US1663228A - Sectional barrel for oil-well pumps - Google Patents

Description

March 2o, 192s'.y

J. A. ZUBLIN SECTIONALl BARREL FOR OIL WELL PUMPS Filed Feb. 16,. 1925 Patented Mar.' 20, y1928.

-UNITED STATES JOHN A. ZUBLIN, F LOS ANGELES,'CLIFORNIA.

SEVCTIONAL BARREL FOR OIL-WELL PUMPS;

Application led February This invention relat/es to the oil producing industry, and it particularly concerns oil well pumps.

It is customary to pump oil 4from a well by 5 means of a pump situated at the lower end 'thereoi- The .working barrel of such a pump is secured at the lower end of a pump tubing which extends upwardlyI throughthewell, and the pump plunger of such a pump l0 is attached yat the lower end of a string'- of sucker 'rods which extends upwardly through the pump tubing and is connected with a walking beam, which walking beam recipro- 'cates the pump plunger by means of the sucker rods. v

There are several types of working barrels forpumps of this character, such as one' piece barrels and liner barrels. A onepiece barrelconsists/'pf a tubular member of one length whiclrZrs-bored and reamed to proper size. A line/1i barrel consists of an outer jacket in which a plurality of short liners is assembled. These liners are finished to proper size and are secured in alignment inside'the jacket by means of upper and lower collars which are secured to the ends of the jacket..

Itis sometimes desirable to increase the length of the pumping stroke of the plunger 3U. in order to increase the production of the well. In order to make such an increase, it is necessary to have a working barrel which is proportionately longer.

and should such an increase in the pumping stroke be provided, the barrel must bere Y It is an object ofmy invention to provide a working barrel which may be lengthened as desired and which may be lengthened on the job. When the pumping stroke is increased the working barrel of my invention may be facilely increased accordingly.

It is another object of my invention to provide a. sectional working barrel. I provide my invention'inthe form of a number of tubular sections and collars for securing said sections together. When it is desired to lengthenl the working barrel, an additional section is included in such barrel.

It is also an object of my invention to provide a Vsectional working barrel of this character which ls so constructed-that the see- In the.present' Itypes of barrel, the lengths are standard thereof to accommodate the pumping stroke.

'l1- 4 of Fig. 2.

16, l1925. Serial N0.9,673.

tions may be accurately aligned in absolutely fluid-tight relationship. vEach end of each of thesect-ions is .accurately turned down and ground so as to provide a sleeve portion, andvadjacent to each of the sleeve portions 1s provided a male thread formation. lEach of the collars is provided with a centra-l cylindrical portion whichv is accurately ground -to a( size. corresponding with the sleeve portions ofthe sections. \Adjacent to the central cylindrical portion is provided female thread portions. The fit between the sleeve portions" and the central portionl is an accurate sliding lit, whereas t-he lit between the male and female thread portions is a' lVhcn two sections are secured to`` loose fit. gether by a coupling, the sleeve portions thereof extend into thecylindrical portion of the collar, and the male thread portions are threaded into the female thread portions of the collar. The sections arethreadedinto the collar until the adjacent ends thereof,

which are accurately ground, abut. This abutment between the ends and theclose fit between the sleeve portions and the central cylindrical portion renders the barrel fluidtight. By providing an accurate. fit between the sleeve portions and the cylindrical Vportions an accurate alignment between' the various sections is provided, and by making the male and female thread portions of a loose fitting Dnat-ure any-inaccuracy of the threads will not be effective in throwing the sections out of alignment.

Otherobj'ects and the especial advantages of my invention will appear in the following description.

Referring to the drawing whichuis for illustrative purposes only,

utility of myinvention.

Fig. 2 is 'an enlarged fragmentary' sectional View showing a working barrel emj bodying the features of my invention.

' 100 Fig. 3 is. an enlarged fragmentary sec-l tional view clearly showing the collar construction and the lend construction of the sections.

Fig. 4 1s an enlarged cross sectional vlew taken substantially as indicated by the line -tendng through the pump tubing 12 is a.

sucker rod string 14, this sucker rod string I show a pump lllsecured i' Fig. 1 is a diagrammatic View showing the `3, botliends of each section 20 are provided vwith a sleeve portion 25. This sleeve portion 25 has an outer. face which is concentric with an inner face 26 of each of the .sec` tions 20, and which is accurately ground to a certain size. 20 is also accurately finished olf and ground.

'Adjacent to each of the sleeve portionsv 25 is formed a male thread portion 30.. When adjacent sections are secured together by a 'collar 21, sleeve portions 25 of these adjacent sections 20 extend into a central cylindrical portion 32. This central cylindri- -cal portion 32 is ground so as to be an accurate close tit with respect to the outer faces ,'27 of the sleeve portions 25. The. male thread portions 30 engage female thread vportions 33formed"in a collar 21 at eachside of the central cylindrical portion 32. The male threads 30 and 'the female threads 33 are of a loose fitting relationship, as clearly shown in Fig. 3.A The male thread portions 30 are screwediuinto the female -rthread portions 33 .until ends 28 of the' sections 20 contact each other, as shown in Flg. 3, these ends'being tightly clamped together.

I. tweenthe male and female thread ,forma-5 lois The features of providing accurate slidingv tsbetween the sleeve portions 25 and the central cylindrical portion '32, and providing a loose fit between each of the thread portions 30 and 33 assure the accurate aligning of each of theV sections 20.y The accuracy of fit between the portions 25 and 32assures aligning, and by providing a -loose lit betions no interferenceto lthis alignment can be present because ofl any'inaccuracies .in the threads. The forcefull contactbetween the abutting ends 28 assuresa non-leakage of the barrel between adjacentnsections 20.

When machinlng a section 2() it is held 55 by a suitable' chuck at the'center thereofand the inner face 26 is accurately finished to size. The thread formations 30 andv the sleeve portions 25 are also turned and iin-- ished 'accurately to size without] removing the section from vthe chuck. In this manner the inner face 2 6, the face 27 of the sleeve portion 25 and the thread formations 30 are all formed concentrically and absolutely true. l.

The upper collar 19 is provided 'with a cylindrica `portion 40 and a female threaded Each end 28 of each section.

portion .41 to permit a securing of an upper o f the sections v20 thereto, and the lower col- "lar 22 is provided 'with a 'cylindrical portion 42 and a female portion 44 to permit a securing of a lower of the' sections .20.:

From the drawings' and description 1t 1s evident that a sectional working barrel of my invention is of practical construction and provides a valuable Jfeature not possessed by the present working barrels. It is obvious.

that by adding a desired number of'sections to the barrel the length of the barrel may be increased as desired. Further, this ad dition may be made at thewell due' to the simple construction of the sections and collars, which assures an accurate aligning and non-leakage.

Although I-have shown a single embodiment of my invention, it should be clearly understood that various modificaations 'and various other constructions may .be made entirely by the appended claims.

I- claimas my invention: f

1. In combination Hin an oil well pump, a working barrel .comprising:` a plurality of .without departing from the spirit'and scope of my invention which should be construedsections, said sections having sleeve portions ateach end thereof and havingmalethread vformations adjacent to said sleeve portions;v and collars for holding` adjacent sections to' gether, each ofsaid collars' having a central cylindrical portion into which sleeve portions of adjacent sections extend and female vthread formations into which male thread formations of adjacent sections thread, en-

gagement between said 'male and female.

portionsV holding the ends of saidv adjacent sections in abutting relationship.

' 2. A combination as in claiml in which said sleeve portions and said cylindrical portions are a ground fit. l

3. A combination as in claim 1 in ,which said male and female thread-formations are alooseffit.- 1

\ 4. In combination in an oil well pump, a`

working barrel comprising: a plurality ofl` sections, said sections having sleeve portions at each end thereof Aand having maley thread .formations adjacent to said sleeve portions;

and collars -for holding vadjacent sections together, each ofsaid collars having a central cylindrical;= portion into which sleeve p'o'rtions' of adjacent sections extend,` and with which central (portion said sleeve portions. form a groun it, and female thread formations into Vwhich said male thread for:v mations of adjacent sections thread, said'l thread formations engaging with a loose iit`- said engagement holding the ends of saidl vadjacent sections in abutting relationship.

'In testimony'whereof, I have hereunto set my hand atLos Angeles,.Cal ifornia, this 9th day of February, 1925.'

JOHN A.- ZUBpiN'. l I

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