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Патент USA US2404692

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July 23» l946» ì
wfL. CHURCH
29,404,692
PACKER ANCHOR
Filed April .22.` 1943
2 Sheets-Sheet 1
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INVENToR.
July 23„ E46.
w. L. CHURCH
¿4049592
PAGKER ANcHoR
Filed April 2.2„ 1943
2 Sheets-Sheet 2
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2,404,692
Patented July 23, ‘1946
UNITED STATES PATENT orrlclsfv
V Walter L. Church, Houston, Tex.
Application April 22, 1943, Serial No. 484,105
7 Claims.
n
,
(Cl. ISG-,12)
>1
Figure 7 shows a cross-sectional view taken‘on
This invention relates to a packer for wells and
has particularV relation to an expansible packer
designed for forming a seal between the well tub
the line ‘I-'I of Figure 6.
ing and an outer well pipeï or casing, with means
ignates the well tubing which extends tothe
`
_
`
` '
-
Referring to the drawings the numeral I des
for anchoring the packer against upward move- 5 ground surface and the Vnumeral 2 designates the
outer well pipe, or casing which also extends to
ment in the well casing.
the ground surface.- Onthe tubingthere‘js‘ a
Another object is to provide aV packer assem
tubular cage 3 having an inside downwardly
bly so connected to the ¿tubing that the tubing
tapering seat il at its lower end whereon there is
may be readily detached and withdrawn.
In completing a well a packer is set between 10 mounted an expansible downwardly tapering slip
the tubing and'casing. It is sometimes set be- ` 5. This slip has, on the inside, upwardly pitched,
right-hand teeth‘or threads 6` and screwed onto
Ytween two producing strata and production from
the lower end `of >the tubing I there is _a cou
the lower stratum is carried to the ground sur
faceV through the tubing'while production from
pling 'I whose upper end has external'downward
the upper stratum is carried to the ground sur- 15 ly pitched right hand threads 8 engageable with
the teeth of the said slip. Mounted in the‘cage
face through the casing. The packer should be
3 are the friction members `9 `which are retained
anchored against upward movement or down
ward movement as otherwise it might be moved
in the one direc-tion or the other on account oi
against' detachment by the-endfstops Ill, I0 and
which are held yieldingly in` their outer position
unequal pressures on opposite sides of it. If the 20 by the pressure springs Iüa so‘that they will
be held in frictional contact with the well casing
2 as rshown in Figures 1 to 6. Thesprings Illa
ment and the well pressureïbeneath it exceeds
are seated ina bushing 3a driven into -the cage
that above' it, it is liable to be moved upwardly
3. When the tubing is turned to the right the
with sufficient force to bend or “corkscrew”Í the
tubing so that the tubing will be injured or ren- 25 threads 8 will b_e disengaged from the threads 6
and the tubing ‘can be moved downwardly. In or
dered completely worthless for further use when
der to yreëengagesaid threads the tubing may be
withdrawn. It is an object of the present inven
given a straight pull upwardly and the threads 8 '
tion to provide means for securely’` anchoring»
will ratchet past the threads 6 and reengage
the packer against movement in either direction
packer vis not anchored againstA upward move- ‘ '
therewith, the slip '5 being made expansible to
when it is once set in a well.
The invention herein disclosed embodies also
novel means for setting and anchoring the packer
which constitutes an improvement over that type
of assembly disclosed in my application, ñled De
permutms.
‘
`
‘
.
\
‘
The coupling 'I and the opposing end of cage
3 have interengaging stopsII and I2 respective
ly t'o `prevent lthe threads 8 from becoming too
cember 2, 1940; under Serial Number 368,127, 35 tightly screwed into the threads 6 upon a rela
tive reverse rotation of these-parts.
which issued on February 27, 1944, under Patent
Mounted for radial movement in the cage 3
I
»
there are casing engaging jaws I3 whose inner
With the above and other objects in View the
sides converge downwardly and. whose outer sides
invention has particular relation to certain novel
features of construction, operation and arrange- 40 are formed withl downwardly pitched teeth.
These jaws are normally maintained in their in
ment of parts, an example of which is given in
ner position out of engagement with the casing
this specification and illustrated in the accom
by the iiat springs I4 whose-lower ends are fas
panying drawings, wherein: .
tened to the cage and whose upper ends: are free
Figure 1 shows an elevational view of the corn
plete assembly " showing the packer expanded, 45 and located in vertical outside grooves in the
jaws. ‘The upper ends of the jaws are limited
lntheir outward movement by the stops I5 on
Figures 2 and A3 show side views, partly in
the cage at the upper ends of the jaWS
section, of the upper and lower. ends ofthe as
There is a downwardly tapering jaw expander
sembly showing the packer collapsed. I
Figure 4 shows a cross-sectional view taken on 50 I6 within the jaws I3 andthe upper end of the
cage 3 extends above the said jaws and has an
'the line 4-4 of Figure 3.
'
inside Vkey I1 engageable With an external’shoul
Figures 5 and 6 show side _Views partly .in sec
No. 2,352,433. ‘
or set.
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_
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`der I8 on said expander to prevent detachment
tion, of the upper and lower ends respectively, of
the` assembly showing _the packer expanded or
set. and '
f
n
of the cage from the expander.
P?
Screwthreaded onto the upper end of the jaw
4
expander | 6 is a sleeve |9 and screwthreaded into
the tubing I, its weight will cause the pin 30 to
the upper end of the sleeve is an annular abut
be sheared and the jaws 26 will be expanded into
engagement lwith the casing 2 and the packer
ment 20.
Slidably mounted within .this abutment and
extending above it is a tubular packer support
2| whose lower end has an outside annular shoul
der 22 underneath and engageable with the lower
end of the abutment 29 andwhose upper end is
screwthreaded into a set collar 24, above. Sur->
will be thus maintained expanded and also an
chored against upward movement in case high
pressure should develop beneath the packer.
Depending from the coupling -| there is an ex
tension tube la which forms, in eiiecta con
tinuation~ of the tubing |. and which` may extend
rounding the packer support is a suitable sleeve
like expansible packer 23, which is formed of
any selected distance down into the well.'v >The tubing | is provided with a plurality of _
rubber or other suitable expansible material so
slots 36 which ‘will be located beneath the stuff
`,ing box 34 ywhen the packer is set and _produc->
as to form, when expanded, a fluid tight yseal
with the outer well pipe or casing 2. The packer,
at its lower and upper ends, is iitted into the Vad
jacent ends of the annular abutment 20 ¿and set
collar 24 respectively as shown in Figures 2 and 3.
tion is being carried on through the tubing, as
shown in'Figure 5 but which will be located above
said stuñ‘lng box, as shown in Figure 2 when the
assembly is being moved in the well. It isV to
An upper tubular cage 25 has its lower end.'
i
be Aunderstood that theiwell is filled 4with ñuid
and while lowering or withdrawing or adjusting
screwthreaded onto the 1upper end of the set col
lar. _ Mounted for `radial movementin the upper 20 the assembly in the well,_ît is desirable that cir
end portion of the cage _25 are casing engaging
culation be maintained from >withi'nfthe tubing
jaws 26 whose inner sides _are inclined _down
wardly and inwardly end_whose outer sides are
formed withupwardly pitched teeth. A_'_I‘hese jaws
to the >outside ofthe tubingand vicerso;
i’ ' '
the pressure will be' equalized thus relieving" the
packer assembly from ua 'major portion of.. the
-are normallyheld,V in their inner yposition by the 25 weight of the liquidv column above duringithese
ñat__springs_ _2_1 __whpse lower ends are fastened
movements. This circulation may be maintained
toA the cage 2_5 and whoseupper ends are free
and fil?, inl Vertical slots inthe jaws 2¿6,_ 'I_‘l’ieup
through the ,slotsâû andthe surrcundingfholes
3l, through the cage 25, when the assembly wislfin
per endsof the jaws areJ limited in Vtheir out- _ - the position shown in Figure 2.
_
¿La
ward movement by _stops 28 on _thecage 275,; _ __
With the packer set, Vas showniii_lîfigurjg,_v1,`~ pro
e. Within the jaws 26 there is__an expander 29
duction maybe carried on- through theV tubingll
whosed outer surface; tapers downwardly. This
expander is initially fastenedtotheupper end çf
the
V.On
cage_2_5
the tubing
by agshearable
I above pin
_the39.
expanderuzâi~_ _ _
there
is anenlarged coupling Y3| and onthe _tubing |
beneath the expander 29 andspaced the required
to theground surface,
_
_
__¿
` 2 maybe provided with perforations ¿38;‘above
the 4packer and opposite a lproducing stratum’sç'
that gas or oil may be also producedand delivered
to the ground surface up through the . casing
around the tubing.
i
.
__
_
_
`g
¿ i
When it is desired todo so the assembly, un
,
_ Clamped in an internal recess in the _get collar
_
¿_
55
der .normal conditions, may be removed fromthe
well. In order to do _this .the tubing may be pulled
upwardly thus pullingthe :upperend ofthe cou-`
pling ‘l up into the slip 5, the, threads B_»oi the
coupling ratcheting pastvthe‘threads 6 of the islip
so that said threads maybe inter-_'engagedby af
direct upward movement ofr the tubing._ >_Upon
such Yupward movement the coupling v3.2 willen
g'age the lower end of, and elevate, the expander
29 and the springs 2`| will >release the> jaws 26
24 by the gland 33 is a stuiiing box 3_4 which
closely surrounds the tubing _|_,
_
A
distance beneath the coupling 3| there is an en
larged oo1lar32. _
__
As illustrated in Figures 1J and 5l the V.casing
‘_ _
Thereis >a release sleeve 35 positioned within
packer. support. 2| and _spaced therefrom and
whose upper end isscrewthreaded into Dthe set
collar 24. The release sleeve ,closely surrounds
the tubing .l and _extendsidownwardly through
the sleeves _2| and|9_ and‘on down through the
lower
In use
cage
the3 apparatus
and bushing
is assembled
3a therein.as__ 4s_lfro-wnin
from the casingì. At,` the Sametime the ¿upper
end of the coupling '| will engage the'lower end
ofthe .sleeve 35 forcing it Vand thesetpollar -24
the expander 29 pinned to the upper end of__cage
upwardly which will cause an upwardq movement
25. -While being so lowered the expander `|6 will _- . of the packer support 2|.v The external4 shoulder
Figures 2 and 3 with the upper end `pf thecou
pling 'I_.engaged and held by the slip 5; and with
be held in itsupper position by _the _sleeve _35
22 of this support will _engage the lower end of. Y
whose lower end> rests on the upper end of the
the abutment 29 thus elevating said abutment
coupling l as shown in Figure 3 and the packer
23 will be collapsed. When the selected lßvel has
been reached to _set ythe packer the tubing may i.
be turned tothe right. UThe ycage _3 will vbe held
stationary by the friction members 9 and the cou
pling 'l will be screwed out of the slip 5. There
upon the tubing may be lowered andthe coupling
co
and the sleeve i9 and expander |6> to release
the jaws | 3 and the. springs |4 will then disen
gage Vsaid jaws from th’e casing 2 and the _entire
assembly may be pulled from the well.
.
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_ l ;
It sometimes happens that ith'e packer assem
bly becomes stuck and cannot 'be released. >In
3|` will land on the expander 29 causing the cage .' such case the tubing I'may be "unscrewedand
25 v¿and Aset collar 24 to move downwardly thus 65 parted at the coupling 3|. ForV this purpose this
forcing the sleeve |9 and the expander I5 down
wardly and the jaws I3 will be expanded, >or
moved outwardly into engagement with the cas
ing `2 thus anchoring the assembly against fur
ther downward movement, as a whole.
As the 70
tubing fis moved further downwardly the cage 25
¿and _set collar will also be moved vdownwardly to
cause the expansion of the pacl§ver23> into seal
ing relationship with the casingl 2
shown» in
Figure l. Upon'further downward movement of
coupling 3| may bevof the safety `ioint type oïfiany
conventional construction'to facilitate the' part
lng of me tubing so that the'tubingmay be with;
drawnandsaved.'
_
"
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f
>j
if
`
The upper end of 'the jaoret,~forre1easesleeve,
35 is provided with a verticallyìelöngated‘slot ‘39
and a key .40 is 4a’tt'a_.o_l_1ed to the tubing andiworks
in said‘fslot‘whereby the tubing Aandfrel’e‘as’e’sleeve Y
are caused >to -rotate together but are ‘allowedjja
limited, relative, longitudinal movement. "
2,404,692V
`
What Í claim is:
‘
»
" 1. A device for forming a seal between an in
ner tubing and the walls of the well, and which
includes an expansible sleeve-like packer with
means beneath the packer for supporting the
packer; a tubular upper cage above the packer
around the inner tubing, radially movable wall
.engaging slips mounted in the cage, a downwardly
tapering expander, -a shearable pin securing the
expander in the cage above the slips, an external
projection on the tubing above the expander and
engageable with the expander to move the cage
downwardly Vto subject the packer to endwise com
pressive force to expand the packer, said pin being
thereafter shearable by the weight of the inner
tubing and the expander being thereupon movable
downwardly between said slips to expand the
the cage, a packer support depending from the
set collar, a sleeve-like expansible packer beneath
the set `collar around said support, a sleeve
around said packer support whose upper end
has an abutment against the lower end of, the
packer, a lower downwardly tapering slip-ex
pander carried by the lower end of said sleeve, a
lower vtubular cage, casing engaging slips in said
lower cage around said lower expander, yield
able means normally holding the slips in the
lower' cage retracted,` a coupling on said inner
‘tubing releasably connectedrto the lower cage, a
release sleeve arranged to rest on said coupling
and connected to and supporting the set collar
. while going` into _awell to maintain the packer
collapsed, a coupling on the inner tubing above
theV upper expander arranged to engage the up
per expander and move the upper cage, the set
slips into engagement with the walls of the well
collar„the packer and the lower expander down
to maintain the packer expanded, and an exter
nal projection on the tubing engageable‘with the 20 wardly, upon release on the inner tubing from
the lower cage and the downward movement of
expander upon subsequent upward movement of
the inner tubing, whereby the lower slips will be
the tubing to release the expander from the slips,
expanded by the lower expander and caused to
means for retracting the slips upon such release
engage the casing to support the packer and to
to disengage them from the `walls of the well to
allow the packer to collapse and be withdrawn 25 cause expansion of the packer upon further
downward movement ofthe inner tubing, said
from the well.
,
pin being shearable and said upper expander be
2. A device for packing wells and shaped to
surround an inner tubing and comprising an up
per tubular cage, a downwardly tapering, upper,
ing releasable and downwardly movable by the
weight Kof thel tubing to expand the upper slips
slip expander secured within the cage, casing 30 into engagement with the casing.
4. A device vfor packing wells and shaped to
engaging slips in the cage around the expander,
surround Aan inner tubing and comprising an up
releasable means initially retaining the expander
per tubular cage, a downwardly tapering, up
in inactive position, yieldable means normally re
per, slip expander releasably secured within the
taining said slips retracted or in their inner po
sition, a set collar connected to the lower end 35 cage, casing engaging slips in the cage around
the expander, releasable means initially retain
of the cage, a packer support depending from the
ing the, expander in _inactive position, yieldable
set collar, a sleeve-like expansible packer beneath
means normally retaining said slips retracted or
the set collar around said support, a sleeve around
in their inner position, a set collar connected to
said packer support whose upper end has an abut
ment against the lower end of the packer, a lower 40 the lower end of the cage, a seal within the set
collar adapted to surround said inner tubing, a
downwardly tapering slip-expander carried by
packer support depending from the set collar, a
the lower end of said sleeve, a lower tubular cage,
sleeve-like expansible packer beneath' the set
casing engaging slips in said lower cage around
collar around said support, a sleeve around said
said lower expander, yieldable means normally
packer support >whose upper end has an abut
holding the slips in the lower cage retracted, a
ment against the lower end of the packer, a
coupling on said inner tubing releasably connect
lower downwardly tapering slip-expander car
ed to the lower cage, a coupling on the inner
ried by the lower end of said sleeve, a lower tu
tubing above the upper expander arranged to en
bular cage, casing engaging slips in said lower
gage the upper expander and move the upper
cage, the set collar, the packer and the lower ‘ cage around said lower expander, yieldable means
normally holding the slips in the lower cage re
expander downwardly, upon release of the inner
tracted, a vcoupling on said inner tubing releas
tubing from the lower cage and the downward
ably connected to the lower cage, a collar on
movement of the inner tubing, whereby the lower
said inner tubing engageable with the lower end
slips will be expanded by the lower expander and
of the upper expander upon upward movement
caused to engage the casing to support the packer
of the inner tubing, a coupling on the inner tub
and to cause expansion of the packer upon fur
ing above the upper expander arranged to engage
ther downward movement of the inner tubing,
the upper expander and move the upper cage,
said upper expander being releasable and down
the set collar, the packer and the lower expander
wardly movable by the weight of the tubing to
downwardly,` upon release of the inner- tubing
expand the upper slips into engagement with the
casing, and an external abutment on the inner
tubing engageable with the upper expander, upon
subsequent upward movement of the tubing and
eiîective to release said upper expander from the
upper slips.
3. A device for packing wells and shaped to
surround an inner tubing and comprising an
upper tubular cage, a downwardly tapering, up
per, slip expander within the cage, a shear pin
securing said expander to the cage, casing en 70
gaging slips in the cage around the expander,
said shear pin initially retaining the expander in
from the lower cage and the downward move
ment; of the inner tubing, whereby the lower slips
will be expanded by the lower expander and
caused to engage the casing to support the pack
er and to cause expansion of the packer upon
further downward movement of the inner tubing,
said upper expander being releasable and down
wardly movable by the weight of the tubing to
expand the upper slips into engagement with
the casing.
.
5. A device for packing wells and shaped to
surround an inner tubing and comprising an up
per tubular cage, a downwardly tapering, upper
slip expander secured within the cage, casing en
inactive position, yieldable means normally re
taining said slips retracted or in their inner po
sition, a set collar connected to the lower end of 75 gaging slips in .the cage around the expander, re
7
2,404,692
8
leasable means initially retaining the expander
in inactive position, yieldable means‘normally‘re'
arranged to engage the upper expander and
move the upper cage, the set collar, the packer
and the lower expander downwardly, upon release
of the` inner' tubing from the lower cage and the
taining said >slips retracted or in their inner posi'
tion,'a set collar connected to the lower end of
the cage, a packer support depending Afrom _the
downward movement of the inner tubing, Where
set collar, a sleeve-like expansible 'packer beneath'
the set collar around said support, a sleeve aroundV
said packer support .whose upper end has an
abutment against the lower end of 'the .packerya
lower downwardly tapering slip-expander carried
by the lower slips will be expanded by the lower
expander and caused to engage the casing to
support the packer and to cause expansion of the
packer upon further downward movement of the
10
by the lower end of said sleeve, a lower tubular
cage, means on the lowereage
irrational en- ,
gag‘ement with the well casing’casing' engaging
slips in said lower cageV around said >lower ex
pander, yieldable means normally-holding the
slips in the lower cage retracted, aY coupling on
said inner tubing" relea'sably' connected to the
lower cage, a coupling on the inner tubing Yabove
the upper expander arranged to engage the up
inner tubing, said upper expander being Vreleas
able `and downwardlymovable by theV Weight >of
the tubing to expand the ‘upper slips into engage
ment with the casing; said upwardly facing shoul
der being provided to release the upperexpander
from theeorresponding slipstïoV permit lrelease of
said slips .from the well casing.
l Y `
'7. A device of the character described compris
ing, an upper tubular perforated cage, a down
wardly tapering upper, slip expander within the
per expander and move the upper cage, the set' 20 cage, casing engaging slips in the cage around the
collar», the packer and the lower expander down
wardly, upon release of the inner tubing from
the lower cage and `'the downward movement of
the'inne‘r tubing, whereby the lower-slips will be
expanded by 'the lower expander and' caused rto
engage the casing to support tlflepackerV and to
cause expansion of the packer upon- further'dow'n-r
ward'inovement of the inner tubing, said upper
expander being releasable and’downwardly mov
able by the> weight of theA tubing to expand the*`
upper slips into engagement with the casing and
an externalïprojection on the tubing engageable
with the upper expander to release it from the
upper slips upon subsequent upward movement of Y
the tubing'.
»
6. A device of the 'character described compris'
ing, an upper tubular cage, a downwardly taper
ing upper, slip expander within the cage, easing
engaging slip-s in the cage around the expander,
releasable means initially retaining the expander
in inactive'po'sition, yieldable means normally 're
taining >said slips retracted or in their inner posi
tion, a set collar connected to the lower end of the
cage, a packer support depending ‘fro-inthe set
collar, a sleeve-like expansible packer beneath the
set collar around said support, a sleeve around
said packer support whose upper end
an abut
ment against the lower end of the packer, a lower
downwardly taperingV slip-expander carried by the »
lower end of said> sleeve, a lower tubular cage,
casing engaging slips in said »lowerr cage around
said lower expander, yieldable means normally
holding the slips in the lower ‘cageretracted an'
inner tubing extending through s_aid cages, a cou
pling on said inner' tubing releasablyconnected to'
the lower cage, an upwardly facing> shoulder on
said inner tubing engageable with the lower en‘d
of the upper expander upon upward movement
of the inner tubing, a downwardly facing shoul
der on the inner tubing above the upper expander' 60
expander, releasable means initially retaining the
expander in inactive position, yieldable means
normally retaining said slips retracted or in their
inner position, a set collar connected to the lower
end of the cage, a seal within the' set collar adapt
ed to seal around an inner tubing, a packer sup
port depending from the'set collar, asleeve-like
expans'ible packer beneath the'set collar around
said support, a sleeve around said packer support
whose upper end has an abutment against the
lower end of the packer, a lower downwardly ta
pering slip-expander carried by the lower end 'of
said sleeve, a lower Vtubular cage, casing engaging
slips in said lower cage around said lower expand
er, yieldable means normally holding the slips in
the lower cage retracted, an inner tubing extend
ing through said cages »and seal,‘a coupling on said
inner tubing releasably connected to the lower
cage, an- upwardly Yfacing’ shoulder on'said inner
tubing engageable with the lower end o'f tlie up
per expander upon upward movement of- the tub
ing, a downwardly facing shoulder on- the inner
tubingabove the upper expander arranged to en
gage the upper expander and move the upper
cage, the set collar,`t~he packerïand »the lower Vex
pander downwardly, upon release of the inner
tubing-from the lower cage and the downward>
movement of the inner tubing, whereby the lower'
rslips will be expanded by the lower expa?der’and
caused-to engage the casing to support the packer
and to -cause expansion »of thefpac'ker upon >fur
ther downward mover-nent of the innertubing;
said upper expander being releasable and down
ward-ly movable by the weight of -the tubing to
expand the upper slips- into engagement with the
casing, said innerí tubing havingV` perforations
which aresabove said seal when the tubing is inV its
upper position but which are below said seal when
the tubing is moved downwardly to set theV packer.
WALTER L. CHURCH.W ' '
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