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Dec. 3, 1946.
Filed July 30, 1945
‘4 15
Patented Dec. 3, 1946
John a. Bradshaw, Duncan, 0th., animal a» '
Balliburton ' Oil Well. cementing Company,
Duncan, Okla.
Application-July so, 1945, Serial No. 601,191
(Cl- 214-88)
Thi- invention relates to automotive convey
ances and more particularly to an arrangement
for transporting Portland cement in bulk from
one place to another, such as from a bulk storage
conveyors, the construction being in accordance
with the principles of the present invention;
Figure 2 is a transverse ‘cross-sectional view of
the container shown in Figure 1, the view being
plant to the site of an oil well.
taken on the line 2-4 thereof;
- ,
Until a few years ago, oil wells were commonly
cemented by conveying Portland cement‘ to the
well in sacks.
At the well a number of men were
. Figure 3 is an enlarged cross-sectional view of
one of the screw conveyors of Figure 2, ,with the
protective means mounted thereabove;
employed to open the sacks and dump the cement
Figure 4 is a perspective view of one of the
'being taken to the well and fed into the mixer
being taken on the line 5-5 of Figure 3.
Referring to the drawing in detail, it will be
seen that the frame oi an automotive trailer is
illustrated at H, the trailer being provided with _
rubber tired wheels l2. Mounted upon this
into a mixer where a slurry was made and 10 protective plates shown in Figure 3; and
'Figure 5 is a cross-sectional view across the
pumped into the well. Recently, bulk cement '
conveyances have come into use, the cement - braces supporting theprotective means, the view
by means of screw conveyors located in the lower
portion of the conveyance. In many cases, oil
wells are located in territory where the roads are
not good or in ?elds some distance from a central
bulk cement plant, or on rough ground. As a
trailer is a, container l3, preferably of welded steel ,
construction and provided with one or more man
result, Portland cement conveyed in bulk has a
tendency to pack and settle. From experience 20 holes I‘ through-which the container It may be
loaded with cement. The manholes may be pro
it has been found that screw conveyors located
vided with suitable covers l5.
in the bottom of a bulk cement conveyance can
As shown in the drawing, two screw conveyors
not be rotated when the conveyance arrives at
l6 are mounted in the bottom of the container 13.
its destination because of the packing of the
25 These preferably extend longitudinally of the
cement around them.
trailer body and terminate in a discharge spout
In accordance with the present invention it is
or chute I‘! at the rear of the trailer. A gaso
proposed to equip a bulk cement conveyance hav
line engine l8, or the like, is employed to rotate
ing one or more discharge screws in the bottom
the screws It, being connected thereto through
thereof with means for preventing the packing
of the cement around the screws while‘the cement 30 suitable chain sprockets i9 or other driving
is being transported, the protective means being
As shown in Figures 2 and 3, the lower por
so disposed as to permit it to be lifted to uncover
tion of the container i3 is provided with bame
the screws after they have started to rotate to
plates or guiding means 2! which form troughs
discharge the cement from the conveyance.
Accordingly, it is an-object of the invention to 35 in the bottom of which thescrews it are located.
In accordance with the present invention a num
provide a bulk cement conveyance in which screw
ber of inverted V-shaped braces 22'are riveted or
conveyors are employed to discharge the cement
otherwise rigidly secured to the ba?ie plates 2| at
into a mixer or hopper with a minimum 01 in
spaced points longitudinally along the screw con
convenience and with a minimum of power re
40 veyors l6. These serve to brace the baiiie plates
quired to rotate the screw conveyors.
21 and also serve to guide and support protective
It is a further object of the invention to pro- ,
plates .23 which are placed thereon.
vide means for selectively dumping portions of a
As shown in Figure 1, five pairs of protective _.
bulk cement conveyance so that di?‘erent kinds
plates 23 are provided. When the container i3
of cement may be carried in the conveyance and
45 is being loaded with cement and while the cement
discharged therefrom as desired.
is being transported the plates 23 rest upon the
Other objects reside in certain features of the
arrangement and construction of parts, as will
be apparent from the following description taken
in connection with the accompanying drawing, in
Figure 1 is a vertical cross-sectional view of an
automotive trailer provided with a bulk cement
container, conveyor screws with an engine for
driving the same and with means for preventing
braces 22 in the position shown in Figure 3, and
form a roof over the screw conveyors it, thus
preventing the cement from packing around the
50 screw conveyors.
As shown at 20 in Figure 1, a transversely ex
tending partition may be provided in the con
tainer l3. This divides the container into com
partments so that cements of different kinds may
the bull; cement from packing around the screw 55 be conveyed. For example the ‘compartment to
the right of‘the partition 23 may be loaded with
cement containing 8% bentonite, while the com
partment to the left of the partition may be
loaded with ordinary Portland cement. By rais
while the/conveyance is being moved long dis
tances or over rough roads, but in which the
cement may readily be discharged from the con
- tainer when so desired.
ing the sets of plates 23 selectively, the various
While only one embodiment of the invention
has been shown and described herein, it is obvious
that various‘changes'may be made without de
parting from the spirit of the invention or the
cements may be discharged into the screws l8
and chute I‘! as desired.
4 "
When the conveyance has reached its destina
tion and it is desired to discharge the container
, scope of the ‘annexed claim.
i3, the engine It is started and the screw con 10
I claim:
veyors It rotated. The plates 23 are then raised "
In an automotive conveyance to; cement in 1
to the position shown at the right hand side of
bulk, a container having a partition therein di
Figure 2, so as to uncover the screws l6 and per
viding the same into compartments‘, screw con
mit the cement to move downwardly. into the
veyors mountedi’or rotation in the bottom oi’ said
screw conveyors It. Any suitable means, ‘either 15 container forv discharging cement therefrom,
mechanical or hydraulic, may be employed to
baillelplates forming troughs for directing the
raise the protective plates 23. In the arrange
cement into said screw conveyors, angled braces
ment shown, a jack is employed, the screw 24 or ’ disposed above said screw conveyors 'at spaced
which is connected to the plates 23 through suit
points'therealong and connected to said baii'ie
able linkage 25. ' The jack includes a hand oper 20 plates, protective plates mounted in, pairs for
ated nut 26 swivelledi upon a base member 21
mounted on the top 28 of the container l3. As
shown in Figures 4 and 5, loose ?tting brackets
29 are secured to the'plates 23 to guide the plates
over the angled braces 22.
With the arrangement just described, it will be
apparent that provision has been made for pre-v
venting cement from packing around the screws
' sliding movement on said~ angled braces and
adapted to form roofs over said screw conveyors,
and jacks mounted on the top of said container
4017 raising said protective plates selectively'to.
permit cement from either of said compartments
to ?ow into said screw conveyors as desired.
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