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Патент USA US2124236

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} July 19, 1938.’
Filed April 27, 1935
J_// _$
ROBERT B. Goopwnv
Patented July 19,1938
“ UNITED isTMesv PATENT clerics
JohnBfRagsdale, Whittier, and'Robert G. Good- -~
‘ ‘win; Fullerton, Calif., assignors to‘ Globe Oil
Tools Company,‘ Los Nietos, Cali?, a corpora
tion of California
Application April ‘ 27,‘ 1935, Serial No.-18,542 .
(01. 76-108)
This invention relates to- a method useful in the I the diamond substitutes or bodies of hard cutting
material may be accurately set or positioned in
manufacture of tools and relates more particu
larly to a method for setting diamond substitutes, the tool. ~
Another object of the invention is to provide a
abrasive particles, or resistant elements in- a tool
3 Claims.
5. such as a well drilling tool. A general object‘ of
this invention is to provide’ a simple, rapid and
commercially practical method for setting parti
cles or small bodies 'of 'hard cutting material or
wear resistant material in a tool.»
Well tools and other tools and devices have been
provided with inserts'of'hard cutting material and
'Wear taking elements such as tungsten carbide to
make them efficient and long wearing. One of
the most common and universal methods of pro
15 viding tools with the diamond substitutes or hard
inserts is to weld a steel‘ rodto each individual,
vinsert, pick up the insert by means of the rod
and place it on the face of'the tool and‘ then build
up the tool about the insert with'welded-ori ma;
means useful in carrying out the above-mentioned
method that slowly raises the diamond substi—r
tutes or bodies of hard cutting material to‘ a rela
tively high temperature when in a position where
they’ are conveniently accessible for setting vin
the 17001.
The Various objects and features of the inven
tion will become apparent from the following de
tailed description of a typical preferred manner
of carrying out the method of the invention, in
Fig. l'ris a view of atypical'well' drilling tool
arranged in a horizontal position illustrating a
plurality of diamond substitutes or bodies of hard
cutting material arranged in position on plates
‘ Fig. 2 is an en
20,-.tterial, which last step melts the mild steel rod ' adjacent a blade of the tool.
larged vertical detailed sectional view taken sub
from the insert. 'The diamond substitute or in
sert ‘isfsuddenly subjected t'o'high temperatures
when the rod is welded to it, which high tem
peratures are maintained for a substantial period
25,,during the process of Welding the insert to the
20 .2
stantially as indicated by line 2-2 onFig. 1 il~ ‘
lustrating the step of placing one of‘the inserts '
or bodies in a puddled portion of the tooli" Fig.‘ 3 a
is a View similar vto Fig. 2 illustrating the manner
of pushing or forcing the‘ body into the puddle,
tool. The sudden subjection of the hard cutting“ and‘
Fig. 4 is a view similar'to Fig. 2 showing the
insert or wear resistant insert? to the high welding‘
temperatures and'th'e maintenance of‘the high
body set in ‘the tool after the molten portion or
temperatures’ during the weldin'g'loperat'ion' have
30,.very deleterious effects ‘upon the insert 1 and a
more orless imperfect-bond results‘between the
insert and the welded-on metal on the face of the
puddle‘has cooled and solidi?ed.v I
the inserts are directly-set or embedded’i‘n the
original vsubstance or original metal of the tool.
Another object of the invention is to'provicle a
40 method for setting diamond substitutes‘ or wear’
tion is not to be construed as limited or restricted .
Themethod'of the present invention is adapted.
for use in the‘ manufacture of devices and tools > ‘
of various characters. Throughout the follow
detailed disclosure we will describe a typical
Another object of this invention is to‘ provide a > manner of carrying out the method in-setting
diamond substitutes in a more or less typical well
35 *method for setting diamond'substitutes or bodies 7 drillingbit, it being understood that the invenof hard wear resisting material in‘Ya tool‘in which
resistant inserts in a tool in whichithe inserts are
to the speci?c'application of the invention about
to be described, but that it is to be taken as in
cluding any features or modi?cations that may 4.0%
fall within the scope of the claims.
The particular well tool vT illustrated in the
is in the nature of a Well drilling bit
peraturesv and, therefore, are not cracked, weak- ' comprising a shoe or body Ill and spaced project
enedor excessively oxidized.
45? Another object of the invention is to provide a ing blades H. The blades II have relatively ?at
method for setting diamond substitutes or bodies forward faces or active faces I2. In the follow
of cutting and wear resistant material in a tool ing description it will be assumed that the tool
not subjected to prolonged‘e'xcessively high tem
in which the said bodies are handled at a rela
tively high temperature and while at such a tem
5O1Lperature are partially or entirely immersed in
puddled or molten portions of the tool whereby
. an effective secure bond is obtained between the
original metal of the tool and the'said bodies...
Another object of this invention is to provide
“ 555a method ofgthe character mentioned in which.
' T is a unit or single integral part, it being obvi
ous that the blades l I may be separable and that
the method of the invention may be employed in 50,,
providing the separate and individual blades H
with diamond substitutes, in which case each
blade I I may be considered a tool or cutting part.
> .The method provided by» the present inven
tion» includes, generally, the heating of the dia
mond substitutes or the bodies I4 of hard cut
ting material, or the slow raising of the bodies
I4 to a suitable relatively high temperature, the
puddling or melting of a portion of the face of
the tool T and the immersing or setting of a hot
body I4 in the molten portion of the tool.
The inserts or bodies I4 may be natural prod
ucts or may be manufactured products such as
pieces of tungsten carbide or the like. In the
10 particular case illustrated in the drawing the
below the surface I2 of the blade II the molten
metal of the puddle Il may ?ow over the upper
surface of the body I4 so that the body is com
pletely immersed in the molten metal.
Two simple effective tools may be used for
handling the hot diamond substitutes or bodies
I4 of hard cutting material and for positioning
them in the puddles in the face of the tool or
blade. One of these tools is in the form of tongs
I8.while the other is a pointed instrument or ?n
bodies I4 have substantially ?at upper surfaces ger tool I9. The tongs I8 include a body 20 of 10
and cylindrioally curved lower surfaces. It’ is to wire or other ?exible material having two nor
be understood that the bodies l4 may be of any mally spaced arms 2I. Members 22 of a material
con?guration. While the step of heating the that does‘ not tend to stick to molten metal are
15 wear resisting hard cutting bodies I4. and the
attached to the arms 2I. In practice the mem
step of maintaining the bodies I4 at a suitable bers 22 may bev sticks of carbon. The members 15
relatively high temperature may be accomplished 22 may be attached to the arms by U-bolts or by
in various manners the invention provides a; wrappedv wire as illustrated at 23. The outer
practical and convenient means for slowly rais
ends of the members 22 are preferably bevelled
20 ing the temperature of the bodies I4 to- the de
or pointed as shown to more readily engage the
sired temperature during the setting operation. inserts or bodies I4. It will be apparent how the
The invention provides plates I5 and I6 for carry
tongs I8 may be employed to pick up a particle
ing or supporting the bodies I4 in positions ad
or body I44 and place it in the puddle I1 and how
jacent the cutting part or tool. Where the in
the tongs may be used, if desired, to push the
25, serts or bodies I4 are to be set in a blade I4 of
body I4 downwardly in the puddle.
the tool T the plate I5 is arranged to extend
The ?nger tool I9 comprises a holder having a
along a longitudinal edge of the blade I l and the. head 24 and a handle 25 projecting laterally
plate I6 is set or arranged to extend along the from the head. The head 24 is tubular having
outer or lower end of the blade. The plates I5
an opening 26. A member 21 of a material such
30. and I6 constitute shelves or supports and may
as carbon is arranged through the opening 26 of 30, .I
be arranged immediately adjacent orin engage
the head 24 and is removably held therein by a
ment with the edges of the blade I I so that their‘ set screw 28. A body I4 may be readily manipu
upper surfaces are in the same plane as the
lated or shifted from a plate I5 or I6 to the
face I2 of the blade or are slightly above the
surface I2 of the blade II by the member 21
35 ;face of the blade as illustrated in the drawing;
of the ?nger tool I9 and the tool I9 may be util 35.
In the preferred manner of carrying out the ized to move the hard body into the puddle I1.
method of the invention the tool T or the blade
The end of the member 21 of the tool I9 may
I I is heated immediately prior to the setting be engaged against the'body I4 in the puddle and
of the bodies I4 of hard cutting material and forced against the body to push it into the pud
40 the heat from the blade II and the heat result
dle I’! as shown in Fig. 3 of the drawing. The
ing from the puddling operations is transferred tools I8 and I9 are sometimes used togethervor
to the bodies I4 on the plates I5 and I6 to slow
in conjunction, or they maybe’ used separately,
ly bring the bodies I4 to a suitable relatively when setting a body I4 in the face of the blade
high temperature. It is to be understood that
II. The tongs I8 may be employed to pick up
45 the bodies I4 carried on the plates I5 and I6 may
and convey the body I4 to the puddle I1 and the
be heated in other manners if desired. The dia
?nger tool I9 may be used to depress or force the
mond substitutes or bodies I4 are arranged'on
bodyv I4 into the puddle’ I1. I When the ?nger
the upper surfaces of the plates I5 and I6 ad
tool I9 is used alone it is employed to push the
jacent the edges of the blade II to be heated as body I4 to the puddle‘ I-1 and todepress the body
50 just described and to be conveniently accessible
in the puddle.
for setting in the face I2 of the blade.
_ ‘
Prior to the depressing or forcing of the insert
When the inserts or bodies I4 have been ar
or body I4 into the puddle I] the body may be
ranged in convenient positions on the plates I5 manipulated or shifted by the tools described.
and I6 a portion of the face of the blade II is
above to assume the desired position in the ?n
55 puddled or made molten to receive a body I4 of
ished tool. The immersing or forcing of the par 55..
hard cutting material. This step of the method ticle or hard body I4 into the puddle I‘! of molten
may be carried out in any well known manner, metal assures a very perfect bond between the
for example, a molten puddle such as the puddle
original metal of the tool and the diamond sub
I ‘I in Figs. 2 and 3 of the drawing, may be formed stitute or body I4. Following the setting or im
60 in the face I2 of the blade II by directing the
mersion of the body I4 the molten or puddled
?ame of an acetylene torch against that portion portion of the face of the blade II is allowed to
of the tool. While the bodies I4 on the plates cool and solidify. When the molten portion of
I5 and I6 may be warmed or heated by the ?ame the blade II cools and solidi?es the insert or
or torch forming the puddle I ‘I, they are not sub
body I4 is completely encased in and effectively
65 jected to the intense direct heat of the ?ame
bonded with the surrounding original substance
and are not injured. Immediately following the or metal of the blade II. Fig. 4 of the drawing
formation of the molten portion or puddle I‘! a
illustrates a body I4 embedded or set in the
body I4 is moved'or carried from the plate I5 or original metal of the blade II that had been
the plate I6 and is placed in the puddle I1 and is melted to'form the puddle II. It is to be noted
forced downwardly therein until it is ?ush with that the insert or body I4 is embedded and en
or below the face I2 of the blade.' The pushing cased in the original metal of the blade II and
or forcing of the hard body‘I4 into the puddle ’ that the face or surface I2 of the blade is sub
I'I assures an effective bond between the metal
stantially smooth or of the original con?guration.
forming the puddle I1 and the body I 4. When Numerous diamond inserts or bodies I4 of cut
75 ‘the insert or hard body I4 is pushed or forced ting and wear resistant material may be set or
embedded in the blade II in the manner de
scribed above.
The method provided by the present invention
may be employed to easily and quickly set dia
mond substitutes in the active parts or cutting
parts of a tool or the like.
The wear resisting
particles or bodies of hard cutting material set
by the method are not subjected to the direct
intense heat of a welding ?ame. The pressing or
10 forcing of the inserts or bodies l4 into the molten
puddles of the original metal of the tool provides
and insures a more e?ective bond between the
metal and the hard bodies than is obtained by
the welding of the hard bodies to the tool. The
diamond substitutes or hard cutting bodies set in
a tool by the method of this invention are not car
ried by or encased in built-up or welded-on extra
metal as are the diamond substitutes set by the
conventional methods, and,‘ therefore, are more
securely and dependably retained on the tool to
increase its efficiency. > The method does not
materially alter the size or shape of the tool and
provides‘ for the setting‘ of i the wear resistant
particles or bodies of hard cutting material in the
desired or preferred positions in the active parts
of the tool.
Having described only a typical preferred ap
plication and manner of carrying out the method
of the invention we do not wish to be limited or
restricted to the speci?c details set forth but wish
to reserve to ourselves any changes or variations
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. The method of setting bodies of hard cutting
material in a cutting part comprising heating the
cutting part, heating a body of hard cutting ma
terial by heat given off by the cutting part, mak
ing a puddle of a portion of the cutting part by
subjecting it to a melting temperature, and then 10
placing the heated body in the puddle.
2. The method of setting bodies of hard cutting
material in a cutting part comprising heating 'the
cutting part, positioning a body of hard cutting
material so as to be heated by heat given off 15
by the cutting part, making a portion of the
original metal of the cutting part molten by the
application of heat, immersing the heated body
in the molten'metal to bond therewith, and then
allowing the molten metal to solidify.
3. The method of manufacturing a tool com
prising heating the tool, heating a cutting part
by heat given off by the tool, forming a molten
puddle in a face portion of the tool by subjecting
it to melting heat, placing the heated cutting part
in the puddle, manipulating the part to the cut
ting position, and then allowing the molten metal
of the puddle to solidify.
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