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Патент USA US3063774

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Nov. 13, 1962
3,063,764
’ H. H. LOWERY
WIPER FOR PLUNGER PUMPS
Filed Jan. 3, 1961
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#5800 A4 LOWEQY
INVENTOR.
BY z/iw’gwx
Unite States Patent Ii:
1
(If?
3,063,764
Patented Nov. 13, 1962
2
3,063,764
ternally threaded portion 13 and the other end 14 is
provided with an internally threaded portion (not shown).
Herod H. Lowery, 124 Woodlawn St., Taft, Calif.
Filed Jan. 3, 1961, Ser. No. 80,250
3 Claims. (Cl. 309—54)
A series of grooves 15 are provided in the exterior sur
face of the body 12.
A length of packing material is positioned in each
WIPER FOR PLUNGER PUMPS
groove 15 to form a packing ring 16. The packing ma
This invention relates to apparatus for use in pumping
oil from oil wells and in particular relates to a device to
be used in conjunction with a plunger type pump.
terial is preferably square or rectangular in cross-section
as best shown in FIGURE 3. While any suitable pack
ing material may be used, I prefer to use a composition
In pumping the ?uid from an oil well one of the con 10 which expands when ‘brought in contact with the crude
ventional methods employs the use of a plunger with a
oil present in the well in which the \wiper is to be in
central bore. The exterior of the plunger closely ?ts
stalled.
the interior of a liner or tubing so that when the plunger
The width of each groove 15 between radially extend
is lowered any ?uid below the plunger is forced up
ing surfaces 17 is smaller than the width of the packing
through the bore in the plunger. By the use of appro 15 material, thereby requiring the packing material to be
priate check valves the ?uid is progressively raised to the
forced into the groove 15 and discouraging subsequent
surface by continued reciprocation of the plunger.
disassembly. The radial depth of the groove 15 is adapt
When the exterior ofithe plunger or the interior of
ed to accommodate and support the packing material for
the liner or tubing adjacent the plunger becomes worn,
engagement with the cylinder in which it is inserted.
the ?uid bypasses the exterior of the plunger rendering 20 A ‘wiper 10 is installed on each end of the pump plung
the pump ineffective. In numerous oil wells there are
‘er 18 which plunger may be of any ordinary design.
sand particles suspended in the ?uid being pumped which
The plunger has a central bore 19 communicating with
acts as an abrasive to increase the objectionable wearing
V the central ‘bore 11 in the wiper body 12 to provide a
of the plunger. Further, the presence of sand between
passage for the ?ow of the ?uid being pumped. The
the plunger and the liner or tubing encourages the plung 25 plunger-wiper assembly is reciprocated in the tube 20
er to stick on the downstroke rather than dropping freely
which may be oil well tubing or a liner. The diameter of
to begin the next upstroke.
The rapidity of wear and the cost of each replacement
the outer surface 21 of plunger 18 is just slightly less
in some wells can create an uneconomical and objection
able maintenance condition resulting in a relatively un
pro?table oil well.
Although some plungers are available with cups which
reduce the effects of the sand on the plunger, these plung
ers are incapable of operation in relatively deep wells.
Also, if the stroke of the plunger carries any of the cups 35
than the diameter of the inner surface or pump barrel
22 of the tube so that no appreciable amount of ?uid
may ?ow past the outside of the plunger.
The diameter of the outer surface 23 of the wiper body
12 is less than the diameter of the outer surface 21 0f
plunger 18 thereby permitting ?uid ?ow between the ex
terior of the wiper ‘body and the interior of the tube 20.
However, this ?ow between the tube and the wiper is
inhibited by the packing rings 16 which are of su?icient
outside diameter to circumferentially engage the ‘bore of
the tube 20.
In operation the packing rings 16 serve to wipe the
out of the liner or tubing those cups will be damaged and
rendered ineffective.
Accordingly, a principal object of this invention is to
provide a plunger of the type described with means for
preventing sand from coming in contact with the exterior 40 bore of the tube 20 as the plunger-wiper assembly is re
of the plunger.
Another object of this invention is to provide a device
ciprocated thereby preventing any solid impurities such
as sand from coming in contact with the exterior of the
plunger. The series of rings 16 is provided to present
a multiple barrier to exclude solid impurities and allow
protect the plunger from sand present in the ?uid.
Another object of the present invention is to provide a 45 for wear without requiring placement. Also, as each
ring 16 wears, if the preferred material is used, it will
device to reduce the wearing of a plunger caused by sand
which can be installed on any oil well pump plunger to
and which has means for excluding the sand capable of
conforming to the exact shape of liner or tubing.
Another object of this invention is to provide a de~
expand to compensate for that wear.
vice having means which compensate for wear and ex
wiper 10, thereby providing optimum durability with a
clude sand from the plunger.
Another object of this invention is to provide a device
which may be reciprocated beyond the liner or tubing
without rendering it ineffective.
Other and more detailed objects and advantages of
this invention will appear from the following description
and the accompanying drawings.
In the drawings:
A relatively small space is required between the grooves
15, thus permitting a great number of rings 16 in a short
minimum increase in the length of the pumping appara
tus.
Having fully described my invention, it is to be un
derstood that I do not wish to be limited to the details
herein set forth or to the details illustrated in the draw
ings, but my invention is of the full scope of the append
ed claims.
I claim:
1. In a wiper adapted to be connected to either end
FIGURE 1 is an elevational view of the device, without 60
of a well pump plunger, the combination of: a tubular
body having threaded connecting means on each end, a
ment of this invention.
plurality of axially spaced and circumferentially extend
FIGURE 2 is an elevational view of two of the de
ing grooves in the exterior surface of said body, a ring of
vices installed on either end of a conventional plunger
the packing elements, constituting the preferred embodi
compressible-expansible packing in each said ‘groove, and
and shown in a liner.
65 the diameter of the exterior of said body being every
FIGURE 3 is an enlarged detail of a sectional view
where substantially less than that of the plunger whereby
taken substantially on lines 3-3 of FIGURE 2.
the ?uid pumping is accomplished by the said plunger.
FIGURE 4 is a sectional view taken substantially on
2. In a wiper adapted to be connected to either end of
lines 4-4 of FIGURE 3.
a well pump plunger, the combination of: a tubular body
Referring now to the drawings, the wiper, generally 70 having threaded connecting means on each end, a plu
designated 10, has a central bore 11 extending through
rality of axially spaced and cincumferentially extending
body 12. One end of the body is provided with an ex
grooves in the exterior surface of said body, a ring of
3,083,764
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‘
"
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>3
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4
compressible-expansible packing .in each said groove, each
said ring having a normal outside diameter equal to ‘or
greater than the outside diameter ‘of the plunger, and the
"
References Cited in the tiletof this patent
UNITED STATES PATENTS
diameter of the exterior ;of said ‘body ‘being everywhere
Re_ 20574
Martin _V_ ____________ __ D66' 7, 1937
substantially ‘less than that .of the plunger whereby the 5
1 549 940
(Wells gt a1
?uid pumping i_s aqwmplished 'by the said plunger- _
1’588’705
Cape et a1" """""" “ June‘ 15’ 1926
_ 1,923,040
Pippin ______________ __ Aug‘ 5’ 1933
3- The combination of claim 2 In which the material
of the said rings expands substantially when brought in
contact with the ?uid pumped whereby the said rings
compensate for wear thereof.
10
Aug 18 1925
2,097,629
LOWETY ------------- -- NOV- 2, 1937
2,344,687
Fischer et a1. _______ __ Mar. 21, 1944
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