US1520400A

US1520400A - Swab

Info

Publication number: US1520400A
Application number: US674024A
Authority: US
Inventors: Boynton Alexander
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-11-10
Filing date: 1923-11-10
Publication date: 1924-12-23
Anticipated expiration: 1941-12-23

Description

@ &0 23, 1924.

A. BOYNTON SWAB f2 Sheets-Sheet Filed Nov. l0, 1923 Patented @en 235 )E240 entran stares Application led November 10, 1923. Serial No. Gslh T o aZZ wlw-m it may concern:

Be it known that l, ALEXANDER BoYN'roN,

a citizen of the United States, residing at' ing to allow the oil, water, or gas to enter the well.1

A further object of this invention is to provide a swab especially adapted for polishing and cleaning a casing and liner of a well for reducing and minimizing friction and' thereby facilitating the movement of the products of the well to the surface.

A further object of the invention is to provide a well swab which may be use'd as a pumpfin an ordinary working barrel in an eticient and expeditions manner.

A further object is to provide a swab which may be conveniently converted into a bailer.

g A further object is to provide a swab of highly simplified construction durable in use, and which may be operated without the exercise of a high degree of skill Other objects and advantages will be apparent during the course 'of the following description In the accompanying drawings forming a part of this application, and in which like numerals are employed to designate like parts throughout the same,

Figurel is a side elevation of the imsproved swab,

Figure 2 is a vertical sectional view through the same,

Figure 3 is a fragmentary perspective view of the improved swab,

Figure tis a sectional view of a slightly modified form of the invention,

Figure 5 is a horizontal sectional view taken on the line 5 5 of Figure 4.

Figure 6 is a horizontal sectional view taken on the line 6 6 of Figure 4,

Figure 7 is a horizontal sectional view taken on the line 7--7 of Figure t,

Figure 8 is a group perspective view of a portion of the invention, and

Figure 9 is a detail view illustrating a slight modification of the inventione In the drawing, the numeral 5 designates a tubular body upon which upper and lower rings or sealing members 6 are mounted. The rings 6 may be of rubber or other ma terial capable of expanding into engagement with the liner or casing of a well so as to out ofi? the passage of duid. Fi 2 plainly illustrates the expansible sea zng members or rings 6 which are securely held against endwise movement on the body 6 by inner and outer rings or nuts 7, and, of course, the holding member or nuts prop-- erly space the expansible rings 6 on the tubular body,

in carrying out the invention a protector 8 is mounted upon the tubular body and entends over the expansible members 6 lso as to prevent the expansible members from coming in destructive contact with the ends of the pipe sections, cracks, splits, seams, 'burs,or other imperfections in the pipe.

The protector 8 consists of a plurality of lengths of wire secured in any suitable manner to end rings 9 when are in turn held upon the tubular body by end ring fastening collars l0., It is important to note that the rings 9 consist of semi-circular sections to which the ends of the wires are connected and, therefore, the protector may be quickly divided when it is desired to detach the same from the swab More specifically, the protector consists of a pair of semi-circular sections which when assembled, as illustrated in Figure 1, will completely surround the expansible members 6 and effectively protect the same. rlhe end rings 9` are formed with end flanges 11 adapted to be received in the rabbeted ends of the collarsv 10'so that the collars not only hold the end rings against endwise movement but also hold the sections of the ring together. This feature of the invention is clearly illustrated in Figure 41.

The intermediate portions of the wires forming the protector are bowed inwardly into engagement with the body 5 and are held in position by means of an intermediate fastening ring 14. With reference to Figurev it will be observed that the intermediate fastening ring consists of a pair of semi-circular sections secured to the body 5 by means of screw bolts l5 or other suitable without causing the dart to seat. the swab has been raised to a point where` vgle rubber ring.

means. lVhen it is desired to detach the proplace, but also positively prevent objects kfrom entering the ring and the body.

Figure 2 illustrates' that a dart 16 is se` cured to the lower collar 10 by means of a valve seat 18 and contrary to usual practice the valve guard is held off its seat by means of a coil spring 20. The upper end ofthe dart is providedwith an extension 21 having its upper end formed with a head with which one end of the coil spring 2() is engaged and the other end of the spring is engaged with the top of valve seat 18.

In operation, the swab is lowered in the well and when raised the Huid pressure entering through the perforated nipple 20 is transmitted to the inside ot the expansible members G through the medium of apertures 22 in the body 5. This causes the rubber rings to ex and against the casing4 or liner so that if t 1e swab is raised all fluid above the rubber' rings is raised out of .the Well.

Two rubber rings are used because joints in the casing/and imperfections in the pipe might not be completely sealed `off by a sin- By using two rings one will hold while the other is passing a joint or imperfection inthe casing.

The spring 20 is of such tension that it normally holds 'the dart in its elevated or unseated position. When the swab is lowered too far into the Huid so that the load cannot be lifted by the hailing line, the swab is merely loweredl back into the fluid so that the pressure 'trom below equalizer: the pressure fromjabove the dart. At this point the dart will rise, whereupon the swab inay be slowly withdrawn by applying just enough power to move the same upward When the operator estimates the load can be lifted, he applies more power, thus increasing the upward speed of the swab which irrimediately seats the dart valve. If the load is still too great. the swab is lowered asbefore and again slowly withdrawn as before, but to a still higher level. j, This process is repeated until a proper load is .found to be above the swab, -whereupon the same is withdrawn from the well.

Special attention is directed to Figure 8 which villustrates that the. rings 6 are pro.- vided with longitudinal grooves 28 to receive the marginal portions of the. wires forming the protector. Ap roximately two-V thirds of the adjacent portlons of the wires are received in the grooves 28 vand as a result of continued use of the dart the ex* posed portions of the wire will wear so thatl a perfectly smooth surface is provided. In use the wires of the protector will wear about as fast as the rubber rings 6 and'a liquid tight connection between the casing or liner and the rubber rings will be provided. 3

One, two, three or more joints of pipe are threaded onto thel swab to give4 the swab sufficient weight to unspool the bailing line from the draw works and cause the swab to descend rapidly, notwithstanding the friction of the rings against the casing or liner.

The improvedv swab willpick up the fluid above the rubber rings and as the swabis being withdrawn a suction or-vacuum is crcated below the same. This suction or'vacuum thus created enables gas, oil, or water to break through any obstructions surround inggthe liner and thereby enter the liner. This swab polishes `and cleans the casing and liner of the well for reducing friction and thereby facilitating the discharge of the liquid or gas.

Also the swab may be used as a plunger pump in an ordinary working barrel. As a pump it is highly efficient until the rubber rings completely wear out; whereas, the ordinary cups begin to lose their efficiency from the period of first use.

Also the swab may be converted into a washing tool bv omitting the perforated nipple 20 and substituting a perforated body for the main body 5.

To remove Water or slush from beneath the oil in a Well two or more joints are screwed onto the pipe above the swab to provide the necessary weight and a bailing line is fastenedto the top of the same with an ordinary open bailer top. This form of the invention is illustrated in .Figure 4 wherein it shows that the dartin this case is not employed. By letting the swab or bailer as now constructed down below the oil and into the water or slush and withdrawing the same from the well the water or slush is brought out of the well and the oil is allowed to escape down through the open pipe or bailer.

In the form of the invention illustrated in Figure 9, the lock nuts() are provided with inwardly directed annular. flanges 51 received in annular grooves received in oppo' site edges ot packing ringe 52. wherebyvv to provide an eflicient seal between the lock and, therefore, enables the invention to operate with a high degree of eliciency.

1. A tool of the character specified comprising a body having discharge means, an expansible packing member mounted onl said body and surrounding said discharge means, and a protector surrounding said expansible acking member and consisting of a plural- 1ty of separate sections.

2. A tool of the character specified com- Pprisingl a body having discharge means located at spaced points, expansible sealing means mounted on said body and surrounding said discharge means, said V.expansible sealing members being adapted to contact with the interior wall of a liner or casing, and a protector surrounding said eztpansible sealing members and consisting of a pair of separate sections.

3. A tool of the character specified comprising a body having discharge means located at spaced points, expansible sealing means mounted on said body and surrounding said discharge means, said expansible sealing members being adapted to contact with the interior Wall of a liner or casing` a protector surrounding said expansible sealing members and consisting of a pair of separate sections, and means encircling the intermediate portion of said protector for connecting the intermediate portion. of the protector to the body and for holding the sections of the protector together.` v

4. A tool of the character specified comprisin a body having discharge means, expansibe casingV and liner contact members mounted on said body outwardly of said discharge means, a protector surrounding said sealing members and consisting of a,

plurality o eparate sections, and a fastening ring surrounding the intermediate portion of the protector for connecting the sections of the protector to the/body.

5. A tool of the character specified comprising a body having discharge means, expansible casing and liner contact members mounted on said body outwardly of said discharge means, a protector surrounding said sealin members and consisting of a plurality o separate sections, and a fastening ring surrounding the intermediate portion of the protector for'connecting the sections of the protector to the body. said fastening ring consistingloa plurality of arcuate sections.

6. A tool of the character specified comprising a body havin discharge means, expansiblecasing and iner contact members mounted on said body outwardly of said discharge means, a protector surrounding Said sealing members and consisting of a plurality of separate sections, and a fastenv prising a body,

ing ring surrounding the intermediate portion. of the protector for connecting the sections of the protectorvto the body, said fastening ring consisting of a plurality 'of arcuate sections, and means connected to said body and receiving the end portions of said protector whereby to hold the sections of the protector to ether.

7. A tool of ne character speciiied comcasing and liner contact members mounted at spaced `points on said body, a protector surrounding said casing and liner contactmembers and consisting of va plurality of separate sections, and

means mounted, on said body and having interfitting` connection with the ends of said protector to hold the sections of the protector together and in position.

8. Al tool of the character specified comprising a body,casing and liner contact members mounted at spaced points on said body, a protector surrounding said casing vand liner contact members and consisting ot a vplurality of separate sections, means mounted on said body and having interfitting connection with the ends of said protector to hold the sections of the protector ,together and in position, and means securely connecting the intermediate portion of t e protector to the body.

9. A tool comprising a body having discharge apertures, expansible sealing members surrounding said apertures, locking rings mounted on said body and enga ing opposite ends of said sealing members, t ere being an intertitting connection between said locking rings and said expansible sealin members, and a protector securely connected at its intermediate portion to the body and xtending over said expansible sealing memers.

10. A tool of the character described comprising a body, a casing and liner contact l,members mounted at spaced points on said body, a protector surroundlng said casing and liner contact members and consisting of separate sections, each section consisting of lengths of wire, arcuate attaching members connected to the, ends of said wires and provided with'a flange, and collars mounted on said body and receiving said flanges.

11. A tool comprising a pair of 'spaced casing and liner contact members having longitudinal grooves, -a protector consisting of a plurality of lengths of wire, partially received in said grooves, protector being provided with sectional rings having anges, and collarslreceiving said flanges whereby to connect *the sections of said rings and to hold the protector in position.

ALEXANDER BOYNTON.

the ends of said`