transverse sectional view taken might leak thereinto around the plunger rod. I on the line l2-l2 of Figure 6; The upper collar 4| is secured by a circular series of bolts 48 to a suspension collar 44 threaded externally at 45 into the housing. Secured at their upper ends to the cross head 31 at diametrically opposed points and between the guides 38 are connecting rods 48 (Figure 9). These connecting rods provide an operative connection between the crosshead and a mechanism C for converting the rotary motion of electric motors 48 into reciprocating motion in order to reciprocate the plunger ii of the pump P.

The mechanism C which is of the general character disclosed in my U. S. Patent No. 1,799,458, issued April '1, 1931, is specifically the same as that disclosed and claimed in my copending application Serial No. 95,556, filed August 12, 1936. For the purpose of this description, it will sufllce to state that this mechanism comprises a shuttle member 49 to the upper end of which the connecting rods 45 are secured. The shuttle member is adapted to be reciprocated along a double threaded screw shaft 59, as the latter is ven continuously in one direction from the electric motor 48 through a suitable epicyclic reduction gearing mechanism M interposed between the motors and shaft within the housing as shown in Figure '2. Suitable clutches 5i- -5i and 52-52 are caused to be alternately engaged and disengaged to render right and left hand nuts 53 and 54, respectively, alternately operable to feed the shuttle member between the upper and lower bearings 55 and 55 in which the upper and lower ends of the shaft are journaled as shown, respectively, in Figures 4 and 6.

The shuttle member 49 has fixed thereto at diametrically opposed locations longitudinal keys 51-51 which slide in longitudinal grooves 58-58 formed in the housing 28 to extend from its upper end to a point adjacent its lower end, as shown in Figures 4, 5, 6, 7 and 8. The keys and grooves co-act to confine the shuttle member to movement axially in the housing.

The upper bearing 55 which is secured to the collar 42 by a threaded connection 59, and is locked to the collar by threaded fastening mem-' bers 58, is confined against rotation relative to the housing by heads ii on the members which are of rectangular form and are 'slidably received in the grooves 58. Likewise, the lower bearing 58 is confined against rotation relative to the housing 28 by the rectangular heads 52 of fastening members 58 which are slidably received in the grooves 58 and serve to lock this bearing member to a collar 54. The collar 64 is rigidly connected to a tube 85 enclosing the splined connection 88 between the lower end of the screw shaft 58 and the upper end of the driven shaft 51 of the epicyclic gearing mechanism M enclosed within a suitable cylindrical casing 88. At the lower end of the casing 88 the drive shaft 69 of the mechanism M has a splined connection 19 with the rotor shaft 1i of the uppermost electric motor 48.

The upper end of the casing 68 is rigidly connected to the tube 55 through an interposed collar 12, and the lower end of the casing is connected to the upper end bell 18 of the uppermost motor 48 through the medium of a collar 14, a tube 15, a second collar 15 abutting the bell 13, and a ring 11 threaded internally to have oppositely threaded connection with the latter collar and the bell. Fastening members 18 lock the ring to the collar 15 and to the bell 13 at the abutting faces thereof, and these members are provided with rectangular heads 18 slidably received in the grooves 58.

As will be readily apparent from Figures '7 and 8. the motors 48, of which there may be any desired number to provide a predetermined total horsepower, are arranged end to end in coaxial relationship. The speciflc form of fastening means including the ring 11 and fastening members 18 having heads 18 projecting into the grooves 58, is provided at the confronting ends of the motors and also at the lower end bell 89 of the lowermost motor, as shown in Figure 8.

This fastening means except for the functioningof the heads 19 of the members 18 in providing keys which co-act with the grooves 58 to confine the stators of the several motors against rotation relative to the housing, form no part of the present invention, but are described and claimed in my copending application for patent on Multiple motor unit, Serial No. 95,557, filed August 12, 1936. A multiple motor unit of the same general character is disclosed in my U. 8. Patent No. 1,960,484 in conjunction with reduction gearing and a motion converting mechanism, all in a submerged pumping assembly. x

The ring 11 at the lower end bell of the lowermost motor 48 connects the latter to a sustaining collar 8| through an interposed flange 82,

the collar 8| having a threaded connection 83 interiorly of the housing 28, and receiving a circular series of bolts 84 threaded into the flange, all as clearly shown in Figure 8.

Threaded into the lower end of the housing 28 is a plug to which is secured by a circular series of bolts 86, a cap 81 providing a sealing closure for the lower endof the housing.

In assembling the mechanism, the several units which are intended to be enclosed by the housing 28 are rigidly connected together, as above described. With the bottom cap 81 removed from the housing, and the plug 85 in place, the rigid assembly of the several units, 1. e., electric motors 48, gearing mechanism M, motion converting mechanism 41, crosshead 81, plunger rod It, with the suspension collar 44 applied to the rod, are inserted motors foremost, into the upper end of the housing. The heads 18 and 62, the keys 51, and theheads 6|, are received in the grooves 58 as the associated parts are inserted inthe housing. When the flange 82 abuts the sustaining collar 8i, the bolts 84 are screwed home. The suspension collar 44 can now be screwed tightly into the housing 28 and the bolts 43 then screwed home. Following this the top head 21 and bottom cap 81 can be applied to the housing as shown in Figures 3 and 8, respectively. v

with the aforestated rigid assembly of units thus supported in the housing 28, the heads 19, 82, and GI co-act to positively prevent the assembly from rotating relative to the housing, as likewise do the keys 51, which latter in addition are free to slide in the grooves 58 so as to co-act therewith in confining the shuttle member 49 to motion axially in the housing.

The collars 44 and 8| co-act with the housing 28 to confine the aforestated rigid assembly of units against any and all axial displacement relative to the housing, so that the units will be maintained in proper co-operative relationship to insure the alined and balanced condition of the mechanism necessary for maximum efliciency in operation. Furthermore, the manner in which the assembly of units is structurally and functionally associated with the housing enables the latter to be effectively sealed against the ingress of well fluid, while providing for the application 75 to the housing; collars secured in the housing of theassembly to. and its removal housing with ease and dispatch.

From the foregoing description. it will be manitest that the entire mechanism. including the pump P, can be readily lowered into and removed from a well as a unit, and that when operating it is wholly suspended in the bore hole by the tubing through which the oil israised from the well. a C I What is claimed is: 1. In pumping mechanism of the class described, a tubular housing adapted to be suspended Irom its upper end in a well hole; a rigid irom. the

F assembly of operatively connected units insertable into an end of the housing and including a co-axial series of motors and power transferring mechanism having a member to which reciprocating movement is transmitted; co-acting means on the housing and units of said assembly for confining the latter against rotation relative to the housing; and means in the housing co-acting with the uppermost and lowermost units of the assembly to secure the assembly against axial displacement in the housing.

2. In pumping mechanism of the class described. a tubular housing adapted to be suspended from its upper end in a well hole, and

-internally grooved longitudinally; a rigid assembly of operatively connected units insertable into an end of the housing and including a co-axial series of motors and power transferring mechanism having a member to which reciprocating movement is transmitted; keying means projecting from units of said assembly at intervals along the length thereof, into the groove of the housing to confine the assembly against rotation relative to the housing; and means in the housing coacting with the uppermost and lowermost units of the assembly to secure the latter against axial displacement in the housing.

-3. In pumping mechanism 'of the class de*- scribed, a tubular housing adapted to be suspended from its upper end in a well hole, and internally grooved longitudinally; a rigid assembly of operatively connected units insertable into an end of the housing and including a coaxial series of motors and a power transferring mechanism having a member to which reciprocating movement is transmitted; keying means projectingfrom units of said assembly at intervals along the length thereof, into the groove of the housing to confine the assembly against rotation relative to the housing; collars secured in the housing 1 above andbelow the uppermost and lowermost units of said assembly; and means co-acting with the collars and said uppermost and lowermost units to confine said assembly against axial displacement relative to the housing.

4. In pumping mechanism of the class described, a tubular housing adapted to be suspended from its upper end in a well hole, and internally grooved longitudinally; a rigid assembly of operatively connected units insertable into i an end of the housing and including a coaxial series of motors and power transferring mechanism having a member to which reciprocating movement is transmitted; keying means projecting from units of said assembly at intervals along the length thereof, into the groove of the housing to confine the assembly against rotation relative above and below the uppermost and lowermost unitsmf said assembly; and bolts in said collars threadedly connecting the said uppermost and lowermost units to the collars for coaction thereceive within confining the assembly against axial displacement relative to the housing.

5. In pumping mechanism of the class described, an open-ended tubular housing adapted to be suspended in a well hole, and being internally grooved longitudinally; an assembly oi operatively connected units including a rotary prime mover and a reciprocating power transmost units to confine said assembly against axial displacementrelative to the housing; a removable closure sealing the lower end of the housing; and a removable top head adaptedto rea plunger rod and closing the upper end of the housing.

6. In pumping mechanism of the class described. a tubular housing adapted to be suspended from its upper end in a well hole, and internally grooved longitudinally; a rigid assembly of operatively connected units insertable into an end of the housing and including a co-axial series of motors and mechanism having a shuttle driven thereby and provided with a key reciprocable in said groove of the housing to confine the shuttle to movement axially in the housing; keying means projecting from units of said assembly into the groove of the housing to confine such units against rotation relative to the housing; and means co-acting with the housing and with the uppermost and lowermost units of said assembly to confine the latter against axial displacementrelative to the housing.

7. In pumping mechanism of the class described, a tubular housing adapted to be suspended from its upper end in a well hole; and

' internally grooved longitudinally; a rigid assem- 'said assembly into the grooves of the housing to confine such units against rotation relative to the housing; collars secured in the housing above and below the uppermost and lowermost units of said assembly and bolts in the said collar threadedly connecting said uppermost and lowermost units to thecollars for co-action therewith in confining the assembly against axial displacement relative to the housing.

8. In pumping mechanism of the class described, a tubular housing adapted to be supported in a well hole; a rigid assembly of operatively connected power and power-transferring units insertable into an end of the housing; means on the housing and units of the assembly for confining the assembly against rotation relative to the housing while rendering the assembly free to be inserted into and removed from the housing in a. longitudinal direction relative to the latter; and means co-acting with the housing and assembly to removably secure the assembly in the housing against relative displacement axially thereof.

scribed, a tubular housing adapted to be supported in a well hole and being longitudinally grooved internally; a rigid assembly of operatively connected power and power-transferring units insertable into an end of the housing; keying means on units of said assembly projecting into the housing groove for co-action therewith in confining the assembly against rotation relative to the housing while rendering the assembly free to be inserted into and removed from the housing in a longitudinal direction relative to the latter; and means co-actlng with the uppermost and lowermost units of said assembly to removably secure the assembly in the housing against relative displacement axially thereof.

10. In pumping mechanism of the class described, a tubular housing adapted to be supported in a well hole and being longitudinally grooved internally; a rigid assembly of operatively connected power and power-transferring units insertable into an end. of the housing; keying means on units of said assembly projecting into the housing groove for coaction therewith in confining the assembly against rotation relative to the housing while rendering the assembly free to be inserted into and removed from the housing in a longitudinal direction relative to the latter; collars fixed in the housing above and below the uppermost and lowermost units of said assembly; and bolts in the collars co-acting with said uppermost and lowermost units to confine the assembly in the housing against axial displacement relatively thereto.

11. In pumping mechanism of the class described, a tubular housing adapted to be sus-- pended in a well. hole, and being internally grooved longitudinally; an assembly of operatively connected units including a rotary prime mover unit and a power transferring unit having a reciprocating member portions of which work in said groove of the housing to confine said member to reciprocating motion therein; keying means projecting from the prime mover unit into the housing groove for coaction therewith in confining such unit against rotation relative to the housing; and means co-acting with the housing and the assembly to secure the latter against axial displacement in the housing.

12. In pumping mechanism of the class described, a tubular housing adapted to be suspended in a well hole, and being internally grooved longitudinally; an assembly of operatively connected units including a rotary prime mover unit and a power transferring unit having a reciprocating shuttle member; elongated keying means projecting from the shuttle member and working in the housing groove to confine the shuttle member to reciprocating motion in the housing; keys projecting from the prime mover unit of the assembly into the housing groove for co-action therewith in confining such unit against rotation relative to the housing; and means co-acting with'the housing and assembly to confine the latter against axial displacement in the housing.

EDWARD C. EKSTROMER.

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