close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2109909

код для вставки
March 1, 1938.
2,109,909
J. B. RAGSDALE
‘ROLLER CUTTER~ MOUNTING
Filed June '2, 1936
MG
w”?2” v
‘I?,
g
/
,
w/O
0,
//4.
.
#1Lw zw yw
v5
.
/
w
. [12/6 9270/67
2..
1
2,109,909
‘I Patented‘ Mar. 1,? 1938 I
UNITED ‘ STATES.
‘
PATENT OFFICE "
2,109,909 ‘r
e
‘
ROLLER corms MOUNTING
John B. Ragsdaie, Whittier, CaliL, assignm- to
Globe Oil Tools Company, Los Nietos, OaliL, a
corporation of Callfo
Application June 2, 1936, Serial No. 83,054
15 Claims.
This invention relates to well drilling tools
and relates more particularly to well drilling tools
embodying roller cuttersii; A general object of
this invention is to provide ‘a strong, effective and
particularly dependable mounting for a roller
cutter of a well drilling tool.
,
When a removable shaft or pin is employed
as a support for a roller cutter of a well drilling
and application of the invention, throughout
which description reference is made to the ac
companying drawing, in which:
.
Fig. 1 is a vertical detailed sectional view of
the lower portion of a typical well core drill 5
embodying cutters rotatably supported by the
mounting means of the invention. Fig._ 2 is a
fragmentary side elevation of the bit taken as
indicated by line 2-2 on Fig. 1 and Fig. 3 is a
fragmentary vertical ‘detailed sectional view of 10
tool the pin must be very securely locked or held
lo in place to prevent its loss and the loss of the
cutter. The threading ‘of such a cutter sup \ one of the cutter assemblies and mountings illus-.
porting pin in a particular direct-ionso that ro
trating the shape or condition of the pin prior
tation of the cutter tends to tighten the threads to being locked in place.
_
,
has been found to be insui‘?cient to prevent the
The improved cutter mounting of the present
15 loss of the cutter and pin. In instances where
invention may be embodied in well drilling tools 15 _ I
the pin is not securely locked against rotation of various types‘ and constructions and may be
the torque on the pin resulting from rotation of employed in roller well bits as well as roller well
the cutter sometimes tightens the‘ threads to the core drills. In the following detailed disclosure
extent that they ‘shear or become distorted and I will describe .a typical form of the invention
do not hold securely. The vibration stresses set embodied in a more or less typical form of well
up in a cutter supporting pin are very great and core drill, it being understood that the invention.
often cause the pin to unthread and become lost is not to be construed as limited or restricted to
even though it is threaded in to be tightened by the speci?c form or application about to be
the torque resulting from rotation of the cutter. described.
_
Another object of this invention is to provide
25
The core drill illustrated in the drawing in
a mounting for a'roller cutter of a well drilling cludes a shoe or body In threaded‘ to the lower
tool which mounting embodies a threaded cutter end of a core barrelB. The body I0 is tubular
supporting pin positively locked against rotation having'a central longitudinal opening‘ H for re
so that itcannot become lostfstrained, stripped ceiving the core and admitting itto the barrel
30 or loosened during operation of the tool in the B. Circumferentially spaced recesses l2 occur 30
in the lower end of the tubular body II] to receive
Another object of thisinvention is to- provide cutters C. In the portion of the bit shown there
a mounting for a rotatable roller cutter includ- ' are two similar recesses l2, both receiving inner
ing' a threaded pin supporting the cutter and roller cutters C for forming the inner portion of
35 very simple yet dependable means for locking the bore and for trimming the core. It is to 35
- the pin against rotation in either direction so beunderstood that the shoe or body H) has other
that its threads cannot be strained or sheared recesses for receiving‘ outer cutters and that the
‘and so that the pin vcannot become unthreaded._ improved mounting of the present invention may
Another object ‘of this invention is to provide be employed to support such outer cutters ‘as
40 a roller cutter mounting embodying a threaded-in well as the particular inner cutters C illustrated. 40v '
cutter supporting pin and means for positively
In the bit or core drill structure illustrated
holding the pin against rotation in both direc
the inner and outer walls l3 and I3“, respectively,
tions, which means does not necessitate the addi- ' of the recesses l2 are inclined downwardly and _ '
tion or employment of set screws, lock pins, cot
inwardly with respect to the central vertical
45 ter keys or similar‘ parts‘that may become lost axis of the tool. A projecting boss I4 is provided 45
or displaced.
'
well.
'
,
7
A further object of this invention is "to provide
. a cutter mounting of the character mentioned
that is simple and inexpensive and in which the
inclusion of the means for locking the pin against
rotation does not'materially add to the cost or
size of the mounting.
A
The various objects and features of‘ my inven
tion will be fully understood from the following
detailed description of a typical preferred form
i on the inner wall l3 of each recess l2 and pre-
sents a downwardly and inwardly inclined sur
face l5 substantially parallel with the opposing
outer recess wall l3. The portions of the body
III at or de?ning the outer walls of the recesses 50
[2 may be termed legs L while the portion of the
body It! at the inner sides of the recesses I! may
be termed a body wall W. The lower outer cor
ners of the legs L are rounded or bevelled as il
lustrated in the drawing.
A ?at downwardly 55
2
2,100,909
facing shoulder 15 is provided on each leg L at
municate with the outer end of the opening 34.
the lower end of ,its.wall l3‘. A similar down
wardly facing ?at shoulder I1 is provided at the
lower end or face of each boss 14. Passages or
ports l8 extend downwardly through the body
The notch 31 may be in the form of a vertical
or longitudinally extending groove in the outer
side of the leg L. When the notch 31 is of this
con?guration its lower end is in communication
l3 to discharge the circulation ?uid into the re
with the opening 34.
cesses l2.
The means 26 includes an extension, tab or
lug 38 on the head 32 cooperating with the notch
1
The roller cutters C are substantially cylindri
cal and are each provided with a central 1on
gitudinal opening 19. A socket or counterbore‘ 23
is provided in each cutter C at the inner end of
,
31. In accordance with the invention the lug 33
is an integral part of the head 32. The ing 33
is formed or provided by hammering or peening
its opening 19. The outer ends of the cutters C over an edge portion of the head 32. This form
may be ?at and normal. Suitable cutting teeth ing or providing of the lug 38 is, of course, per
2| are provided in the peripheries of the cutters _ formed subsequent to the insertion and mount
15 C to act on the earth formation.
I
The mounting means of the present invention
for supporting or mounting the two cutters C
of the typical bit illustrated may be identical and
I will proceed with a detailed description equally
20 applicable to both mountings.
'
The cutter mounting of the present inven-v
tion includes, generally, a threaded shaft or pin
25, means 28 for securing the pin 25 against ro
tation, a suitable anti-friction bearing 21 rotat
'25 ably supporting the cutter C on the pin 25 and‘
non-rotatable washers 23 and 23 on the pin 25
at opposite ends of the cutter C.
Thercutter supporting-pin 25 in addition to
supporting the roller cutter C connects or ties to
30 gether the leg L and the body wall W de?ning the
recess 12. The pin 25 has a major cylindrical
bearing portion 33 which extends through the
cutter opening 13, a ‘threaded end portion 3|
and a. head 32. Aligned openings 33 and 34 are
provided in the wall W and the leg L to carry the
cutter supporting pin 25. In ‘the particular drill
structure illustrated the openings 33 and 34 are.
inclined downwardly and outwardly with respect
to the vertical axis of the tool being substantial
40 ‘ly normal to the walls vl3 and I3. and the sur
face l5. In accordance with the invention the
ing of the cutter C, the pin 25 and the other ele
ments of the cutter assembly. As illustrated in
Fig. 3 of the drawing, the pin head 32 is pro
portioned to project some distance beyond the
outer surface of the leg L when the pin 25 is fully,
threaded in place. The lug 38 is readily formed 20
or provided by striking or hammering the pro
jecting portion of the head 32 to distort it into
the notch 31. The depression 53 is provided to
facilitate the ready forming or peeningover of >
the lug 38. The lug 33 rather closely ?ts the lower 25
portion of the notch 31 so that there is no play
or possibility of movement of the pin 33 in either
direction about its axis. The forming or peen
ing of theilug 33 as just described removes or
eliminates the projection portion of the head 32 30
so that the upper outer portion of the head 32
may be substantially ?ush with the outer surface
of the leg L.
In accordance with the broader principles of
the invention any suitable form of anti-friction 35
bearing means may be provided for supporting
the cutter C on the pin 25. In the typical case
illustrated in the drawing the anti-friction bear
ing 21 comprises amultiplicity of rollers 33 in the
opening I 9 of the cutter C, the rollers 39 of course
bear on the major portion 33-.of the pin 25 to sup- '
cutter supporting pin 25 is passed inwardly port the cutter C for free rotation on the pin.
through the openings 34 to have its portion 3| The outer ends of the rollers 38 occur at or adjae
cent the outer end of the cutter C and the inner.
threaded in the opening 33. The threaded por
ends of the rollers'33 occur at or adjacent the 45
tion
3|
of
the
pin
25
is
preferably
of
less
diameter
45
than the major portion 33 to provide the pin with bottom wall of the counterbore 23.
The washers 28 and 23 surround the pin 25 at
an annular inwardly facing shoulder 35. The
shoulder 35 is spaced outwardly some distance the opposite ends of the cutter C to receive the
_ from the surface l5 of the boss l4 to leave a space end thrusts from the cutter and to prevent the
wearing of the body l3 due‘to rotation of the 50
50 for receiving the washer 23 to be hereinafter de
scribed. The portion 3l of the pin 25 may be cutter. The washer 23 ?ts in or is received in the
counterbore 23 to have suitable clearance'with its
threaded through the entire length of the open
ing 33 and the inner extremity of thepin 25 is peripheral wall and to bear on or cooperate with
ground or cut away to be- flush with the wall of its bottom wall. The washer 23 bears against
the surface I5‘ of the boss 14 for the transmission 55
55 the opening II. The head 32 of the pin 25 is re
ceived in- the opening _34, the opening 34 being of end thrusts to the body, l3. In accordance
enlarged or provided with a counterbore to prop
A polygonal wrench»
‘
receiving socket 35 is provided in the head 32 to
facilitate theturning or threading of the pin 25.
The head 32 may be cylindrical in its general con
?guration to conform-to the opening 34. In the
preferred construction a depression 53 is provided
in .the outer end of the head 32. The depression
erly receive. the head 32.
65
53 preferably occupies a substantial portion of
the outer end of the head 32.
'
> The means 23 for holding the pin 25 against
rotation is an important feature ‘of the invention.
The means 25 operates to de?nitely secure the
70 pin 25 against rotation in both directions and thus
prevent, unthreading of the pin or straining and
shearing of its thread. The means 25 includes
or provides a notch 31 in the body [3. Where
the pin 25 is inserted inwardly through the open-
with the invention the washer 23 has an extension
or lug 43 projecting inwardly toward the central
axis of the tool. The lug 43 cooperates with the
shoulder 11 to hold the washer 23 against rota 60
tion. The annular shoulder 35 of the pin 25
may engage the inner side of the washer 23
whereby the washer is clamped between the
shoulder 35 and the surface l5 of the boss l4.
It will -be noted that the counterbore 23 of the 65
cutter C receives the washer 23 and its lug 43_
so that the washer cannot engage the core. The
socket or counterbore 23 has a depth greater
than the width of the washer 23 so that it re
ceives a portion of the boss l4. thereby allowing 70
the wall W, or the wall W and its boss l4, to
have ample stock or wall thickness for the thread
ed end portion 3| of the pin 25 without thicken
ing the entire body wall W.
75
75 ing 34 the notch 31 is preferably located to com- ‘ The washer 23 has ?at opposite faces or sides
2,109,909
for cooperating with the outer end of the
cutter
C and for bearing on the outer wall l3‘ 0! the re
cess l2. ,The washer 29 is provided with an ex
tension or lug 4| projecting outwardly at its low
er portion to cooperate with the shoulder l6. The
cooperation of the lug 46 with the shoulder l6
positively holds the, washer 29 against rota
tion. It‘will be observed that the washers 28
and 29 formed and mounted as just described
'10 limit the end movement or play of the rollers 39.
v The improved cutter mounting of the present
invention is strong and dependable and may be
embodied in a well tool without necessitating
the addition of heavy body walls, cotter .keys,
15 set screws or similar parts. The lug 38‘ may be
- easily and quickly formed following. the assem
bly'of the parts and its provision does not add
to the cost of the mounting. The lug 38 being
hammered or peened into the notch 31 closely
20 ?ts the notch to positively prevent turning of
-
3
opening and a shoulder atone end of the open
ing, a threaded pin carried in'the opening, a
head on the pin,'a peened-overllug on the head
cooperating with the shoulder to hold the pin
against rotation, and a rotatable cutter carried
by the pin.
'
6. In a well drilling tool, a body having an
opening and a preformed'notch'at an end of the
opening, a threaded pin extending through the
opening,~a part of the pin peened into the, notch 10
to hold the pin against rotation, and a rotatable
cutter carried by the pin.
7. In a‘ well drilling tool, a body having an
opening and a preformed notch at an end or
the opening, a threaded pin extending through
the opening, a head on the pin, a part on the
head peened into the notch to hold the pin
against turning, and a rotatable cutter carried
by the pin.
'
8._ Ina well drilling tool, a body having a re 20
the pin 25 in both directions and to prevent all cess
and aligned openings joining the recess, a
rotary movement of the pin. The pin'25 may be ‘pin
inserted-through
one opening and having
properly tightened in prior‘ to the forming of
the lug 38 to form a strong link or connecting tie _ an end portion threaded in .the other opening
and a head on its other end cooperating with
25 between the body wall W and the leg L. Follow
ing this tightening in of the screw 25 the form-7
ing of the lug 38 by peening or hammering locks
the pin in its tightened in position. ‘Thus the
lug 38 looks the cutter supporting pin 25 against
30 rotation in both directions to prevent unthread
ing of the pin, straining or shearing of the'
the body whereby the pin ties together the body 25
portions at opposite sides of the recess, a part
on the pin peened over to cooperate with the
body to prevent turning of the pin.
.
9. In a well drilling tool, a body having a re
cess, aligned openings joining the recess and a 30
threads of the pin and the opening 33 by'torque ' preformed notch at the outer end of one of the
on the pin and prevents loosening of the pin so
that it continues to form ‘a connecting tie be
35 tween the leg L and the wall W. The pin 25
does not become loosened or displaced during the
operation of the tool and the cutter C, the wash
ers 28 and 29, and the rollers 39 are de?nitely held
against loss in the well.
'
Having described only atypical preferred form
40
. and application of my invention I do not wish
- to be limited or restricted to the speci?c details
herein set forth, but wish to reserve to myself
any variations or modi?cations that may fall
45 within the scope of the following’ claims.
. Having described my invention, I claim:
1. In a well drilling tool, a body having a recess
and aligned openings joining the recess, a pin
inserted through one opening and threaded in
50 the other opening to extend through the recess,
a rotatable cutter carried by the pin, and means
holding the pin against turning comprisingv a
peened-over part on the pin cooperating with
the body.
55
'
’
2. In a well drilling tool, abody having a recess
and an opening joining the recess, a threaded pin
carried. in the opening and extending into the
recess, a rotatable cutter in the recess, carried
by the pin, and apeened-over part on the pin
60 cooperating with the body to hold the pin against
rotation.
,
3. In a well‘ drilling tool, a body having‘a recess,
an opening joining the recess, and a preformed
notch, a pin threaded in the opening and extend
ing through the recess, an extension on the pin
cooperating with the notch to hold the pin against
rotation, and a cutter in the recess rotatable on
the pin.
4. In a well drilling tool, a body having an
70 opening and a shoulder at one end of the open
, ing. a threaded pin carried in the opening, an
integral peened-over part on the pin cooperating
with the shoulder to hold the pin against rota—
tion, and a rotatable cutter carried by the pin.
75
5. In a well drilling tool, a body having an
openings, a pin entered through the said open
ing and threaded in the other opening, a head on
the pin cooperating with the body whereby the
pin, ties together the portions of the body at 35
opposite sides of the recess, a part on the head
vpeened in the notch to hold the pin against rota
tion, and a cutter in the recess rotatably carried
by the pin.
'
10.» In a well drilling tool, a body having a re
40
cess, aligned openings joining the recess, and a
preformed notch at the outer end of one of the
openings, a pin entered through the said opening
and threaded in the other opening, a head on the
pin cooperating with the body whereby the pin 45
ties together ‘the portions of the body at oppoe
site sides of the recess, a part on the head peened
in the notch to hold the pin against rotation, a
rotatable cutter ‘on the pin within the recess,,
wa whers on the pin at opposite ends of the cutter, 50
and lugs on the washers cooperating with-the
body to hold the washers against rotation. _
11. In a well drill, a tubular body having a
recess in its wall open at its lower end, a trans
verse opening intersecting the recess, and a pre 55
formed notch at the outer end of the opening, a
‘pin passed inwardly through the opening and
threaded in the opening at the inner side of the
recess, a head. on the outer" end of the pin co
operating with the body whereby the pin ties to to
gether the portions of the body at ‘the inner and ,
outer sides of the recess, a lug on the head
cooperating with the notch to hold the pin
against rotation, ‘and a rotatable cutter in the
recess carried by the pin.
65
I
12. In a well drilling tool, a body having an
opening and a notch at- an end of the opening, a
threaded pin extending through the opening, a
head on the pin having a depression at its outer
end, a part on the head peened into the notch to 70
hold the pin against turning, and a rotatable
cutter carried by the pin.-
.
.
'
13. In a well bit, a support having an opening,
a cutter carrying pin having a portion received 75
4-
r,
2,109,909
in the opening, and a part on the pin peened into
a part of the opening to lock the pin against loss.
15.
a. well drilling tool. two parts, one a body ‘
having an opening, theother a threaded pin in I
portion of the opening to prevent unthreading of
the pin against unthreading.
14. In a well bit, a support having an opening, the opening, a cutter supported by the pin, rind»v
a. cutter carrying screw received in the opening, a peened-over portion on one of said parts co;
parts to hold *5
and a part on the screw peened into an enlarged , operating with the other of
the screw.
‘
‘
.
JOHN B. RAGSDALE.
Документ
Категория
Без категории
Просмотров
0
Размер файла
619 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа