US1764657A - Pump - Google Patents

Description

A. B. STEEN June 17, 1930'.

PUMP

5 Sheets-Sheet Filed July 31, 1926 avwembo'c l-fS-MMM MAW June 17, 1930. A, B, STEEN 1,764,657

- PUMP.

Figled Jul 51, 19 26 5 Sheets-Sheet s Junn, 1930. A. B .STEEN 1,764,657

PUMP

Filed July 51/ 1926 5 Sheets-Sheet 4 A, B. STEEN June 17, 1930.

PUMP

Filed July 51, 1926 5 Sheets-Sheet 5 avwewcoz Paton June 17,

.PAENT time ARTHUR B. scram, OF HOUSTON, TEXAS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE TEXAS COMPANY, OF NEW YORK, N.

Y., A CORPORATION OF DELAWARE PUMP Application filed July 31,

deep wells and one which does not have to be equipped with sucker rods and lines which are so enerally employed in pumping wells.

Anot er object of the invention is to provide a pump which operates with a long stroke underground and with a relatively short stroke on the surface.

A still further object of the invention is to provide a pump which will operate in a well, the bore of which may not by chance be quite straight.

One of the features of the inventionis the provision of a piston having two spaced pistonheads of different diameters with means for admitting fluid pressure between the two piston heads. One of the piston heads has a greater diameter than the other so that the piston is actuated in the direction of the larger piston head by reason of the excess effective pressure on that piston head.

Other objects, features and advantagesof the invention will appear from the following description thereof when taken in connection with the accompanying drawings in which:

Fig. 1 is a partially diagrammatic view ofthe surface equipment illustrating its relation to and its connection with the well cas- Figs. 2, 3, 4, 5, 6 and 7 are views of vertical sections of the pumping apparatus within the casing, which taken collectively, and with Fig. 2 at the top and Fig. 7 at the bottom and with the other sections interposed in their proper order, show a vertical section. through the length of the underground pumping apparatus.

Fig. 8 is a sectional line 8-8 of Fig. 2.

' Fi 9 is a sectional plan view taken on the line 9-9 of Fig. 3.

Fig. 10 is a vertical sectional. View of an auxiliary pump.

plan view taken on the 1 Fig. 11 shows, on a reduced scale, the

assemblage of parts shown in the preceding es. %gferring now to the-drawings, and for 1926. Serial, no. 126,302.

the moment more particularly to Figs. 2 and 6, it will be seen that there is provided an outer casing or tubing 10 composed of one or more suitabl connected sections of pipe, and an inner tu ing 11 similarly constituted.

The casings .10 and 11 are connected to a coupling member 12 which is provided with a plurality of longitudinal passages 13 which communicate at their upper ends with the annular space between the casings 10 and 11. The member 12 is also formed with a circular bore 14 which is in communication with the lower end of the casing,11.

The member 12 is formed with threaded circumferential sections at different diameters so that an outer casing .15 and an inner casing 16 may be attached thereto, yet spaced from one another. A plurality of lateral or inclined passages 17 extend from the bore 14 of the member 12 to the annular space between the lower casings 15 and 16, while the lower ends of the passages 13 in the member 12 are in communication with the inner casing 16 which constitutes the upper barrel of the pump.

The upper barrel 16 communicates with a lower barrel 18 of reduced diameter through a-swaged niplple 19, and the upper and lower barrels toget er constitute a workingbarrel. Extending through the workin barrel sections 16 and 18, isa hollow va ve or piston 25 and at the upper end of the. piston head 'rod- 20 at either end of which is a piston there is a cage 26 in which the valve 23 is positioned. The lower piston head 22 likewise com leathers 27 and a 'i prises a plurality-of cu valve cage 28 to limit t e movementof the valve 24in a downward direction. The lower piston head 22 is attached to the lower end of the valve or-piston rod 20 by means of a crown 29 which is provided with a pin 30 to limit the upward movement of the valve 24.

as will presently be described, and actuated in any suitable manner. F or example, a walking beam 31 mounted on any well known type of Sampson post 31 and operated by a power actuated band wheel 31. may be used. Pressure fluid may be stored in a tank 32 which is provided with an outlet pipe 33 hav-- ing branch lines 3% and 35. The line communicates with the inner casing 11. which has already been described as being located in a well. The pipe 34 extends to and connects with anauxiliary pump 35 having a piston or plunger 37 (see Fig. 10) which is connected by means of a rod 38 to the walking beam 31. When the walking beam 31 periodically depresses the piston 3?, pressure is exerted through the lines 3d and 35 so as to forcepressure fluid into the inner casing 11. The pipe 33 is provided with a check valve 39 to prevent any upward fiow or return of liquid to the tank 32.

The pressure fluid passes downwardly through the casing 11 and thence through the bore 1 1- and out through the lateral or inclined passages 17 into the annular space between the casings 15 and 16. The lower end of the casing 15 which does not extend as far into the well as does the casing 16 is provided with a stufin'g box 40 so that when packing tland gland 42' are in position a seal'is effected between the lower end of the casing 15 and the inner casing 16. At a point immediately above the stufing box 40 the wall of the casing 16 is provided with a plurality of ports or openin s 43 so that the liquid passing downwardly lietween the easings 15 and 16 will pass into the working barrels consisting of upper and lower barrels 16 and 18 By reason of the fact that weight or sinker 4d.

the upper piston. head %1,'positioned within the upper barrel, has a larger effective surface area than the lower piston head 22, which is positioned within the lower barrel 18, the fluid pressure will operate to raise the piston upwardly.

The downward stroke of the piston is effected by ravity andin order to facilitate and make tlie downward movement more certain the valve rod 26 is provided with a This weight comes to rest in the swagged nipple 19 in such a manner as to limit the downward stroke, resilient means in the form of acoil sprin 45 being provided to reduce the shock as tie weight comes to rest.

On the downward stroke of the piston the valve 24: opens to permit oil to fiow into the hollow valve or piston rod 29. On each subsequent down'ward stroke of the piston more oil is forced into the valve rod and the excessbey'ond the capacityof the rod is forced out through the valve 23 into the pipe or tube may be returned to the storage tank 32 through a line 46 provided with a valve 4?.

Apparatus of preferred form and construction has been illustrated and described for the purpose of showing one way in which this invention may be practiced, but the inventive thought upon which the invention is based is broader than this illustrative embodiment thereof, and no limitations are in tended other than those imposed by the appended claims.

What I claim is:

1. Well pumping apparatus comprising a casing extending into a well, a hollow piston rod disposed within the casing and formed with two spaced piston heads of difi'erent diameters, means for introducing a pressure fluid between the piston heads for actuating the piston rod in the direction of the larger head,'and a weight on the piston rod for accelerating the return thereof at the end of each pressure impulse.

2. Well pumping apparatus comprising a casin extending into a well, a piston dispose within the casing and formed with two spaced piston heads of different diameters, means for introducing a pressure fluid between the piston heads for actuating the piston in the direction of the larger head, a weight on. the piston rod adapted to accelerate the return thereof at the end of each pres sure impulse, and resilient means in the cas ing for reducing the shock at the completion of the return stroke of the piston.

3. Well pumping apparatus comprising an upper pair of concentrically disposed pipes through the inner of which a fluid pumping medium is introduced, a lower pair of concentrically disposed pipes, the inner of which constitutes a pump barrel and is formed with a port intermediate its ends, a seal interposed in the space between the lower pipes at a point beneath the port in the inner pipe, a coupling member for connecting the two pairs ofpipes comprising a member formed with separate conduits connecting the inner pipe of each pair with the space between the pipes of the other pair, a hollow piston rod adapted to reciprocatewithin the lower inner pipe, means for limiting the movement of said rod, spaced valved piston heads on said rod, the upper piston head being of greater diameter than the lower piston head so that the pumping medium which is introduced through the aforesaid port in the in ner lower casing at a point between the piston heads will raise the piston by reason of I the larger diameter of the upper piston head.

4. Well pumping apparatus comprisin an upper pair of concentrically disposed pipes through the inner of which a fluid'pumplng medium is introduced, a lower pair of concentrically disposed pipes, the inner pipe be-' ing formed with a portion of reduced diameter extending below the lower end of the outer pipe .and provided with a port in its wall at'a point adjacent the lower end of the outer pipe, a seal interposed in the space between the pipes at a point beneath the port in the inner pipe, a coupling member for connecting the two pairs of plpes comprising a member formed with separate conduits connectin the inner pipe of each pair with the space etween the pipes of the outer pair, a

hollow piston rod adapted to reciprocate within the lower inner pipe, a valved piston head on the upper end of said piston rod adapted to form a working fit with the upper end of the inner pipe, a smaller valved piston head on the lower end of said piston rod adapted to form a working fit with the extended smaller portion of the inner pipe, and

means for forclng a pressure fluid through the port in the wall of the inner pipe to actuate the piston upwardly by reason of the larger diameter of the upper piston head.

In witness whereof I have hereunto set my hand and seal this 16th day of July, 1926.

ARTHUR B. STEEN.

Images