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Патент USA US2096234

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Oct. 19, 1937.
'
w, Q_ ERWIN
2,096,234
PIPE SWEDGE
Filed Feb. 8, 1936
F192.
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Patented Oct. 19, 1937
UNETED> STATES FATET
2,096,234
PIPE SWEDGE
Weldon C. Erwin, Huntington Park, Calif., as
signor to John Grant, Los Angeles, Calif.
Application February 8, 1936, Serial No. Y62,934
10 claims.
advantage in the following detailed description
of the invention in one of its typical and'p-referred
lapsed condition, and, if desired, simultaneously
Throughout the description Areference is had
5 to round out the pipe to substantially true cir
cularV form. While it is generally useful for
swedging allkinds of pipe, the invention has been
made particularly tot provide a tool for expand
ing and rounding out collapsed casing in wells,
and for eliminating many of the disadvantages
and undesirable features of the usual well casing
swedges.
The present tool may be characterized as a
rotatably driven type comprising a member
shaped to expand the pipe by advancement
through it, and means whereby rotation of the
driving stem causes a succession of advancing
blows to be imparted to the swedging member.
The latter operates to expand the pipe to gen
20 erally rounded form, and, for certain types of
work, the degree of expansion and rounding out
accomplished by the swedging member may be
suñicient. However, I generally prefer to include
in the tool, additional means for rounding the
25 pipe to true circular _form immediately following
the expansive action of the swedging member.
For this purpose I provide, preferably, a plurality
of circularly spaced rollers carried on the body
of the tool, these rollers ñttingthe casing closely
30 and traveling in a true circular path.
a
In'its preferred form, my improved pipe swedge
comprises a body connected with the rotatable
driving stem, a mandrel extending axially from
the body, and a tapered swedge sleeve carried on
the mandrel and movable longitudinally and ro
tatablyrrelative to both the mandrel and body.
The> body and swedge sleeve are provided with in
terengaging annular cam surfaces having abrupt
shoulders arranged so that as it rotates relative toV
the sleeve, the body slips off the shoulders and
strikes the sleeve to_deliver to it a succession of
blows at al frequency in accordance with the rate
at which the body is rotated. The sleeve thus is
driven between the collapsed walls of the pipe,
45 and immediately after the walls became expand
ed,'they are engaged by the rollers and rounded
out to true circular form.
50
(01.153451)
This invention has to Vdo with Van `improved
type of pipe swedge that operates by advance
ment through the pipe to expand it from col
In addition to the
forms.
.
«
_
_
v
to the accompanying drawing, in which:
.Y
Y
_
»
Fig. 1 is an elevation showing the swedge with
in a well casing, the body and sleeve sections
being parted to more clearly illustrateY the cam
surfaces;
'
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»
Y
Fig. 2 is a view similarV to Fig. 1 showing the
parts at the slip-off position ;Y
..
y
.
Fig. 3 is a sectional view similar to Fig. 2; and
Fig. 4 is a body section taken on line» lI-lI of Y'
Fig. 1.
.
In the drawing, the swedging tool, generally
indicated at I0, is shown positioned »within the
well casing> II ata point above the partially co-l
lapsed portion IIa thereof. For purposes of de-`
scription, the pipe swedge It) may be regarded in
one aspect as comprising a pair of relatively ro
tatable body sections I2 and I3, section I2 com
prising the swedging member which ,expands the
collapsed Lwalls IIa of the casing as it is driven
between them, and section I3 the driving mem
ber which drives the swedging member as the
two sections rotate relatively,VV section I2 has a
255
generally tapering curved shape along-its lower
surface I4 below its upper cylindric portion I5
which more or less closely nts the wall of the
casing. The'surface I4 is substantially straight
for a distance, and then curves inwardly at-its
so
lower end, as illustrated at Illa.
structurally, the tool may also be considered as
comprising a body I3, a mandrel I5 extending
axially below the lower end of the body, and
a swedge sleeve I2 which is movable longitudi
nally and rotatable relative to both the mandrel
and body i3. Longitudinal movement of sleeve
I2 on the mandrel I 5 is limited downwardly by
engagement of the sleeve Vwith an enlargement
VIëìa o-n the lower end of. the mandrel, and up
wardly by engagement between cam surface I'I
on the upper end of the sleeve with a Vcorre
spondingly shaped cam surfaceïiß on the body.
In elîect, the body I3 and mandrel I S are integral,
although for convenience in construction the
body proper may b-e formed by a sleeve 'i3d hav
efliciency and easerwith which it operates, the
present tool is characterized byY its extremely
ing a tightly shrunk fit on the upper enlarged
simple andrugged construction, and, consequent
ly, its great strength and ability to withstand
The pipe swedge is operated by a rotatably 50
driven stem which, in the present instance, con
the' severe conditions incident to its use.
The above mentioned as well as numerous fea
sists of the drill pipe I9 and a connection 23
with body I3 of the tool. The connection at Ztl
may be Vof any suitable type, and is here shown
tures and advantages of the invention will .be
diameter portion Ißb of the mandrel.
‘
55 more fully'understood and explained to better ` typically as comprising a shank 2i in the form
2
2,096,234
of an upper continuation of the mandrel |67, and
’connected to the drill string by coupling 22.
As will be apparent, both downward pressure
and rotational movement may be applied to the
tool by way of the pipe I9 and drive stem 2I..
The annularopposed end faces I 'l and I 8 of
sleeve I2 andthe body I3, are shaped to provide
inclined cam surfaces 23 and 2liV terminating
end of the mandrel is caused to impact against
the lower end of the sleeve, and therebyrdrive
abruptly at the Yvertical slip-oir shoulders 25
it upwardly from’. wedged position'in the casing.
mandrel maybe utilized to advantage in an up
ward jarring operation to free the sleeve from
the casing in the event the sleeve should become
tightly wedged within the casing.
By_repeated Y
upward jarring movements of the pipe string Ul
and mandrel, the enlargement Iëa'on thelower
spaced 180° apart. As best illustrated inV Fig.>
It may be mentioned that thelower reduced por
tion of the mandrel within the'V sleeve may be
are substantially straight, i. e., without appre"V __ made as long as is necessary or desired to en
ciable slope, as are also‘the surfaces 25 between able the mandrel to deliver to the sleeve an eiîec- Y
2, the cam surfaces 23 adjacent the shoulders Z5
the sloping cam surfaces and the bases of s-houl- j >»tive blow in the upward jarring operation.
` ItV will be understood that the drawing isV
15 ders 25.
Referring now to Fig. 3, the` upper Íend of”v merely'typical andillustrative of the invention
sleeve I2 is counterbored toy receive the large` in one of its preferred forms, and that various
diameter portion IiâbI of the mandrel, andl to changes in modiñcations may be made without
provide a stop shoulder 21 which is engagedby departure from theinvention in its true spirit
and scope. Í
20 the mandrel to limit downward movement of the
body I3 relative to sleeve i2 and to preventcam '
~\
.~
-V
l
surfaces 23 on the body from engaging the'sleeve
'1. Inra pipe swedge, a body comprisingY a mem-«
surfaces 25,k when the parts have rotated rela-` ber shaped to expand the pipe from_ collapsed
ÑIclaim:
v tively to the slip-off positionof Fig. >2.
25
i
l
.
condition by advancement through the pipe, driv-V
kAs best illustrated in Fig. 4., the body Iä'coni
tains a> Yplurality of vertically extendingr and
ing means connectedto Vsaid body, and means
adapted to be insertedwithinthe pipe and co
equally circularly spaced recesses 2S, the upper ' acting with said memberto transmit> thereto a ,
ends. of which are` closed by a Vretaimîng ring .2d
succession Vof advancing blows by rotation of said
secured to the body by screws'îl‘iii. Ring 29 bears
drivingmeans.
' 2. In a pipe swedge,
Y Y
a 'body
Í> comprisingla
,
-Y ..~
» mem
r30 against the mandrel shoulder@ to'prevent me n
Vber lßhfrombecoming jarred loose, and moving
ber sl'iapedV to expand the pipe from collapsed
upwardly in the mandrel from the position shown, ' condition by advancement through the pipa-»drive
as a result of the repeated downward impacts oi ing means connected .to said body, means adapted
lëb against the sleeve I2 during .operationof to be inserted within the pipe and'coacting with
Ythe tool. Recesses 28 contain rollers 3l which said member to transmit thereto a succession of
project slightly beyond the cylindric surface >of advancing blows byrotation of said driving means,
the VVbody, the circular extentof the recesses be. and means operated byrotation of said driving
ing sufficient toretain the rollers.V Preferably, Y means for roundingout the pipe after
the rollers ñt the recesses with suiîicient loose Y been expanded Vby said member. .
40 ness as to permit their rotation while in engage
ment with the casing during rotation of the body.
43. In a pipe swedge, a body comprising a meml 40,
ber having a longitudinallycurved tapered sur
In well casing swedging operations it may be
desired t@ maintain a flow ofv circulating iiuid
through the tool so that the fluid will be dis-k
face adapted to engage-and expand the pipe from
collapsed conditionrby` .advancement through the
charged inthe vicinity of the swedging sleeve.
For this purpose I drill the full length of the
mandrel Vto» provide a bore 4I through which
the fluid is discharged downwardly from pipe I9
through the tool and out vthe lower enlarged;
end Ißa of the mandrel.
Y
`
. b
VIn operation, the tool is lowered within the
casing on the lower end of the drill string until:
the swedge sleeve l2 engages'the collapsed wall
IIa. Thereupon, the pipe string is rotated and
55 the necessary amount of weight applied to the
swedge sleeve via engagement with the body I3
at the cam surfaces I'I and I8. As the pipeV isV
rotated in the direction of theV arrow, bodycam
» surface i3' rises over the sleeve surface Il and,
60
twice during one complete revolution, theY body
shoulders 25 slip-off the corresponding shoulders
on the sleeve, vcausing the mandrel to impact
downwardly against the sleeven counterbore
pipe, driving means connected to said body, meansadapted to be inserted within the pipe and Vco
acting with said member to transmit thereto "a, `
succession of advancingblows by rotation of saidV
driving> means, and a plurality Íof rollerscarried
by said body and` operating to round out the pipe
after
4. Ina
it has
pipe
been
Yswedge,
Vexpanded
a body
by adapted
said member.
tol-be in 50
serted, in a pipe» andcomprising afpair of rela
tively rotatable sections, one» of. said sections being
adapted to> engage and expand the pipe from col
lapsed condition by advancement >through the
pipe, .rotatable driving means Aconnected to said
body and adapted to cause said sections to rotate
relatively, and means `for Vtransmitting to the firstV
mentioned body section-a succession of advancingv
blows by ¿virtue Vof» relative rotation between the
sections„l
..
"
~
'
~
'
»
Y
.
ce
‘
5., Ina 'pipe swedge, a body adapted `to be in
Vserted-„in `a pipe and comprisinga pair of relae `
shoulder 2l, see Fig. 3.v Thus as the body rotates tively rotatable sections, one of said sections being
Ye5 relative to the sleeve, thelatteris subjected to Y adapted to engage and expand the pipe from col V65
a succession oi" downwardly'ap-plied '_blows, act,
ing to drive` it between the collapsed walls ila
of the casing and toV expand the latterV to the
diameter of the upper, portion I5 of the sleeve.
The casing then is rounded out to true circular
A form by the action of the equally spaced rollers
3l whose outer peripheries travel a true circular
path,
V
~
|The provision for substantial relative longi
tudinal movement between the sleeve l2 and
V
lapsed condition by advancement through Ythe
pipe, rotatable drivingsmeans connected tofsaid
body and adapted to cause said sections,k to` ro
tate relatively, means for transmitting to- the
first mentioned body section a succession of ad
vancing blows by rotation of said driving means,
and meansoperated >by the ¿driving means -for
rounding out the pipe after it has been expanded
by the first mentioned body section.A
.
e
6. In a »pipe swedge,Y a body adapted to »be
3
` 2,096,234
inserted in a pipe and comprising a pair of rela
tively rotatable sections, one of Vsaid sections
being adapted to engage and expand the pipe
from collapsed condition by advancement through
the pipe, means carried by the other of said sec
tions for rounding out the pipe, rotatable driving
means connected to said body and adapted to
cause said sections to rotate relatively, and means
for transmitting to the first mentioned body sec
tion a succession of advancing blows by virtue
of relative rotation between the sections.
'7. A pipe swedge comprising a body adapted
to be inserted in a pipe, a mandrel extending
axially from one end of said body, rotatable driv
15 ing means extending from the opposite end of
the body, a swedge sleeve mounted on said man
cession of advancing blows upon rotation relativeV
thereto, >and means carried by said body 'for en
gaging and rounding out the pipe.
.
9. A pipe swedge comprising a body adapted to
be inserted in a pipe and a mandrel extending
axially vfrom one end of said body, rotatable
driving means extending from the opposite end
of the body, a swedge sleeve mounted on said
mandrel and movable longitudinally and rotat
ably relative to both the mandrel and body, inter 10
engaging annular cam surfaces on said body and
sleeve having abrupt slip-oil shoulders, whereby
the body imparts to the sleeve a succession of
advancing blows upon rotation relative thereto,
and a plurality of rollers carried in cìrcularly‘ 15
spaced recesses in the surface of said body.
drel and movable longitudinally and rotatably
10. A pipe swedge comprising a body adapted tov
relative to both the mandrel and body, and inter
engaging annular cam surfaces on said body and
be inserted in a pipe and a mandrel extendingy .
sleeve having abrupt slip-01T shoulders, whereby
axially from one end of said body, rotatable driv
ing means extending from the opposite end of the 20
the body imparts to the sleeve a succession of ad
vancing blows upon rotation relative thereto.
8. A pipe swedge comprising a body adapted
body, a swedge sleeve mounted on said mandrel
to be inserted in a pipe and a mandrel extending
nular cam surfaces on said body and sleeve having '
axially from one end of said body, rotatable
driving means extending from the opposite end
of the body, a swedge sleeve mounted on said
mandrel and movable longitudinally and rotat
ably relative to both the mandrel and> body, in
'terengaging annular cam surfaces on said body
and sleeve having abrupt slip-off shoulders,
whereby the body imparts to the sleeve a suc
and movable longitudinally and rotatably relative
to both the mandrel and body, interengaging an
abrupt slip-off shoulders, whereby the body im V25
parts to the sleeve a succession of advancing blows
upon rotation relative thereto, a plurality of roll
ers carried in circularly spaced recesses inthe
surface of said body, and a roller retaining ring
closing the ends of said recesses and secured to
the body.
.
,
WELDON C. ERWIN.
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