Packer for Wells Page: 2 of 3
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UNITED STATESPATENT OFFICE.
WALTER WILLIAM FONDREN, OF HOUSTON, TEXAS.
PACKER FOR WELLS.Specification of Letters Patent. Patented June 28, 1921.
Application filed January 10, 1921. Serial No. 436,293.To all whom it may concern:
Be it known that I, WALTER WILLIAM FON-
DREN, a citizen of the United States, residing
at Houston, in the county of Harris and
5 State of Texas, have invented certain new
and useful Improvements in Packers for
Wells, of which the following is a specifica-
tion.
This invention relates to new and useful
10 improvements in a packer for wells.
The object of the invention is to provide
a device of the character described, which is
particularly adapted for use in oil wells, and
whereby a water tight joint may be formed
15 between an outer and an inner pipe.
The packer is interposed between oil and
water strata to prevent the mingling of
water with the oil, and is also used to force
the oil to enter the pipe through the screen
20 or strainer, and to prevent the same from
passing up between the pipe and the well
casing. The device herein described may be
used anywhere it is desirable to form a joint
between an inner and outer pipe.
25 With the above and other objects in view,
the invention has particular relation to cer-
tain novel features of construction, arrange-
ment of parts and use, an example of which
is given in this specification and illustrated
30 in the accompanying drawings, wherein:- -
Figure 1.is a sectional view of the packer
in position to be set, and
Fig. 2 is a sectional view, showing the
packer set and in position to. case off water
35 and prevent the passage of fluid between the
outer casing and the inner pipe.
Referring now more particularly to the
drawings, wherein like numerals of reference
designate similar parts in each of the fig-
40 ures, the numeral 1 refers to a casing, which
is set in a well bore. When the well bore
has been completed, as is well known to
those familiar with the art of oil well drill-
ing, a strainer or screen is set in the oil bear-
45 ing strata at- the bottom of the bore. This
screen has not been shown in the drawings,
but may be attached to the lower end of the
pipe section 2. The upper end of this sec-
tion is outwardly threaded as at 3, and sur-
50 rounding the lower end thereof; is a collar 4,
which is fixed thereon by means of -a set
screw 5. Threaded over the upper end of
the section 2 is the sleeve 6, and interposed
between said sleeve and collar is a packer
55 ring 7, preferably formed of lead, or some
other soft metal. When the sleeve 6' isscrewed down onto the section 2, it will cause
the packer ring 7 to bulge outwardly against
the casing all around the section 2, forming
a water tight joint. For the purpose of ap- 60
plying the packer ring, I have provided the
upper and lower collars 8 and 9, which are
connected by means of the nipple 10, said
collars being screwed onto the respective
ends of said nipple by means of right hand 65
threads, and the lower end 11 of the collar 9
has external left hand threads, adapted to
be screwed in the corresponding threads 12
in the upper end of the section 2. A pair of
oppositely disposed dogs 13, 13 are provided 70
which are interposed between the collars 8
and 9 and whose respective ends have the
fingers 14 and 15, which have the required
radial movement in radially extending slots,
cut in the adjacent ends of the respective col- 75
lars 8 and 9. These dogs are seated on the
respective springs 16, 16, interposed between
them and the nipple 10. The device is first
assembled into the position shown in Fig. 1,
and then attached to a pipe by means of 80
which it is let down into the well casing to
the desired point. The pipe is then rotated in
the usual direction, causing the collar 9 to un-
screw from the section 2. The pipe is then
lifted a short distance, elevating the collars 85
8 and 9 until the dogs 13 clear the upper end
of the elevator 6. The dogs are then forced
outwardly by the spring 16, and project be-
yond the collar 8, as shown in Fig. 2. A ro-
tation of the pipe will cause said dogs to 90
aline with the opposing notches 17, 17, pro-
vided in the upper end of the sleeve 6, and
said dogs will drop into said notches and a
further rotation of the pipe will operate to
rotate the sleeve 6, and it will be screwed 95
downwardly onto the section 2, forcing the
packer ring 7 out against the casing, as
shown in Fig. 2, thereby forming a water
tight joint in the manner shown, and for the
purposes hereinabove explained. When the 100
packer has been set, the device may be then
withdrawn from the well, if it is so desired.
What I claim is:-
1. A device of the character described, in-
cluding a pipe section, a packer surrounding 105
the same, a sleeve threaded onto said sec-
tion and adapted to abut against said packer
to expand the same, a rotatable member fit-
ted within the sleeve and capable of being
connected with and disconnected from said 110
pipe section, radially movable dogs carried
by said member, yieldable members operat-1,382,770.
:,
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Fondren, Walter William. Packer for Wells, patent, June 28, 1921; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1257248/m1/2/: accessed July 1, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.