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Патент USA US2063802

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Dec. 8, T936.
w. s. GEARY
2,063,802
AUTOMATIC R_OD LINE ADJUSTER
Filed May 22, 1936
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8, 1936.
‘ w, s_ GEARY
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2,063,802
AUTOMATIC _ROD LINE ADJUSTER
Filed May 22, 1956
2 Sheets-Sheet 2
S.
INVENTOR.
Will-i. am Er _ E E ail-‘H
MI
I
ATTORNEY .
Patented Dec. 8, 1936
‘
UNITED STATES
2,063,802
PATENT OFFICE
2,063,802
AUTOMATIC ROD LINE ADJUSTER
William S. Geary, Dallas, Tex.
Application May 22, 1936, Serial No. 81,318
11 Claims. (Cl. 74—586)
‘This invention relates to improvements in
automatic rod line adjusters.
In oil well pumping systems wherein a single
power plant is utilized to operate a plurality of
distant wells by means of reciprocating rod lines,
improper operation of the pump and damage to
the pumping equipment is liable to occur when
a change in temperature causes longitudinal ex
pansion or contraction in the rod lines. For in
stance, if the various rod lines are adjusted to
their correct operating lengths, and the opera
tion of the power plant is discontinued in the‘
afternoon while the temperature is relatively
high, the lines ‘will become too short when the
temperature decreases, as during the night, and
as a result the pumping jacks will sometimes be
‘broken or pulled away from their foundations.
It is, therefore, an important object of the
present invention to provide an improved rod
26 line adjuster which will automatically compen
sate for longitudinal expansion or contraction of
a reciprocating rod line while the line is in use.
Another object of the invention is to pro
vide a rod line adjusting mechanism which will
25 automatically compensate for longitudinal con
traction in a rod line while the line is idle.
A further object is to provide an improved
?uid-regulated reciprocating rod line adjuster
including a ?uid pump actuated by the recipro
cating movement of the line.
Other objects and advantages of the invention
will appear in the following detailed description,
taken in connection with the accompanying
drawings, forming a part of this speci?cation,
and in which drawings:—~
Figure l is a view in side elevation of the im
proved automatic rod line adjuster associated
with a portion of the rod line.
Figure 2 is a View partly ‘in end elevation and
:40 partly in cross section taken on the line 2—2 of
Figure 1.
Figure 3 is a vertical sectional View of a ?uid
pump preferably associated with the rod line
adjuster.
Figure 4 is a horizontal sectional view of a
?uid control valve preferably associated with
the rod line adjuster.
Figure 5 is an enlarged vertical sectional view
of a cylinder sealing cap preferably forming a
:50 part of the rod line adjuster.
In the drawings, where for the purpose of illus
tration is shown only a preferred embodiment of
the invention and wherein similar reference char
acters denote corresponding parts throughout
the several views, the letter A may generally
designate the improved automatic rod line ad
juster, comprising a pair of swinging posts B, a
cylinder C pivotally supported on the posts, a
piston D longitudinaly slidable in the cylinder,
a ?uid reservoir E, a ?uid pump F associated
with the reservoir, pump actuating means G, a
control valve H, control valve regulating means
I, a relief valve J and relief valve regulating
means K.
Referring ?rst to the swinging posts B, they are
preferably square in cross section and may each
be made by welding together two pieces 10 and.
II of chanel iron. One end of each post may be
pivotally secured to a suitable foundation 12 as
10
by bearings I3.
Pivotally secured to the opposite end of each
post as by bearings I4 is an elongate cylinder C.
This cylinder may comprise an outer tube l5
which may be made from steel casing material
of a length depending upon the length of the rod 15
line with which it is to be associated and an inner
concentric tubular brass liner l6. An internally
threaded cast steel cap I‘! provided with an eye
I8 may be screwed to one end IQ of the cylinder
whereby that end is adapted to be connected to 20
a pumping jack (not shown) or other load by
means of a short length of rod line 20. The other
end 2| of the cylinder may be sealed by an inter
nallythreaded cast steel cap 22 shown in Figure
5. A diametrical passageway in the cap 22 forms 25
an inlet 23 and an outlet 24 to the cylinder and.
more particularly to the interior of the liner I6.
An axial shaft-receiving passageway 25 having
associated therewith a' suitable packing gland
26 may also be provided in the cap 22. Secured 30
to one side of the cylinder in circumferentially
contacting relation is a channel bar 21 providing
a vertical fastening surface 28. Co-acting with
the lower portion of the channel bar 21 to form
aligning horizontal fastening surfaces 29 beneath 35
the cylinder is an angle bar 30 secured in circum
ferentially contacting relation to the lower half
of the opposite side of the cylinder. The swing
ing post bearings 14 preferably are positioned sub
jacent the surfaces 23 and secured to the bars 40
21 and 30 as by bolts 3|.
Referring now to the piston D, it is arranged
to longitudinally slide in the cylinder, and more‘
particularly in the liner I6 thereof and preferably
forms a ?uid tight joint with the liner. The pis .45
ton may include a cylindrical head 32 provided
with a shaft 33 adapted to extend through the
axial passageway 25 of the cylinder end cap 22.
At its exteriorly projecting end the shaft may be
provided with an eye 34 whereby the piston is 50
adapted to be connected to a rod line 35 extend
ing to the power plant (not shown).
As to the ?uid reservoir E, a cylindrical barrel
36 supported in an upright position on a suitable
foundation 3'! may be employed. Fluid pump F 55
may be secured to the channel bar 21 adjacent
the surface 28 thereof as by clamps 38. As shown
in Figure 3, the pump may comprise a central
body portion 39, a base40 having an inlet, an
air chamber 4| having an outlet, a pair of valves 60
2,063,802
42, one clamped between the portion 39 and the
base 40, and the other between the portion 39
and the chamber iii, a barrel 43 communicating
with the central body portion between the valves
42, and a reciprocable plunger rod 44 having one
end 45 positioned in the barrel and carrying a
pair or“ cups 46, the other end 41 of the plunger
end 8| of the rod in spaced relation one above and
one below the bracket.' The spring 68 in the con
trol valve preferably is of a strength to counter
balance the shifting effect exerted upon the piston
rod 63 by the weight of the lever arm 71, rod 19
and nuts 82 and 83 whereby the valve will remain
in either a closed or an open position.
.
rod extending from the barrel and terminating’ ,, Relief valve J may be provided for the cylinder
outlet 24 and as shown in Figure 5 it may com
in a threaded portion 138. The pump inlet may
prise a tubular valve body 84 having one end 85 10
be connected to the ?uid reservoir as by a ?exible
pipe 49 while the pump outlet may be connected
to the cylinder inlet 23 as by a passageway 50
secured in the cylinder outlet, the opposite end
86 being provided with a suitable giand 81. The
preferably provided with a one-way or check valve valve proper may include a valve head 88 adapted
5! adapted to prevent a return ?ow along the pas- ' to seat against the end 85 of the valve body 84, a
sageway 5?-from the cylinder.
In order to continuously actuate the pump F
by utilizing the reciprocating movement of the
rod line, the following pump actuating means G
may be employed. A bell crank lever 52 having
valve stem' 89 extending through and projecting 15
from the gland 8'8, and a spring 90 urging the
valve stem outwardly whereby to releasably hold
one arm 53 pivotally and adjustably secured to
the ?uid reservoir E by means of a flexible pipe 92. 20
the threaded end of , the plunger rod 44 as
Referring to the relief valve regulating means
K, it may include a lever 93 of the ?rst class
pivotally secured to a bracket 94 secured to the
channel bar 21. One end 95 of the lever may be
positioned beneath the relief valve stem and the 25
other end 96 may be pivotally secured to the up
per end 91 of a rod 98. The threaded lower end
by nuts 54 threaded thereon may be pivoted to
a suitable bracket 55 attached to the channel
bar 2? associated with the cylinder. The other
25 arm 55 of the lever 52 may be connected by a piv
oted link 5'! to the outer end of a bracket 58 at
tached to and projecting laterally of one of the
the valve in a closed position. A lateral outlet
opening 9| in the valve body may be connected to
swinging posts B.
99 of this rod 98 is adapted to loosely extend
A control valve H may be provided for regulat
ing the ?ow of ?uid from the pump 15‘ to the
cylinder C. As shown in Figure 4, the control
valve may comprise a cylindrical main body por
through an opening in the end I00 of a bracket
tion 59 having a cylindrical axial bore 6!) com
municating with a pair of spaced apart annular
35 chambers forming an inlet port BI and an outlet
port 62. A piston rod (33 having a pair of spaced
apart piston heads 64 and 85 adapted to slidingly
contact the axial bore 65 is provided. I When the
piston rod is positioned as shown in Figure 4, the
40 inlet and outlet ports 6! and 62 are positioned
between the piston heads 64 and 65 thereby per
mitting a ?uid ?ow through the valve. The pis~
ton rod may be shifted so that the piston head
64 is positioned between the inlet and outlet ports
llll rigidly secured to, and laterally projecting 30
from one of the swinging posts B. A nut I02 may
be adjustaby secured to the threaded lower end
99 of the rod 98 in spaced relation below the
bracket IOI.
In operation, the improved automatic rod line 85
adjuster may be positioned near the well, with the
rod line 35 from the pumping power attached to
the piston rod, a connection from the pumping
jack such as the relatively short length of rod
line 20 being attached to the cylinder, the swing 40
ing posts being substantially vertical and the re
maining parts being positioned as shown in Figure
1 when the well pump is halfway through its
stroke, it being understood that the reservoir E
and the cylinder C have been supplied with a 45
quantity of ?uid. When the pumping power re
tion 59 are of course sealed as by removable disc- 7 lieves the tension on the 'rod line, the cylinder
will be pulled toward the well through the action
like plates 66 and 61. A spring 68 may be inter
posed between the plate 65 and one end 69 of the of the pumping jack thereby tilting the swinging
posts B toward the well. The bracket 58 will 50
piston rod. The other end 10 of the rod may ex
thereupon swing downwardly, exerting a pull on
tend through and outwardly project from a suit
ably packed central opening in the plate 61 and rod 51 which through the bell crank lever 52 will
may be provided with a pair of oppositely disposed cause the fluid pump plunger 44 to draw a
notchesll. The control valve I-I may be secured quantity of ?uid through the ?exible pipe 49
from the ?uid reservoir and thence through the 55
55 to the channel bar 2‘! as by a suitable bracket 12.
Communication between the ?uid pump and the lower valve 42 into the pump F. When the pump~
control valve inlet port 6| may be provided as by ing power exerts a pull upon the rod line the cylin
der will be pulled toward the power and the
a pipe 13 extending from that portion of the pas
sageway 50 between the pump and the check valve swinging posts will tilt in the opposite direction
thereby exerting an upward push through bracket 60
60 5| to the inlet port. Communication between the
45 6i and 62 thereby preventing a ?uid ?ow through
the valve. The ends of the cylindrical body por
control valve outlet port 62 and the fluid reservoir
may be provided by means of a ?exible pipe 14.
Referring now to the control valve regulating
means I, it may comprise a bell crank lever 15
65 pivotally secured to the control valve bracket 12.
One arm 15 of the lever 15 is preferably forked
whereby a pivotal connection is obtained with the
piston rod 53 at the notches ‘H therein. The
other arm ll of the bell crank lever is associ
70 ated with a laterally projecting bracket 18 secured
to one of the swinging posts B by means of a rod
79 pivoted at its upper end 80 to the arm 11. The
threaded lower end 8i of the rod 19 may loosely
extend through an aperture in the bracket 18.
75 Nuts 82 and 83 may be adjustably secured on the
58 and rod 5'! which through the bell crank lever
52 will cause the pump plunger to force the ?uid
through the upper valve 42 of the pump F into the
passageway 50. Control valve H being in an open
position, the ?uid will pass through the pipe 13 65
and will return to the reservoir through the
flexible pipe 14. the direction of ?ow being shown
by the full line arrows in Figure 1. Normally the
control valve regulating means I and the relief
valve regulating means K will not be a?ected by 70
the swinging of the posts B.
When an increase in temperature causes elon
gation of the rod line 35, the swinging posts 13
will tilt a greater degree toward the well resulting
in contact of the bracket 18 and nut;82 of the 75
2,068,802
control valve regulating means I whereby the rod
19 will be moved upwardly and will cause the bell
crank lever 15 to shift the control valve piston rod
63 to a closed position. The return of ?uid to the
reservoir E being prevented when the valve H is
closed, the ?uid will be forced by the pump F along
the passageway 50 and‘into the cylinder thereby
moving the piston 32 whereby to compensate for
the elongation of the rod line 35 whereupon the
10 swinging posts B will return to a normal position.
The bracket 18 will thereupon contact the nut 83
and will exert a downward pull on the rod 18
whereby to open the control valve H. Thereupon
the ?uid will cease ?owing to the cylinder be
15 cause of a lesser resistance to the flow of ?uid
through the control valve and back of the ?uid
3,
to cause introduction of ?uid into the cylinder
to move the piston in a direction to compensate
for the rod line length variation and upon move
ment of the piston relative to the cylinder a dis
tance substantially equal to the rod line length OX
variation to cause discontinuance of the intro
duction of ?uid into the cylinder.
3. Automatic length-adjusting mechanism for
a reciprocating motion transmitting line com
prising an elongate cylinder adapted to be con 10'
nected to a load, a longitudinally slidable pis
ton in the cylinder adapted to be connected to
the reciprocating line, a ?uid pump, means as
sociated with the reciprocating line for continu
ously actuating the pump, a ?uid passageway 15
from the pump to the cylinder, a valve associated
20 not the line is in use, the swinging posts B will
with the passageway and normally positioned to
divert ?uid therefrom, and control means for
the valve and operable upon variation in the
length of the reciprocating line to change the
abnormally tilt toward the power plant until the
bracket l?l associated with the relief valve regu
lating means K contacts the nut I02 whereby to
exert a downward pull upon the rod 98. The lever
93 will thereupon press the valve stem 89 and cause
the relief valve to open in spite of the resistance
of the spring 90. If the rod line is not in use, the
relief valve will be continuously held open, where
substantial compensation of the line length
variation.
4. Automatic length-adjusting mechanism for
reservoir.
7
When a decrease in temperature causes longi
tudinal contraction in the rod line 35, whether or
as if the line is in use and reciprocating, the valve
30 will open and close as the posts swing back and
forth. In either case, ?uid will escape from the
position of said valve in order to‘cause ?uid to
pass into the cylinder whereby to move the pis
ton in a direction to compensate for the line
length variation, said control means being adapt
ed to return the valve to its normal position upon 25
a reciprocating motion transmitting line com
cylinder and return to the ?uid reservoir through
the ?exible pipe 92, thereby permitting the piston
prising a swinging post, an elongate cylinder piv 30
otally secured to the post and adapted to be con
nected to a load, a longitudinally slidable piston
in the cylinder adapted to be connected ‘to the
to move in the cylinder in a direction toward the
35 power whereby to compensate for the contraction
ciated with the reciprocating line for continu 35
in the rod line. The bracket IOI will thereupon
move out of contact with the nut I02 and permit
the relief valve to close under the in?uence of the
spring 90 whereby further escape of ?uid from
the cylinder will be prevented.
Thus it will be seen that an improved ?uid
operated and controlled rod line adjuster has
been provided which will automatically com
pensate for elongation in a reciprocating rod
45 line and which will automatically compensate
for contraction of the line whether or not the
rod line is in use.
Various changes may be made in the form of
reciprocating line, a ?uid pump, means asso
ously actuating the pump, a ?uid passageway
from the pump to the cylinder, a valve associated
with the passageway and adapted to normally
divert ?uid therefrom, and control means for the
valve associated with the swinging post, said con 40
trol means being operable upon abnormal swing
ing movement of the post due to a variation in
the length of the reciprocating line to- change
the position of said valve in order to cause ?uid to
pass along said ?uid passageway into the cylin 45
der whereby to move the piston in a direction to
compensate for the line length variation, said
control means being adapted to return the valve
invention herein shown and described, without -to its normal position upon substantial compen
50 departing from the spirit of the invention or the
scope of the following claims.
I claim:
.
1. Automatic length-adjusting mechanism for
a rod line comprising an elongate cylinder adapt
ed tobe connected to a load, a longitudinally
slidable piston. in the cylinder adapted to be con
nected to the rod line, means automatically op
erable upon a length variation in the rod line
for introducing ?uid into the cylinder to move
the piston in a direction to compensate for the
rod line length variation, and means to cause
discontinuance of the introduction of ?uid into
the cylinder upon movement of the piston rela
tive to the cylinder a distance substantially equal
65 to the rod line length variation.
2. Automatic length-adjusting mechanism for
a ‘reciprocating rod line comprising an elongate
cylinder adapted to be connected to a load, a
longitudinally slidable piston in the cylinder
70 adapted to be connected to the reciprocating rod
line, a pump, means associated witl. the rod line
for actuating the pump, a fluid passageway be
tween the pump and the cylinder, ?uid control
means cooperating with the passageway and
75 adapted upon a length variation in the rod line
sation of the line length variation.
50
. 5. Automatic length-adjusting mechanism for
a reciprocating motion transmitting line com
prising a swinging post, an elogate cylinder piv
otally secured to the post and adapted to be con
nected to a load, a longitudinally slidable piston 55
in the cylinder adapted to be connected to the
reciprocating line, a ?uid pump including a re
ciprocable plunger, pump actuating means asso
ciated with the swinging post for transmitting
reciprocating movement from the line to the 60
pump plunger, a ?uid passageway from the pump
to the cylinder, a relief valve for the cylinder,
and control means for the relief valve associated
with the swinging post, said control means be
ing operable upon abnormal swinging movement 65
of the post to open the valve.
6. Automatic rod line length-adjusting mech
anism comprising an elongate cylinder adapted
to be connected to a load, a longitudinally slid
able piston in the cylinder adapted to be con 70
nected to the line, a normally closed relief valve
for the cylinder, and control means for the relief
valve operable upon variation in the length of
the line to open the valve.
'7. Automatic length-adjusting mechanism for 75
4
2,063,802
a reciprocating motion transmitting line com
otally secured to the post and adapted to be con
nected to a load, a longitudinally slidable pis
means, an‘ elongate cylinder pivotally secured to
the supporting means and adapted to be con
nected to a load, a longitudinally slidable piston
in the cylinder adapted to be connected to the
prising a swinging post, an elongate cylinder piv
ton in the cylinder adapted to be connected to
reciprocating line, a ?uid pump including a re
the reciprocating line, a normally closed relief
ciprocable plunger, pump actuating means as
valve for the cylinder, and control means for the
relief valve associated with the swinging post,
sociated with the swinging supporting means for
transmitting reciprocating movement to the pump
said control means being operable upon abnor
plunger, a ?uid passageway from the pump to
the cylinderra check valve in the ?uid passage 10
10 mal swinging movement of the post due to a va
riation in the length of the line to open the valve.
8. Automatic length-adjusting mechanism for
a reciprocating motion transmitting line com‘
prising an elongate cylinder adapted to be con
15 nected to a load, a longitudinally slidable piston
in the cylinder adapted to be connected to the
reciprocating line, a ?uid pump, means asso
way adapted to prevent a return ?ow from the
cylinder, a control valve associated with the pas
sageway and normally positioned to divert ?uid
therefrom, control valve operating means asso
ciated with the swinging supporting means for 15
changing the position of the control valve to
cause ?uid to pass through the passageway into
ciated with the reciprocating line for continu
the cylinder upon longitudinal expansion of the
ously actuating the pump, a ?uid passageway
from the pump to the cylinder, a control valve
associated with the passageway and normally
line whereby to move the piston in a’ direction
to compensate for said expansion, said control 20;
valve operating means being adapted to return
the control valve to its normal position upon
substantial compensation for said. expansion, a
normally closed relief valve for the cylinder, and
relief valve operating means associated with the 25
swinging supporting means for opening the re
lief valve to permit ?uid to escape from the cyl
inder upon longitudinal contraction of the line
whereby to enable movement of the piston in a
direction to compensate for said contraction, said 301
relief valve operating means being adapted to re
turn the relief valve to its normal position upon
substantial compensation for said contraction
positioned to divert ?uid therefrom, control valve,
operating means for changing the position of
the control valve to cause ?uid to ‘pass through
25. the passageway into the cylinder upon longi
tudinal expansion of the line whereby to move
the piston in a direction to compensate for said
longitudinal expansion, said control valve operat
ing means being adapted to return the control
valve to its normal position upon substantial
compensation for said expansion of the line, a
normally closed relief valve for the cylinder,
and relief valve operating means for opening the
relief valve to permit ?uid to escape from the
35 cylinder upon longitudinal contraction of the line
whereby to enable movement of the piston in a
direction to compensate for said longitudinal con
traction, said relief valve operating means be
ing adapted to return the relief valve to its nor
mal position upon substantial compensation for
the contraction of the line.
9. Automatic length-adjusting mechanism for
a reciprocating motion transmitting line com
prising an elongate cylinder adapted to be con
45 nected to a load, a longitudinally slidable piston
in the cylinder adapted to be connected to the
reciprocating line, a ?uid pump continuously ac
tuated by the reciprocating line, a ?uid passage
of the line.
‘
11. Length-adjusting mechanism for a recipro
cating rod line comprising swinging supporting
means, an elongate cylinder pivotally secured to
35:
the supporting means and adapted to be con
nected to a load, a longitudinally slidable piston
in the cylinder adapted to be connected to the 40
reciprocating line, a ?uid reservoir, a pump adapt
ed to pump ?uid from the reservoir and includ
ing a reciprocable plunger, pump actuating means
associated with the swinging supporting means
for transmitting reciprocating movement to the 45
pump plunger, a ?uid passageway from the pump
to the cylinder, a check valve in the ?uid passage
way adapted to prevent a return ?ow from the
way from the pump to the cylinder, a check valve _ cylinder, a control valve associated with the pas—
50 in said passageway adapted to prevent a return sageway and adapted to normally divert ?uid 50
flow from the cylinder, a control valve associated therefrom and return it to the reservoir, control
with the passageway and normally positioned to valve operating means associated with the swing
divert fluid therefrom, control valve operating
ing supporting means for changing the position
means for changing the position of the control
valve to cause ?uid to pass through the passage
way into the cylinder upon longitudinal expan
sion of the line whereby to move the piston in
a direction to compensate for said longitudinal
expansion, said control valve operating means
60 being adapted to return the control valve to its
of the control valve to cause ?uid to pass through
the passageway into the cylinder upon longi
tudinal expansion of the line whereby to move 55
the piston in a direction to compensate for said
expansion, said control valve operating means
for said expansion of the line, a normally closed
relief valve for the cylinder, and relief valve op
erating means for opening the relief valve to
65 permit ?uid to escape from the cylinder upon
longitudinal contraction of the line whereby to
enable movement of the piston in a direction
the cylinder to the reservoir, a normally closed
relief valve associated with the outlet passage
way, and relief valve operating means associated
with the swinging supporting means for open
normal position upon substantial compensation
to compensate for said longitudinal contraction,
said relief valve operating means being adapted
to return the relief valve to its normal position
upon substantial compensation for the contrac
tion of the line.
10. Length-adjusting mechanism for a recipro
cating rod line comprising swinging supporting
being adapted to return the control valve to its
normal position upon substantial compensation
for said expansion, an outlet passageway from 60
ing the relief valve to permit ?uid to escape from 65
the cylinder upon longitudinal contraction of
the line whereby to enable movement of the pis
ton in a direction to compensate for said con
traction, said relief valve operating means be
ing adapted to return the relief valve to its nor 70
mal position upon substantial compensation for
said contraction of the line.
WILLIAM S. GEARY.
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