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Патент USA US2576897

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Nov. 27, 195]
2,576,893
J. w. STEWART, JR
GAUGING AND SAMPLING WELL FOR VESSELS
Filed June 26, 1950
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Patented Nov. 27, 1951
2,576,893
UNITED STATES PATENT
OFFICE
2,576,893
GAUGING AND SAMPLING WELL FOR
VESSELS
James W. Stewart, Jr., Dinuba, Calif‘.
Application June 26,‘ 1950, Serial No. 170,280
8 Claims. (01. 220-45)
2
This invention relates to a gauging and thief
which is flowed into the tank from the gather;
ing, lines leading ‘from one or more producing
ing well for liquid containing vessels, for example,
stock storage and similar tanks containing liq
wells.
uid hydro-carbons that are subject to vaporiza
tion.
Such tanks include an annular wall 3, a
closed bottom ii, and a top 5, which is provided
with a gauging and thie?ng hatch B. The hatch
‘In vessels of, this character vapors accumulate
within a vapor space in the top of the tank where
they remain under slight pressure until a fall in
temperature causes them to condense and fall
E3 includes a collar "i that encircles an opening
8 in the top‘ 5 and is provided with an annular
flange 9 for-seating a cover Hi. The cover It!
is'connected with the collar 1 by a hinge 7H and
back into the liquid. Since‘ these vapors are val- " ‘ is retained in closed position on the ?ange 9_ by
uable, it is desirable to prevent their escape when
a latch iii. A suitable gasket 53 is provided with
gauging depth of the liquid and’ taking samples
in an annular groove 14 in the under side of the
thereof. These operations are eiiected through
cover as shown in Figs. 2 and 3.
a’ thief hatch that is normally closed, but which
_When the liquid hydro-carbon contained in a
tank is to be discharged into a purchaser's pipe
line, it is necessary‘ for the “gauger” to open the
hatch and gauge the depth of the liquid hydro
carbon so that the volume of oil in the tank may
must be opened for gauging and thie?ng puré
poses with the result that the accumulated val
pors escape through the‘ hatch.‘ The vapors are
not only'lost', but being highly in?ammable, seri
ous ?res and explosions may result.
I v ‘
‘It is therefore a principal object of the pres
2O
be “calculated. It is also necessary to obtain
samples of the liquid at different elevations with
ent ‘invention to provide such tanks or vessels
in the tank to determine the quality of the liquid.
with a gauging and thie?ng well that is normally
in connection with the vapor andrliquid- contain
ing portions of the vessel when" the hatch is closed‘
to permit ?lling and equalization of pressures,
Prior to the present invention, opening of the
hatch resulted in loss of the vapors contained
in the vapor space l5 provided in the upper por
and, which, is provided with means for closing
viding the vessel with a gauging and thie?ng well
Hi which comprises a tubular pipe or duct I‘!
said’ connections when the hatch is opened there
by preventing escape of the vapors.
,
Other objects of the invention are to provide
a gauging and thie?ng well that is of simple con- >
struction, positive in operation, and which per
mits accurate gauging and sampling of the liquid.
-In accomplishing these and other objects of
the invention as is hereinafter pointed out, I
have provided improved ‘structure, the preferred .
form of which is illustrated in the accompanying
drawing wherein:
tion‘ of the tank. This is accomplished by pro
having its upper end mounted within the open
ing 8 and its lower end depending to near the
bottom ll. The upper end of the pipe is connect
ed with the roof 5 and/or hatch collar ‘I so as
to form a seal with respect to the vapor space
it while the lower end of the pipe is supported
from’ the side wall 3 by a bracket arm l8. ‘ The
bracket arm I8 is connected with a coupling I9
that may be threaded or other wise attached to,
the lower‘end of the pipe as indicated _at,2?
Fig. 1 is a vertical section through one side
of a vessel or tank equipped with a gauging and
and which preferably carries a closure cap 2! so
as to form a bottom for the well. In the illus
thie?ng well embodying the features of the pres~
trated instance, the closure cap is shown as con
ent invention, the hatch being ‘closed ‘and the
nected with the‘ coupling by a threaded connec
valve collars in position for opening the inlet
ports to the Well.
Fig. 2 is an enlarged vertical section through
the gauging and thie?ng well, the hatch cover
being shown in an open position and the valve
tion 22 as clearly shown in Fig. 2.
collars in closing relation with the inlet ports.
Fig. 3 is a fragmentary section through the
gauging and thie?ng hatch showing the lugs
thereon depressing the valve collar assembly from
covering relation with the inlet ports.
Fig. 4 is a cross section on the line 4-4 of Fig. 2'.‘
Referring more in detail to the drawings:
vl designates a vessel such as a stock tank for‘
containing liquid hydro-carbon’ indicated at 2,
p
,
Thevwell is thus vertically supported within
the tank in axial alignment with the opening
»8‘ of the hatch collar so that when the hatch
cover is open, the hatch and thie?ng operations
may be carried on within the well.‘ In order to
?ll the well with the liquid in the vessel and
establish like conditions therein, the pipe I‘! is
provided with vertically spaced series of inlet
openings 23, 24, 25, and 25, each series of open
ingsv ‘being arranged circumferentially in the
pipe.
‘
It isobvious that the liquid entering the vessel
‘will also ?ll the well so that the accumulating
2,676,893
liquid within the well will have the same char
acteristics as the liquid at corresponding levels
within the tank. Therefore, sampling the liquid
from the well gives the same samples as if they
were taken directly from the liquid in the vessel.
The upper series of inlet openings which are in
connection with the vapor space of the vessel
also allow for equalization of pressures in the
vessel for maintaining the same hydro-static
level so that the gauging may be accurately car
ried on within the well.
To prevent loss of Vapor through the inlet
openings that are in connection with the vapor
space IS, the pipe I‘! is provided with valves
which are shown in the form of collars 21, 28,
‘29, and 30 that are slidable on the pipe and
which are retained in a spaced relation corre
sponding to spacing of the series of ports by
the liquid in the tank.
With this height and
knowing the capacity of the tank and displace
ments therein, the quantity of liquid may be
readily calculated. If samples of the liquid are
required, they may be taken by lowering a
sampler through the open hatch and taking
samples at the desired levels in accordance with
the usual practice. After the sampling or gaug
ing operations are completed, the open hatch
10 cover is swung to a closed position to e?ect
simultaneous movement of the valve collars into
uncovering relation with the inlet ports to the
well.
It is obvious that openings may be provided to
allow inlet of tank ?uids into the well at any
level and the number of series and size may be
changed to suit the particular vessel and sam
pling practices and the type of ?uids normally
collected in the vessel.
means of tie rods 31. Each collar is preferably
From the foregoing it is obvious that I have
of substantial channel-shaped cross section to
provided a simple and relatively inexpensive ap
provide a web portion 32 that encircles the inlet
paratus through which a liquid containing vessel
openings of a respective series of inlet ports and
may be gauged or samples taken without per
to provide circumferential ?anges 33 and 34 for
mitting loss of any of the vapor accumulated
connection of the tie rods 3|. The ends of the
within the vapor space of the vessel.
tie rods may extend through openings 35 of the
I claim:
?anges and are connected therewith by nuts 36
1. In a vessel for containing a volatile liquid
and 31 that are threaded on the ends of the
and having a hatch forming a gauging and
rods and retained in clamped contact with the
sampling opening and provided with a cover for
respective sides of the ?anges as best shown
in Fig. 2.
30 closing said opening, a vertical duct within the
vessel and having connection with the hatch, said
When thus connected, the valve collars are
duct having a lateral port in connection with
adapted to be moved as a unit into and out of
vapor space in said vessel and having a lower
closing relation with the inlet ports responsive
to action of a spring 38 upon opening and closing
inlet for admitting liquid from the vessel into
of the hatch cover 6. The spring 38 is shown as
coiled about the pipe H and has one end en
gaging a stop 39 and its upper end seating
said vertical duct, a valving member for the
lateral port, and means for shifting the valving
member relatively to said lateral port responsive
to opening and closing of the hatch cover.
against the ?ange 34 of for example the lower
valve collar 39 as shown in Fig. 2 so that the
spring supports the collars in closing relation
with the respective series of inlet ports when
the hatch cover is open.
In order to move the collars in opposition to
the coil spring 38 and eifect opening of the inlet
ports when the hatch is closed, the upper ?ange
33 of the uppermost valve collar 21 carries pins
40 and 4| that are connected similarly to the
tie rods and which are slidably supported in
2. In a vessel for containing a, volatile liquid
having a hatch collar forming a gauging and
sampling opening and provided with a cover for
closing said opening, a tube connected with the
hatch collar and depending within the vessel,
said tube having a lateral port in connection with
vapor space in said vessel and having a lower
inlet for admitting liquid from the vessel, a
valving member for the lateral port, and means
connected with the valving member and slidable
through the hatch collar for engagement by the
openings 42 and 43 of the hatch collar 1 as shown
in Fig. 2. The pins are of a length to project 50 hatch cover when the cover is closed for retain
ing the valving member out of closing relation
a su?icient distance above the seating flange 9
with the lateral port.
so that when the cover In is closed the pins are
3. In a vessel for containing a volatile liquid
engaged thereby and moved downwardly to shift
and having a hatch forming a gauging and
the valve collars from covering relations with
the inlet ports as shown in Fig. 1. Thus, when 55 sampling opening and provided with a cover for
closing said opening, a tube depending from the
hatch opening into said vessel and having verti
cally spaced series of lateral ports in connection
with the vessel for admitting liquid and vapor
sponding with the liquid in the vessel and main
tenance of the same hydro-static head.
60 to said tube, valving members for said ports,
means inter-connecting the valving members,
In gauging a tank equipped with gauging and
and means connected with the valving members
sampling well constructed and assembled as de
and engageable by the cover for shifting the
scribed, the hatch cover I0 is opened. During
valving members relatively to said ports respon
opening of the hatch, the spring 38 acting under
the ?ange 34 of the collar 30 eifects movement 65 sive to the movement of the cover.
4. A gauging and sampling well for vessels con
of all the valve collars in closing relation with
taining volatile liquids including a tube adapted
the inlet ports so that the liquid in the well is
for vertical support in a vessel and having an
isolated from the liquid and vapor space within
open upper end and provided with inlet ports ar
the vessel. Closure of the inlet openings that
are in connection with the vapor space prevents 70 ranged at different levels along the height of said
tube, valving members, means movably support
loss of any vapors through the hatch opening
ing the valving members for movement to and
while the gauging and sampling is being effected.
from said ports, means for shifting the valving
In gauging the liquid a suitable gauge rod is
members in a direction to close said ports, a
lowered through the hatch and into the liquid
trapped within the well to obtain the height of 75 hatch at the upper end of the tube having a
the hatch is closed, the ports provide connections
between the interior of the vessel and the well
to assure ?lling of the well with liquid corre
2,576,893
cover for closing the open upper end of the tube,
and means connected with the valving members
and engageable with the cover for shifting the
valving members from covering relation with said
ports when the cover is closed.
5. A gauging and sampling well for vessels con
taining volatile liquids including a tube adapted
for vertical support in the vessel and having an
open upper end and provided with vertically
position for shifting the valving collars out of
covering relation with said ports.
7. In a vessel for containing a volatile liquid
and having a hatch forming a gauging and
sampling opening and provided with a cover for
closing said opening, a tube depending within the
hatch opening and having lateral ports in con
nection with the vessel for admitting liquid and
vapor to said tube, a bracket carried by a wall
spaced inlet ports, valving collars having sliding 10 of
the tank for supporting the lower end of the
support on the tube to open and close said ports,
tie rods connecting the valving collars, a coil
spring on said tube having one end engaging one
tube, valving members for said ports, means
inter-connecting the valving members, and
means connected with the valving members and
of the valving members to normally retain the
engageable by the cover for shifting the valving
valving collars in closing relation with said ports, 15 members out of covering relation with said ports
a hatch at the upper end of the tube having a
cover for closing said open upper end, and means
between the upper valve collar and the
hatch cover for shifting the valve collars out of
covering relation with said ports when the hatch
cover is closed.
6. A gauging and sampling well for vessels con
taining volatile liquids including a tube adapted
for vertical support in the vessel and having an
open upper end and provided with vertically
spaced inlet ports, valving collars having sliding
when the cover is closed.
8. In a vessel for containing a volatile liquid
and having a hatch forming a gauging and
sampling opening and provided with a cover for
20 closing said opening, a tube depending within the
hatch opening and having lateral ports in con
nection with the vessel for admitting liquid and
Vapor to said tube, a bracket carried by a wall
.of the tank for supporting the lower end of the
25 tube, valving members for said ports, means
inter-connecting the valving members, means
support on the tube, tie members inter-connect
connected with the valving members and engage
ing the valving collars to provide a shiftable
able by the cover for shifting the valving mem
unit, a coil spring engaging said unit to normally
hers out of covering relation with said ports when
retain the unit in position for the valving collars 30 the cover is closed, and a spring for moving the
to close said ports, a hatch at the upper end of
valving members into closing relation to said
the tube having a cover for closing said open
ports when the cover is opened.
upper end, and means connected with said unit
JAMES W. STEWART, JR.
and having support in the hatch to be engaged
by said cover when the cover is moved to closing
No references cited.
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