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Патент USA US2410976

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Nov. 12, 1946.
H. F. JOHNS
2,410,976
OIL WELL PUMP PACKING
Filed Sept.y 23, 19434
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‘2,410,976
~lì’atentecl Nov. 12,1946
UNITED STATES PATENT or-EicE
DIL WELL .PUMP PACKING
Harry
Johns, vKansas City, Mo., assignor to
Velma V. Johns
Application September 23, 1943, Serial No. 503,518
1 -Claim. (C1. 286-31)
1
This invention relates to rpumps of the charac
ter used for deep well pumping, and more par
ticularly, to improved packing means for pumps
of this type.
In deep well pumps the packing, for sealing the
circumferential surface of the working vbarrel in
its ‘reciprocating travel within lthe pump often
Wears rapidly due to sand and like abrasive sus
pended in the liquid ’being pumped. VThis neces
in cylinder 20 ynear its lower end, and a second
nipple 2-6 is interposed `in said cylinder nearer ¿the
upper end thereof.
Mounted for reciprocation within bore 24 of
nipple 22 is a tubular working barrel 28 carrying
a traveling valve 29 l-on its Vlower end, the latter
comprising a seat 36, a ball 32, normally resting
on the seat, and a perforated retainer ring '3'4
Since the pump Vis usually located at, or near ‘the
bottom of the well the resultant cost of removing
the entire pump assembly, including the `pump
to the seat.
secured in any suitable manner within barrel 28
sitates frequent replacement of the packing. 10 for limiting upward movementfof the ball relative
tubing and `sucker rod string, is relatively ïhigh.
To this cost must be added the loss >in time and
-production during the period while the pump is
`
As will be clear from Fig. ‘2, the upper end of
nipple 22 is concaved to form a seat for the yadja
cent end of a lower packing `sleeve 36 of suffi
cient thickness to iill the space vbetween barrel
28 and inner cylinder 2i). A similar upper pack
ing sleeve 38 is positioned adjacent a'bearing col
lar 46, against which rides an adjusting sleeve 42
'It is the primary object of this invention, there
surrounding the working 'barrel 28. An expan
fore, to provide a pump embodying `means to au
tomatically compensate ‘for the wear on packing "20 sion spring 44 interposed between packing sleeves
v33 and 33, serves to compress the same ‘to snug
incident to operation ofthe pump.
inoperative.
`
'
A lfurther aim of the invention 'is .to 'provide va
pump with packing on which a spring pressure
rfrictional Yengagement ' with "barrel 2 8.
been accomplished with structure illustrated in
the accompanying drawing, wherein:
the bore `56 o'f’upper head l2, `the latter being also
provided with a plurality of longitudinal vducts 5B
foi` passage of liquid from cylinder 20 into tubing
The’upper end of working barrel '128 is joined
'by
a nipple '45 with the »lower end of a perforated
is constantly maintained, and to embody mechM
anism within the pump whereby the springs for 25 cage 48 of a check valve 49, wherein is `mounted
a ball 50 vnormally resting yon a seating ring ‘52
applying -the pressure may 'be reloaded atfwi’ll
lwithin
the cage. yA pilot rod 54, threaded »into the
from the surface of the well.
upper end of cage At8, is rec-iprocably mounted in
These and other objects =of the invention Ahave
Fig. 1 is a central, longitudinal, condensed sec
tion of the upper portion of a pump constructed
in accordance with this invention.
Fig. 2 is a similar condensed, sectional view of
35
the lower end of the pump.
Fig. 3 is a cross section of the pump taken on
the line III--III of Fig. l.
Fig. 4 is a cross section on the line IV-IV of
60 connected by a coupling -62 to a reduced upper
end of head I2. A string of sucker rods 64,
threaded into a socket 66 of rod 54 leads to the
surface of the well and is connected to a pump
jack or the like, in the usual manner.
Formed on lower head Ill at its uppermost end, .
is a reduced, externally threaded neck 65 for
mounting the cage 66 of a standing valve 61
Fig. 5 is a cross section taken on line V-V of 40 wherein is contained a ring seat 68 and a ball
10, normally resting on the seat. A short nipple
Fig. 1.
l2 »is threaded into the upper end of the cage
The pump comprising the instant invention is
66 to retain the ball within the cage.
a long, slender, cylindrical unit without external
Within |the lower end of inner cylinder 20 and
protuberances to move freely through the casing
of a well. and includes 'a lower head Il) and an up 45 extending from lower head I0 into a threaded
recess 69 of nipple 22, is a liner 'II spaced con
per head I2, which are joined by an outer cylin
centrically from the inner cylinder and from
der I4. Lower head lil is provided with a reduced,
Working
barrel 28 to form a chamber 13 for liquid
externally threaded neck Iâ engaging the upper
entering the pump through an axial longitudinal
end of a strainer I8, or the like, extending into the
Fig. l; and»
v
body of liquid to be pumped.
An inner cylinder 20, concentric with outer
cylinder I4 and spaced slightly therefrom, is se
cured at its lower and upper ends to reduced por
bore 'I4 of head I0.
Y
Referring again to lower and upper packing
sleeves 36 and 38 respectively, these `sleeves should
be formed of compressible material in order that
reduction in cross sectional area of each sleeve
tions of heads I0 and I2 respectively. A nipple
22 having a relatively small bore 24 is interposed 55 incident to wear created by reciprocation of the
2,410,976
3
4
working barrel therein, may be compensated for
Obviously, it would be impractical to employ
After the packing sleeves have become Worn
and consequently shortened to the extent that
spring 44 is no longer capable of exerting sufñ
cient pressure thereagainst, the weight of the
isucker rod string is used to force adjusting sleeve
42 downwardly until the proper spring tension
is again obtained, pawls 8U serving to retain the
a spring sufficiently long to maintain a substan
ltially uniform pressure on sleeves of _such length
sleeve in adjusted position.
A pump has, therefore„been provided having
by reduction in the length of the sleeves through
action of spring 44. In actual practice it has
been found that sleeves 36 and 38 should be rela
tively long, as for example, eighteen inches or
more.
throughout the period of their usefulness. For
this reason, it is desirable to provide for periodi
substantially automaticl means for maintaining
its working barrel in properly packed condition.
cally reloading spring 44 without necessitating
Moreover, it has been made possible to reload the
spring, used for maintaining the packing in per
A preferred structure for accomplishing the
fect contact with the working barrel, from the
above result includes the adjusting sleeve 42 sur 15 surface of the ground, thus eliminating much
rounding the upper end portion of working bar
work, loss of time, and expense.
removal of the pump assembly from the well.
rel 28. This sleeve is provided with a series of
While only one embodiment of the pump has
annular ratchet teeth 'I6 having upwardly facing
been illustrated and described, it is conceivable
lateral shoulders 18 for engagement by a plu
that modincations might be made thereof without
rality of pawls 80 located in slots 82 of nipple 26 20 departing from the spirit of this invention, and
and pivotally mounted therein on pins 84. A
it is desired therefore, .to be limited only by the
circumscrìbing spring 86, clearly shown in Fig. 4
scope of the appended claim.
of the drawing, is mounted in an annular groove
Having thus described the invention, what I
88 of nipple 26 and contacts the plurality of pawls
claim as new and desire to secure by Letters
80 to urge the same into engagement with the 25 Patent is:
ratchet teeth 16. The upper end of sleeve 42
Packing structure comprising a fixed tubular
is adapted to bear against a lateral flange 9D
cylinder; a barrel reciprocably disposed within
on nipple 46.
the cylinder; spaced apart packing sleeves be
Any suitable means may be employed for creat
tween the cylinder and said barrel; a spring be
ing a sealed relation of the ends of outer cylinder 30 tween said sleeves for urging the same against
I4 with lower and upper heads I0 and I2 respec
the inner face of the cylinder and the outer face
tively, as indicated, for example, at 92.
of the barrel; an adjusting sleeve surrounding a
The operation of a pump constructed as de
portion of the length of the barrel, said adjust
scribed is as follows: ‘
Upward movement of working barrel 28 -creates 35
a vacuum in chamber 13 and liquid enters the
ing sleeve having a series of annular ratchet
teeth on the outer face thereof; a lateral projec
tion on the barrel for engaging one end of the
sleeve to urge the latter in a direction toward
said spring to compress the latter; and a series
chamber through strainer I8, bore 14, and stand
ing valve 61. As the working barrel returns
downwardly the standing valve is closed and ball
of pawls pivotally attached to the cylinder for
32 of traveling valve 29 is lifted from its seat 40 radial movement for engaging the said teeth to
`to allow iiow of liquid through working barrel 28,
lock the adjusting sleeve against movement in
check valve 49, `and ducts 58 into tubing 60.
a direction from said spring when the pawls are
Spring 44, initially loaded to exert a pressure of
engaged with any of the teeth, said pawls being
approximately two hundred pounds per square
so attached to the cylinder as to have their lower
inch against packing sleeves 36 and 38 prevents
ends free to swing radially toward and from the
return leakage of liquid around the outer face
teeth on said adjusting sleeve, said pawls having
of working barrel 28. As the packing wears,
a split annular spring circumscribing vthe series
spring 44 expands to maintain Ya perfect contact
thereof for drawing the same against the teeth
of the packing with the outer circumference of
of the adjusting sleeve.
the working barrel.
‘
50
»
HARRY F. JOHNS.
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