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Патент USA US3055440

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Sept. 25, 1962
'
E.‘ H. CLARK, JR., ETAL
3,055,431
CONVERTIBLE PACKER AND TUBING ANCHOR
Filed. Nov. 14, 1958
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WALL/19M D. M YEes
INVENTORS.
BY
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Sept. 25, 1962
E. H. CLARK, JR., EI'AL
3,055,431
CONVERTIBLE PACKER AND TUBING ANCHOR
Filed Nov. 14, 1958
$10.0’.
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INVENTORS
BY
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WWW
Sept. 25, 1962
E. H. CLARK, JR., EI'AL
3,055,431
. CONVERTIBLE PACKER AND ‘TUBING ANCHOR
Filed NOV. 14, 1958
flvfG'a 40
5 Sheets-Sheet 3
E6062
PV/ZL/AM 17. MYERS
INVENTORS
the
3,®55,43l
Patented Sept. 25, 1962
2
3,055,431
(IONVERTHBLE PACKER AND TUBING ANCHQR
Earnest H. Clark, Jr., and William D. Myers, Downey,
(Iali?, assignors to Baker Oil Tools, Inc., Los Angeles,
Calif., a corporation of California
Filed Nov. 14, 1953, Ser. No. 773,943
16 Claims. (til. 166-4140)
The present invention relates to subsurface well bore
apparatus, and more particularly to well packer and anchor
6 is a cross-section taken along the line 6—6 on
r
.
1;
FIG. 7 is an enlarged fragmentary cross-section taken
along the line 7-7 on ‘FIG. la;
FIG. 8 is a side elevation of the control slot or groove
portion of the apparatus.
The apparatus A illustrated in the drawings is a well
packer, which is convertible to an anchor whenever de
sired. The apparatus is lowered through a well casing
B on a tubular string C, such as a string of tubing extend
apparatus for performing diverse operations in the well
ing to the top of the well bore, to the desired location at
bore.
which it is to be set within the well casing. It is also
An object of the invention is to provide an apparatus
capable of being removed from the well casing after hav
which is capable of functioning as a well packer in per
ing been set therein.
forming certain desirable operations in the well bore, such 15
The apparatus includes a central tubular body 10 hav
as squeezing, formation fracturing, treating or testing, and
ing a lower threaded pin 11 for attaching it to a threaded
of thereafter being converted, while in the well bore, to
box 12 of a lower tubing 13 that may extend downwardly
an anchor for the tubing string to which the apparatus
in the well casing to any desired depth. The upper end
is attached in the event the well is to be pumped, in order
of the body member 10‘ is threadedly attached to an upper
that the tubing string can be placed in tension to eliminate
body member extension 10a thereof having a threaded
tubing buckling and breathing that would otherwise result
box 14 for securing the body member to the lower pin
from the reciprocation of the pump and the string of
end 15 of the tubing string C, which extends to the top
sucker rods attached thereto.
of the well bore.
Another object of the invention is to provide an ap
As speci?cally disclosed, the apparatus A is capable
paratus convertible from a well packer to an anchor while
of being secured to the well casing against upward move
in the well bore, thereby effecting substantial economies
ment therewithin. Thus, an upper set of circumferentially
by saving a round trip that would otherwise be necessary
spaced segmental slips 16 is disposed around the body,
in removing a packer from the well bore and then run
these slips being mounted in longitudinal slots 17 in a slip
ning an anchor thereinto.
A further object of the invention is to provide an appa
ratus that functions as a packer during swabbing of the
tubing string to which the apparatus is attached, thereby
eliminating the need for swabbing or removing the ?uid
in the annulus around the tubing, and insuring that the
ring or sleeve 18 slidable on the body 10. The lower por
30 tion 19 of each slip is constituted as an anchor having
external wickers or teeth 20 facing in an upward direc
tion, which are adapted to embed or dig in the Wall of
the well casing B. Above the anchor portion, each slip
has a drag portion 21 adapted to frictionally slide along
load of ?uid in the annulus is not imposed on the produc 35 the Wall of the well casing, the friction force being pro
ing formation, the apparatus then being convertible to an
vided by one or a plurality of helical compression springs
anchor, without removing the apparatus from the well
22 engaging the base of the groove 17 and disposed in
bore, to secure the tubing string in the well bore with
sockets 23 in the drag portion and engaging the base
the packing element in ineffective position.
thereof. Outward shifting of the upper portions of the
An additional object of the invention is to provide
slips is limited by engagement of their upper terminals 24
an apparatus capable of being converted from a well
with the depending rim 25 of a stop ring 26 suitably
packer to an anchor while in the well bore, the appa
secured to the slip ring 18, as by means of one or more
ratus being readily retrievable from the well bore when
longitudinal extending screws 27. Such outward move
ever desired.
ment is also limited by an encompassing ring 28 disposed
This invention possesses many other advantages, and 45 in external grooves 29 provided between the drag and
has other objects which may be made more clearly appar
anchor portions of the slips. To insure joint longitudinal
ent from a consideration of a form in which it may be
movement of all of the slips 16 in the well casing, the
embodied. This form is shown in the drawings accom
lower portion of the slip ring has an outwardly directed
panying and forming part of the present speci?cation. It
?ange 30 adapted to engage the encompassing ring 28.
will now be described in detail, for the purpose of illus 50 Thus, during upward movement of the slip ring 18 With
trating the general principles of the invention; but it is
the body 10 of the tool, the ?ange 30 will engage the en
to be understood that such detailed description is not to
compassing ring 28 and shift it against the upper sides
be taken in a limiting sense, since the scope of the inven
of the grooves 29, to carry all of the slips 16 upwardly
tion is best de?ned by the appended claims.
Referring to the drawings:
FIGURES 1 and la together constitute a combined side
elevational view and longitudinal section through an ap
with the slip ring. Joint downward movement of the slips
is secured by virtue of engagement of the stop ring 26
with their upper terminal portions 24.
It is to be noted that the springs 22 urge the drag por
tions 21 of the slips outwardly so that they have flat or
in position for lowering the apparatus in a well casing,
surface engagement with the wall of the well casing. At
60 this time, the anchor portions 19 are disposed in an in
FIG. 1a constituting a lower continuation of FIG. 1;
FIG. 2 is a view similar to FIGS. 1 and In on a reduced
ward position in which their wickers or teeth 20 are free
scale showing the apparatus in operation as a well packer
from engagement with the wall of the well casing, such
anchored in packed-off condition against the well cas
portions thus being disposed in a retracted position. The
anchor portions are adapted to be shifted outwardly into
ing;
FIG. 3 is a view similar to FIG. 2 disclosing the ap 65 engagement with the well casing by an expander 32. slid
paratus converted to an anchor for securing the apparatus
ably mounted on the body 10. This expander has an
in the well casing;
external expander surface 33 inclined in an upward and
FIG. 4 is a view similar to FIGS. 2 and 3, illustrating
inward direction adapted to engage companion surfaces
the apparatus in condition for removal from the well cas
34 on the interiors of the anchor portions 11 of the slips
70 16. When the expander 32 moves upwardly it will en
ing under emergency release conditions;
'FIG. 5 is a cross-section taken along the line 5—5 on
gage the slip surfaces 34 and rock the slips 16 on the
casing to shift the anchor portions 19 outwardly and se
FIG. 1;
paratus embodying the invention, with the parts disposed
3,055,431
lower ends may engage the" casing, or, for that matter,
none of the drag portions may engage the casing.
The expander 32 is operatively connected to a packing
structure 35 disposed therebelow. As shown, it is thread
edly attached to a connector sleeve 36 slidable along the
A;
inbelow, until an upwardly facing shoulder 53 on the body
engages the lower end of the shear ring or sleeve 50. The
upward force imposed on the body member 10 will then be
transmitted through the shear ring or sleeve and its ?ange
51 to the expander 32, and from the expander to the
slips 16, to hold the latter outwardly in anchoring en
gagement with the well casing. In the event the ?ange
body, a packing element or sleeve 37, made of rubber or
51 is sheared from the sleeve 50, the body 10 can move
3
cure their teeth 20 against the wall of the well casing,
while the drag portions 21 shift inwardly, so that only their
upwardly with the sleeve until the latter engages the lower
rubber-like material, being disposed on the connector
sleeve with its upper end engaging the lower end of the 10 end of the slip ring 18, to move the entire slip structure
upwardly with the body, as described hereinbelow.
expander 32 and a gauge ring 38 threaded thereon, which
In order to expand the anchoring portion 19 of the
will determine the effective annular clearance space with
the well casing B that must be bridged by the packing
slips and the packing structure 35 against the well casing,
element 37 when it is expanded against the well casing.
the expander 32 must be moved upwardly behind the
The expander 32 and gauge ring 38 together constitute 15 anchoring portions 19. Initially, such relative movement
an upper abutment for the packing element 37. The lower
is prevented by a control mechanism 55 between the slip
end of the packing sleeve 37 engages a guide or lower
abutment ring or actuator 39 which is adapted to en
gage an outwardly directed lower ?ange 41} on the connec
trol mechanism includes a slot or groove structure 56
prevented by a suitable side seal, such as a rubber or
57 inwardly. However, when moved relatively down along
rubber-like 0 ring 45, mounted in a peripheral groove
the longitudinal leg 59 of the slot 56, it will engage its
lower tapered or cam end 61 and be urged outwardly
structure and the body of the tool. As shown, the con
provided in the exterior of the body 10 and adapted to
tor sleeve. Threadedly secured to the guide ring 39 is 20 receive a lock pin 57 carried by the slip stop ring 26.
This lock pin may be disposed in the holding portion 58
a thrust sleeve or actuator 41 depending therefrom, which
has a lower internally threaded portion 42 that initially
of the slot structure which is displaced arcuately to one
meshes with a companion externally threaded head 43 ex
side of a longitudinal slot portion 59, into which the pin
tending outwardly from and integral with the body 10 of
57 can be moved relatively by being shifted from its hold
the tool. The relative downward position of the body 25 ing portion 53 through a horizontal portion 60 to the up
10 with respect to the thrust sleeve 41 is limited by en
per end of the longitudinal slot portion 59. The lower
gagement of the head 43 with an inwardly directed ?ange
end 61 of the longitudinal slot is tapered in a downward
44 at the lower end of the thrust sleeve.
and outward direction to shift the lock pin 57 outwardly
In expanding the packing element 37 against the well
of the slot or groove structure 56 and permit it to slide
casing B, the guide ring or lower abutment 39 is moved 30 upon the periphery of the body 10 of the tool. To en
toward the expander or upper abutment 32, 38, the guide
able such radial or lateral shifting of the lock pin 57, it is
sliding along the connector sleeve 36. Such relative mo
yieldedly mounted in the stop ring 26. Thus, the lock
tion between the parts foreshorten the packing sleeve 37
pin 57 is slidable radially within a guide screw 62 that is
and results in its outward expansion from its retracted
threaded radially in the stop ring. A helical compression
position into sealing engagement with the wall of the well 35 spring 63 is disposed in the guide screw, its inner end en
casing, as well as into sealing engagement with the pe
gaging the outer end of the lock pin 57 and its outer end
riphery of the connector sleeve 36. Leakage of ?uid be
engaging the guide screw 62, which also functions as a
tween the connector sleeve and the body 10 of the tool is
spring seat. The spring 63 normally urges the lock pin
46 of the body 10 and slidably and sealingly engaging the
against the force of the spring 63, the lock pin then rid
ing upon the periphery of the body 11}.
inner surface of the connector sleeve 36.
Upward movement of the guide ring 39 toward the ex
pander 32 can occur while preventing relative rotation be
tween the connector sleeve 36 and the thrust sleeve 41 by
providing a slidable spline connection between the connec
In the use of the apparatus, the parts are ?rst disposed
in the relative positions shown in FIGS. 1 and la, in
which the ‘lock pin 57 is disposed in the lock portion 58
tor sleeve and the thrust sleeve. Thus, the lower portion
of the slot or groove 56. This locking location will pre
vent longitudinal movement of the entire slip structure
of the connector sleeve 36 has a key 47 secured therein
which extends within an inner longitudinal keyway 48
along the body of the tool 10, such that the slip structure
is carried ‘downwardly with the body of the tool, the an
extending substantially along the whole length of the
thrust sleeve 41. This slidable spline connection permits
chor portions 19 of the slips 16 ‘being disposed inwardly.
the thrust sleeve 41 and the lower guide ring 39 to move
The downward movement of the body 10 is transmitted
through the threaded connection 43, 42 to the thrust sleeve
upwardly while preventing relative turning between the
connector sleeve 36 and thrust sleeve 41. The key 47 is
also extended inwardly so as to be disposed under a down
wardly facing body shoulder 49, in order that downward
movement of the body 10 can engage the stop on the con
nector sleeve provided by the key 47 and shift the con
nector sleeve 36 downwardly with the body.
The expander 32 is not slidable directly upon the body
member, but is preferably mounted upon a sleeve 50
which, in turn, is slidable on the body member 10. This
sleeve is connected to the expander 32 and the connector
sleeve 36 by a shear device that is capable of being dis
rupted to free the sleeve from the expander and connec
tor sleeve. As shown, the lower end of the sleeve 50 may
have an outwardly projecting ?ange 51 clamped between
41, the guide ring 39 engaging the ?ange 40 of the con
5
nector sleeve 36 to pull the connector sleeve and the ex
pander 32 downwardly with it, the packing element 37
then ‘occupying its retracted position. The apparatus is
lowered in the well ‘casing with the drag portions 21 of
the slips sliding along the wall of the well casing and with
the expander 32, packing structure 35 and thrust sleeve
6) O
41 moving downwardly with the body, the parts being
retained in the positions shown in FIGS. 1 and 1a.
When the location in the well casing is reached at
which the apparatus is to be anchored in packed-‘off con
dition therewithin, the tubing string C and the body 10 of
the tool are turned to the left. Since turning of the entire
the expander 32 and the upper end of the connector sleeve
36. Shearing of this ?ange will permit the sleeve 50 to
shift upwardly and come into engagement with the lower
end of the slip ring 18, in the manner described herein
below. The sleeve 50 has the purpose of providing an
slip structure is resisted by the frictional engagement of
the drag portions 21 against the wall of the well casing,
such left-hand turning will result in an arcuate shifting
of the slot portion 56 of the body to the left to place
the lock pin 57 in alignment with the depending leg por
annular space 52 between the connector sleeve and ex
tion 59 of the slot structure.
pander and the periphery of the body member 10, en
abling the body member to move upwardly within the
be elevated which will elevate the body 10 of the tool
and the parts of the tool surrounding the body below the
connector sleeve 36 and expander 32 as explained here
The tubing string C can now
75 slips 16, the slip structure being prevented from moving
5
3,055,431
6
upwardly by the ‘frictional engagement of the drag por
tions 21 against the wall of the well casing. The body of
performed in the Well bore with the apparatus operating
the tool is moved upwardly until the expander 32 moves
setting location, into an anchor by rendering the packing
as a well packer, it can be converted, while remaining in its
upwardly behind the anchor portions d9 of the slips,
structure 35 ineffective, the expander 32 and slip struc
rocking the slips on their drag portions 21 to shift the 5 ture '16 still remaining in anchored condition against
anchor portions 19‘ outwardly into anchoring engagement
the wall of the well casing. To e?ect the conversion of
with the wall of the well casing, the drag portions mov
the tool to an anchor, the slips 16 are set in the positions
ing in the opposite or inward direction.
disclosed in FIG. 2 by maintaining an upward strain on
After the expander 32 has been wedged behind the lan
the tubing string C and body 10 of the tool, which, for
lch-or portions '19 it cannot move outwardly to any fur 10 example, may be of the order of 3,000 to 5,000‘ pounds.
ther extent. Accordingly, a continuation of the upward
The tubing string C and body it] are then rotated in a
movement of the body it? will carry the thrust sleeve 41
right-hand direction. Since the threaded connection 43,
upwardly with it, causing the lower abutment 39 to move
42 between the body head and the thrust sleeve 41 is pref
toward the upper abutment and expander 38, 32 for the
erably left-‘hand, the right-hand rotation oi’ the body and
purpose of *?oreshor-tening the packing sleeve 37 and ex 15 its head 43 will result in a relative downward ieeding of
panding it outwardly against the wall of the well casing,
the thrust sleeve 41 along the body head, the lower abut
such ‘as disclosed in FIG. 2. The apparatus has now been
ment 39 moving down along the ‘connector sleeve 36
anchored in packed-off condition against upward move
and away ‘from the upper abutment and expander 38, 32.
ment in the well casing. The desired operation can now
until the threaded portion 42 of the thrust sleeve 41 be
be per-termed. ‘ Thus, if cement slurry is to be squeezed 20 comes completely unthreaded from the body head 43
into the well bore, the required quantity or charge of
and moves therebelow, the body head then shifting into an
slurry is pumped down the tubing string C, passing down
enlarged inside diameter portion '71 of the thrust sleeve.
wardly through the tool A and discharging into the well
The thrust sleeve 41 can then drop downwardly to its full
easing B at a point therebelow ‘for movement into the
est extent, as determined by engagement of the guide
torination or behind the casing. On the other hand, if 25 ring or lower abutment 39 with the connector sleeve
the iormation is to be hydraulically fractured or an acid
?ange 40, the packing 37 inherently shifting to its initial
treatment performed, the necessary ?uid or ?uent material
retracted position (FIG. 3). in fact, with an upward
is pumped down the tubing string C, passing through the
strain maintained on the tubing string C and body 10
apparatus A, then outwardly thereof into the formation.
of the tool, their right-hand rotation can, at ?rst, produce
The particular ?uent material employed can be io-rce-d 30 upward threading of the head 43 in the sleeve 41, and
under relatively high pressures into the formation, the well
elevation of the body within the packing structure 35, until
packer A preventing passage of ?uid upwardly around
the shoulder 53 engages the lower end of the shear sleeve
the tool, the well packer being anchored against the well
‘5h. Thereafter, continued rotation of the tubing string
casing by the coaction between the expander 32 ‘and the
C and body '10 produces downward feeding of the thrust
slips 16.
35 sleeve 41 until its threaded portion 42 is completely un
If desired, the formation can be tested as by swabbing
threaded from the body head 43, the sleeve 41 dropping
the tubing string C. Maintenance of a suitable upward
strain on the tubing string C will retain the packer an
downwardly to its fullest extent, as shown in FIG. 3.
casing, if desired; or can be removed entirely from the
‘locationin the tubing string, under the action of the usual
well casing. During elevation of the apparatus in the well
casing, relative upward movement of the expander 32
toward the anchor portions '19 is prevented by the tact
that the slip structure is connected to the body 10 of the'
tool through the agency of the lock pin 57.
After the apparatus has been anchored in ‘packed-cit
condition in the well casing, ‘and the desired operation 75
sucker rods connected thereto and extending through the
tubing string C irom the pumping unit at the top of the
well bore.
During rotation of the vtubing string C and body it} of
chored in packedeofi condition in the well casing, prevent
the tool, the thrust sleeve 4-1 is prevented from rotating,
ing the annular column of ?uid in the tubing-casing an 40 since it has the spline connection 47, 48 with the con
nulus 70 above the well packer from being imposed on
nector sleeve ‘36, which is prevented from rotating by the
the diormation. The tubing can be swabbed to the proper
wedging action of the expander 32 behind the anchored
slips 16.
extent, to effect the desired test of the producing forma
tion in the well bore.
The packing unit 35 of the apparatus is thereby ren
‘If the apparatus is to be used merely as a packer, its 4:5 dered ineffective, and the tubing string C and body #10 of
operation as described above is all that is necessary for
the tool are movable upward-1y until the upwardly frac
it to be anchored in packedeoif condition in the well cas
ing body shoulder 53 engages the shear ring or sleeve 56.
ing. To release the packer A and remove it from the
An upward strain then taken on the tubing string C and
well bore, the tubing string C and body it) are moved
body it} would be transmitted through the expander 32
downwardly to shi?t the lower abutment 39‘ away from 50 to the anchor portions 19‘ of the slips 16, the expander
the upper abutment ~32, 33, allowing the packing sleeve
holding such slips outwardly in anchoring engagement
37 to retract inherently. When the lower abutment 3?
with the wall of the well casing. If the expander 32 has
engages the connector sleeve ?ange 44}, it pulls the con
dropped down away from the slips as during the un
nector sleeve 36 and the expander 32. downwardly, the
threadin-g of the thrust sleeve 41 from the body head 43,
expander moving away ‘from the anchor portions 19 of
upward movement of the tubing string C and body it‘!
the slips, allowing the springs 22 to rock the drag por
will bring the body shoulder 53 against the shear ring
tions 21 back into 'full engagement with the wall of the
sleeve 50, the expander 32 then moving upwardly behind
well casing, and the anchor portions 19 inwardly away
the slips 16, which ‘are prevented ‘from moving upwardly
‘from the wall of the well casing. The packing struc
by the ‘frictional engagement of the drag portions 21
ture 35 and the slip structure have thus been released 60 against the wall of the well casing B. The desired ten
from the well casing and can be retained in such released
sion can now be taken on the tubing string C, which will
position by relocating the lock pin 57 back in the con
be transmitted directly from the body 10 through the
trol slot structure 56, the body being appropriately turned
shear sleeve 50 to the expander 32, and then through the
to place the lock pin back in the locking portion 58 of
slips 16 to the wall of the well casing. The maintenance
the slot structure at the upper end thereof, The well
of the tubing string C in tension at the desired value will
packer is now in its initial retracted position (FIGS. 1, 1a)
eliminate tubing buckling ‘and breathing resulting nrom
and can be moved to a new setting location in the well
reciprocation of the pumping unit,>mounted at a desired
,It is, therefore, apparent that the packer has been
readily converted to an anchor without the necessity for
removing any apparatus ‘from the well bore. Thus, a
round trip has been saved, with resulting economies due
3,055,431
7
8
to the fact that a single tool has been provided for per
forming both a packer function and an anchor function,
eliminating the necessity for removing a packer i?rom the
well casing and then running an anchor thereinto when
the tubing string is to be maintained in tension, particu
larly in a pumping well.
actuated to release said actuating means to permit said
packing means to retract from expanded position, and
means on said body engaging said gripping means for
retaining said gripping means engaged with the casing
while said packing means is in its retracted position.
2. In well apparatus of the type adapted to be dis
posed in a well casing on a running-in string and wherein
a body is anchored to the well casing by gripping means
engaging the latter, there being packing means on the
In the event the apparatus, now ‘converted to an anchor,
is to be removed from the well bore, it is merely necessary
to lower the tubing string C and the body 19 of the tool.
Such lowering action will result in a. downward move 10 body adapted to be expanded against the well casing, the
combination therewith of actuating means on the body
ment of the body until the threads on the head 43 engage
engaging said packing means to expand said packing means
the uppermost thread on the thrust sleeve portion 42, the
against the casing, means on said body responsive to move
downward movement then being transmitted through the
ment of said body to release said actuating means to
guide ring 33 to the connector sleeve 36, and from the
latter to the expander 32, shitting the expander down 15 permit said packing means to retract from expanded posi
tion, and means on said body engaging said gripping means
wardly away ‘from the slips 16 and allowing the springs
for retaining said gripping means engaged with the casing
22 to rock the drag portions 21 outwardly and the anchor
while said packing means is in its retracted position.
portions 19 inwardly away from the well casing. The
3. In well apparatus of the type adapted to be dis
body 10 is manipulated until the lock pin 57 is again dis
posed in the control groove or slot 56, the body being 20 posed in a well casing on a running-in string and wherein
a body is anchored to the well casing by normally re~
turned to position the pin in the locking portion 58 of the
tracted gripping means expanded into engagement with
slot. When this occurs, the tubing string C ‘and body 10
the casing in response to longitudinal movement of the
can be elevated, the slip structure being retained in its
body in one direction, there being packing means on the
upper position. on the body it) ‘and the body shoulder 53
moving upwardly to engage the shear sleeve 50 and carry 25 body adapted to be expanded against the well casing, the
combination therewith of actuating means movable in
the expander 32 and connector sleeve 36 upwardly with
response to longitudinal movement of said body in said
it. The ?ange 40 on the connector sleeve will engage
one direction to expand said packing means against the
the guide ring 39 to carry the thrust sleeve 41 upwardly
casing; means responsive to movement of said body to
with it.
In the event that the tool will not release satisfactorily, 30 release said actuating means to permit said packing means
to retract from expanded position, and means on said
permitting the lock pin 57 to be relocated in the lock por
body engaging said gripping means for retaining said
tion 58 of the control slot 56, a sufficient upward strain
gripping means engaged with the casing while said pack
is taken on the tubing string C and body 10, with the ex
ing means is in retracted position to anchor said body
pander 32 disposed behind the slips r16, to shear the ?ange
51 of the shear sleeve 50 from the remainder of the shear 35 against movement in said one direction.
4. In Well apparatus of the type adapted to be disposed
sleeve. The body can then move the shear sleeve 50 up
in a well casing on a running-in string and wherein a body
wardly until it engages the lower end of the slip ring 18.
has normally retracted packing means thereon and is an
An upward force can then be imposed on the slip ring 18,
chored to the casing by means shifting an expander on
which is transmitted through the encompassing ring 28 to
the slips l6, forcing the slips upwardly with respect to
the expander 32 and allowing the springs 22 to shift the
‘drag portions 211 outwardly and the anchor portions 19
of the slips inwardly. The apparatus can now be removed
from the well bore, the parts occupying the positions
shown in FIG. 4. The threaded head 43 on the body will
engage the lower end of the connector sleeve 36 to carry
such connector sleeve and expander 32 upwardly, the
connector sleeve ?ange 40 engaging the guide ring 39 to
carry it, together with the thrust sleeve 41 connected
thereto, upwardly. The apparatus can now be elevated
within and removed from the well casing C, with the an
chor portions 19 of the slips 16 remaining in their re
tracted position.
It is to be noted that the safety shear portion 51 of the
apparatus is only subject to strain after the [apparatus has
been converted ‘from a packer to an anchor. Thus, rela
tively high pressures that might ‘be imposed on the ?uid
in the well bore when the apparatus is functioning as a
packer are not imposed on the shear device. It is only
when the apparatus has been converted to an anchor that
the upstrain on the apparatus is transmitted through the
shear ring 51 to the expander 32. This upstrain can be
controlled and is kept at the desired value, which is nor
40
the body into engagement with normally retracted slips
to expand them into anchoring engagement with the cas
ing, the combination therewith of actuating means on the
body engaging said normally retracted packing means to
expand said packing means against the casing, means
on said body adapted to be actuated to release said actu
ating means and permit said packing means to retract from
expanded position, and means on said body engaging said
expander for retaining said expander engaged with said
slips in casing anchoring position while said packing means
is in its retracted position.
5. In well apparatus of the type adapted to be disposed
in a well casing on a running-in string and wherein a body
has normally retracted packing means thereon and is
anchored to the casing by means shifting an expander
above the packing means upwardly into engagement with
normally retracted slips to expand them into anchoring
engagement with the casing, the combination therewith of
actuating means movable upwardly on the body and en
gaging said normally retracted packing means to expand
the packing means against the casing, means on said
body adapted to be actuated to release said actuating
means and permit said packing means to retract from ex
panded position, and means on said body engaging said
expander for transmitting an upwardly directed force to
mally well below the yield point of the tubing string C,
so that the latter is not subjected to a strain beyond its 65 said expander to retain said expander engaged with said
slips in casing anchoring position while said packing
elastic limit.
means is in its retracted position.
The inventors claim:
6. ‘In well apparatus adapted to be disposed in a well
1. In well apparatus of the type adapted to be disposed
casing on a running-in string: a body; normally retracted
in a well casing on a running-in string and wherein a body
is anchored to the well casing by gripping means engag 70 slips on said body; an expander on said body engageable
with said slips; normally retracted packing means on said
ing the latter, there being packing means on the body
body; actuating means movable in response to longitu
adapted to be expanded against the well casing, the com
dinal movement of said body to expand said packing
bination therewith of actuating means on the body en
means against the casing and to shift said expander into
gaging said packing means to expand said packing means
against the casing, means on said body adapted to be 75 engagement with said slips to expand them against the
3,055,431
casing and retain said slips and packing means expanded
against the casing; means responsive to additional move
ment of said body to release said actuating means to per
mit said packing means to retract from expanded position
and means on said body engaging said expander for re
taining said expander engaged with said slips with said
slips in casing anchoring position while said packing means
is in its retracted position.
7. In well apparatus adapted to be disposed in a well
casing on a running-in string: a body; normally retracted
slips on said body; an expander on said body engageable
with said slips; normally retracted packing means on said
body; actuating means movable in response to longitu
dinal movement of said body to expand said packing
means against the casing and to shift said expander into
engagement with said slips to expand them against the
casing and retain said slips and packing means expanded
against the casing; means responsive to rotation of said
body to release said actuating means to permit said pack
ing means to retract from expanded position; and means
on said body engaging said expander for retaining said
expander engaged with said slips with said slips in casing
anchoring position after said body has been rotated to
permit retraction of said packing means and while said
into engagement with said slips to expand said slips against
the casing and retain said slips and packing means ex
panded against the casing; means including threaded means
relatively rotatable by said body to release said actuating
means and permit movement of said abutments away from
each other to permit retraction of said packing means from
expanded position; and means on said body engaging said
expander for retaining said expander engaged with said
slips with said slips in casing anchoring position while said
packing means is in its retracted position.
11. In well apparatus adapted to be disposed in a Well
casing on a running-in string: a body; normally retracted
slips on said body; an expander on said body engageable
with said slips; a normally retracted packing structure on
said body comprising upper and lower abutments and
pliant, elastic packing means between and engageable with
said abutment; actuating means movable in response to
longitudinal movement of said body to shift one of said
abutments toward said other abutment to expand said
packing means against the casing, said actuating means
acting through said packing structure to shift said expander
into engagement with said slips to expand said slips against
the casing and retain said slips and packing means ex
panded against the casing; threaded means connected to
packing means is in its retracted position.
25 one of said abutments; threaded means meshing with said
8. In well apparatus adapted to be disposed in a well
other threaded means and rotatable relative thereto by
casing on a running-in string: a body; normally retracted
said body to release said actuating means and permit
slips on said body; an expander on said body engageable
movement {of said abutments away from each other to per
with said slips; normally retracted packing means on said
mit retraction of said packing means from expanded posi
body; actuating means movable in response to longitudi 30 tion; and means on said body engaging said expander for
nal movement of said body to expand said packing means
retaining said expander engaged with said slips with said
against the casing and acting through said packing means
slips in casing anchoring position while said packing means
to shift said expander into engagement with said slips to
is in its retracted position.
expand them against the casing and retain said slips and
12. In well apparatus adapted to be ‘disposed in a well
packing means expanded against the casing; means re 35 casing on a running-in string: a body; normally retracted
sponsive to additional movement of said body to release
slips on said body; an expander on said body below and
said actuating means to permit said packing means to re
engageable with said slips; a normally retracted packing
tract from expanded position; and means on said body
engaging said expander for retaining said expander en
gaged with said slips with said slips in casing anchoring
structure on said body below said expander comprising an
upper abutment secured to said expander, a lower abut
40 ment, and pliant, elastic packing means between and en
position while said packing means is in its retracted posi
gageable with said abutments; actuating means connected
tion.
to said lower abutment and movable in response to upward
9. In well apparatus adapted to be disposed in a well
movement of said body to shift said lower abutment up
casing on a running-in string: a body; normally retracted
wardly toward said upper abutment to expand said pack
slips on said body; an expander on said body engageable 45 ing means against the casing, said actuating means acting
with said slips; a normally retracted packing structure on
through said packing structure to shift said expander up
said body comprising upper and lower abutments and pli
wardly into engagement with said slips to expand and
ant, elastic packing means between and engageable with
anchor said slips against the casing to prevent their upward
said abutments; actuating means movable in response to
movement therewithin and retain said slips and packing
longitudinal movement of said body to shift one of said 50 means against the casing; means responsive to additional
abutments toward said other abutment to expand said
movement of said body to release said actuating means and
packing means against the casing, said actuating means
permit movement of said abutments away from each other
acting through said packing structure to shift said ex
and retraction of said packing means from expanded posi
pander into engagement with said slips to expand said
tion; and means on said body engaging said expander for
slips against the casing and retain said slips and packing 55 transmitting upwardly directed strains on said body
means expanded against the casing; means responsive to
through said expander to said slips to hold said slips
additional movement of said body to release said actuating
anchored to the casing against upward movement there
means and permit movement of said abutments away
within while said packing means is in its retracted position.
from each other to permit retraction of said packing
13. In well apparatus adapted to be disposed in a well
means from expanded position; and means on said body 60 casing on a running-in string: a body; normally retracted
engaging said expander for retaining said expander en
slips on said body; an expander on said body below and
gaged with said slips with said slips in casing anchoring
engageable with said slips; a normally retracted packing
position while said packing means is in its retracted posi~
structure on said body below said expander comprising
tion.
an upper abutment secured to said expander, a lower abut
10. In well apparatus adapted to be disposed in a well 65 ment, and pliant, elastic packing means between and
casing on a running-in string: a body; normally retracted
engageable with said abutments; actuating means con
slips on said body; an expander on said body engageable
nected. to said lower abutment and movable in response
with said slips; a normally retracted packing structure on
to upward movement of said body to shift said lower abut
said body comprising upper and lower abutments and
ment upwardly toward said upper abutment to expand
pliant, elastic packing means between and engageable with
said packing means against the casing, said actuating
said abutments; actuating means movable in response to
means acting through said packing structure to shift said
longitudinal movement of said body to shift one of said
expander upwardly into engagement ‘with said slips to ex
abutments toward said other abutment to expand said
pand and anchor said slips against the casing to prevent
packing means against the casing, said actuating means
their upward movement therewithin and retain said slips
acting through said packing structure to shift said expander 75 and packing means against the casing; a threaded mem
3,055,431
12
11
ber secured to said lower abutment; a threaded member
to expand the slips into anchoring engagement with the
meshing with said threaded member and rotatable by said
well casing and will move said lower abutment toward
body with respect to said other threaded member to re
lease said actuating means and permit movement of said
abutments away from each other and retraction of said
packing means from expanded position; and means on
said expander to expand said normally retracted packing
means against the casing and retain said slips and pack
ing means against the casing, rotation of said body
effecting downward threading of said actuator along said
body to shift said lower abutment downwardly away from
said expander to permit retraction of said packing means;
said body engaging said expander to retain said expander
engaged with said slips with said slips in casing anchoring
and means acting between said body and expander while
position while said packing means is in its retracted
position.
-
10 said packing means is in its retracted position for trans
'14. In well apparatus adapted to be disposed in a
well casing on a running-in string: a body; normally re
tracted slips on said body; an expander on said body below
mitting upwardly directed strains on said body to said
and engageable with said slips; a normally retracted pack
16. In well apparatus adapted to be disposed in a well
casing on a running-in string: a body; normally retracted
slips on said body; an expander on said body below and
engageable with said slips; a connector sleeve secured to
and depending from said expander; a lower abutment
slidable on said connector sleeve; normally retracted
expander to hold said expander behind said slips with
the slips in anchoring engagement with the well casing.
ing structure on said body below said expander com
prising an upper abutment secured to said expander, a
lower abutment, and pliant, elastic packing means be
tween and engageable with said abutments; actuating
means connected to said lower abutment and movable in
response to upward movement of said body to shift said
pliant, elastic packing means on said connector sleeve be
tween and engageable with said expander and lower abut
lower abutment upwardly toward said upper abutment to
expand said packing means against the casing, said actuat
ing means acting through said packing structure to shift
ment; an actuator secured to said lower abutment and de
pending therefrom, said actuator having threaded means
thereon; threaded means on said body engaging said
said expander upwardly into engagement with said slips
to expand and anchor said slips against the casing to
prevent their upward movement therewithin and retain
threaded means on said actuator whereby upward move
ment of said body will shift said expander against the
slips to expand the slips into anchoring engagement with
said slips and packing means against the casing; a threaded
member secured to said lower abutment; a threaded mem
the well casing and will move said lower abutment to
ber meshing with said other threaded member and rotat
able by said body with respect to said other threaded
member to release said actuating means and permit move
ward said expander to expand said normally retracted
packing means against the casing and retain said slips and
packing means against the casing, rotation of said body
effecting downward threading of said actuator along said
body to shift said lower abutment downwardly away
from said expander to permit retraction of said packing
ment of said abutments away from each other and re
traction of said packing means; and means acting be
tween said body and expander and including a frangible
connection through which upwardly directed strains on
said body are transmitted to said expander to hold said
expander engaged with said slips to hold said slips
anchored to the casing against upward movement there
within while said packing means is in its retracted
position.
means; frangible means secured to said expander; and
means on said body engaging said frangible means while
said packing means is in its retracted position to transmit
upwardly directed strains imposed on said body to said
40
expander to hold said expander engaged against said slips
and said slips anchored against the well casing, said
frangible means being disruptable when subjected to a
15. In well apparatus adapted to be disposed in a well
casing on a running-in string: a body; normally retracted
predetermined upwardly directed strain imposed on said
body.
slips on said body; an expander on said body below and
engageable with said slips; a connector sleeve secured
45
References Cited in the ?le of this patent
to and depending from said expander; a lower abutment
slidable on said connector sleeve; normally retracted
UNITED STATES PATENTS
pliant, elastic packing means on said connector sleeve be
2,442,529
Clark ________________ __ June 1, 1948
tween and engageable with said expander and lower abut
ment; an actuator secured to said lower abutment and de
pending therefrom, said actuator having threaded means
thereon; threaded means on said body engaging said
threaded means on said actuator whereby upward move
ment of said body ‘will shift said expander against the slips
2,564,240
2,690,225
2,711,795
2,715,441
2,802,534
Ware ________________ __ Aug.
Baker et a1 ___________ __ Sept.
Ragan _______________ __ June
Bouvier ______________ __ Aug.
Conrad ______________ __ Aug.
14,
28,
28,
16,
13,
1951
1954
1955
1955
1957
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