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Патент USA US3100023

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Aug- 6, 1963
J. R. SOLUM ETAL
3,100,016
ROD CENTRALIZER
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Aug- 6, 1963
J. R. soLuM E'II'ALI
3,100,016
ROD CENTRALIZER
Filed 001;. 24, 1960
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INVENTORS
JAMES /-?. SOLUM
BY WILLI M C‘. HEMPEL
4%
A TTO/FNEYS
3,100,016
Patented Aug. 6, 1963
2
3,108,016
ROD CENTRALIZER
James R. Soium, Los Angeies, and William (I. Hempel,
Manhattan Beach, Calif., assignors to B & W Incor
porated, Torrance, (lali?, a corporation of (Ialifornia
Filed Get. 24, 1960, Ser. No. 64,496
14 Claims. (?. 166—24l)
tralizer generally designated 10, includes a pair of upper
and lower collars 11 and 12, respectively, axially aligned
and spaced, adapted to encircle and be mounted on a
well pipe or casing (not shown).
A spring rod assembly, generally designated 13, is pro
vided and includes a plurality of spring rod segments
13a which extend bet-ween and separate the upper and
lower collars, I1 ‘and 12. Each spring rod segment 13a
This invention relates to the drilling and completion
has outwardly bowed portions 14 adjacent each end and
of wells and is particularly directed to improvements in 10 relatively straight middle portion 15' (as best shown in
devices for centering the casing in the well bore and
FIG. 4). The middle portion ‘15 of each rod segment
improving the quality of cementing the casing in the well
is inclined to a plane intersecting that rod segment and
bore.
containing the axis of the collars 1d and 12 as a result
In the completion of oil and gas wells, it is common
of the angular misalignment of the ends of each rod
practice to cement the casing within the well bore. To
segment. The rod segments may be portions of a con
improve the quality of cementation, devices are placed
tinuous ‘length of spring rod (as shown) having base
on the exterior of the casing to center same within the
pieces 16 joining each adjacent rod segment.
well bore and additional devices, generally described as
On each collar a plurality of circumferentially spaced
scratchers, are similarly mounted to condition the well
tabs 17 are lanced outwardly from the surface of said
20 collars and having base portions '18. Internal recesses
bore wall and drilling ?uid.
The present invention is concerned with improvements
19 are formed adjacent each tab base portion 18‘ and said
in devices composed of outwardly bowed round steel
recesses are of su?icient depth and width to receive the
rods that perform both the centering and conditioning
end portions 20 of said tabs. Pilot holes 21 may be
functions and more particularly with improvements in
punched in the collar (as shown) for proper indexing
the mounting of these rods on collars to be installed on 25 and locating of the said collar in the ?nal assembly op
the exterior of the casing.
eration of manufacture.
Accordingly, it is the principal object of this inven
vIn assembling the device the base piece 16 of the rod
tion to provide a novel form ‘of well cementing tool for
length is inserted under the tab 17 near the base portion
centering casing in a well bore and conditioning the well
18 thereof and the end portion 20 is forced around the
bore wall and drilling ?uid prior to the cementation. 30 said base piece into the internal recess 19. Welding
Another object of this invention is to provide an effec—
may be used to retain said end portion 26 in said recess
tive centering device to be mounted on the exterior of
19 (not shown).
well casing which device o?ers a minimum restriction
In the modi?ed form of this invention shown in FIGS.
to circulation in the annular space between the casing
5 and 6, the tab 17a is forced outwardly of the collar
35 and around the base piece 16a of the rod length. Fur
and the well bore.
Another object of this invention is to provide a novel
ther, the tab end portion 20a is secured by any con
form of well cementing tool for conditioning the well
venient means such as spot weld 22a.
bore wall upon axial movement of the casing relative to
the well bore wall which includes rods inclined to such
In the second modi?ed form of this invention shown
in FIGS. 7 and 8, the tab 17b extends beyond one end
direction of movement‘, and which tool will not impart 40 of the collar 11b and said tab includes a recess 23b
a rotational force on the casing.
‘formed interiorly and an end portion 2% extending axial
ly. The rod base piece ‘16b is positioned within recess
23b and ring 24b is axially inserted inside the said tabs,
end
portions, recesses and rod base pieces and said ring
45
Other and more detailed objects and advantages will
is secured to said tabs by any convenient means such
Another object is to provide a well tool of this type
to be mounted on a well casing wherein the rods are
secured to coaxial separated collars in a novel manner.
appear hereinafter.
as spot weld 22b.
In the third modi?ed form of this invention shown in
FIG. 1 is a perspective view of the well tool device
FIGS. 9, 10 and 11 rod securing tab means used in the
constituting the preferred embodiment ‘of this invention. 50 previously described forms is replaced by an interior
FIG. 2 is a sectional view taken substantially on lines
pocket 25 having an axially facing opening 26 and a.
2—2 in FIG. 1.
bridge element 27 near said opening. The rod base
FIG 3 is a sectional view of substantially the same
pieces 160 of this modi?ed form have axially extending
portion as FIG. 2 but prior to ?nal assembly of the
portions for insertion under the bridge element 27,
device.
55 through the opening 26 and into the pocket 25. The
FIG. 4 is a pro?le view of one rod segment of the
said bridge element and pocket are then mechanically
vertically extending spring rod assembly shown in FIG. 1.
deformed to secure the rod base pieces to the collar 11c.
FIG. 5 is a fragmentary view similar to FIG. 1, show
Having fully ‘described our invention, it is to be under
ing a modi?cation.
stood that we do not wish to be limited to the details
FIG. 6 is a sectional view taken substantially on lines 60 herein set forth, but our invention is of the full scope of
6-6 in FIG. 5.
the appended claims.
We claim:
FIG. 7 is a fragmentary view similar to FIG. 1, show
ing a second modi?cation.
1. In a device ‘of the class described, adapted to be
mounted on the outer surface of a well pipe, the combina
FIG. 8 is a sectional view taken substantially on lines
8-8 in FIG. 7.
65 tion of: a pair ‘of axially aligned and spaced collars, a
plurality of generally axially extending ‘and outwardly
FIG. 9 is a fragmentary view similar to FIG. 1, show
ing a third modi?cation.
bowed rod segments, each said rod segment having angu
FIG. 10 is a sectional view taken substantially on
larly offset ends, each rod segment positioned at an angle to
lines 10-10 in FIG. 9‘.
each adjacent rod segment, and a plurality of circumferen
FIG. 11 is a sectional view taken substantially on 70 tially spaced means on each said collar securing the ends
lines 11-—11 in ‘FIG. 9'.
of said rod segments to said collars.
Referring now to the drawings, the rod type cen
2. The combination of claim 1 wherein the said rod
In the drawings:
3,100,016
3
A
segments are formed of one continuous length of spring
plurality of generally axially extending and outwardly
rod, wherein each rod segment is positioned at an angle
to a plane containing the axis of said collars and inter
secting that rod segment, and wherein each rod segment
is oppositely inclined to such a plane than each adjacent
rod segment.
bowed rod segments, each said rod segment having angu
larly oh‘set ends, each rod segment positioned at an angle
to each ‘adjacent rod segment, a plurality of circumferen
tially spaced tabs integrally formed with each collar and
protruding axially from one end of said collars, a ring
inserted coaxially with each collar and interiorly of said
_ 3. In a device of the class described, adapted to be
mounted on the outer surface of a well pipe, the combi—
tabs cooperating therewith and retaining the ends of said
nation of: a pair of axially aligned and spaced collars, a
rod segments, and each said tab secured to said ring to
plurality of generally axially extending and outwardly
10 cooperate therewith and encircle a said rod segment end.
bowed rod segments, each said rod segment having angu
larly o?set ends, each rod segment positioned at an angle
to each adjacent rod segment, a plurality of circumferen
10. The combination of claim 9 wherein the said rod
segments are formed of one continuous length of spring
I rod, wherein each rod segment is positioned at an angle
tially spaced means on each collar anchoring said rod ‘
to a plane containing the axis of said collars and inter
segments to said collars, said means including tab means 15 secting that rod segment, and wherein each rod segment
integrally formed with the collars and encircling the ends
of said rod segments, whereby said rod segments are
secured to said collars.
is oppositely inclined to such a plane than each adjacent
rod segment.
11. In a device of the class described, adapted to be
4. The combination of claim 3 wherein the said rod
mounted on the outer surface of a well pipe, the combi
segments'are formed of "one continuous length of spring 20 nation of: a pair of axially aligned and spaced collars,
rod, wherein each rod segment is positioned at an angle
a plurality of generally axially extending and outwardly
to a plane containing the axis of said collars and inter
bowed rod segments, each said rod segment having angu~
secting that rod segment, and wherein each rod segment
larly offset ends, each rod segment positioned at an angle
is oppositely inclined to such a plane than each adjacent "v ' to each adjacent rod segment, a plurality of circumferen
rod segment.
tially spaced means on each collar anchoring said rod seg
5. In a device of the class described, adapted to be
ments to said collars, said means including a pocket inte~
grally formed with the collar and a bridge element inte
mounted on the outer surface of a well pipe, the combina
tion of: a pair of axially aligned and spaced collars, a
grally formed with the collar adjacent said pocket, the
plurality of generally axially extending and outwardly ‘ : end of said rod segment inserted ‘axially through said
bowed rod segments, each said rod segment having angu 30 bridge element and terminating within said pocket, the said
larly oifsetends, each said rod segment being oppositely
bridge element and pocket enclosing said rod segment
inclined relative to each adjacent rod segment, a plurality
of circumferentially spaced means on each collar anchor- I ,
end and securing said rod segment to said collar.
12. The combination of claim 11 wherein the said
ing said rod segments to said collars, said means including
rod segments are formed of one continuous length of
a tab means integrally formed with the collars and en
spring rod, wherein each rod segment is positioned at an
angle to a plane containing the axis of said collars and
intersecting that rod segment, and wherein each rod seg—
ment is oppositely inclined to such a plane than each ad
circling the ends of said rod segments, whereby said rod
segments are secured to said collars. '
6. The combination of claim 5 wherein the said rod
segments are formed of one continuous length of spring 2 ‘ jacen-t rod segment.
rod, wherein each rod segment is positioned at an angle all)
13. In a well pipe centering and well bore abrading
to a plane containing the axis of said collars and inter‘
device, the combination of: a pair of axially aligned and
secting that rod segmennand wherein each rod segment
spaced collars adapted to be mounted on the exterior
is oppositely inclined to such a plane than each adjacent , surface of the well pipe, a spring rod assembly extending
between and mounted on said collars, said spring red as
rod segment.
7. In a device of the class described, adapted to be 45 sembly having a plurality of circumferentially spaced
rod segments extending between said collars, and each
mounted on the outer surface of a well pipe, the combina
said rod segment being bowed outwardly from said col
tion of: a pair of axially aligned and spaced collars, a
plurality of generally axially extending and outwardly ,. lars and positioned at an angle to each adjacent rod
segment.
lbowed rod segments, each said rod segment having angué
14. The combination of claim 13 wherein each said
larly o?set ends, each rod segment positioned at an angle 50
to each adjacent rod segment, a plurality of circumferen
tially spaced means on each collar anchoring said rod seg—
rod segment is positioned at an angle to a plane contain
ing the axis ‘of said collars and intersecting that rod seg
ments to said collars, said means including a tab integrally _ t ment, and wherein each rod segment is oppositely inclined
formed with the collars, an internal recess provided in said
to such a plane than each adjacent rod segment.
collars adjacent ‘the base portion of each said'itab, the
end of each rod segment inserted under the base portion
References Cited in the ?le of this patent
of each tab, the said tabs encircling said rod segment
UNITED STATES PATENTS
ends with the tab ends extending within the said ‘internal t .
1,336,673
Berntson ____________ _._ Apr. 13, 1920
8. The combination of claim 7 in which the said
axially extending r-od segments are formed of one con
1,677,050
. 1,757,777
Reed et al ______ _'_ _____ __ July 10, 1928
Martin _______________ __ May 6», 1930
tinuous length of spring rod‘ and adjacent axially ex
tending portions are oppositely inclined in relation to
2,248,160
Crawford _____________ __ July 8, 1941
2,717,650
Hall _______ __'.. ______ __ Sept. 13, 1955
2,826,253
2,881,840
Wright et al ___________ __ Mar. 11, 1958
Wright et 'al; _________ __ Apr. 14, 1959
2,903,073
2,918,974
Coyle ________ __'_. ____ __ Sept. 8, 1959
Johnson _____________ __ Dec. 29, 1959
recess.‘
the axis of the said collars.
:
‘
V
9. In a device of the class described, adapted to be
mounted on the outer surface of a well pipe, the combina
tion of: a pair of axially aligned and spaced collars, a
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