close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3091304

код для вставки
May 28, 1963
3,091,294
G. W. EVANS ETAL
PLUG FOR WELL FLOW CONDUCTORS
Filed Nov. 9, 1960
i
M
w
\l\\ \
35-. /y
f
/
1 //4
\\\\\
% \\\
\\
\
‘53-2;
INVENTORS
Jo h n R. L0 n d
Giqrge W. Evans
BY
£1
2
ATTORNEYS
United States Patent
' 3,091,294
"
7 Patented May 2’8, 1963
1
A further Qhi'ect'i's to provide a stop or seat insert and
; plugrrforgajt?’owconductor wherein the stop or seat insert
may be'molunted ata collar recess of the flow conductor
3,091,294
PLUG FOR WELL FLOW CONDUCTORS
George W. Evans and John R. Land, Duncan, Okla” as
signors to Halliburton Company, Duncan, Okla” a cor
poration of Delaware
Filed Nov. 9, 1960, Ser. No. 68,271
11 Claims. (Cl. 166-193)
between adjacent ends of adjacent tubing sections with
01 out regard'to twillichyend of the insert is in upper or lower
position iii theitub'rng and a plug which may be intro
duced: intothe tubing Without regard to which end of
the plug is in upper or lower position in the tubing; and
further’ provided with seal means which close off ?ow
of ?uidsthrcugh the bore of the ?ow conductor in either
This invention relates to well tools and more particu
larly to a plug for closing the flow passage of a well
How conductor, such as well tubing or well casing.
In various operations of a well, such as well cementing,
it is desirable to close the flow passage of a ?rowrcon~
ductor, such as tubing, at a desired position in therwelli
dirnQtiOZlt
Additional objects and advantages of the invention
will be’ readily apparent from the reading of the follow
ing description of a device constructed in accordance
with the invention, and reference to the accompanying
tubing by a plug which may be pumped’ downwardly
through the ?ow passage to the desired position atrwhich
drawiugseth'ereof, wherein:
FIGURE Lisa'fragmentary vertical sectional view
a stop means ‘for arresting downward movement of’ the
plug through the tubing is located. It is often desirable '
0ft dwell tubing provided with a stop or seat insert at a
vide a new and improved plug for closing the ?ow pas-r
ptug‘appears moving down through the tubing ‘to the
sage of a well conductor such as well tubing.
stennrseatinserty '
coupling ‘recess between two adjacent sections of the
that such plug close the flow passage against ?uid new
20 tubing string and showing a plug embodying the inven
in either direction therethrough.
tion: insthe tubing above the stop or'seat insert as said
Accordingly, it is one object of this invention to pro‘:
7 7 V t
to
FIGURE} is Zanenlargedvertical sectional view show
iugsthrééplugitofe FLGURE l latched in position in the
Another object is to provide a plug which'rnay be
pumped downwardly through the ?ow passage’ off the
?ow conductor to a predetermined position inihe well '
tubing where its further downward movement is arrested
by a stop member or seat positioned at the’ coupling
recess between adjacent sections of the tubing,’ } V
'
FIGURE 4Vis'a vertical sectional view similar to FIG
Still another object is to provide a plug which has
URE 2 vslitoittitleg modi?ed forms of the stop or seat insert
means engageable with the stop or seat insert in the tub
'and the. plug. '
ing to prevent movement of the plug from the predeter
mined position in the tubing once it has located at such
predetermined position.
a
V
7
V
stop
insert'and in sealing engagement with the
tubingsections above and below the insert;
FIGUREGVVis'a horizontal cross-sectional view taken
ongthe line 3-3 of FIGURE 2; and,
‘Referring nowparticularly to FIGURES 1, 2 and 3
V
A further object is to provide a plug engageable with
a stop or seat insert positioned at the coupling 'Vrecesst
between two adjacent sections of a tubing and: having
of the drawing, the plug 10 embodying the invention is
employed toscloseethe bore or ?ow passage of a tubing
string T.
annular stop or seat insert 12 is mounted
in the tubing stringlat the, coupling or collar recess 13
formed sbetwéenithe upper and lower ends of the tubing
sealing means for engaging the internal wall surfaces of
both sections of the tubing to close the tubing above and’ 0 SQQfl??Q?W-?l’ldiii rigidly connected together by a collar
16; whichjreoess may be any desired one of the many
below the stop or seat__insert whereby such stop or seat
recesses uniformed in a string of tubing. The seat insert
insert need not be pro ided with any means for sealing
12 has a reduced upper portion which provides an up—
7
Wardly facing external annular shoulder .17 engageable
A still further object is to provide a plug for a well’
conductor having a mandrel provided with a stop shoul 45 withsthe lower end '18 of the upper tubing section 14 to
limit upward movement of the insert in the tubing, down
der engageable with an upwardly facing shoulder of a’
with the tubing‘
stop or seat insert in the well conductor to arrest down
wardtr‘rovement of the insert being prevented by the en
ward movement of the plug through the well conductor,
t gagem'enl oflt'he lower annular end 19 of the insert with
a latch means for engaging a downwardly; facing shoul
der of the seat insert to limit upward movement of'the
the upper 'end' 20 of the lower tubing section 15.
reduced‘ upper portion 22 of the seat insert telescopes
mandrel from the seat insert and seal means mounted on
opposite ends of the mandrel for engaging the internal
wall surfaces of the well conductor above and below the
into; the :loweiend of the upper tubing section, and has
an internal downwardly and inwardly beveled upper stop
The
shoulder {or seat-24. The bore of the annular seat insert
is‘ enlaigedat its lower portion to provide a downwardly
Another object is to provide a plug of the type de 55 ofiérilng'hnnular recess 25 with an annular downwardly
scribed having latch means which function to prevent’
facing lock shoulder 26 defining the upper end of the
seat insert.
movement of the plug from the stop or seat insert re
re
st
,
.
s
t
gardless of which end of the plug is in lower position in 1 I; Thei'plug' 1B- includes a mandrel 30 having its upper
the ?ow conductor, and regardless of which endtof'the:
reduced threaded end portion 31 received in the threaded
plug is subjected to pressure or to a pressure differential. 60 bore 324 of a core 33 of an’ upper seal member assembly
Still another object is to provide a plug wherein the’
351;. The seal’ assembly includes a resilient bulbous seal
mandrel is provided with a pair of spaced latch or snap
element 35, which may be molded about the core 33,
rings, one engaging the stop or seat insert to prevent rup
7 havinggan annular inwardly extending lip 37 covering the
ward movement of the plug from the insert when one
end of the plug is ?rst introduce-d downwardly into things larger endoi the core and’ disposed between the annular
upwardly facing shoulder 77-32 of the mandrel and the
tubing and the other latch ring being cn-gagéjible'swith"
downwardly'facing shoulder 40 of the core to help pre
the seat insert to prevent upward removal of the plug
from the seat insert when the other end of the plug is "vent'sepa'ratiibulofithe seal element 35 from the core.
The 'mairimniiidiazrieter of the bulbous seal element in
?rst introduced downwardly to the tubing, whereby it is'
assured that the plug will be latched at the stop or seat 70 its undeformedi condition is’ greater than the internal
diameter oi the tubing, so that the resilient sealing ele~
insert regardless of which ‘position the plug is’ inserted
ment
is compressed and deformed when inserted into the
in the tubing.
3,091,294
3
tubing by its engagement with the internal surfaces of
the tubing.
The lower reduced threaded end portion 42 of the
mandrel 30 is received in the threaded bore 43 of the
core 44 embedded in the seal element 46 of the lower
seal assembly 47, corresponding otherwise in all respects
to the upper seal assembly 34.
The seal element 46 is
also formed of a ‘resilient substance and has an internal
annular lip 48 disposed between the downwardly facing
4
shoulder 24 of the seat insert. The bulbous seal element
35 of the upper seal assembly 34 of the plug now sealing
ly engages the internal surfaces of the upper tubing sec
tion above the seat insert and the seal element 46 of the
lower seal assembly of the plug 10 now sealingly engages
the internal surfaces of the lower tubing section.
The latch ring 67 is also in registry with and moves
outwardly into the latch recess 25 of the seat insert
when such ring is moved downwardly below the down
shoulder 49 of the external annular ?ange 50 of the man 10 wardly facing lock shoulder 26, so that any upward
drel and the upwardly facing shoulder 51 of the core 44
movement of the plug is arrested by the engagement of
to help prevent separation of the plug from the core.
the upper lock surface 68 of the snap ring with the down~
A latch sleeve 60 is disposed about and con?ned on
wardly facing annular lock shoulder 26 of the seat in
the mandrel 30, its downward movement on the mandrel
sert. As a result, the plug 10 is latched in position in
being limited by the engagement of its lower end with 15 the tubing against longitudinal movement in either direc
the upwardly facing annular shoulder 61 of the ?ange 50
tion, downward movement being prevented by the en
of the mandrel and its upward movement on the mandrel
gagement of the shoulder 64 of the sleeve of the plug
being limited by the engagement of its upper end with
and the shoulder 24 of the seat insert, and upward move
the lower end of the upper seal assembly 34. The upper
ment being arrested by the engagement of the upper lock
end of the latch sleeve has an external annular ?ange 63
surface of the snap latch ring with the downwardly fac
which provides a downwardly and inwardly beveled stop
ing lock shoulder 26 of the seat insert. The longitudinal
shoulder 64 engageable with the upwardly facing stop
dimension of the latch ring is smaller than that of the
shoulder 24 of the valve insert to arrest downward move
recess 25 of the seat insert in order to insure that the
ment of the mandrel through the valve insert. The latch
latch snap ring will be located below the latch shoulder
sleeve is also formed with a downwardly opening external
26 of the seat insert even if some foreign matter, such as
annular recess ‘66 in which is disposed a split resilient
sand or trash, is caught between the shoulder ‘64 of the
latch or snap ring 67 and a split spring 69 which biases
sleeve and the shoulder 24 of the seat insert.
the latch ring outwardly of the recess 66 of the sleeve.
The seal elements 35 and 46 deform as greater ?uid
The latch ring has a downwardly facing beveled shoul
pressure is applied thereto, so that the seal between the
der 70 which cams the latch ring inwardly into the recess 30 plug and the tubing sections above and below the seat
66 of the sleeve upon its engagement with such upward
insert is rendered more effective as the ?uid pressures
ly facing obstructions as the shoulder 24 of the seat in
increase in the tubing above or below the plug.
sert during downward movement of the plug through the
Since the ‘plug has seal elements which sealingly en
tubing string. The upper annular surface of the latch
gage the adjacent upper and lower tubing sections 14
ring is substantially planar and provides a lock shoulder
and 15 on opposite side of the seat insert, the bulbous
68 on said ring which is adapted to engage the down
seal
element 35 of the upper seal assembly deforms and
wardly facing lock shoulder 26 of the stop or seat insert
prevents downward ?ow of ?uid past the plug, and the
12 to lock the plug against upward movement in the tub
bulbous seal element 46 of the lower sealing assembly
ing when the latch ring is disposed in the recess 25, as
40 deforms to prevent upward ?ow of ?uid past the plug.
will be hereafter more fully explained.
As a result, no sealing means are necessary between the
The upper seal element may be provided with some
stop or seat insert and the tubing sections or ‘between the
identifying characteristic such as the external annular
insert and the plug.
?ange 72 to distinguish it from the lower seal element
so that the upper and lower ends of the plug may be
readily distinguished.
In use, when it is desired to close the ?ow passage of
the tubing string T at the point where the stop or seat
insert 12 is located, the plug 10 is inserted into the upper
end of the tubing T with the lower seal assembly 47 dis
posed below the upper seal assembly 34. The bulbous 50
seal elements 35 and 46 are compressed and deformed as
they are inserted into the tubing string since their maxi
mum external diameter, when in an undeformed condi~
It will now be seen that a new and improved plug for
closing the ?ow passage of a ?ow conductor, such as the
tubing T has been illustrated and described, which plug
may be moved to a predetermined location in the ?ow
passage of the tubing string to be latched thereat against
longitudinal movement in either direction from such
predetermined position.
It will also be seen that the plug includes a downwardly
facing stop shoulder or stop means 64 for engaging a
stop or seat insert provided at the desired location in the
tubing string to stop downward movement of the plug
tion, is greater than the internal diameter of the tubing
string. As a result, the sealing elements engage the in 55 at such desired location, and has latch means, such as
the snap ring 67, for engaging a downwardly facing lock
ternal wall surfaces of the tubing string in sealing rela
or latch shoulder 26 in the bore of the seat insert to
tion thereto. Fluid under pressure is then pumped into
prevent upward movement of the plug from the desired
the tubing string above the plug to force the plug down
position.
wardly through the tubing.
It will further be seen that the plug is provided with
As the plug 10 reaches the stop or seat insert 12, the 60
seal means, for sealing with the internal surfaces of the
seal element 46 ?rst engages the downwardly and inward
?ow conductor above and below the seat insert, which
ly beveled shoulder 24, is further compressed and de
are deformable into increased sealing engagement by
formed by its engagement with this shoulder, and passes
increased ?uid pressures either ‘above or below, or both,
downwardly through the seat insert to expand again be
low the seat insertion into sealing engagement with the 65 whereby the plug seals against ?ow of ?uids in either
direction past the plug.
internal surfaces of the lower tubing section 15. Down
In FIGURE 4 is illustrated a modi?ed form of the
ward movement of the plug continues due to the ?uid
plug embodying the invention and a modi?ed form of
pressure above the plug and causes the snap latch ring
the seat insert, which are longitudinally symmetrical so
to move inwardly into the recess 66 of the latch sleeve
of the plug as the beveled shoulder 70 of the snap ring 70 that the insert may be mounted in the tubing, and the
plug may be inserted into the tubing without regard for
engages the beveled stop shoulder 24 of the seat insert
and thus permits further downward movement of the
whichever ends of the elements are in upper or lower
plug through the seat insert. Downward movement of
positions. The modi?ed plug 100 includes an elongate
the plug is arrested when the downwardly facing stop
mandrel 101 whose opposite ends are threadedly re
shoulder 64 of the sleeve engages the beveled upper stop 75 ceived in the threaded bores 102 of the cores 103 of the
8,091,29k
upper and lower seal assemblies 105. and7106, respec
tively. The upper and lower seal assemblies are identical
in construction and have resilient bulbou'sfseal' elements
108 in which the cores are embedded. Each or the in
wardly extending ?anges or lips @109 of the bulbous seal
elements extends inwardly between the shoulder‘ 112 of
its core and the outer annular shoulder ~11?: of an adja
cent retainer ring 111 con?ned on the mandrel 101 be
tween said seal elements and a central sleeve 110. The
in either direction and thus latch the plug to the stop or
seat insert. V'The sealing elements 108 also sealingly en
gage the internal surfaces of the two tubing sections on
opposite sig'esofthe seat insert to prevent flow of fluid
througlritlie' tubing string in either direction, in the same
manner as‘ the sealing assemblies of the form ?rst de
scribed'i; 4
It'w‘sll'be apparent that the plug 100 may be used with
a tubing string having the seat insert 12 as well as with
tubing string having the seat insert 125. The seat in
sleeve 110 is provided adjacent its opposite ends with the' 10 asert
15253 being'iongitudinally symmetrical, may be posi
annular recesses 114 in which latch or'snap lock rings
116 are resiliently mounted and biased outwardly by the.
split springs 117. The latch or lock’ rings extend out
tioned with either end upward whereas the seat insert 12
must lbe positioned with the lock shoulder 26 thereof in
a'downwardly facing position. It will be apparent that
wardly of the recesses 114 for a purpose 'to’ be herein
this‘latter
construction prevents a careless operator from
15
after more fully explained; The latch rings, ?rst de
positioning the seat insert 12 with the shoulder 24 facing
scribed, which are identical in constructionwith the
downwa?iyfandthat by use thereof the plugs 10 or 100
snap ring 67, have annular cam shoulders 1270' and
may be properly positioned and latched in the tubing
opposed inwardly facing lock shoulders 118 correspond;
string at the desired position at either ofsuch seat inserts.
ing to the lock shoulder 68 of the form ?rstv described.
Sin'riiar-lyfit
will be seen that while the plug 19 must be
The sleeve 110 is provided intermediate its
with 20' introduced into the upper end of the tubing string with
an annular external ?ange 121 which provides the out"
the sealing assembly 47 in a lower position, since the plug
roots longitudinally symmetrical and is provided with a
pair of snap'rings' which are spaced on opposite sides of
?ange
The 126
stop receivable
or seat insert
in the125
recess
has fort?e'tfit
an externalthe collar
the shoulders 131 of the external ?ange 132 of the sleeve
16 of the tubing string T. The upwardly 'facing’annular 25 of the plug 100,v the plug 100 will latch in place at a seat
shoulder i127 of the ?ange engages the [secrets '18 of
insertil'l or 125 regardless of which of its ends is in lower
the upper tubing section 14 and its down d1 facing
position.
'
annular shoulder 129 engages the uppers
ofth'e'
It willfnow be seen that both forms of the plug are
lower tubing section 15. The opposite externally re
secured to a seat insert at a desired location in a ?ow con
duced ends of the insert are telescoped into the upper and
ductor, such as a well tubing, against longitudinal move
lower tubing sections and have opposed inwardly con
ment therein and that they have sealing means spaced on
vergent beveled stop shoulders 130 and 131'.’ The seat
opposite sides of such seat insert to seal with the tubing
insert is provided with an internal annular latchor lock
to prevent’ flow of ?uid in either direction through the
wardly convergent oppositely facing stop shoulders 122.
ing recess 133 de?ned by longitudinally spaced upwardly 35 tubing 'Sl?flg'}
and downwardly facing lock shoulders 134 and 135, re
'It will further be seen that both plugs are of simple,
spectively.
V
V
economical construction and that the components thereof
In use, when it is desired to close the i‘iow passage of
are easily assembled to form the plug.
the tubing at the point in the tubing at which'the seat
The foregoing description of the invention is explana
insert 125 is located, the plug 100 is introduced into the 40 tory only, andrchanges in the details of the construction
upper end of the tubing and forced downwardly by ?uid
pressure introduced at the upper end ofthe' tubing'there
above. The resilient bulbous seal elements'ltts of the
seal assemblies 105 and 106 are of greater diameter, when
illustrated may be made by those skilled in the art, within
the scope of’the appended claims, without departing from
the spirit of the invention.
What is claimed and desired to be secured by Letters
in normal nondcformed condition, thaniitlte internal di 45 Patenti'sr'
ameter of the tubing so that the seal elements are com
<1. A well tool for closing the ?ow passage of a well ?ow
pressed and deformed, when inserted into the tubing, into
conductor having a pair of longitudinally spaced oppo
sealing engagement with the internal surfaces of the
sitely lacing shoulders, said well tool including: a man
tubing string. When the seal element 108 of whichever
drel, 'seal means on opposite ends of said mandrel ‘for
seal assembly 105 or 106 is in the lower position in the 50 sealingly engaging internal surfaces of said well ?ow con
tubing encounters the inwardly beveled stop shoulder 130
duc’tor; stop means on said mandrel engageable with one
at the upper end of the seat insert 125; the seal element
of said shoulders of said ?ow conductor for limiting move
is compressed to pass through the insert to therpo'sition
ment of said well tool in the ?ow conductor in one direc
illustrated in FIGURE -4, where it is disposed below the
tion and latch means carried by said mandrel and engage
seat insert in sealing contact with the internal surface of
able with the other of said shoulders of said ?ow con
the lower tubing section 15. During Such’ downward a doctor for preventing movement of said well tool in the
movement of the plug through the seat insert, the cam
opposite direction in the flow conductor, said stop means
shoulder 120 of whichever snap ring 116 is in lower" '
said latch means being disposed between said seal
position on the sleeve 110 engages the upper stopshou'lé
means.
der 130 of the seat insert and is ?rst carnmed thereby into 60 ' 2. A well tool for use in a ?ow conductor having a flow
its recess 114 of the sleeve 110 and then expands rout a passage; a seat insert having an upwardly facing inwardly
wardly when the plug moves downwardly a su?icient dis
i?'l‘d downwardly beveled upper shoulder extending into
tance in the stop or seat insert to cause the snap lock ring . thee?ow passage of the ?ow conductor and also having an
to be positioned below the upper lock shoulder 135 inftlgej ' abrupt downwardly ‘Vfscin'g'shoulder' spaced below said
locking recess 133 of the seat insert. At this time which‘. 65 upwardly facing shoulder and an integral external an
ever shoulder ‘122 of the ?ange 121 of the sleeve faces
downwardly then engages the upwardly facing stop shoul
nular ?ange thereon adapted to be positioned between
adjacent isectionsrof said ?ow conductor at a coupling re
der 130 of the stop or seat insert to arrrestnfurther down
eessthereima plug including a mandrel having external
stop means .for engaging said upwardly facing shoulder
ward movement of the plug in the tubing, The ,?ange oi
the sleeve which engages the upper stop shoulder 130 70 to limit downward movement of said plug in said flow
of the insert and the snap ring which. is in
7 conductor, resilient contractible and expansible latch
means carried by said mandrel and normally proiecting
tion in the latch recess 133 of the seat ring'd . sQdj’tQ
laterally therefrom so as to be engageable with said down
engage the upper stop shoulder 135 of
recess in the
wardly‘facing shoulder for limiting upwrad movement
seat insert then prevent movement of the plug longitu
dinally of the tubing with respect to the stop or seat insert 75 of the plug in the ?ow'conductor, and a seal means car
3,091,294
ried by sand mandrel for engaging said ?ow conductor
at a point spaced longitudinally of said conductor from
said insert to prevent ?ow of ?uids through the ?ow
passage of the ?ow conductor in either direction.
3. A well plug including: an elongate mandrel having
,exlternal stop means thereon providing longitudinally
spaced oppositely facing stop shoulders; expansible latch
8
posite sides of said means providing said stop shoulders,
said latch means each being resiliently biased outwardly
of said mandrel to a projecting position, whereby one of
said latch means engages with said lock shoulders of
said inert member when one of said stop shoulders on
said mandrel engages one of the seat shoulders of said
insert member to latch said plug assembly to said insert
means carried by said mandrel and disposed on opposite
member; and seal means carried by said mandrel and
side-s of said stop means; and a pair of seal means carried
spaced longitudinally beyond each of said latch means
by said mandrel adjacent opposite ends thereof and dis 10 and adapted to seal with a well ?ow conductor on op
posed longitudinally outwardly of said latch means.
posite sides of said insert member to prevent ?uid ?ow
4. A well tool including: seat insert means connectible
in either direction past said plug assembly.
in a well ?ow conductor and providing longitudinally
8. A well tool including: an annular ring insert having
spaced oppositely facing seat and lock shoulders; a plug
an external annular ?ange thereon adapted to be en
member insertable through said Well conductor and hav 15 gaged between the ends of adjacent sections of a well
ing means thereon providing a stop shoulder engageable
?ow conductor, whereby said insert is held in place in
with the seat shoulder of said seat insert means, resilient
said well ?ow conductor against longitudinal movement
compressible and expansible latch means on said plug
therein, means on said insert ring providing a seat shoulder
member inherently biased outwardly of said plug mem
projecting into the bore of said well ?ow conductor and
ber to a projecting position engageable with said lock
a stop shoulder spaced longitudinally from and facing
shoulder of said seat insert means, and seal means on said
in the opposite direction to said seat shoulder; and a plug
plug member engageable with said ?ow conductor to pre
assembly comprising a mandrel; external annular ?ange
vent ?ow of ?uids through the conductor in either direc
means on said mandrel engageable with said seat shoul
tion when said plug member is engaged with the said stop
der of said ring insert to limit movement of said plug
and lock shoulders of said seat insert means.
25 assembly in one direction in ‘a well conductor with re
5. A well tool for closing the ?ow passage of a well
spect to said ring insert; latch ring means on said mandrel
?ow conductor and comprising: insert means connectible
in said well ?ow conductor and providing a projecting seat
shoulder and a longitudinally spaced oppositely facing
lock shoulder projecting into the bore of said ?ow con
ductor; and a plug assembly comprising a mandrel, stop
and resiliently biased outwardly thereof to a position pro
jecting from said mandrel disposed to engage said stop
shoulder of said ring insert to limit movement of said
plug assembly longitudinally in the opposite direction
with respect to said ring insert; and a pair of longi
means on said mandrel engageable with said seat shoul
tudinally spaced bulbous seal members carried on opposite
der for limiting movement of said plug assembly in said
ends of said mandrel assembly and disposed to engage said
flow conductor in one direction, resilient contractible and
well ?ow conductor to prevent ?ow of ?uids therepast
expansible latch means on said ‘mandrel normally inher 35 in either direction, said seal members engaging said well
ently biased to a projecting position engageable with said
?ow conductor on opposite sides of said ring insert when
lock shoulder for preventing movement of said plug as
said plug assembly is in engagement with said ring insert.
sembly in the opposite direction in said ?ow conductor,
9. A well tool including: an annular seat and lock
and a pair of seal means on said mandrel adjacent the
insert ring member adapted to be positioned in a well ?ow
opposite ends thereof for sealingly engaging the internal 40 conductor, said ring member having an external annular
surfaces of said well ?ow conductor on opposite sides of
?ange thereon adapted to be disposed between the ad
said insert means to shut off ?ow of ?uids through the
jacent ends of adjacent sections of a well ?ow conductor
?ow passage of the conductor.
and con?ned therebetween, whereby said seat and lock
6. A well tool for use in a string of connected sections
ring insert is held against longitudinal movement in said
of well ?ow conductor, said tool including: a seat and 45 well ?ow conductor, said insert ring having opposed longi
lock insert member adapted to be connected in said well
tudinally spaced annular seat shoulders thereon projecting
?ow conductor, said member having an integral external
annular ?ange disposed to be con?ned between adjacent
into said well ?ow conductor, said insert ring also having
a recess formed in its bore intermediate the seat shoulders
sections of said well ?ow conductor, whereby said mem
thereof and providing a pair of longitudinally spaced
ber is positively positioned in said well ?ow conductor 50 oppositely facing lock shoulders in said bore of said con
against movement in either direction therein and having
ductor of said insert ring; and ‘a plug assembly comprising
a seat shoulder and an oppositely facing lock shoulder; a
a mandrel, external ?ange means on said mandrel pro
plug assembly insertable in said well ?ow conductor and
viding a pair of oppositely facing stop shoulders disposed
comprising a mandrel, stop means on said mandrel en
in the central portion of said mandrel and adapted to en
gageable with the seat shoulder of said insert member 55 gage one of said seat shoulders of said insert ring to
‘for preventing movement of said plug assembly in one
limit movement of said plug assembly longitudinally
direction past said insert member, resilient substantially
annular contractible and expansible latch means mounted
through said insert ring, a pair of longitudinally spaced
latch ring means disposed on said mandrel on longitudi
on said mandrel and resiliently movable outwardly there
nally opposite sides of said external annular ?ange means
of into position to engage said lock shoulder of said in 60 and resiliently biased outwardly of said mandrel, each
sert member to prevent movement of said plug assembly
of said latch ring means being adapted for engagement
in the opposite direction with respect to said insert mem
in the recess in said insert ring for locking engagement
ber; and a pair of longitudinally spaced seal means carried
with one of the lock shoulders in said recess to prevent
by said mandrel engageable with the ?ow conductor on
longitudinal movement of said mandrel in the opposite
opposite sides of said insert member to prevent ?ow of 65 direction with respect to said insert ring when the adja
?uids past said plug assembly.
cent stop shoulder is engaged with one of said seat shoul
7. A well tool including: an annular lock and seat in
ders, and a pair of bulbous seal members on the opposite
sert member having means for mounting it in a well ?ow
ends of said mandrel and disposed to engage in sealing
conductor and having oppositely facing longitudinally
relation the well ?ow conductor to seal oil flow of ?uids
spaced seat shoulders thereon and a pair of oppositely 70 therepast, said seal members being disposed on opposite
facing internal annular latech shoulders in its bore inter
mediate the oppositely facing seat shoulders; and a plug
assembly comprising a mandrel; means pro-viding op
positely facing stop shoulders on said mandrel; a pair
of. spaced latch means disposed on longitudinally op 75
sides of said insert ring when said plug assembly is in
seating and latching engagement with said insert ring.
10. A seat insert for a well ?ow conductor having
longitudinally aligned sections connected in spaced re
lationship to one another by a connecting means, said
3,091,294
seat insert including: an annular member having an out
10
wardly extending integral external annular ?ange portion
wardly integral external annular ?ange portion receivable
receivable between adjacent ends of adjacent sections of
between adiacent ends of adjacent sections of a well ?ow
conductor whereby said seat insert may be secured’ to
said well ?ow conductor against longitudinal movement
relative thereto, said annular member having an inner
secured to said well ?ow conductor against longitudinal
movemenfreiafive thereto, said annular member having
portion extending inwardly of said tubing sections pro
viding oppositely facing stop and latch shoulders, said
stop shoulder being beveled inwardly and longitudinaily
stop shoulders at opposite ends thereof, said annular por
tion having an internal annular recess de?ned by longi
a well ?ow conductor whereby said seat insert may be
an annnlaruportion extending inwardly of said tubing sec
tions
,liaving inwardly convergent oppositely facing
tudinally spaced parallel annular lock shoulders extending
toward said latch shoulder and said latch shoulder ex 10 at a right angle to the longitudinal axis of the bore of
tending substantially normal to the longitudinal axis of
said annular member.
the bore of said annular member, said stop and latch
shoulders of said annular member being engageable with
References Cited in the tile of this patent
stop and latch means respectively of a plug for limiting
longitudinal movement of the plug relative to the seat 15
UNITED STATES PATENTS
insert.
2,394,977
Boynton ______________ _- Feb. 19, 1946
11. A seat insert for a well ?ow conductor having
longitudinally aligned sections. connected in spaced re
lationship to one another by a connecting means, said
seat insert including: an annular member having an out 20
2,436,525
2,506,680
O’Donnell ____________ __ Feb. 24, 1948
Otis __________________ .._ May 9, 1950
Документ
Категория
Без категории
Просмотров
0
Размер файла
961 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа