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Патент USA US3071406

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Jan. 1, 1963
c. R. NEILQN
3,071,396
MULTIPLE STRING TUBING HANGER CONSTRUCTIONS
Filed March 26, 1959
3 Sheets-Sheet 3
/60
T
E- E-
5.2- E 5
INVENTOR
CLAUDE
R.
NEILON
BY
ATTORNEY5
i
3,171,396
ttes
Patented .lan. l, 1963
1
2
an improved hangerv construction for multiple well com
3,071,396
pletion.
MULTELE STRENG TUBING HANGER
Another object is to provide a multiple tubing string
hanger construction for multiple well completion.
(IONSTRUCTHONS
Claude R. Neilon, Houston, Tex., assignor to Armco
A further object of the invention is to devise a multiple
gt?el
Corporation, Middletown, Ohio, a corporation of
10
string tubing hanger so constructed that the supporting
Filed Mar. 26, 1959, Ser. No. 802,104
‘7 Qlaims. (Cl. 285-137)
This invention relates to the art of multiple well com 10
pletion and particularly to novel and improved multiple
string tubing hanger constructions.
It frequently occurs that a well will traverse a plurality
of formations each of which is to be produced and for
this reason it has become common practice to employ in
such wells at least two tubing strings each extending to
and in communication with a different one of the forma
element for at least one of the tubing strings can be low
ered past the hanger means after the hanger means has
been landed in the tubing head or like head member.
Another object is to devise a multiple string tubing
hanger wherein hanger means is temporarily attached to
a tubing string, so that the hanger means can be landed
in the tubing head or the like, and the tubing string can
thereafter be freed from the hanger means for rotation
and vertical movement in both directions.
A still further object is to provide a multiple string
tubing hanger wherein the tubing strings are free to ro
tions. Thus, in a typical installation, a ?rst, long tubing
tate after the hanger member and tubing strings have been
string may extendto a lower formation, being “packed
installed.
off” above the lower formation by a packer and being in 20
Yet another object is to devise a multiple string tubing
communication only with the portion of the Well below
hanger comprising one primary hanger member adapted
the packer, and a second, shorter tubing string may extend
to be seated in a tubing head or the like, the construction
to and communicate with an upper formation, above the
packer for the ?rst tubing string. Such practice necessi
being such that the hanger member can be attached to
an element of the tubing string and landed in the tubing
tates the hanging of both tubing strings by what is now 25 head by manipulating the tubing string, and the tubing
string can then be detached from the hanger member,
further lowered to place a packer or like downwell equip
ment, and again raised and supported on the hanger
termed a multiple string tubing hanger cooperating with
one of the well head members, usually the tubing head.
Particular di?iculties arise in designing truly satisfactory
hanger means because the entire multiple string hanger
member.
construction must be disposed within the bore of the 30
In order that the manner in which these and other ob
tubing head or other head member or members, so that
jects are attained in accordance with the invention can
the designer is faced with severe limitations as to size and
be understood in detail, reference is bad to the accom
shape.
Such multiple string tubing hangers have been con
structed in 'various fashions. Thus, in accordance with
one prior art proposal, a split hanger is employed, com
prising, in the case of a dual string installation, a pair of
hanger members of semi-cylindrical con?guration, the
hanger members being arranged with their ?at faces in
contact. While such a split hanger construction offers
various advantages, it has the distinct disadvantage that,
panying drawings, which form a part of this speci?cation,
and wherein:
FIG. 1 is a vertical sectional view of a dual string tubing
hanger construction in accordance with one embodiment
of the invention;
FIG. 2 is a horizontal sectional view, taken generally
on line 2——2, FIG. 1, with one tubing string supporting
4:0 element removed and with the other shown in top plan
elevation;
considering the hanger in its ?nally assembled condition
within the tubing head or the like, the tubing stringers
are threaded to the hanger members and, since the hanger
FIG. 2;
members cannot be rotated relative to each other, the
tubing strings cannot be rotated relative to each other. A
line 4—4,-. FIG. 2;
further disadvantage arises with the split hangers because,
FIG. 3 is a vertical sectional view taken on line 3-3,
FIG. 4 is a fragmentary vertical sectional View taken on
FIG. 5 is an exploded perspective view of the device of
FIG. 1; and
once the hanger members have been landed in the tubing
FIGS. 6 and 6a are diagrammatic illustrations illustrat
head or the like, vertical movement of the tubing strings
ing the manner in which the tubing hanger construction
is possible only if the hanger member or members are 50 of FIGS. 1-5 is employed.
removed from the head.
Referring now to the drawings in detail, the embodiment
It has also been proposed to provide a hanger construc
of the invention here illustrated comprises a cylindrical
tion wherein all of the tubing strings are supported by a
hanger member 1, a pair of identical cylindrical hanger
single, generally cylindrical hanger member which com
couplings 2 and 3, employed as tubing string support
pletely ?lls the bore of the tubing head or the like. While 55 elements, and a packing assembly 4. Hanger member 1
some such constructions allow upward movement of the
is of such size as to ?t within the bore 5 of a tubing
tubing string after the hanger member has been landed,
head or other head member 6.
such arrangements do not allow any of the tubing string
supporting elements to be lowered past the hanger mem
ber.
ber 6 is interrupted by a transverse, annular, tapered
shoulder 7 and hanger member 1 has its lower end suit
ably chamfered to provide a tapered, annular face to be
brought into supporting engagement with shoulder 7.
To accommodate the tubing strings, hanger member 1
is provided with an axially extending passage 8 includ
ing two coupling-receiving portions 9 and 10, FIG. 2,
separated by an enlarged central portion 11. The hanger
Freedom of rotational and vertical movement of at least
one of the tubing strings after the hanger member has
been landed is of particular importance in two regards.
First, rotation of one tubing string about its axis is of
great help in avoiding “fouling” of the tubing strings in the
well while the strings are being run in. Next, both rota
tion and vertical movement allows a packer-equipped
tubing string to be hung in tension, or to be run down
Bore 5 of head mem
member has a ?at upper face 12 which is disposed hori
zontally when the bottom of the hanger is seated on
shoulder 7.
_
Each of the couplings 2 and 3 includes an intermediate
the well to install the packer, then disengaged from the
70 portion of larger outside diameter, indicated at 2a and 3“,
packer and then re-engaged therewith.
respectively, and a lower portion of smaller outside diam
' A general object of the present invention is to provide
eter, indicated at 2*“ and 3b, respectively. The two por
3,071,396
tions 2a and 2b are joined by a downwardly and in
wardly slanting shoulder 13. Similarly, the portions 3a
and 3b are joined by a downwardly and inwardly slant
ing shoulder 14. Adjacent shoulder 13, a circular, shallow,
outwardly opening, transversely extending groove 15 is
provided in portion 2b of coupling 2. An identical groove
16 is similarly provided in portion 3b of coupling 3. The
other end portion 2° of coupling 2 is of smaller outer
A.
passage portion 10 is of such diameter as to freely pass
the collars of the tubing string attached to coupling 3.
Though interrupted by the openings de?ned by edges
24, 2S and 27, 28, the wall of intermediate passage por
tion 11 is cylindrical. The diameter of portion 11 is
sut?ciently large to freely pass either of couplings 2, 3.
Hence, considering that hanger member 1 has been seated
in head member 6 in the manner shown in FIG. 1, and that
one of the couplings is seated in the head member and
its other end portion 3° of smaller outer diameter than 10 supports a tubing string, it will be clear that if such
coupling is raised su?iciently to clear the hanger member,
intermediate portion 3“.
the coupling and tubing string can then be shifted lateral
End portion 2b of coupling 2 is interiorly threaded, as
ly, so that the tubing string passes through intermediate
seen at 17, for connection to the tubing string to be sup
passage portion 11, and the tubing string and coupling
ported by the coupling. Portion 2° of coupling 2 is
can then be lowered freely through portion 11.
similarly threaded interiorly, as seen at 18, for connec
As will be clear from FIGS. 2 and 3, hanger member
tion to a handling joint. At its tip, portion 2c is provided
1 is provided with a pair of diametrically opposed vertical
with an interiorly disposed, inwardly tapering, frusto
slots 30 each having a downwardly and outwardly ?ared
conical seat 19 to be engaged by a sealed coupling ele
lower end portion. At each slot 30, the hanger member
ment to provide a flow passage from coupling 2 to the
diameter than portion 2a, and coupling 3 similarly has
well head equipment to be mounted on head member 6. 20 is provided with an upwardly and inwardly extending
Portion 3b of coupling 3 is interiorly threaded, at 20,
for connection to the tubing string to be supported by
that coupling. Portion 3° of coupling 3 is interiorly
threaded at 21 for connection to a handling joint. At its
tip, portion 3° is provided with an inwardly tapering,
frusto-conical seat 22 identical with the aforementioned
seat 19 and for the same purpose.
Portion 9 of passage 8 in hanger member 1, adapted
to receive portion 2b of coupling 2, has a part-cylinder
bore 31 in which is slidably disposed a cylindrical de
tent 32, a compression spring 33 being disposed behind
the detent to urge the same outwardly.
A stop pin 34 is
provided to retain detent 32 in its bore. Head member
6 is provided with a pair of radially extending, diametri
cally opposed bosses 35 each having a through-bore 36
opening into the interior of the head member and dis
posed radially with respect to the head member. A por-'
tion of bore 3-6 is threaded to engage exterior threads on
wall extending for somewhat more than 180”, the diam 30 a hold down screw 37, the arrangement being such that
when the hold down screw is fully inserted, the tip por
eter of this wall being slightly larger than the outer diam
tion thereof projects into the bore of head member 6, at
eter of coupling portion 211. At upper face 12, passage
a point above shoulder 7, the projecting portion of the
portion 9 terminates in a downwardly and inwardly
hold down screw being shorter than the depth of slots
slanting, circularly extending seat or shoulder 23 so dis
30. As will be clear from FIG. 3, the arrangement is
posed as to come into face-to-face contact with shoulder
13 of coupling 2 when portion 2b of the coupling is fully
such that, as hanger member 1 is lowered into bore 5 of
inserted in passage portion 9, as seen at FIG. 1.
the head member, the outer end face of each detent 32
will engage the projecting tip of one of the hold down
screws 37, so that the detents are cammed inwardly
Passage portion 9 communicates with the enlarged
central or intermediate passage portion 11 via an open
ing de?ned by vertical edges 24, 25, FIG. 2. At top face 40 against the biasing action of springs 33. As the head
member seats against shoulder 7, the detents 32 pass the
12 of the hanger membenjpassage portion 11 terminates
tips of hold down screws 37 and are snapped outwardly
in downwardly and inwardly slanting surface 26 which,
by springs 33, again coming to rest against stop pins 34
as will be clear from FIG. 2, joins shoulder or seat 23
and are now engaged beneath the tips of the hold down
at edges 24, 25. Since the cylindrical wall of passage por
tion 9 extends for more than 180°, and since this wall 45 screws to retain the hanger member in place in the head
member. The ?ared lower end portions of slots 30 fa
closely embraces cylindrical coupling portion 21’, it is clear
cilitate alignment of the slots with the projecting tips of
that, when the coupling is fully supported, as seen in
FIG. 1, the coupling cannot be moved laterally from
hold down screws 37.
The hanger construction is completed by packing assem
passage portion 9 into central passage portion 11 but
is rather retained and positioned in passage portion 9. 50 bly 4 which comprises a lower cylindrical member 38 hav
However, the diameter of the cylindrically extending wall
ing a ?at bottom face to engage top face 12 of hanger
of passage portion 9 is sufficiently large to pass the tubing
member 1, the member 38 being provided with a pair of
collars of the tubing string to be supported by coupling
parallel, spaced throughbores to accommodate couplings
2. The opening de?ned between passage portions 9 and
2 and 3. Resting against the top of member 38 is a cylin
11 by edges 24, 25 is suf?ciently wide to allow the tubing 55 drical packing element 39, of rubber or the like, the pack
string to be shifted laterally from passage portion 9 into
ing element 39 also being provided with throughbores to
accommodate couplings 2 and 3. The packing assembly
passage portion 11.
Portion 10 of passage 8 is identical to passage portion 9
is completed by a cylindrical rigid upper member 40 hav‘
and communicates with intermediate passage portion 11
ing throughbores to accommodate couplings 2 and 3 and
via an opening de?ned by vertical edges 27, 23. At 60 provided with a flat bottom surface to engage the top of
top face 12 of the hanger member, passage portion 10
packing element 39. Upper member 40 has two periph
terminates in downwardly and inwardly slanting surface
erally located downwardly and outwardly slanting sur
29, FIG. 1, which joins surface 26 at edges 27, 28 and
faces 41 which are diametrically opposed and adapted to
is adapted for face-to-face contact with shoulder 14 of
be engaged by the frusto-conical tip portions of radially
coupling 3 when portion 3*’ of the coupling is fully in
65 disposed packing~energizing screws 42 in such fashion
serted in passage portion 10. As is the case with por
tion 9, the wall of passage portion 19 extends for some
what more than 180° and closely embraces cylindrical
that, as the screws 42 move inwardly, upper member 40
the packing assembly is urged downwardly to compress
packing element 39 in order to accomplish a good seal be»
tween head member 6 and couplings 2 and 3. Parts 33,
is fully inserted in passage portion 10, the coupling is con 70 39 and 40 of the packing assembly are held in assembled
relation-ship by a pair of cap screws 43 extending down
?ned and cannot be shifted laterally from passage portion
wardly through members 40 and 39 and threaded into
10 into passage portion 11. The opening de?ned by ver
member 38.
tical edges 27, 28, ‘is, however, of such width as to allow
Hanger member 1 is provided with at least one laterally
the tubing string attached to coupling 3 to pass laterally
from portion 10 to portion 11 of passage 8. Again, 76 projecting bore 44 extending radially with respect to pas»
coupling portion 3*’. Thus, when coupling portion 3b
3,671,396
sage portion 9 and disposed to open toward groove 15 of
coupling 2 when the coupling is fully inserted in the
hanger member. At its inner end, bore 44 has an in
wardly directed stop shoulder 45.
Normally urged
against shoulder 4.15 by a compression spring 46 is a de
tent ball 47, spring 46 being held in compression between
ball 47 and a threaded plug 48. The detent means just
again fully seated, as illustrated in FIG. 6a. Thus, the
?rst tubing string has now been hung in tension.
The second, shorter, tubing string is now run in and
the remaining coupling attached to the last joint thereof.
A handling joint is attached to this coupling and manipu
lated to seat the coupling in the remaining coupling and
manipulated to seat the coupling in the remaining cou- _
described provides a releasable connection for attaching
pling-receiving bore portion 9, 1d of hanger member 1.
the hanger member l to coupling 2. It will be under
It will be understood that the tubing strings are ordinarily
stood that when the coupling is fully seated, the detent 10 both very long and there is hence a tendency for the
ball 47 extends into shallow groove 15 but that when a
tubing strings to wrap around each other and thus be
su?icient upward force is applied to the nipple, the lower
come “fouled” as the second tubing string is run in. To
side wall of the groove 15 will cam ball 47 inwardly of
avoid this, when the hanger construction of the present
bore 44, against the biasing action of spring 46, so that
invention is employed, the ?rst tubing string can be ro
the coupling can be withdrawn from passage portion 9.
In this embodiment, since the couplings 2 and 3 are
identical, an identical releasable detent means is provided
for attaching the hanger member to coupling 3. This
detent means is indicated generally at 49 in FIG. 2 and
need not be described in detail, its operation being pre 20
cisely as just explained.
tated relative to the hanger member at any time while
the second tubing string is being run in.
The handling joints having been removed, packing as
sembly 4 is then lowered into place and the hanger con
struction is “packed off” by threading in the packing
energizing screws 42.
The blowout preventer means is
removed and the bonnet-master-valve-tree bolted in place
To complete a well with the hanger construction here
on flange 50 of the head member e.
in shown and described, it will be understood that the
I claim:
head member 6 is ?rst installed on the well and that the
1. For use in a multiple completion well installation
usual blow-out preventing means (not shown) is bolted to 25 including at least one downwell packer disposed between
the upper ?ange 5d) of the head member. The ?rst tubing
production strata, and a head member mounted at the
string, ordinarily the longer of the two strings and usual
top of the well and having an upright bore therethrough,
ly equipped with a packer or similar down-well equip
the combination of
ment to secure the lower end portion of the string and
a multiple string tubing hanger member adapted to be
accomplish the desired seal, is run into the well. One
seated in the bore of the head member,
of the couplings 2, 3 is then attached to the last joint of
said hanger member being provided with an upright
this tubing string and hanger member 1 is then attached
passage to accommodate a plurality of tubing strings,
to the coupling by means of the releasable detent con
said passage including a plurality of support-re
stituted by ball 4'7 and the cooperating groove 15 or 16
ceiving portions spaced laterally outwardly of the
in the coupling. With regard to attachment of the hang
er member, it will be noted that the coupling can ?rst
be attached to the last joint of the tubing string and
hanger member ll then lowered over the coupling with
the coupling passing through enlarged central passage
portion 11 thereof, until the hanger 1 is located below the 40
coupling. The hanger member is then shifted laterally,
the tubing moving through one of the lateral openings de
?ned by edges 24, 25 and 27, 28. The hanger member is
then moved upwardly so that the lower end portion of
the coupling is inserted in one of the passage portions 9, 45
it).
As the coupling seats on the hanger, the ball of the
detent snaps into the cooperating grooves of the coupling.
A handling joint is then screwed into the upper end of
the coupling and the tubing string is lowered until hanger
center of said hanger member and interconnected by
an intermediate portion of larger transverse dimen
sion than said support-receiving portions; and
a plurality of tubing string support elements each
adapted to be attached at its lower end to a tubing
string to be suspended therefrom, each of said sup
port elements having a lower end portion of such
size and shape as to be received in a di?’erent one
of said support receiving portions of said passage,
said hanger member and said support elements being
provided with cooperating support surfaces which
extend transversely of said passage to support said
support elements on said hanger member when said
support elements are received in the respective ones
of said support-receiving passage portions,
member 1 seats against shoulder '7 of the head member. 50
at least one of said support elements having a maximum
screws 37 enter slots 30, detents 32. are cammed inwardly
and, as the hanger member seats, the detents engage un
der the tips of the hold down screws, so that the hanger
member is now locked in place in the bore of the head 55
passage portion so as to be capable of being ?rst
During such operation, the projecting tips of hold down
member.
Assuming that it is desired to hang this ?rst tubing
string in tension before hanging the second tubing string,
an upward strain is now applied to the handling joint,
releasing the coupling from hanger member 1 by action 60
of the detent ball and its cooperating groove in the cou
pling. The tubing string is raised until the coupling clears
the hanger member and is then shifted laterally and cen
tered with respect to enlarged passage portion 11. The
tubing string is now lowered, as illustrated in FIG. 6a, 65
the coupling passing through enlarged portion 11 of the
passage, and is manipulated in the- usual fashion to set
the packer 663 in the bottom of the well and thus secure
the lower end of the tubing string. An upward strain
is again applied to the tubing string and the coupling 70
is passed back through central portion 11 of the passage
in hanger member 1, the tubing string then being shifted
laterally to a position within either portion 9 or it) of
the hanger member and lowered until the coupling is 75
transverse dimension smaller than said intermediate
passed downwardly therethrough, to enable the tub
ing string to which it is attached to be engaged with
and held by the downwell packer against axial move
ment, and then moved upwardly through said in
termediate passage portion, shifted laterally and
placed in the appropriate one of said support-re
ceiving portions, such upward movement placing the
tubing string under tension, by reason of the fact
that the tubing string is engaged with and held by
the downwell packer, which tension is maintained
when said support element is supported on said
hanger member,
the one of said support-receiving passage portions in
which said one support element is received com
municating with said intermediate passage portion
via lateral opening of a width capable of passing
the tubing string to which said one support element
is attached.
2. Apparatus in accordance with claim 1 and wherein
said tubing string support elements are cylindrical,
said support-receiving portions of said passage each
have a transverse cross section which de?nes a por
tion of a circle greater than 180°, and
3,071,396
7
.8
each of said support-receiving portions of said passage
communicates with said intermediate passage por-
able the tubing string to which it is attached to be
engaged with and held by the downwell packer
tion via an opening of such width as to allow the
against axial movement, and then moved upwardly
tubing string supported by the corresponding one of
said‘ support elements to be shifted laterally from
through said central portion, shifted laterally and
5
placed in the appropriate one of said part-cylindrical
such support~receivng portion into said intermediate
passage portion.
3. Apparatus in accordance with claim 2 and wherein
at least one of said support elements and said hanger
member are equipped with a releasable attaching 10
means comprising
a detent carried by said hanger member,
said one support element having in its lower por-
portions, such upward movement placing the tubing
string under tension, by reason of the fact that the
tubing string is engaged with and held by the down
well packer, which tension is maintained when said
tion a transverse outwardly opening groove to
receive said detent, and
15
resilient means biasing said detent into the one
support element is supported on said hanger member,
the one of said lateral openings associated with the
part-cylindrical passage portion for said one sup
port element being su?iciently wide to pass the tub
ing string to which said one support element is at
tached.
5. A wellhead construction in accordance with claim
of said support-receiving portions in which the
4 and wherein
lower portion of said one support element is to
each of said part-cylindrical portions extends for more
be disposed,
than 180°, and
said attaching means being operative to attach said 20
the diameter of each of said lower portions is greater
hanger member to said one support element for land-
than the Width of the corresponding one Of Said
ing of said hanger member in the bore of the head
lateral Openings
member by a handling joint attached to said one
6. A wellhead construction in accordance with claim
support element,
5 and wherein
said attaching means being effective to release under 25
Said Central Passage Portion i5 eyhndfieah and
upwardly directed axial Strain on Said on‘; support
the wall of each of said part~cylindrical portions ter
element when said hanger member is held against
minaies in upright Parallel edges de?ning Said latem1
upward movement in the head member, whereby
Openings
Said one Support element can be detached from Said
7. A well head construction in accordance with claim
hanger member and manipulated independently after 30 4 and wherein
_
_
_
said hanger member has been seated in the bore of
the head member_
4. For use in a multiple completion well installation
including at least one downwell packer disposed between
production strata, a well head construction comprising, 35
in combination
a head member to be mounted at the top of the well
and having an upright here to Communicate with
at least one of 531d wbms sh'lng Support elements and
said hanger member are equipped with releasable
‘attaching means Comprising
a deteht Carried by Said hanger member,
the cylindrical lower Portion of said 0he Support
element having a transverse outwardly opening
groove to reeeive Said detent, and
resilient means biasing said detent into the one
the interior of the W611;
a cylindrical hanger member of such diameter as to 40
of said part-cylindrical passage portions in which
The lower Portion of Said One Support element
be insertable downwardly into said bore, said head
member and said hanger member having cooperating
shoulder means to support said hanger member on
said head mgmber, Said hanger member ?lling Said
bore when 50 Supported,
45
said hanger member having a single upright passage
to accommodate a plurality of tubing strings, said
passage including an enlarged central portion and a
_
1S tohe disposed,
_
_
_
said attaching means being operative to attach said
hanger member t0 Said one Suppert elefnent for
landing of said hanger member in said bore of said
head member by manipulation of a handling joint
hunched to Said one Support element,
said attaching means being effective to release under
uPVl/Endly directed axial Strain on said one Support
plurality of smaller, part-cylindrical portions spaced
member When Said hanger member is held against
outwardly from said central portion and each com- 50
municating with said central portion via a lateral
upward movelnent in said here, whereby Said One
Support element can be detached from Said hanger
member and manipulated independently after said
opening;
'
a plurality of tubing string support elements each having a cylindrical lower portion adapted to be attached to a tubing string and of such diameter as 55
to be capable of being passed downwardly into one
of said part-cylindrical passage portions,
said hanger member and said support elements having
cooperatlng support surfaces which extend trans-
’
hanger member has been seated in Send heed mem
her
References Cited in the ?le of this Pate“t
UNITED STATES PATENTS
2,286,105
Quinn _______________ __ June 9, 1942
7320 780
I
ments on said hanger member When said cylindrical
2’558’695
UPger """""""""""" '7 Jung 26’ 1951
lower portions of said support elements are received
in said part-cylindrical passage portions,
2,771,308
Vltcha -------------- " Nov‘ 20’ 1956
2,830,665
Bums --------------- -~ Apr- 15’ 1958
versely of said passage to support said support ele-
60
7’
’
‘at least one of said support elements having a maximum diameter smaller than said central passage 65
portion so as to be capable of being passed dOWnwardly through said central passage portion, to en-
. 0
ennm°s ''''''''''' "
J
um
1
’
1943
FOREIGN PATENTS
10,174
772,158
Great Britain ————————— -- Iuly 16’ 1914
Great Britain _________ __ Apr. 10, 1957
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