US2372191A - Vacuum pump - Google Patents

Description

March 27, 1945; J. EGER vAcUUM PUMP Filed May 5. 1944 FIG. 3.

INVENTOR.

' Jahn Eger ATTORNEYS.

FIQ.- 1.

Patented Mar. 27, 1945 cls VACUUM PUMP J ohnA Eger, Cut. Bank, Mont., assigner of one-half to S. D. Whetstone, Cut Bank, Mont. y

Application May 5, 1944, serial No. 534,32i 3 claims. (o1. 10s-,184) p This invention relates to oil well pumping equipment.

The primary object of this invention is the provision of oil well pumping equipment including oil' well pumping means to create suction in the oil sands so as to form a partial vacuum at a `desired depth in the oil sands in combination with auxiliary pumping means to increase the ilow of oil.

Other objects and advantages ,of the invention will be apparent from the following detailed dey scription.

w In the accompanying drawing, forming a part .of this speciiication and wherein similar reference characters designate corresponding parts thruout they several viewslFigure 1 is a side elevation, partly insection, showing details of the pumping equipment down to the lower end of the main working barrel.

Figure 2is a view partly in side elevation and partly in section showing the lower portions of the equipment below the main working barrel.

Figures 3 and 4 are cross sectional views taken substantially on the respective lines in Figure l of the drawing.

Figure is a fragmentary cross sectional view showing how certain valve means of the pumping equipment is operated to create a partial vacuum in the oil sands below the main working valve. In the drawing, wherein for the purpose of illustration is shown only a preferred embodiment of my invention, the letter A may generally designate the pumping equipment. It includes a conventional oil well casing a, seal-01T packer I I is connected by coupling means I2 to the tubing i0. The seal-off packer II is connected by a similar coupling I3 to the upper end of the main working barrel I4. A Vsucker rod string I5 is provided inthe tubing and working barrel I4. In the latter it is provided with plunger means 20 consisting of the conventional cups 2| and traveling valves 22 and 23. The latter have conventional cages and balls of a nature well understood by those skilled in the art to which this invention pertains. At the lower end of the main working barrel I4 I provide an annular flange 30 internally screw threaded at 3| to receive a screw threaded portion 32 of a tubing piece 34. The'latter, at its lower end, is screw threaded at 3B into into additional tubing 31, providing what I prefer to term an auxiliary working barrel 38, vshown in Figure 2 of the drawing. The main working barrel I4 at its lower endmay havea detachable extension portion 5U screw threaded at 5I thereto and forming a continuance of said main working barrel; the portion providing an internal annular valve seat flange 55. i Both of theianges 30 and 55 are provided with vertically disposed openings therein, and respectively above these valve seat flanges there are provided ring- shaped valves 63 and 64 adapted to unseat with respect tothe passageway 60 upon the'upstrole of the plunger mechanism in the main working barrel 'for the purpose Vof creating suction in the oil sands below the main Working barrel and thus creating a zone of suction tending to create a partial' vacuum in the -oil sands below the main working barreVsuri-ounding the auxiliary working barrel 38 and therebelow any oilin the casing at the level ofthe ducts 60 will also be drawn into the working barrel I4, at this point.

The sucker rod assembly I5 includes a rod4 portion` liljgextending freely thru the tubing 31 and into` the auxiliary working barrel 38, where the -same isprovided with a conventional plunger mechanism 15, including cups 16 and traveling valves 11 and 18. At the lower end ofthe auxiliary working barrel 38 there is provided an anchor or standing valve assemblage 19, including the usual parts well known to those skilled in the art to which the invention relates.

In operation, as the sucker rod assembly I5 is` on the upstroke, the 'plunger mechanism 2D operating in the main working barrel I4, will thru manipulation of the valve mechanisms at the lower end of the main working barrel, create a suction in the oil sands externally of the tubing forming the auxiliary working barrel 38. If the oil extends in the level of the lower end of the working barrel I4, the oil of course will be pumped into the main working barrel thru the openings 60. Since the sucker rod assembly extends into the auxiliary working barrel 38, the plunger equipment therein will operate to draw oil from the oil sands in the vicinity of the zone of suction or partial vacuum which has been created by the plunger mechanism in the main working barrel and draw oil from the oil sands thru the standing valve 19 into the auxiliary working barrel, from whence it is pumped upwardly thru the tubing 31 into the main working barrel and thence upwardly thru the tubing to the point of discharge.

In conventional practice the main working barrel I4 may have a diameter of five or six inches and the auxiliary working barrel may have a diameter of two or three inches. These dimensions are `not to be considered as restrictive, since they can be departed from, as is quite obvious. Indeed, it is not necessary to vary the dimensions o the main and auxiliary working barrels, since they could be the same; the important part being that a zone of partial vacuum is created in the oil well casing and sands below the main working barrel. I have found that with an oil well twelve hundred feet deep, if onethird of the weight of the tubing is placed upon the packer, the latter will seal-off the oil well casing and with the tubing in the proportions above specified, I will obtain an increased iiow of oil from the Well of from twenty-ve per cent to fty per cent.

Various changes in the shape, size and ar rangement of parts may be made to the form of invention herein shown and described without departing from the spirit of the invention or the scope of the following claims.

I claim:

1. In an oil well pump the combination of tubing having a seal-of! packer thereon, a working barrel, a sucker rod assembly including a plunger and a traveling valve operating in the working barrel, valve means on the lower end of the working barrel operable upon the upstroke of the plunger to create a zone of suction in the well exteriorly of the tubing below said valve means, a tube connected to and supported by the working barrel depending below the working barrel and below said valve means and located in the said zone of suction, and a plunger and traveling valve connected with the above mentioned sucker rod assembly and operating in the last mentioned tube for sucking oil into said tube from the above mentioned zone of suction in the Well.

2. In oil well pumping equipment the combination of tubing adapted to be placed in an oil Well casing, packer means connected with the tubing for sealing off the well casing between the same and the tubing, a working barrel conmeans associated with the working barrel, a sucker rod assemblage including plunger and traveling valve means operating in the working barrel above said first mentioned valve means for creating suction in the well'exteriorly of the pumping equipment below said valve means which is associated with the Working barrel, an auxiliary working barrel, means connecting the auxiliary working barrel with the iirst mentioned working barrel so as to extend into the suction area in the well below the main working barrel, and plunger means connected with the sucker rod assemblage operating in the auxiliary working barrel for drawing oil thereinto and lifting it into the main working barrel.

3. In oil well pumping equipment the combination of tubing, a seal-off packer connected with the tubing, a main working barrel, a sucker rod assembly, a plunger assembly connected with the nected with the tubing below said packer, valve sucker rod assembly operating within the main working barrel a valve seat connected with said working'barrel below the plunger assembly having port means opening directly into the well, a valve operating upon said valveseat adapted to be unseated upon the upstroke of the plunger assembly in the main working barrel for creating suction in oil well sands below said main working barrel, tubing connected to and supported by the main working barrel extending below the valve at the lower end of the main working barrel into the Zone of suction which is created in the well sands as an incident of operation of the plunger assembly in the main working barrel,v said last mentioned tubing including f a second working barrel, plunger means connected with the sucker rod assembly and operating in said second working barrel for drawing oil thereinto and lifting it upwardly into the main working barrel.

JOHN EGER.

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