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Патент USA US2096739

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Oct. 26, 1937.
A. H. FLETCHER
2,096,739
VVACUUM RELEASE COLLAR
Filed Oct. 1, 1936
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239639
Patented Oct. 26, 1937
UNITE
rut 0mm
STA 'i1l'l
2,096,739
VACUUM RELEASE COLLAR
Allen H. Fletcher, Bakers?eld, Calif, assigncr to
Fletcher Oil Well Desander Corporation,
Bakers?eld, Calif” a corporation of California
Appiication October 1, 1936, SerialNo. 103,611
5 Claims.
(01; rec-19)
disclosed in Patent #I,Q58,915 although they may
This invention relates to a vacuum release col
lar to be mounted upon the upper end portion of
a plunger of a vacuum sand bailer or the like, and
it is ‘primarily an object of the invention to pro
5 vide means for the release automatically of ex
cessive vacuum which would make the bailer un
duly adhere to any hard or solid formation which
be otherwise constructed.
would otherwise result in sticking.
It is also an object of the invention to provide a
10 device which operates automatically to obviate
any sticking or suction adhesion of the bailer
when the pull exerted on the sand line reaches a
safe and predetermined maximum thus prevent
ing breaking of the sand line and avoiding the
15 necessity of a ?shing job with the possible loss
of the bailer.
>
The invention has for another object to provide
20
a release collar embodying means whereby the
bailer can be released with a good margin of
safety for varying sizes of lines and also for
Varying conditions of same.
The invention consists in the details of con
struction and in the combination and arrange
ment of the several parts of my improved vac
25 uum release collar whereby certain important ad
vantages are attained and the device rendered.
simpler, less expensive and otherwise more con
venient and advantageous for use, as will be
hereinafter more fully set forth.
The novel features of my invention will herein
30
after be de?nitely claimed.
In order that my invention may be the better
understood, I will now proceed to describe the
same with reference to the accompanying draw
35 ing, Wherein:—
Figure 1 is an enlarged fragmentary view part
ly in section and partly in elevation illustrating
a vacuum release collar constructed in accord- V
ance with an embodiment of my invention in ap
40 plied position upon a bailer plunger;
Figure 2 is a longitudinal sectional view taken
through the collar and the parts directly asso
ciated therewith.
7
As disclosed in the accompanying drawing, P
45 denotes a tubular plunger or piston of a general
'
r
I
'
My improved vacuum release collar comprises
an elongated tubularmember l which in prac
tice is preferably about two .feet in‘ length;
Threading into‘the lower end portion of this
. tubular member I is a hollow nut '2.,the lower
marginal portion of which-being provided with
the opposed notches v3 whereby a suitable wrench
may be engaged with the nut 2 for applying or 10,
removing the same or for adjusting the nut into
or out of the member I as may be desired.
The inner or inserted end of the nut? pro
vides an annular seat 3' for a coil spring 4. This
spring t is preferably made of ?at steel material 1-5
and about five inches in length. This spring 4
surrounds a hollow mandrel or stem 5 of a di
ameter less than the internal diameter of the
tubular member l and the upper portion of this
mandrel 5 is formed with a head 6. The head 6 20
at its inner end is outwardly enlarged with re
spect to the mandrel or stem 5 whereby is provid
ed an annular shoulder ‘l with which the spring 4
also engages. The head 6 immediately adjacent
to the shoulder 1, as at 8, is straight to provide
an annular guiding surface for the mandrel or
stem 5 for coaction with theinner face of the
member | to assure the maintenance of the man
drel or stem 5 in desired position. Above or out
wardly of the straight surface 8, the head 6 is in 30
the form of a truncated cone as illustrated at 9
with the central or apex portion open.’ This
opening 5 ii is of a diameter less than the diameter
of the major portion of the bore ll of the'man
drel or stem 5 with the portion of the bore of the
mandrelor-stem 5 within’ the head 6 tapering,
as at l2, toward this-opening l0.
'
The wall de?ning the opening H] is formed to .
provide a seat M with which has close contact
a ball valve l5.
'
~ I
40
The upper portion of the applied member I in
the present embodiment'of the invention has its
bore slightly reduced to provide an internal annu
lar shoulder 25 which is contacted by the mar
ginal portion of a disc l1. This disc l‘! is prefer
type employed in connection with de-sanding or
ably pressed into- the member I and against the
general construction and operation of the plung
the peripheral wall of the conical portion 9 is
normally maintained in engagement with the
seat disc I‘! under the action of the spring 4. It
is to be particularly noted that the opening I8 is
shoulder l6. This applied disc I‘! serves as a
bailing devices for oil wells of a vacuum type. '
seat for the mandrel or stem 5 and is provided
This plunger or piston works within a barrel B
in its central portion with an opening I8 into
which, of course, is of desired length. As the which the apex portion of the head 6 extends and
er or piston P and barrel B are well known a de
tailed description and illustration thereof is be
lieved to be unnecessary. It may be added that
55 these parts are substantially the same as what is
of a diameter in excess of the diameter of the 55
2
2,096,739
ball valve l5 so that the ball valve can raise and of a vacuum bailer, said collar comprising a tubu
lower without hindrance or obstruction with the lar member, a normally closed valve therein, said
suction action of the bailer.
valve moving to open position to release the vac- '
The upper portion of the member I has thread
uum created by the piston upon undue resistance
ed therein or otherwise coupled thereto a rope
being offered to the suction stroke of the piston,‘
socket or bail l9.
said valve. being tubular and open at both ends,
Should the bailer adhere unduly hard to any ' and means for normally closing the bore of the
formation or thing in the well, the operating rope valve.
or wire for the bailer often parts resulting in a
3. As a new article of manufacture, a vacuum
?shing job and often resulting in the total loss of release collar for attachment to a tubular piston
the bailer. However, with the "improved vacuum of a vacuum bailer, said collar comprising a tubu
release. collar the pull of the sand line will over
lar member, a normally closed valve therein, said
come the tension of the spring 4 and force the valve moving to open position to release the vacu
ball l5 downward together with the mandrel or um created by the piston upon undue resistance
being offered to the suction stroke of the piston, 15
15 stem 5. This movement places the spring 4 under
increased tension. The slightest downward move
means, for maintaining the valve in its normally
ment of the mandrel or stem 5 creates an open
closed position, said valve being tubular and open
ing between the portion 9 of the head 6 and the at both ends, a’ disk ?ttedwithin and intersecting
disc I‘! immediately releasing the vacuum created
20 by the suction action of the bailer. This release
of the vacuum results in an immediate letting
7 go of the hold the bailer may have on the forma
tion or anything in the well.
The. tension of the spring 4 may be adjusted
25 upon proper turning of the nut‘ 2 so that the
bailer can be set to release with a good margin of
safety for varying sizes of lines and also for vary
ing conditions of same.
From the foregoing description it is thought
30 to be obvious that a vacuum release collar con
structed in accordance with my invention is par
ticularly well adapted for use by reason of the
convenience and facility with which it may be
assembled and operated, and it will also be ob
35 vious that my invention is susceptible of some
change and modi?cation without departing from
the principles and spirit thereof and for this rea
son I do not wish to be understood as limiting my
self to the precise arrangement and formation of
40 the several parts herein shown in carrying out
my invention in practice except as hereinafter
claimed.
I claim:—
1. As a new article of manufacture, a vacuum
45 release collar for attachment to a tubular piston
of a vacuum bailer, said collar comprising a tubu
lar member, and a normally closed valve therein,
said valve moving to open position to release the
vacuum created by the piston upon undue resist
50 ance being offered to the suction stroke of the
piston, said valve being tubular, and a valve mem~
ber coacting with the upper end of the tubular
valve normally closing the tubular valve against
?ow therethrough.
2. As a new article of manufacture, a vacuum
releasecollar for attachment to a tubular piston
the bore of the tubular member, said disk having
a central opening for registerrwith the bore of
the valve, said disk providing a valve seat for the
valve, a ball valve extending through the opening,
of the disk andnormally seating upon the adja
cent end of the ?rst valve to close the bore of said
25
?rst valve.
4. As a new article of manufacture, a vacuum
release collar for attachment to a tubular piston
of a vacuum bailer, said collar comprising a tubu
lar member, a normally closed valve therein, said
valve moving to open position to release the‘ vac 30
uum created by the piston upon undue resistance
being offered to the suction stroke of the piston,
means for maintaining the valve in its normally
closed position, said valve being tubular and open
at both ends, a disk ?tted within and intersect 35
I ing the bore of the tubular member, said disk hav
ing a central opening for register with the bore
of the valve, said disk providing a valve seat for
the valve, a ball valve extending through the
opening of the disk and normally seating upon 110
the adjacent end of the first valve to close the
bore of said ?rst valve, the opening in the disk
being of a diameter to allow the ball valve to
pass therethrough upon separating movement be
tween the ?rst valve and the disk.
’
5. As a new article of manufacture, a vacuum
45
release collar for attachment to a tubular piston
of a vacuum bailer, said collar having an internal
valve seat, a tubular valve, yieldable means for
normally holding the valve to the internal seat, 50
said valve moving to open position to release the
vacuum created by the piston upon undue resist- '
ance being o?ered to the suction stroke of the
piston, and means for‘ normally closing thetubu
lar valve against ?ow therethrough.
ALLEN H. FLETCHER.
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