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Патент USA US2120981

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June» 21, 1938.
2,120,981
' L. A.'LAYNE ET Al.
SCREW OFF PACKER
Filed May 6, 1955
_.L..,un.,„_._ ,._ E_.
L
, \i
l5
INVENTOR.
LESLIE A. LAYNE
ALBERT l.. Roco
BY
HA RoLD G. BLOCK,
@om ÉCMTTORNEYS.
2,120,981
Patented June 21, 1938
UNITED STATES PATENT OFFICE
2,120,981
SCREW OFF PACKER
Leslie A. Layne, Albert L. Roco, -and nemico.,
BlcnckJlouston,l Tex.; said Roco and _Block as
signors to said Layne
Application May 6, 1935, serial No. 19,960 v
zo claims. (ci. 16e-1o)l
The invention relates to a screw off packer for
wells wherein a seal is to be obtained either be
tween a larger -string of pipe or the surface of
the well bore itself. '
‘
It is one ofthe objects of the invention to
-provide a packer assembly which is adapted >to
support a string of pipe inwhich the packer
may be incorporated.
\
'
'
Another object of the invention is to provide
a packer assembly which is particularly- adapted »
for very deep Wells wherein a part of the weight
of the .string of pipe above the packer maybe
used to set the packer and the assembly will
thereafter support the balance of the weight of
15 the string of pipe so that there will be no tendency
to destroy the packer by the application of ex
cessive weight.
'
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\
Another object is to provide a packer which
will be securely sealed against leakage from in
20 side of the string of pipe in which the packer is
incorporated;
.
‘
I
l
Another object of 'the invention is to provide
a seal oiî packer in which the weight of lthe
2
string of pipe above the packer serves to main
tain the packer in expanded position and to also>
maintain a seal against leakage under the packer.
being lowered into a well bore. -This string of
pipe will be made up of pipe sections connected
ogether by couplings 3, and may extend above
and below the packer which is illustrated gener
Vally at 4. The lower section of pipe 5 serves
as a support for the packer and the lower end»
of this pipe may have a screen, liner, or casing
on the lower end vthereof so long as this pipe
5 is rigidly supported to form a foundation for
the packer.
\
«
The pipe 5 has connected thereto the stop
collar `lì, which has the support pipe 1 threaded
thereto. The top of the collar 6 provides a shoul
der 8 on which the wrappings of vmaterial form
ing the packing 9 are arranged. Suitable wires 16
will be wound about the packing at Il to retain
the lower end thereof in ñxed position. This
packing 3 is arrangedby winding it about the
y.pipe 1 to form what will be termed the bottom
or lower packing member I3. The upper end of
this packing material isi also confined by wires
Il. This packing member I3 may be ofany de
sired length in order to obtain the necessary ex
pansion ‘when it is V‘collapsed longitudinally.`
The support pipe 1 continuesV above the lower 25
packing 'member I3 and has ñxed thereto the>
Another object of the invention is to provide
bushing I6 whose outer surface carries a coarse
part of the packer rotates during the unscrewingoperationv and the remainder of the packer re
vides a seat I8 for a ring of sealing material I3,
a two-part packer of the screw oif type wherein - thread I1. The upper end of this bushing I'B pro
30
mains stationary.
.
Another object of the invention is to provide
a screw off packer wherein the packing is not
subjected to distortion during the unscrewing
35
operation.
'
‘
Another object of the invention is to provide
. a stop portion for a screw off packer so that the
load of the pipe above the packer will not be
which is surmounted by a compression ring A2li. ` 30
vA stop ring 2| is threaded on the pipe 1 >in order
to retain the sealing material> and compression
ring in position. A setting sleeve 25 has its inner.
surface provided with a coarse thread 26 which
cooperates with the coarse thread i1 toA provide 35
the screw off connection for the packer. The
setting sleeve 25 is undercut vto form a shoulder
21, which serves as an abutment for the upper
end 28 of the top packing portion 30 of the packer.
Still another object> of the invention is to pro--4 "I'his upper portion will be confined by wires Il, 40
40
vide a screw oif packer having a setting sleeve the same as the previous packing material.
The setting sleeve 25 continues below the
which will telescope under a portion of the packer
after it has been partially set to obtain additional shoulder 21 but is of a reduced thickness as at 32
and gradually tapers off at 33 to the lower end 34,
expansion of that part of the packer.
A still further object of the invention is to pro-- ’ which is, as illustrated,'very thin. 'I'he bottom 45
45
vide a setting sleeve which telescopes beneath the of the top packing portion 3D of the packer is
-packervfabric so that any leakage under the packer also confined by wires Il directly adjacent the ‘
will be compelled to travel twice the length of the lower end 34 of the setting. sleeve. It will be
.noted that a space- 33 is provided between the
setting sleeve. ^
Other and further objects of the invention will ‘ lower end 39 of the top packing portion 30 and 50
50
the upper end 40 of the bottom packing element
_be readily apparent when the following descrip
I3. This space 38 will be of substantially the same
_tion is considered in connection with the accom
length as the threaded screw off connection be
panying drawing wherein:
`
‘_ Y
_
Fig. 1 is a central vertical sectional view_of the y tween the threads I1 and 26.
The upper end of -the setting sleev 2% >is
55 packer incorporated in a-string of pipe in posi
threaded to the swaged nipple 42 which has-an
tion to be lowered into the well. '
'
'
- Fig. 2- is a central vertical view showing the f inwardly directed shoulder 43 which is positioned
some distance above the upper end 44 of the'
packer in expanded or sealing position.
.
.
_
LThe drawing illustrates a string of pipe 2, which - support pipe 1.
~ With the parts assembled in the position shown
60 may be of any desired size or length, which is
supported on the packer.
>
2
.
f'
2,120,981
,in Fig. 1, the device win be iewered'inte'the nele
andisofadvantagebecauseofthecousem
where the packer is to be set and is preferably in
corporated in the string of pipe 2 as a part there
of. It is to be understood however that Vthis
tureoithethreadsl1and2¢,whicharenot'
packer may be made up as a separate assembly
now being set in the wells the entire 'nicht of
which is merely attached to any desired strainer,
liner, or casing, which is illustrated by the pipe 5.
, „ When the packer is to be set it is only nec
essary to rotate the string of pipe 2 in a right
10 hand direction so that the threads 26 rotate
upon the threads I1 and the setting sleeve moves
downwardly relative to the support pipe 1. This
adapted to maintain a seal.
_
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With the very long strings of Dipe‘which are
the string of pipe can not be advan
low
ered onto the packerand maintained thereby
without danger of cutting or shearing ci! the
packer completely. With the presmt arrange
ment a construction has been provided whereby 10
if the packer is completely set no more weight
>can be applied> thereto. This'advantase is ef
support pipe 1 is, of course, held stationary 'by` . feeted beeeuse'er the shoulder u which is adept- _
the engagement ci the pipe 5 on the bottom of' ed to ilrst engage the outer corner il or! the
compression ring 2l as it moves downwardly to 15
thenele.
.
As the setting sleeve 25 rotates, the upper
complete the expansion of the packer. The
packing portion 3II will, of course. rotate there- ' shoulder 43 as it engages the compresion ring
with. It will be noted that the sleeve-25 is un- ‘ v .20 causes this ring to move downwardly a short
dercut at 45 so that there will be no excessive distance to eiïect compression of the seal I9 and
During this ro- ' insure that a tight joint will be maintained at
tation of the setting sleeve the lower packing >this location.
_
'
portion I3 will remain stationary because it is
As soon as the compression ring moves down
iixed on the support pipe 1. As the- setting wardly a short distance the> shoulder 43 .comes
sleeve and packing portion 30 move downwardly into engagement with the corner 5I of thelock
the lower end 39 of the upper packing portion ing ring 2I on the top of the pipe 1, which is
will come into engagement with the upper end of suillcient strength to support the weight of
III of the lower packing member I3. When this the string of pipe in the well. A positive stop is
occurs, the expansion of both packings will be
thereby provided for the weight of the pipe after Y
gin. At approximately the same time the the packer has been collapsed and this weight
30 threads, 26 will be entirely screwed off of the can not be applied to the packer but is trans
threads 1 so that the setting sleeve will be re
ferred downwardly to the support pipe 1 and
leased from the bushing I6 and the upper sec there is, of course, no" tendency to shear ci!
tion of the string of pipe 2 will be free to move or cut oif the packer.v
l
downwardly i_n order to expand the packings I3
It seems obvious that a seal is obtained in
frictional resistance to rotation.
and 30. As the setting sleeve moves downward
ly the two packings are confined between the
shoulder 8 on the stop collar 6 and the shoul
der 21 on the setting sleeve until they are ex
panded into the position shown in Fig. 2. The
lower packing member I3 begins its expansion as
the thin edge 34 of the setting sleeve begins to„_
telescope thereunder. In this manner the pack
ing member I3'begins its/ expansion and there
after is wedged further outwardly because of the
increasing- thickness of the setting sleeve 25 as
it telescopes beneath the upper end thereof. Be
cause of this >arrangement a double expansion
of the packer is obtained and a perfect seal is
side oi the packer so that there can be no leak
age of fluid in either direction. The seal I9 is
assisted in the sealing operation of course be
cause of the length of the setting sleeve 25 and
the fact that it has been wedged underneath
the packing material of both the upper and low
The threads I1 and 26 prevent collapse Aoi! the
packer while it is being lowered into the well
bore and the fact that the upper and lower pack
ings are positioned on the setting sleeve and
the -support pipe respectively prevent any twist
ing or distortion of the layers of fabric making
up thepackin while the screwing oif operation '
thereby insured. The upper packing portion 30, is being carrie on.
of course, telescopes upwardly on the setting
While one form of the invention has been
sleeve, as shown in Fig. 2, so that it is also ex - shown and described it seems obvious that the
panded outwardly because of the increasing length and size of thewpackings and sleeves- may
thickness of the setting'sleeve.
l
be varied as desired.
-
.
The wedging action of the Atapered sleeve serves
What is claimed is:
'
-55 not only to expand the packings from the inside
1. A vpacker including a support pipe, a stop
while they are being collapsedlongitudinally, but , collar thereon, a setting sleeve telescoped over
also serves to wedge the inside of the packing said pipe, said sleeve being tapered downwardly
material firmly in position so that there can be ' to a. thin edge,- a threaded connection between
no leakage underneath the packing. Before any said pipe and sleeve, a seal adjacent said connec
60 ñuid may leak under the packing it is neces
tion to prevent leakage under said sleeve, and a
sary that it traverse at least twice the length of packer disposed on said pipe above said collar
the setting sleeve 25 because it must ilow' down
and on said sleeve whereby said sleeve will tele
wardly inside of the sleeve and-then upwardly
outside of the sleeve or vice versa. It seems
65 obvious that the abutment of the ends 39 and
40 together will prevent any leakage between
the upper and lower packings.
'I'he 'packing` or seal ring I9 is of particular ad
vantage because when the parts are assembled as
70 shown in Fig. 2, considerable pressure may be
applied to the inside of the string of pipe 2 in
order to wash down any cavings in the vwell or
to maintain a circulation-while the string of pipe
2 is being run into the well. This seal I9 pre
vents any leakage through the screw of joint
scope under said packer during the
operation.
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2. A well packer comprising :a setting sleeve,
a packing member thereon, a support lille tele
scopically related to said setting pipe, a pack
ing member> thereon, a setting pipe
vto
said sleeve, a releasable connection between said
supportv pipe and said setting sleeve so that said
sleeve may move on said pipe to abut said pack
ings, and a tapered end on said sleeve to tele
scope under the contact faces oi.' the packings
upon setting.
3. A well packer comprising a setting sleeve, 7l
2,120,981
a packing member thereon', a support pipe tele
scopically related to said setting pipe, a packing
member thereon, a setting pipe connected to said
3
adapted to have the other of said packings tele
scoped thereon during the setting operation.
13. A packer including a two part packing, a
support pipe, a setting pipe telescopically related
“port pipe and said ~setting _sleeve so that said to said support pipe, a releasable connection be
sleeve may move on said pipe to abut saidv tween said pipes, one of said parts of packing be
packers, and means on said sleeve to telescope ing on each of said pipes and spaced apart where
by the pipes and packing parts are relatively ro-l
under said support pipe packer.
4. A packer including a support portion, a tatable without affecting said packing during the
10
releasing of said connection.
10 setting portion telescopically related to said sup
sleeve, a releasable connection between said sup
port portion, and a wrapped fabric packing on
each of said portions to abut together to be col
lapsed upon relative movement of said portions.
5. A string of pipe to be set in a well, a packer
15 incorporated in said string, a pair of relatively
movable pieces of pipe in said string, a screw off
connection between said pieces, a fabric packing
of layers on each piece of pipe to abut against
each other when said pieces are telescoped after
said connection is screwed oii‘. '
6. A packer tg be incorporated in a long string
of pipe comprisiiìßgaäsupport portion, a setting
portion telescopically‘related to said support por
tion, a separate> packing on each portion, both of
25 which are~ to be collapsed by movement of said
portions, a releasable connection between said
portions, and co-engageable shoulders carried by
said portions to carry the weight of the string of
pipe after the packer has been set.
7. In _a packer, a support pipe, a setting pipe
30
telescopically related to said support pipe, a seal
ing material to be compressed upon setting of
the packer to form a seal between said pipes, and
interengaging means on said pipes to support the
weight of the setting pipe independently of said
seal.
8. The combination in a screw oiï packer struc
ture of a two-part packing to seal the outside of
said structure, a screw-off connection, and a
40 sealing material to seal against leakage through
said structure.
9. A telescoping packer comprising a support
pipe, asetting pipe, a packing portion' on each
of said pipes, and an additional packing arranged
45 between said pipes, and a screw-off connection
between said pipes so that on telescoping of the
pipes all three packings will be compressed. '
10. A packer to be incorporated in a long string
« of pipe comprising, a support portion, a setting
portion telescopically related to said Supporti
portion, a threaded screw-off connection for said
portions, a packing to be collapsed by movement
of said portions, co-engaging shoulders carried
by said portions to carry the weight of the string
55 of pipe vafter the packing has been set,- and a
seal between said portions to be set upon engage
ment of said shoulders.
`1,1.A packer including a support portion, a
setting portion telescopically related to said sup
60 port portion, said portions being relatively rotat
14. A packer comprising a setting pipe, a sup
port pipe telescopicallyv related with and releas
ably connected to said setting pipe, said pipes
being relatively rotatable to release said setting
pipe from said support pipe for longitudinal 15
movement, a two part packing one part being
positioned on each of said pipes and spaced from
the other part whereby said packing parts are
unaffected by the rotation of said setting pipe.
15. The combination of a setting pipe with a 20
packing thereon, a support pipe telescopically
related to said setting pipe and with a packing
thereon, a screw-off connection between said pipes
normally spacing said packing apart but releas- .
able to allow- relative longitudinal movement of 25
said pipes to abut said packing for expansion
thereof.
‘
16.\A packer construction wherein the parts
are relatively rotatable to set the packing without
causing twisting of the packing during rotation 30
comprising a support pipe, a setting pipe, a screw
off connection between said pipes, a packing
portion on each pipe which portions are spaced
apart during rotation and adapted to be ex
panded upon longitudinal movement of said 35
pipes.
1'7. A packer including a support pipe, av setting
sleeve telescoped over said pipe, means' to con
nect said sleeve and pipe, a packer between said
sleeve and pipe, a seal member inside of said 40
sleve to normally form a seal between the sleeve
and pipe before the packer is collapsed, said
means being releasable to collapse said' packer,
and interengageable parts on said sleeve and
pipe to cause said seal member to form a seal 45
when the packer is set.
.
18. A packer including a support pipe, a setting
sleeve telescoped over said pipe, means to con
nect said sleeve and pipe, a packer between said`
sleeve and pipe, a seal member inside lof said 50
sleeve to normally form a seal between the sleeve
and pipe befôre the packer is collapsed, saidmeans being releasable to collapse said packer,
interengageable parts on said sleeve and pipe to
support the weight of the pipe when the packer 55
is set.
.
19. In- a. telescoping packer a support pipe for
the packing, a gland thereon, a seal >ring on said
gland, a compression plate above said seal, and
means to hold said plate and seal ring against4 60
able, and a packing on each of said portions to said gland.
20. In a packer a support pipe for the packing,
abut together to be collapsed upon relative longi
tudinal movement of said portions, but which a gland thereon, a seal ring on said gland, a
are capable of relative rotation of said portions compression plate above said seal, means to hold
before setting without distorting either of said said plate and seal ring against >said gland, a- 65
packings, and a screw-off vconnection between ' setting member telescopically related to said sup
said portions releasable to effect setting of said port pipe, and a releasable connection between
said gland and said member to allow setting of
packings.
_
12. A packer including a two part packing, a said packer.
t
.
LESLIE.- A. LAY‘NE.
70
support
pipe,
a
setting‘pipe
telescopically
related
70
ALBERT L. ROCO.
to said support pipe, one part of said packing be
HAROLD C. BLOCK.
ing fixed to each pipe, a tapered yend fixed on said
setting pipe underlying one of said packings and
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