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Патент USA US2090676

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Aug. 24, 1937.
Filed Sept. 3, 1935
2 Sheets-Sheet l
Fig. 2.
Aug- 24, 1937.
Filed Sept. 5, 1955
2 Sheéts-Sheet 2
Patented Aug. 24, 1.937
Horace M. Hallgarth, Galva, Kans.
Application September 3, 1935, Serial No. 38,865
1 Claim. (Cl. 121-159)
My invention relates to improvements in pump
hydraulically operated for each well substantial
The object of my invention is to provide a pump
jack having a long stroke, hydraulically oper
ated with automatic control for continuous pump
5 ing and adaptable to oil well service.
A further object of my invention is to pro
vide a simple and e?‘lcient means to disengage
any one or more of a group of pumps along the
power line in an oil ?eld without interruption
10 of pumps chosen to continue their function.
A still further object of my invention is to
provide means to return the ?uid such as oil
or gas to storage after being used to operate the
pumps, by which means excess waste of ?uid is
15 avoided.
These and other objects will hereinafter be
more fully explained reference being had to the
accompanying drawings forming a party of this
speci?cation and in which like characters will
20 apply to like parts in the different views.
Referring to the drawings:Fig. 1 is a front view of the pump jack mech
Fig. 2 is a plan View with counter balance re
25 moved.
capacity I have arranged a long stroke motor
Fig. 3 is a view of the yoke carrying element
for the polish rod as modi?ed.
Fig. 4 is an enlarged view *of the pump jack,
parts removed for convenience of illustration.
Fig. 5 is a fragmentary plan view of the trip
valve lever.
Fig. 6 is a fragmentary plan view of one end of
the lower valve link coupling.
Fig. '7 is an enlarged sectional View of the valve
35 at the base of the two cylinders, the ports in feed
Fig. 8 is an enlarged sectional view of the valve
controlling the trip of the valve shown in Fig.
7, the port in feed position.
My invention herein disclosed consists of a
pair of cylinders l--l spaced apart and seated
on a suitable foundation 2, centrally bored in
axial alignment to receive a casing 3 of an oil well
extending upward through the bore and having
45 on the upper end thereof a conventional type of
stu?ing box 4, through which the polish rod 5 will
work reciprocatingly with a smooth running ?t
as actuated by the said cylinders.
Extending through the oil ?eld is a high pres
sure pipe line from which laterals may extend
to the various oil wells in the ?eld, at which
points are positioned pump jacks to force the
oil into the pipe lines, conveying the same to
55 market or storage and to increase the pumping
1y as shown in Figs. 1 and 2.
Extending from the laterals or main pipe line
as the case may require, is a pipe 6 extending
upward and toward the cylinders, connecting to
the base of each by pipes l and 8 as conductors
for compressed ?uid into said cylinders.
Positioned in each cylinder is a piston 9 hav
ing a rod 10 centrally connected and extending
upward and outward through the upper head of 10
the cylinder; theupper ends of the rods are con
nected by a yoke H and to which the said polish
rod is attach-ed and subject to being raised when
the pistons are exercised by forcing ?uid in at
the base of each cylinder simultaneously through
the action of valves later described, the said
valves also control the exhaust of the ?uid for
the return stroke of the polish rod that is grav
ity actuated and each stroke automatically con
trolled as follows:
In Fig. ’7 is shown the valve control for cylin
ders l—l, the port position is for the exhaust of
said cylinders and by turning the port core 90
degrees ‘in the direction of the arrow, the ex
haust ‘will close, turning in the supply for said
cylinders to raise the polish rod.
In Fig. 8 is shown the trip valve control, the
port position as shown is to energize the trip
mechanism which in turn will actuate the said
cylinder valve as above described. When the core
as shown in Fig. 8 is turned 90 degrees in the
direction of the arrow the supply will cut off to
allow exhaust of the trip compression tube.
Positioned in working relation to- the valves
and cylinders is a valve trip consisting of a tubu 35
lar element l2 having a head to close each end
thereof, the upper head has a pipe l3 connected
thereto and a valve M positioned therein, the
lower head is bored axially with the tube so that
rod [4’ will‘slidably engage therein, the said 40
rod has secured to its upper end a piston I5
adapted to engage in the said tube with a smooth,
running ?t reciprocatingly.
The lower end of the said rod is connected to
a valve lever l6 through the medium of a link 45
ll, each end of which is hingedly joined as
at A and B to their respective lever and rod, by
which means the core of valve I8 is turned to
and fro for reciprocating movement of the pis
tons of cylinders l-l.
The injecting position of the valve core as
shown by dotted line C in valve I 8 is accom
plished by ?uid compression in tube l2 for down
ward stroke of piston 15, the action of which is
controlled by valve l4, having a lever I9 as turn
cured to the other end of the said beam is a
ing means therefor and being actuated by rod 20
pendently carried by an arm 2| secured to the
yoke and carried reciprocatingly therewith, and
is adapted to slidably engage in slot 22 of lever
l9, moving the latter downward as stop 23 con
tacts therewith opening the said valve simul
cable 34 as pendant carrying means for weights
35 to partially balance the weight of the said
taneously with the maximum downward stroke
of pistons 9.
The opening of said valve is means to in?ate
tubular element l2 as opening means for valve
“5 to inject ?uid into each of the cylinders l-—|
through their respective pipe connections previ
ously described, and the piston in each cylinder is
caused to make its upward stroke and during such
stroke the said valve trip is retained to engage
ment by the flow or pressure through pipe 24,
all of which is accomplished by the valve port’s
position as shown by dotted lines in Fig. 4.
As the pistons carrying the polish rod there
with approach their maximum upward stroke, stop
25 on rod 20 will raise valve lever l9 turning its
core port to an exhaust position and closing feed
pipe 24, simultaneously connecting exhaust pipes
25 l3 and 26, at which instant piston I5 is released
and raised by a coil spring 21 discharging the
contents of the said tube through pipes 26 and
28 as the main drain.
The upward movement of the said piston l5
will turn the ports in valve [8 to exhaust through
pipe 6' into pipe 28, this exhaust being the drain
for cylinders l-| that is gravity actuated by
the polish rod, should the latter described ex
haust force be too great, tending to back up in
'- pipe 26, the result of which would be to prema
turely actuate the said valve trip, and to over
come such action I have placed a check valve 29
in pipe 26 as an emergency for such condition,
which at all times will resist excess pressure
40 from cylinders l-—I in their tendency to create
pressure in pipe 26 or as above stated.
A counter balance is provided for the polish
rod through the medium of a beam 30 pivotally
mounted on a Sampson post 3|. The said beam is
45 equipped with an arcuated mule head 32 with
cable 33 attached and connected to the yoke; se
polish rod.
In Fig. 3 is shown a modified form for the yoke,
transmitting the load of the polish rod to each
end thereof, by which means an unequal lift
ing power of the cylinders will be partially coun
ter balanced, as the load center will move from
the weaker cylinder by the rocking movement 10
of the downward extension D, and such other
modi?cations may be employed as lie within
the scope of the appended claim.
Having fully described my invention, what I
claim as new and desire to secure by Letters Pa
tent is:
In a motor‘ of the class described, a pair of
cylinders vertically positioned in close prox
imity to each other, each of said cylinders hav
ing a piston and a rod, the rods having means
to connect the outer ends thereof and the said
means to carry an oil well polish rod recipro
catingly with the pistons as an oil well pump, an
oil supply pipe connected to the lower end of
each cylinder, a supply and exhaust valve in the [0 01
said pipe, said Valve having an exhaust pipe con
nected thereto and the valve core having a
lever to turn the same, a tubular oil container
as a valve trip and a pipe as supply and ex
haust therefor, another similar valve in the last 30
said pipe and a slotted lever to turn the core
of the valve, a rod carried by the said piston
rods of the cylinders, the said rod to slidably
engage in the slot of last said lever as means to
alternately turn the core of last said valve oppo 35
sitely to by-pass ?uid alternately to the said trip
element, and an exhaust pipe therefor by which
means, the lever of the ?rst said valve is ac
tuated downward to exhaust ?uid contained in
said cylinders, and the said trip element having 40
a spring to oppositely turn the core of the valve
to by-pass ?uid under pressure into said cyl
inders, all substantially as shown and for the
purpose speci?ed.
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