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Патент USA US2128416

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v
Aug. 30, 1938.
J. H. HOWARD ET AL
2,128,416
BEAMER CUTTER MOUNTING
Filed May 13, 1956
2 Sheets-Sheet 1
l @www
Aug. 30, 1938.
J. H. HOWARD ET Al.
2,128,416
BEAMER GUTTER MOUNTING
Filed May 15, .1936
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if@ma
2 Sheets-Sheet `2
2,128,416
Patented. Aug. 30, 1938
UNITED STATES PATENT oFFlcE
nEAMEn CUTTER MOUNTING
John n. Howard, Huntington Park, and Aurea c.
Oatland, Alhambra, Calif.: said Catland assign
or to Globe Oil Tools Company, a corporation
of California
>Application May 13,1936, SV_el'lall No._ 79,491
_l
8 Claims.
This invention relates to well reamers and re
lates more particularly to mountlngs for the roller
-cutters of well reamers. A general object o! this
invention is to provide improved practical and
particularly eñìcient anti-friction mountings for
roller reamer cutters.
Another object of this invention is to provide
a simple, inexpensive, anti-friction bearing means
for dependably rotatably supporting the roller
10 cutter of a well reamer. ‘
Another object of this invention is to provide
an anti-friction roller bearing means for sup
porting a roller cutter that is very easy and con
venient to assemble.
15
A
Another object of this invention is to provide
a roller bearing mounting for the roller _cutter of
a Well tool that embodies means for retaining
the rollers in position prior to and during the
insertion of the cutter supporting pin through
the cutter.
y
It is a further object of this invention to pro-`
vide an improved anti-friction ball bearing means
for rotatably supporting the roller cutter of a
(Cl. Z55-_73)
will disclose the invention embodied in a well
reamer of the general character set forth in
Patent No.- 2,035,888, issued to1J. H. Howard on
March 3l, 1935. It is to be understood that the
invention -is not to be `construed as' -limited- or 6
restricted to the speciñc constructions or appli- _
cations about to be described.
_
The well reamer illustrated in the drawings
comprises a shank or body III to be interposed
in a well >drilling string. The body I0 is an l0
elongate member provided at its ends with means
for connecting it in the string. In the case il
lustrated a. tapered threaded pin II is provided
at the upper end of the body I0 and a tapered
threaded socket I2 is provided in the lower end'15
of the body. A central longitudinal'ñuid passage
I3 extends through the _body I0 from one end to
the otherto conduct the circulation ñuid. The
intermediate portion I4 oi’ the body I0 is shaped
and proportioned to carry the reaming roller 20
cutters I5. The particular reamer illustrated
has three circumferentially spaced cutters I5 and
the body portion It is substantially triangular in
well tool that is easy and convenient to assemble
horizontal cross section._ Recesses I5 are pro
and that provides for the proper uniform distri
vided in the apex parts of the body portion I 4. 25
bution of the load or active forces throughout The recesses I 6 extend vertically or longitudinally
the length of the cutter.
.and have ilat upper and lower end walls. The
The various objects and features of our inven-- inner walls of the recesses I6 are concave and
tion will be fully understood from the following curved. The recesses 4I6 may be alike `in size
detailed description of typical 'preferred forms
and applications of our invention, throughout
and shape.
30
-
'I'he reamer cutters I5 are substantially cylin
which description reference is made to the ac
drical roller cutters. The cutters >I5 are provided
companying drawings, in which:
Fig. 1 is a side elevation of a well reamer em
with suitable teeth or cutting parts Il. Each
bodying one form of the Apresent invention.
Figs. 2, 3 and 4 are enlarged transverse detailed
sectional views taken as indicated by lines 2_2,
3_3 and 6_6, respectively, on Fig. 1. Fig. 5
-is an enlarged longitudinal fragmentary detailed
sectional viewl taken substantially as indicated
by line 5_5 on Fig. 1. Fig. 6 is an enlarged
vfragmentary vertical detailed sectional view il
lustrating the cooperation of a roller with the
spacer. Fig. 'l is an enlarged fragmentary ver
tical detailed sectional view illustrating ,the co
cutter I5 has a. central longitudinal opening I8
The several cutters I5 are illustrated as being
alike. However, the cutters may have cutting
parts or teeth Il of various characters. The
lower portions 'of the cutters I5 are preferablyl
tapered downwardly and inwardly.
40
The form of cutter mounting means of the
present invention illustrated in Figs. 1 to 7, in
elusive, of the drawings, includes, generally, a pin
20 extending through each body recess I6, series
of rollers 2l in each cutter I5 for rotatably sup- 45
operation of- a roller with a Washer. Fig. 8 is Aa
'porting the cutter on the pin 20, spacers 22 be- ,
view similar to Fig. 5 illustrating an alternative
form of bearing means and Fig. 9 is a frag
mentary vertical detailed sectional view oi a
reamer illustrating a form of ball bearing cutter
tween the series of rollers 2l, and washers 23 at
mounting provided by the invention.
The improved bearing means of the present in
vention is adapted’ to be employed in well ream
ers and well tools varying considerably ‘in char
acter. In the following detailed description we
A
extending through it from one end to the other. 35
the ends of the cutters I5. As the means for
rotatably supporting the cutters I5 may be iden- `
tical we will proceed with a detailed description 50
of the means for rotatably supporting one cutter
I5, it being understood that such description is
equally applicable to -the mountings of the sev
eral
cutters.
-
.
-
The pin 2l of the cutter mounting means Íex
2
2,128,416
tends longitudinally through a body recess I6 to
carry a cutter I5 and its bearing elements. The
pin 20 is an elongate cylindrical part whose
opposite end portions are carried by the body I0.
An opening 24 in the body portion I4 communi
cates with one end of the recess I6 and a similar
opening 25 in the body portion I4 communicates
'with the other end of the recess. The pin 20
has one end portion carried in the opening 24
and has its other end portion carried in the
opening 25. A stop 26 is provided in the opening
25 to limit the longitudinal movement oi the
_pin 20. The stop 26 'may be welded or otherwise
_secured in the opening 25.
.
15
Y Means is provided for removably locking the
pin 2U against movement. A transverse opening
21 is provided in the body portion I4 and par
tially intersects the opening 24. A notch 28 is
provided in the pin 20 to register with the open
20 ing 21. A lock pin 29 is arranged in the opening
21 to cooperate with the notch 28. 'I‘he pin 29
cooperating with the notch 28 dependably locks
the pin 26 against rotation and longitudinal
movement. Aset screw 30 is threaded in the
25 outer portion of the opening 21 to hold the pin
29 against a shoulder 3| on the wall of the open
ing 21. A cotter keyy 32 holds the screw 36
against unthreading. A reduced opening 32a
communicates with the inner end of the opening
30 21 to permit the pin 29 to be knocked out when
the screw 30 is removed The cutter supporting
pin 20 extends through the openings I8 of the
cutter I5 with substantial clearance to leave an
scribed is located intermediate the ends of the
cutter I5.
The washers 23 are provided to space the ends
of the cutter I5 and the outer ends of the rollers
22 from the endwalls of the recess I6. The
washers 23 surround the pin 20 at the opposite
ends of the cutter I5. In the preferred construc
tion the washers 23 are square or ilat sided and
are received in correspondingly shaped notches
39 occurring in-the end walls of the recess I6. 10
'I‘he washers 23 thus received in the ñat walled
notches 39 are held against rotation. In accord
ance with the invention a. lip `4|] is provided on
each washer 23 to cooperate with the inclined end
surfaces 34 of the rollers 2|. The lips 40 are an
15
nular and surround the pin 20. The lips 40
each have a tapered or inclined outer surface 4|
for cooperating with the surfaces 34 of the rollers
2| to aid in facilitating the easy assembling of
the rollers. The major exposed surfaces of the 20
washers 23 are flat for cooperation with the flat
ends of the cutter I5 and the ñat end surfaces 35
of the rollers 2|.
In assembling the cutter I5 and thev cutter
mounting just described the rollers 2| and the
spacer 22 are arrangedin their proper positions
in the opening I8 of the cutter. The washers 23
are then placed against the opposite ends of the ' -
cutter I5. With the parts in these positions the
.lips 36 of the spacer 22 cooperate with the sur
faces 34 of the rollers 2| to hold the adjacent
ends of the rollers 2| against inward displace
ment. In a like manner the lips 40 of the wash
annular space for receiving the bearing rollers 2| . ers 23 cooperate with the surfaces 34 of the rollers
.
35 and the spacer 22.
'I'he series of rollers 2| are provided in the
opening I8 of the cutter I5 to cooperate with the
wall of the opening and the pin 20 and-thus ro
tatably support the cutter I5' on the pin. The
40 rollers 2| are elongate cylindrical hardened steel
members of the proper length and diameter. In
the preferred construction illustrated, there are
two series of rollers 2| surrounding the pin 2li
and spaced apart longitudinally of the pin to be
45 within the opposite end portions of the cutter |5.
In accordance with Vthe invention the opposite
ends of thevanti-friction rollers 2| are‘bevelled
or tapered having inclined surfaces 34. The roll
ers 2| may have relatively small ñat faces 35 at
In the form of the invention
being described _the rollers 2| are positioned so
50 their extremities.
^ that their outer ends are at the ends of the
cutter I5.
.
The spacer 22 is provided to space apart the
two series of rollers 2|. 'I'he spacer 22 is in
the nature of a tube or sleeve surrounding the
pin 20 and fitting the cutter opening I8 with
suitable clearance. 'I‘he opposite ends of the
spacer 22 are shaped for cooperation with the
60 rollers 2|. A lip 36 is provided on each end of
the spacer 22.
The lips 36 are continuous or
annular. The inner sides or surfaces of the lips
36 are continuationsof the internal wall of the
spacer 22. The outer sides or surfaces 31 of the
65 lips 36 are tapered or inclined to cooperate with
the tapered surfaces 34 of the rollers 2|. .The
cooperation of the surfaces 34 and 31 facilitates
the easy assembly of the rollers 2| in the cutter
’I5 as will be subsequently described. YFlat nor
70
mal end surfaces 38 are provided on the spacer 22
at the bases of the lips 36. The end faces 35 of
. the rollers 2| are adapted to cooperate with these
surfaces-38. As the rollers 2| of the two series
75 are of the same length the spacer .22 just de
2| to Íhold the outer ends of the rollers against
inward‘displacement. Thus the lips 36 and 40
engage the ends of the rollers 2| to retain the*y
rollers in position. 'I'he cutter I5 containing the
rollers 2| and the spacer 22 is then inserted in the
recess I6, together with the washers 23 at its 40
opposite ends. The washers 23 are, of course,
entered in their respective notches 39. The pin
20 is passed inwardly through the opening 24 and
through the series of rollers 42| and thel spacer 22
to have its end portionreceived in the opening 25. 45
As above described the lips-36 and 40 retain the
rollers 2| in -place and thus facilitate the easy
insertion of the pin 2U. Following insertion of
the pin 20 the pin 29 is arranged in the opening
50.
21 and is secured in place by the screw 30.
The cutter mounting meansillustrated in Figs.
1 to '1, inclusive, of the drawings is particularly
»'simple and effective. The` spacer 22 and the
washers 23 are simple parts and cooperate with
the rollers 2| as just described to greatly facili 55
tate the assembling of the tool. The rollers 2|
operate to support the cutters I5 'with a minimum
.of friction. The parts of the cutter mountings
as well as the cutters I5 may be' easily removed
for replacement.
y
un
Fig. 8 of the drawings illustrates a form of the
invention similar to that just described. The
cutter supporting pin 20 and the spacer 22 may be
identical with the pin and spacer of the previously
described form of the invention. The anti-fric
tion rollers 2|* are of the same shape as the roll
ers 2| but are slightly shorter than the rollers 2|
to have. their outer ends some distance inwardly
from the ends of the cutter I5. The rollers -2|
have tapered or inclined end surfaces 34a. In the 70
embodiment of the invention illustrated in Fig. 8
of the drawings a spacer ring 45 is arranged in
each end portion of the cutter opening> I8 to space
the ends of the rollers 2|ß from the washer 23°.
'I'he rings 45 are provided with annular lips 408 75
2,128,416
similar in shape and operation to the lips 40. The
washers 23“ are identical with the washers 23
except that they are devoid of the lips 40. The
lips 36 and 4I)s cooperate with the inclined end
5 surfaces 34‘ of the rollers 2 I*l to retain the rollers
in position during the assembling of the cutter on
the tool. Except for thedetails just-described the
¿construction illustrated in Fig. 8 is «identical
3
n
sleeve 50 to have its inner end portion received
in the opening 25. The pin 2i)Il may be locked in
place with the pin 29 in the same manner as the '
pin 20.
,
The form of the invention illustrated in Fig. 9 C1
of the drawings dependably supports the cutter
I5 for rotation with a minimum of friction. The
balls 5I are- retained in proper' spaced relation in
with that illustrated in Figs. 5 to ’I inclusive, and
the openings 54 to assure the proper distribution -
has the same mode of operation.
of the forces. The taperedopenings 54 of .the _ 10
sleeve 50 retain the balls 5I to facilitate the easy
assembling of the pin '20“ through the cutter. It
is to be noted that the several forms of the inven
tion provide for the retention of the anti-friction
elements in their operative positions during the
assembling of _the cutter on the tool body I0 to
greatly facilitate the assembling of the tool.
‘
Fig. 9 of the drawings illustrates another form
of roller cutter mounting means. 'I‘he construc
tion illustrated in Fig. 9 of the drawings includes,
generally, a pin 2lia extending through the body
recess I6, a bearing sleeve 50 surrounding the pin
2liEL within the opening I8 of the cutter I5, steel
balls 5I carried by the sleeve 50 and washers 52
spacing the ends of the cutter I5 and the‘ sleeve
50 from the end walls of the recess I6.
The pin 20° may be identical with the pin 20
and extends through the‘opening I8 of the cut
ter I5 with clearance, leaving an annular space
to receive the bearing sleeve 50. 'I'he bearing
sleeve 50 is an elongate tubular element. The
25 sleeve 50 surrounds~ the pin 2lia with suitable
clearance and has suitable clearance with the
wall of the opening I8.- The opposite ends 53 of
the sleeve 50 may be lilat and normal and in the
same planes as the ends of the cutters I5. In ac
30 cordance with the invention a multiplicity of
openings 54‘is provided in the sleeve 5I) to re
ceive the balls 5I. 'I'he openings 54 are spaced
circumferentially and longitudinally toprovide
for the proper distribution of the load on the cut
35 ter I5 and pin 20a. In the preferred construction
illustrated the openings 54 are arranged in `a
spiralled row or series. 'I‘he openings ~54 arey
shaped to facilitate the retention of the balls 5I in
the sleeve 50. The openings 54 are tapered having
40 outwardly flared-or divergent walls.
_ ~
The anti-friction -balls 5I are provided in the
openings I8 to support the cutter. I5 for rotation
Having described only typical preferred forms
and applications of our invention, Wedo /not wish
to be limited or restricted to the specific details
hereinset forth, but wish to reserve to ourselves
any variations or modifications that may appear
to those skilled in the art or fall within the scope
of the following claims.
Having'described our invention, we claim:
1. In a well tool, a body, a roller cutter having
an opening, a pin carried by the body and extend
ing through the opening, series of anti-friction '
rollers in the opening surrounding the pin, said
rollers having reduced ends, a spacer between said
series of rollers, and lips on the spacer cooperating
withy the adjacent reduced ends of the rollers.
2. In a well tool, a body, a roller cutter having
an opening, a pin carried by thebody and extend
ing` through the opening, series of» anti-friction
rollersv in the opening surrounding the pin, said
rollers having reduced end parts, a spacer in the
cutter between the series of the rollers, lips on the
spacer cooperating with the adjacent end parts
of the rollers, washers on the pin spacing the ends
of the cutters from the body, and lips on the ,
washers cooperating with the adjacentl end parts
with a minimum of friction. The balls 5I are -oi’ the rollers.
steel balls of suiiicient diameter to properly co
3. In va well tool, a body, a -roller cutter having
” operate with the pin_20‘ and the wall of the cutter an opening, a pin carried by the body and extend 45
opening I8.- The washers 52 may be fiat surfaced ing through the opening, series of anti-friction
washers for cooperating with vthe ends of the rollers inthe opening surrounding the pin, said
cutter I 5 and sleeve 50. The washers 52 are pref
rollers having reduced end portions, washers on
erably flat sided to fit the notches 39 whereby they - the pins spacing the ends of the cutter from the `
50 are held against rotation. The openings 54 being body, and lips on the washersl cooperating with 50
in a spiralled series support the balls 5I so that
they. do not'track in their contact with the pin 20“
and the cutter I5.
adjacent end portions of the rollers.
4. A construction4 for rotatably supporting a
'
roller cutter on a Well tool bodyincluding, a pin
In assembling they construction illustrated in _ to be carried by the body vto extend through the
5 Fig. 9 of the drawings the 'sleeve 50 is introduced
or started in the opening I8 of the cutter I5.
When the sleeve 50 is in a position where its low
ermost opening 54 is adjacent the end of_ the
cutter I5 a ball 5I is inserted -in the said opening .
60 andthe sleeve is moved downwardly so that the
ball is’ entered inthe opening I8. The tapered
wall of the 4said lowermost opening 54 prevents
the ball from' falling inwardly in the sleeve while
cutter, series of anti-friction rollers surrounding
the pin to rotatably support the' cutter thereon,
the rollers having tapered end surfaces, a spacer
in the cutter between the seriesof rollers, and
annular lips on the spacer having inclined sur
faces cooperating with the a'ljacent tapered end 60
surfaces of the rollers.
-
5. A construction for rotatably supporting
roller cutter on a well tool body including, a pin
the'wall of the putter opening I8 of course pre
to be carried by the body to extend through the
vents the ball 'from falling outwardly. A ball 5I
cutter,
oi' anti-friction rollers surrounding 65
is then inserted in the next opening 54 and the the pinseries
to
rotatably
support the cutter thereon,
sleeve 50 againmoved downwardly to bring the~ "the rollers having tapered
end surfaces, washers
ball witthin the opening I8 of the cutter. This spacing the ends of thecutter'from the body, .an
procedure is repeated until a ball 5I has been nular lips on ,the washers having inclined sur
arranged in each of the openings 54. The sleeve "
50 is then entirely or substantially >entirely within faces cooperating with the adjacent tapered end 70
the cutter I5. 'I‘he washers 52 are then arranged
in the notches 39 and the cutter I5 carrying the
sleeve 50 is inserted in the recess I6. 'I'he pin 20a
is then arranged through the opening 24 and the
surfaces of the rollers, a spacer in the cutter be'- A
tween the -series of rollers, and annular lips on
the spacer having inclined surfaces cooperating `
with the adjacent tapered end surfaces of the Y
rollers.
4
2,129,416 y
adjacent tapered end surfacesfof the rollers, '
roller cutter on a well tool body including, a pin washers on the pin'at the ends of the cutter, rings
6. A construction for rotatably supporting a
l v to be carried by the body to extend through the
cutter, series of anti-friction rollers surrounding
the pin to rotatably support the cutter thereon,
on the `pin in the end portions of the cutter
spacing the rollers fromvthe washer, and annular
ridges on the rings cooperating with the adJacent
on the pin at the ends ot the cutter, rings on the
tapered end surfaces of the rollers.
,
8. A construction for . rotatably Asupporting a
pin in the end portions of the cutters spacing the
Arollers from the washer, and annular ridges on
roller cutter on a well tool.. body including, a pin
to be -carried by the body to extend through the
roller cutter on a well tool body including, a pin
ends of the-.cutter from the body, rings on the
pin betweenl the rollers and the washers, and an
nular lips on the rings cooperating with the end 15
the rollers having tapered end surfaces, washers
the rings cooperating with the adjacent tapered cutter, anti-friction rollers surrounding the pin 10
10
to rotatably support the cutter thereon, the rollers «
end surfaces of the rollers.
'
7. A construction for rotatably supporting aA having tapered end surfaces, washers spacing the
to be carried by the body to extend through the
cutter, series of anti-friction rollers surrounding
the pin to rotatably support the cutter thereon,
the rollers having tapered end surfaces, a tubular
spacer on the pin spacing the series of rollers, an
I nular ridges on the'spacer cooperating with the
surfaces of the rollers.
-JOHN H. HOWARD.
ALFRED c. CA'ILAND.
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