close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3058537

код для вставки
Oct. 16, 1962
c. c. DOUGLASS ETAL
TUBING ANCHOR
Filed April 7, 1960
3,058,526
\
2 Sheets-Sheet 1
24a
24b
22
20
INVEN TORS.
CHARLES C. DOUGLASS
BQ'OBERT T. E VANS
wlwmQy
Oct. 16, 1962
c. c. DOUGLASS ET AL
3,058,526
TUBING ANCHOR
Filed April 7, 1960
24b
240
INVEN TORS.
CHARLES C. DOUGLASS
B€0BERT T. E WW5‘
WW
United grates
"ice
3,058,526
Patented Oct. 16, 1962
2
1
TUBING ANCHOR
3,053,525
casing 10 and the block 17 acting on the slips 18 when the
tubing 11 is lowered in the casing 10.
It will be observed that the lower end of the sleeve 14
Charles C. Douglass, Tioga, N. Dak., and Robert T.
abuts against a shoulder 19 on the mandrel 12. Thus the
Evans, Duncan, Okla, assignors to Halliburton Com- 5 blocks on sleeve 14 and mandrel 12 cannot be brought
pany, a corporation of Delaware
any closer together than shown in FIGURE 1. However
by rotation of mandrel 12 to the right (as viewed from
above) the spreader blocks 16 and 17 may be separated
further, if the sleeve 14 is held against rotation.
This invention relates to tubing anchors for use in oil
The slips 18 are held in position between the spreader
wells, and more particularly to an arrangement for hold- 10
blocks 16 and 17 by a suitable cage 20‘ and drag springs 21.
ing and removing tubing in a well if, by accident, it has
Filed Apr. 7, 1960, Ser. No. 20,589
3 Claims. (Cl. 166—216)
The cage 20 consists merely of an outer cylinder pro
parted at some point above its lower end.
vided with windows in which the slips 18 are yieldably
It is common practice to use steel tubing in oil Wells.
held by leaf springs 22. '
Sometimes, due to excessive strain, or due to corrosion,
The cage 20 is provided with conventional pins 23 ex
or other factors, the tubing comes apart at some point in 15
tending into conventional J-slots 24 on the sleeve 14, so
the well. The lower portion of the tubing then falls and
that there can be only limited relative longitudinal move
is damaged, and an expensive ?shing job is then necessary
ment between the cage 20 and the sleeve 14 when the
to remove it.
parts are in the running-in position shown in FIGURE 1.
For preventing the falling of parted tubing, “catchers,”
per se, are old in the art. However, ordinary catchers are 20 As shown in FIGURES l and 5, each J-slot 24 includes
not suitable for use with slips or other latch-down devices
a ?rst generally elongate slot portion 24a extending axially
which hold the lower end of the tubing against upward
movement during normal operation.
of the anchor, a second elongate portion 24b also extend
mechanism inactive, should a ?shing job be required, so
that the parted tubing can readily be retrieved.
Other objects will be apparent from the following
description of a preferred embodiment of the invention,
when taken in connection with the accompanying draw
ings, in which:
spreader blocks and slips.
As long as the J-slot coupling is limiting relative longi
being shown in the relative positions they occupy while
tubing is being lowered into the well;
on the mandrel 12.
sisting essentially of a mandrel 12, which is connected
to the lower end of the tubing 11 by a threaded coupling
3, the slips 18 are held against downward movement by
the drag springs 21 and cage 20 until the tubing falls far
enough for the spreader block 17 to cause them to again
ing axially of the anchor, and a transversely extending
portion 24c connecting the intermediate part of portion
It is an object of the present invention to provide an
anchor for tubing used in a well which is capable of 25 241'; with portion 24a of the slot. In the running-in posi
tion, pins 23 are positioned in slot portions 24a which are
latching or fastening down its lower end, and at the same
of limited axial extent so as to restrict axial movement of
time prevent the tubing from falling, in case it parts. An
the cage 20 to thereby prevent coaction between the
arrangement is provided for rendering the latch-down
tudinal movement between the cage 20 and the sleeve 14,
neither of the spreader blocks can force the slips 18 out—
wardly. When the tubing has been lowered to the desired
point in the well at which it is desired that the lower end
FIGURE 1 is a view in vertical cross section of a por~ 35 be anchored, the tubing is rotated to the left sufliciently
to bring the pins 23 into the longer portions 24b of the
tion of an oil well with a tubing anchor constructed in
J-slots 24. This is possible because of the shoulder 19
accordance with the invention located therein, the parts
The sleeve 14' cannot move down—
wardly on the mandrel 12 upon left-hand rotation of the
FIGURE 2 is a vertical quarter section of the anchor 40 mandrel due to this shoulder. Hence the left hand torque
on the mandrel 12 is transmitted to the sleeve 14 to oper
of FIGURE 1, showing the parts in the relative positions’
ate the J-slot connector.
they occupy when the latch-down mechanism is in use
There is then a situation where either of the blocks
during normal operation of the tubing in the well;
can set the slips '18 in the casing 10, the slips being held
FIGURE 3 is a vertical quarter section of the anchor
of FIGURE 1, showing the parts in the relative positions 5 against falling by the drag springs 21 and the cage 20
while the tubing 11, mandrel 12 and sleeve 14 can be
they occupy when the tubing comes apart at some point
moved up or down with respect to the slips 18.
above the anchor;
To place the parts of the anchor in the operating posi
FIGURE 4 is a vertical quarter section of the anchor
tion shown in FIGURE 2, all that is necessary, therefore,
of FIGURE 1 showing the parts in the relative positions
which they occupy when a ?shing operation is being con- 50 is to turn the tubing slightly to the left and raise it.
When the spreader block 16 causes the slips 13 to grasp
ducted to remove the parted tubing from the well; and
the casing, tension can be taken in the tubing. This is
FIGURE 5 is an elevational view of the J-slot shown
desired, for example, when the tubing is provided with
in section in FIGURES 1-4.
a pump, and it is desired to avoid “breathing” or buckling
Referring to the drawing in detail, it will be seen that
FIGURE 1 shows a casing 10 cemented in a well bore. 55 of the tubing with each pump stroke.
Should the tubing come part, as illustrated in FIGURE
On the lower end of tubing 11, there is an anchor con
13, and an outer sleeve 14 threaded upon the mandrel 12
grip the casing.
by right-hand acme threads 15.
At its lower end, the mandrel 12 is provided with a
To remove the parted tubing from the Well, a ?shing
tapered conical wedge or spreader block 16; and at the
device, such as is illustrated at 25 is connected to the
lower end of the sleeve 14, there is a cooperating tapered
parted tubing. An attempt would then be made to rotate
conical wedge or spreader block 17.
the tubing to the right and cause the pins 23 to re-enter
Coacting with the spreader blocks are conventional slips 65 the horizontal portions of the J-slot 24. If this can be
13 which have tapered inner surfaces corresponding to
brought about, the parted tubing can be ?shed out.
those of the spreader blocks.
However, it may not be possible to effect the proper
It will be seen that the spreader blocks 16 and 17 are
actions of the pins 23 and J-slots 24-. In that event, con
so disposed as to face each other, so that either block 70 tinued right-hand rotation of the tubing will cause the
can force the coasting slips 18 outwardly, the block 16
spreader blocks 16 and v17 to separate to such a distance
acting on the slips 18 when the tubing 11 is raised in the
that the anchor can still be moved upwardly in the well.
3,058,526
3
This is brought about by the action of the acme thread 15
between the sleeve 14 and the mandrel 12.
During the right-hand rotation, the cage 20' will be held
against rotation either by the slips 18 or by the drag
springs 21. The cage 20, through the pins 23 and slots
24, will hold the sleeve 14 against rotation. The mandrel
12 is free to rotate in the sleeve 14 in a right-hand direc
4
.
sleeve such that, with said sleeve engaging said shoulder,
and said pin in said ?rst axially extending slot portion
and opposite said transversely extending slot portion, a
left hand torque applied to said mandrel to move said
pin through said transversely extending slot portion into
said second elongate slot portion will not e?fect move
ment of said sleeve on said mandrel.
3. An anchor for tubing in an oil well or the like
tion however, and since it is connected to the tubing 11,
this action can be brought about. The result is that the
comprising a mandrel and sleeve means assembly in
parted tubing and the anchor can be removed from the 10 cluding a mandrel adapted to be connected to the tubing
well regardless of the fact that the J-slot connector cannot
and sleeve means mounted on the mandrel and up
be manipulated.
While only one embodiment of the invention has been
shown and described, it is obvious that various changes
wardly movable thereon; an upwardly directed spreader
block carried by said mandrel; a downwardly directed
spreader block carried by said sleeve means above said
may be made without departing from the spirit of the 15 upwardly directed spreader block; slips for engaging
invention, or the scope of the annexed claims.
casing in the well positioned between said spreader
What is claimed is:
blocks and having upper surface means adapted to coact
I. An anchor for tubing in an oil well or the like
comprising a mandrel and sleeve assembly including a
mandrel adapted to be connected to the tubing and a
sleeve screw-threaded on the mandrel and upwardly
movable thereon; an upwardly directed spreader block
carried by said mandrel; a downwardly directed spreader
block carried by said sleeve above said upwardly di
rected spreader block; slips for engaging casing in the
Well positioned between said spreader blocks and having
with said sleeve means carried spreader block and lower
surface means adapted to coact with said mandrel car
ried spreader blocks, cage means encircling said man
drel and sleeve means assembly for holding said slips,
said cage means being slidably ‘mounted on'said assem
bly; drag springs projecting from the exterior of said
sleeve means to engage a well Wall; a J-slot connection
between said cage means and said sleeve means, said
connection including a J-slot on one of said means, said
upper surface means adapted to coact with said sleeve
J-slot having a ?rst slot portion extending axially of
carried spreader block and lower surface means adapted
said anchor, a second elongate portion extending axially
to coact with said mandrel carried spreader blocks, a
of said anchor, and a transversely extending portion
cage encircling said mandrel and sleeve assembly for 30 connecting an intermediate part of said second portion
holding said slips, said cage being slidably mounted on
and said ?rst portion; and a pin extending from the
said assembly; drag springs projecting from the exterior
other of said means into said J-slot, said pin, when in
of said cage to engage .a well wall; a J-slot on the ex
said ?rst slot portion limiting axial cage means move
terior of said sleeve, said J-slot having a ?rst slot por
ment to prevent said coaction between said spreader
tion extending axially of said anchor, a second elongate
blocks and said slips, and when moved through said
portion extending axially of said anchor, and a trans
transversely extending slot portion into said second elon
verselyr extending portionconneoting an intermediate
part of said second portion and said ?rst portion; and
a pin extending from said cage into said J-slot, said
pin, when in said ?rst slot portion limiting axial cage 40
movement to prevent said coaction between said spreader
blocks and said slips, and when moved through said
transversely extending slot portion into said second elon
gate slot portion, permitting said coaction.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,393,091
Mack ________________ __ May 6, 1919
gate slot portion, permitting said coaction.
1,653,547
2,178,999
Cameron ____________ __ Dec. 20, 1927
Scott _________________ __ Nov. 7, 1939
2. An anchor as de?ned in claim 1 in which said 45
sleeve is mounted, on said mandrel by a right hand
threaded connection and in which said mandrel is pro
vided with a shoulder beneath the lower end of said
2,247,188
2,331,532
2,589,506
2,633,201
Davis _____________ _____ June
Bassinger ____________ __ Oct.
Morrisett ___________ __ Mar.
Clark ______________ __ Mar.
24,
12,
18,
31,
1941
1943
1952
1953
Документ
Категория
Без категории
Просмотров
0
Размер файла
422 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа