Core-Barrel. Page: 2 of 4
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UNITED STATESPATENT OFFICE.
GRANVILLE A. HUMVASON AND WILLIAM L. CHILDS, OF HOUSTON, TEXAS.
CORE-BARREL.1,318,493.
Specification of Letters Patent.
Patented Oct. 14, 1919.
Application filed September 17, 1918. Serial No. 254,424.
To all whom it may concern:
Be it known that we, GRANVILLE A. HUMA-
SON and WILLIAM L. CHILDS, both citizens
of the United States, residing at Houston,
5 Harris county, Texas, have invented a cer-
tain new and useful- Improvement in Core-
Barrels, of which the following is a full,
clear, and exact description, such as will
enable others skilled in the art to which
10 it appertains to make, and use the same.
Our invention relates to core barrels for
use in connection with core drilling appa-
ratus. It has reference' particularly to core
barrels used in rotary drills in drilling oil
15 or water wells, or in prospecting where a
continuous log of the well is required. It
is contemplated in our invention to receive
the upwardly extending column of mate-
rial, constituting the core left by the drill,
20 in a specially constructed tube or barrel
wherefrom it may be easily extracted. A
common trouble experienced in drilling with
a core drill is that the core of material will
sometime become wedged in the core barrel
25 and become difficult, or practically impos-;
sible, to extract therefrom without the use'
of specially constructed means and the loss
of a good deal of valuable time.
'0 aAn object of our invention is to provide
30 a core'barrel which may be divided longi-
tudinally in such manner as to release the
core therein without difficulty, by means of
taking the barrel apart.
Another object is to construct a core bar-
35 rel of the character described which may be
firmly joined together to maintain the parts.
in close and rigid contact.
Other objects and advantages of our im-
provement will become apparent from a
40 reading of the specification, which follows.
and will be pointed out with more particu-
larity in the claims.
Referring to the drawings forming a part
of this specification and wherein like numer-
45 als are applied to like parts throughout the
several views, Figure 1 is a side elevation,
partly in section, of a drill to which our
invention is applied. Fig. 2 is a transverse
section on the 'line 2-2 of Fig. 3; 'Fig. 3
50 is a broken detail, partly in. 'section, show-
ing a means of coupling different .sections
of our core barrel together. Fig. 4 is a cross
section of our invention illustrating one
means of joining the longitudinal parts to-
55 gether. Fig. 5 is a similar view illustrating
another modification of our invention,In Fig. 1, we have shown our invention
in position within the drill stem and at-
tached to a drill. The drill used may be
any ordinary type of core drill and the one 60
we have shown is an improved core drill,
which is covered in a co-pending applica-
tion No. 254,397 filed Sept. 17, 1918 for pat-
ent. It consists of a head 1, having a re-
duced upper shank 2 for connection with a 65
drill stem 4, said connection being made in
this modification by an ordinary coupling
or drill collar 3. At the lower end of the
bit are two outer, cutters 5, inclined out-
wardly for the purpose of cutting a clear-' 70
ance for the drill; and' two inwardly in-
clined cutters 6, cutting a clearance about
the core formed in the drilling operation.
The core extends upwardly as the drill
progresses downwardly and is received in 75
our improved core barrel 7. This core bar-
rel is divided longitudinally into two parts
held together at the lower end by being
threaded interiorly into the drill head and at
the upper end by a cap 8 threaded on to the 80
core barrel. This cap has a valve 9 ar-
ranged to open upwardly against the ac-
tion of a spring 13 thereon. This spring
is an ordinary spiral spring arranged
around a downwardly extending stem 11, 85
and bearing at its upper end against the
lower face of the cap 8, and, at its lower
end, against the enlarged head 12 of said
stem: By means of said spring, and also
through the weight of the valve itself, the 90
valve is held within a semi-spherical seat
10. The upper surface of the valve is coni-
cal in shape for the purpose of better di-
verting any sediment or accumulation of
material which might form above the valve. 95
Upwardly extending passages 23 through
the cap 8 provide a vent fori water or air
accumulating in the upper end of the barrel.
These' passages are ordinarily closed by the
valve, but it is apparent that an excess of 100
pressure- below the valve through the pas-
sages 23 will unseat the valve sufficiently
to allow the outward passage of the fluid in
the barrel.
As a further means of securing the two M5
longitudinal parts of the core barrel to-
gether, we may provide outstanding flanges
15, at occasional intervals along the sides
of the two parts, through which may be
passed a bolt, secured in place by a nut 16, 11I
by means of which the two parts may be
drawn together in rigid' contact. Instead of
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Humason, Granville A. & Childs, William L. Core-Barrel., patent, October 14, 1919; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258631/m1/2/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.