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Патент USA US2409104

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Oct- 3, 1946-
Filed Feb. 26, 1945
3 Sheets-Sheet l
55 ?
011?; 3, 3945,
J. D. cAvANEss
?Filed Feb. 26, 1945
:s Sheets-Sheet s
Patented Oct. 8, 1946
James D. Cavaness, Arlington, Tex.
Application February 26, 1945, Serial No. 579,877
5 Claims.
(01. 255?14)
This invention relates to well pumping appa
ratus and more particularly to an improved tight
ener for sucker rods.
An object of this invention is to provide an?
automatically operable means mounted on and
around the polished rod for automatically rotat
ing sucker rods clockwise in one cycle of move
ment of the rods.
Another object of this invention is to provide a
device of this kind which is active on the upward .
stroke of the polished rod for progressively rotat
ing the rods.
A further object of this invention is to provide
a device of this kind which is simple in its con-
struction and positive in its action within certain
adjusted load ranges for progressively rotating the
sucker rods as the rods are lifted upward.
Further object of this invention is to provide
a device of this kind which includes a housing
lowering the housing H to effect vertical recip
rocation of the polish rod H). The housing H
includes opposite side walls l1 and I8 and a top
wall Hi. The lower end of the housing I l is open
and is formed with a downwardly tapered or
flared ?ange l9?, having a cylindrical ?ange 29
formed integral therewith, so as to provide a rel
atively large diameter circular chamber 2! in the
lower end of the housing. The top wall i9 of the
housing ii is formed with an opening 22 within
which a plate 23 is loosely mounted. The plate
23 has formed integral therewith a bushing M
which extends partly within the housing II and
partly above the top wall IE, and is formed with
an opening 25 through which the rod Hl loosely
The upper end of the bushing 24 is
formed with a ball race 26 on which anti-friction
balls El- engage. A second anti-friction element
28 is disposed about the rod iii, being formed
secured about the rod and provided with pawl 20 with a ball race 29 and a ball retaining ring 33
is interposed between the two races '28 and 29.
and ratchet means active under the weight of
A split clamp 3| is secured by fastening mem
the lifting of the sucker rods to progressively
bers 32 to the rod it above the anti-friction
rotate the same in one direction.
member 28 and is adapted to hold the rod IQ
To the foregoing objects, and others which
may hereinafter more fullyappear, the invention 25 against lengthwise movement with respect to the
anti-friction bearing formed by the bushing 24,
consists of the novel construction, combination
the collar 23 and the balls 27.
and arrangement of parts, as will be more speci?
In order to provide a means whereby the rod
cally referred to and illustrated in the accom
Ill will be rotated as the rod is elevated or raised,
panying drawings, but it is to be understood that
I have provided at opposite ends of plate 23 a pair
changes, variations, and modi?cations may be
of ledges 33, having inclined lower surfaces 34
resorted to which fall within the scope of the
on which plates 35 are secured by fastening de
vices 35. A horizontal ledge-3?! is carried by each
In the drawings:
end wall of the housing I I, being formed with a
Figure 1 is a detail side elevation partly broken
away and in section of a polished rod tightening 35 horizontal upper surface 38 on which a bearing
plate 35} is secured by fastening devices 49. A
and rotating device constructed according to an
wedge 閘 is interposed between the two plates
embodiment of this invention.
35 and 39 and anti-friction rollers 42 are inter
Figure 2 is a vertical sectional view taken sub
posed between the upper inclined side of wedge
stantially on the line 2-2 of Figure 1.
Figure 3 is a sectional view taken on the line 40 Ill and plate 35. Anti-friction rollers 43 are inter
posed between the lower horizontal side 44 of
3-?3 of Figure 1.
wedge ill and lower horizontal plate 39.
Figure 4 is a fragmentary sectional view taken
A rock lever � is rockably carried by a pivot
on the line 4?4 of Figure 1.
46 and the upper end 4? of rock lever 55 is dis
Figure 5 is a sectional view taken on the line
45 posed in a position for engagement with the large
5-5 of Figure 2.
end of wedge Ill, so that when the wedge moves
Referring to the drawings, the numeral ID des
to the left, as viewed in Figure 4, rock lever 45 will
ignates an elongated polished rod of conventional
have the lower end thereof shifted to the right.
construction which is in turn attached to sucker
A pivoted pawl or dog 138 is rockably mounted on
rods extended into a well. A housing generally
designated as H is disposed about the rod I3 and 50 a pivot 49 engaging through the lower end of rock
lever 45 and includes a weighted free end 50. A
includes a pair of oppositely extendingtrunnions
serrated disc or plate 5! is disposed within the
12 which are carried by the opposite end walls [3
annular ?ange 2%], the teeth 52 of disc 5| being
and M. The looped lower ends N3 of a clevis 16
adapted to be engaged by pawl t8; Disc 51 in
are adapted to engage the trunnions I2, and are
invention as claimed.
connected to the walking beam for raising and 55 cludes a split bushing 53, which is clamped by
means of fastening members 513 to polish rod I8.
Disc 5! is held against reverse rotation by a re
movement with respect to housing II by means
of a plate 69 secured by fastening members 18
to ledge 3'! and an adjacent end wall.
The upper end 4-?! of lever 45 is limited in its
outward movement by means of an adjusting
bolt 'H threaded through housing H, so that the
rocking movement of lever 45 can be regulated to
the desired degree.
silient holding dog 55 secured by fastening mem
bers 58 to the lower side of ?ange l9. Holding
dog 55 is adapted to engage teeth 52 of plate 5!,
so that disc or plate 5| will be progressively ro
tated for rotating rod it under the action of the
rocking of lever 155, In order to provide for the
movement of wedge fill inwardly with respect to
plates 35 and 3S and the idling movement of pawl
I have provided a resilient lever operator 5?,
which is mounted in a housing 53 carried by an
What is claimed is:
1. A sucker rod tightener comprising a hous
ing engaging about polish rod, oppositely extend
ing trunnions carried by said housing, means
engaging said trunnions supporting said hous
obtusely disposed arm 59. A cap 851 telescopes
over the housing 58 and? confronts the adjacent
ing for vertical reciprocating movement, and
side of lever 55. Arm 58 is secured to an interf 15 means in said housing for effecting rotation of
nally threaded bushing 6!, which is threaded
onto an elongated 'tensioning bolt 62, extending
said rod in one direction upon upward move
downwardly through an opening 53 formed in the
top wall 19. Bolt 62 has a collar 5% secured there
about within the housing H, so that bolt 62 will
be held by cooperation of collar 54 and head 55
against endwise movement, but will be permitted
free rotary movement. The vertical position of
the resilient member 5?: will provide the desired
ment of said housing, said latter means includ
ing a pair of oppositely disposed wedge members
slidably mounted in said housing, a plate, mov
able endwise with respect to said housing and
rotatable about said rod, said plate formed with
inclined surfaces engageable with said wedge
members for sliding said Wedge ?members upon
vertical movement of said housing, a pair of rock
tension on the lower arm of lever �for auto
levers engageable at one end thereof with said
matically returning wedge 45 to its innermost
wedge members, whereby movement of said wedge
A vertically disposed ?ange 66 extends inwardly
members will rock said levers, a pair of oppo
from an adjacent end wall of the housing and
provides an abutment for housing 58, so that this
of said levers, and a toothed plate loose in said
housing will be held against inward movement
under pressure of lever 45.
In the use and operation or" this device, housing
II is disposed about rod iii, with disc 5i secured
by? fastening members 5/3 to rod Id. Clamp Si is
secured about rod ill by fastening members 32,
bearing against anti-friction member
5| is rotatably retained in ?ange all by means of
a split retaining ring 6?, engaging in an annular
recess 83, carried by ?ange 26. As rod H3 is raised
by upward movement of the walking beam or
other elevating means, the weight of rod IE] will
through bushing 24, which is movable through
opening 22 in top wall !9, cause lateral shifting ?
of wedges 4! to the left, as viewed in Figure 4.
Ledges 33, which are carried by bushing 24
and plate 23, will move inwardly with respect to
housing It) and in this manner eiiect rocking of
the upper end of lever G5 to the left and the
sitely disposed pawls carried by the opposite ends
housing and ?xed to said rod, said pawls engag
ing said plate to thereby effect the rotation of
said plate upon rocking of said levers in one di
2. A sucker rod as set forth in claim 1 in
cluding means for yieldably urging said levers for
rocking movement in the opposite direction,
3. A sucker rod as set forth in claim 1 in
cluding means for yieldably urging said levers for
rocking movement in the opposite direction,
wherein the tension or" said means urging said le
vers may be adjusted by a tensioning bolt, ac~
cessible exteriorly of said housing.
ll. A sucker rod as ?set forth in claim 1 includ
ing a resilient holding dog carried by said hous
ing and engaging with the teeth of said plate, for
holding the latter against reverse rotation.
5. A sucker rod tightener comprising a hous
ing engaging about a polish rod, means to ver
tically reciprocate said housing, means in said
lower end thereof to the right. As the lower end
housing for effecting rotation of said rod in one
of lever �rocks to the right, lever tensioning
direction upon upward movement of said hous
member 5? will be compressed and pawl 48 will
ing, said means including a pair of oppositely
rotate disc 51, which is secured to rod iii. As disc
disposed wedge members slidably mounted in said
55 rotates holding dog 55 will prevent reverse
housing, correlated means loosely carried by said
rotation of disc 5!, so that rod iii will be pro
housing and ?xed to said rod for effecting slid
gressively rotated in one direction during each
ing movement of said wedge members upon up
upward movement thereof.
ward movement of said housing, a pair of rock
It will be noted from Figure 2 of the drawings
levers engageable vat one end thereof with said
that plate 5| is loosely mounted in flange 2%,?so
wedge members whereby movement of said wedge
that this plate or disc may have sumcient verti
members will rock? said levers, and adjusting
cal movement within ?ange 2c to permit rela
means for limiting the rocking movement of said
tive movement of housing i I with respect to bear
levers, said latter means including a threaded
ing plate 23. This device will provide for the
bolt for each lever accessible exteriorly of said
automatic rotation or tightening of the polished
housing and interiorly engageable with the upper
rod, the degree of rotation with each vertical 65 ends of said rock levers, and means actuated by
movement of the polished rod being regulated by
rocking of said levers in one direction for? ei
the length of movement of wedge Iii. Wedge 4!,
fecting turning of said rod in one direction.
with rollers 42 and 43, are held against inward
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