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Патент USA US2113098

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Patented Apr. 5, »193s
’ 2,113,098
Percy B. Skinner, Tulsa, Okla.>
applicati@ ,my 5, 1935, serial No. 29,933
(Cl. 286-31)
Figure' 3y is a transverse, yvertical ì sectional '
This invention relates to’new and useful im- ’
2' Claims.
provements in packers.
view taken on the line 3-'-3 of Figure 1,
Figure 4 is a transverse, vertical, sectional view
One object of the invention is to provide an
of a stuffing box having a plurality, of said rings ,
improved packer which is particularly adapted
mounted therein, and showing said rings in a 5
5 for use in packing oif the polish rod of an oil
well, or other element.
normal position, and-
Í -.
Figure 5 is a view similar to Figure 4 and
An important object of the invention „ist to
rality of superimposed packing rings which are
showing the packing rings distorted into packing
engagement with the polish rod.,
arranged to surround an element extending
through the packer, the rings having their upper
cylindrical body, or housing which is providedy
provide an improved packer including a plu
In the drawing, the numeral I0 designates a .
and lower peripheral surfaces convéx whereby
with an axial bore Il. 1 The lower end of the bore ’
the line of contact between- said rings ,is oom
visreduced at I2 to form an internal, annular »
paratively small, and also whereby annular 'shoulder I3 Awithin the body. The upper end ofl
the bore is vprovided with screw-threads I t,
which' provides ample distortion Vspace when whereby a ,follower I5 may be threaded there- “
spaces or channels are formed between the rings,
pressure is applied to said rings to move them
into packingî relation with said element.
Another object of the invention is to provide
’ an improved packer including a plurality of
superimposed resilient rings adapted-to engage
the outer surface of a reciprocating element to
pack off the same, said rings being so constructed
that only a minimum pressure is necessary to
i distortsaid rings into packing position, the dis-,
tortion of the rings causing the entire inner'sur
face of each ring to engage the element, whereby
The follower is formed with an axial bore »I6
which has the same diameter as the diameter
of the reduced portion I2 of the bore of the hous
ing. Thus, a polish rod A, or other element may
pass upwardly through the housing and through
the follower. It is notedthat the element has a f
loose ñt in the reduced portion I2 and the bore
I6 of the _follower because the diameter of said
element is less than? the diameter of said -reduced ì
portion _and said bore. The -above described
an equal packingaction throughout the length i parts are ofthe ordinaryoconstruction and are,
therefore, subject-to variation.
of the rings is had, which provides for a maxi
' vmum packing area.
A further object of the invention is to pro '
In carrying out the invention, a plurality of
resilient packing rings I1 are superimposed with
vide a pluralityVA of superimposed `resilient rings in the bore I I, the lowermost ring being support
which surround a reciprocating element and ed onthe annular shoulder I3. ’The rings may .
which, when distorted, >move into ,packing en ‘be constructedof rubber, rubber compound, orv
gagement with the lelement, said rings being. con-`
structed so as to positively Vengage the~ ele
ment without pulling away from said element
due to the pressure attempting to escape there
by, which affords a perfect seal, the construction «
46 of said rings further permitting »a limited lateral
movement or wobble of the element without
_breaking said seal.
other suitable ?naterial,-` and, as clearly -shown
in Figures 4 and 5, completely encircle the polish
rod A. _Since each' ring is constructed in exact
ly the same way, it is believed that a description _
of one ywill suiiice.
Each ring has its upper and lower faces con 40
vex, or curved outwardly at- I8 (Figure 3) .` This
convex portion does not extend the entire width
A construction designed to carry out vthe in
the ring
at the
edge annular
portion of
the top I9and
is _` Iy
veiítion will be hereinafter described, together i bottom of the ring.` /The ringr Vis provided with 45
45 with other features of the invention.
an inclined radial slit 20 which extends the width
The invention will be more readily understood of the ring and facilitates'the positioning of the
Afrom a reading of the following specification and ringswaround the rod and in the bore"
he hous
by reference to the accompanying drawing, in
which an example of the invention is shown, and
When the rings have been pla-ecl-Av n the bore 50k
Il of thebody, as shown in Figure 4, it will be
Figure 1 is aplan view of .one ofthe packing
rings, constructed in accordance with the inven
Figure 2 is a side elevation,
seen-that vthe lowermost ring-restsI on the shoul-f
vder i3, while the other rings are-.supported on
each other. liuc to the curved or convex portion f
I 8_0! each ring it will'ïbe obvioii'sfthat there> is_ 55 f
only an annular line of contact 2l, at the top of
the curve, between each ring. Thus, annular
throughout the entire length of the packing rings
spaces or channels 22 are formed at the inner and
is had.
outer edges of the rings between said rings.
The pressure, as has been pointed out, is ap
plied medially to the annular convex end faces of
When the rings are in a normal position, they are
in the position shown in Figure 4, with their outer
peripheries 23 disengaged from the bore II, and
their inner peripheries 24 disengaged from the
to`be distorted equally, whereby equal packing
Whenthe follower I5 is rotated toV move down-V
each ring and, therefore, the inner peripheral
5 .
face 2,'4 of each ring is held in tight engagement
with the surface of the rod `A and the outer
peripheral face -23 of the ring in engagement with
the cylindrical wall'of the body I0. Therefore,
wardly into the bore of the body, the lower end of _ the pressure of fluid against the packing rings -10
said follower engages the convex portion I8 of cannot force the lowermost packing ring to pull
the uppermost packing ring I'I, thereby com
pressing the rings between the follower and
away from the surface of the rod A, as is the
case in the flat packing ringsv of the usual con
15 shoulder I3. As the endwise `pressure on saidV struction. Although three packing rings I‘I have
rings is increased, it will be seen that the rings been shown, it is pointed out that any number
will be distorted with laterally spreading now
both inwardly and outwardly on opposite sides
of the annular initial line of contact between the
convex end faces of the rings. Since the annular
spacesv or channels are provided, the rings will
may be employed. Further, the rings are not
to be limited to packing off a polish rod but may
be utilized in any suitable way for any desired
What I claim and desire to secure by Letters
naturally distort into these spaces because of the Patent is:
lack of resistance.A Thus, the concentration of
1. A rod packing comprising a plurality of de
the pressure at the middle of the annular convex formable rsolid rings of rubber or like material,
end portions of the ring, together with the pro
each ring'having annular convex opposite >end
vision of the annular spaces or channels, causes -faces joined at their outer margins by a cylindri
the rings to be distorted so that the entire inner cal peripheral surface and at their inner margins
peripheral face 24 snugly engages the surface by substantially radial flat annular opposite end
of the polish rod A. At the same time, the en
faces which terminate at and join a. cylindrical
30 tire outer~ peripheral face 23 of each ring-moves
bore, said rings being adapted to be disposed in
into close engagement with the bore II of the a. stuiling box and surround a rod therein with 30
housing (Figure 5).
` ‘
their convex end face portions superposed and
So long as the follower is in a lowered position
the rings remain in their packing position `and
fluid cannot by-pass the- rod. Since the entire
peripheral faces of the rings engage the rod A
yand bore II, it is obvious that the' maximum
packing area of each is utilized. Further, since
the endwise pressure is applied to each ring in
the region of the initial annular median line of
contact between the convex end faces of the ad
joining rings, and due td the annular channels
which permit ready distortion, only a minimum
vof pressure need ’be exerted to move the rings
46 into their packing position.
in substantially medial annular line engagement
with each other, and means for applying endwise
pressure to said rings throughout the body por
tions thereof in the region of said line engage
ment of the annular convex end portions of the
rings sufficient to effect an intimate engagement
of the peripheral surfaces of the rings with the
rod and the wall of the stuilìng box through dis 40
vtortion of the component material of the rings
with laterally spreading flow thereof.
2. A deformable solid packing ring of rubber
' or like material, having a cylindrical outerv pe
ripheral face, a cylindrical bore, annular convex
opposite end faces adjacent to and joining at
their outer margins with the cylindrical outer
spaces or channels are not completely ñlled with
'peripheral face of the ring, and substantially
the distorted material of the rings. This per
radial flat annular opposite end faces adjacent
50 mits the rod A_which is loose in the reduced por
to and joining at their inner margins with the
tion I2 of the body bore and in the bore `>IIì óf cylindrical bore of the ring, said flat faces joined
the follower, to undergo a hunted lateral move
at their outer margins with the inner margins
ment, without breaking the seal. Such lateral of said convex annular end faces of the ring, said
movement would merely distort the. rings further ring in use'being subjected to endwise pressure
into the channels. This 'lateral movement, or
and concentrically of its convex annular 55
wobbling occurs in the polish rod of an oil well . medially
end .portions and thereby distorted with laterally ^
and thus, it will be _seen the invention is par
spreading flow of the component material
ticularly adapted for such use, although it is not throughout the entire body whereby to effect an
to be so limited as it may be used elsewhere.
intimate engagement of the outer peripheral and
60 .It is further pointed out that due to the single
the bore surfaces of the ring respectively with 60
initial contact line 2I between the rings, a pres
the wall of the stuffing box and a rod therein.
sure maintained on said rings in the region’ of
It is noted that when the rings are distorted
into the packing relation (Figure 5), the annular
said line on opposite sides thereof causes them
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