Well Screen Page: 2 of 3
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UNITED STATESPATENT OFFICE.
HARRY R. DECKER, OF HOUSTON, TEXAS.
WELL-SCREEN.
979,748. Specification of Letters Patent. Patented Dec. 27, 1910.
Application filed JTune 7, 1909. Serial No. 500,482.To all whom it may concern:
Be it known that I, HARRY R. DECKER,
a citizen of the United States, residing at
Houston, in the county of Harris and State
5 of Texas, have invented certain new and use-
ful Improvements in Well-Screens, of which
the following is a specification.
My invention relates to new and useful
improvements in well screens.
10 The object of the invention is to provide
a screen of the character described that will
be of sufficient strength to admit of hard
rotation without disarrangement of the
strainer wire and spacers, and one which
15 will have a comparatively large screen sur-
face.
Another feature resides in the arrange-
ment of the parts whereby a simple and easy
construction of the screen is made possible,
20 and a simple, inexpensive and durable screen
thus produced.
With the above and other objects in view
my invention has particular relation to cer-
tain novel features of construction, and ar-
25 rangement of parts, an example of which is
given in this specification and illustrated in
the accompanying drawings, wherein
Figure 1 is a side elevation of a portion
of the strainer, a portion of the strainer
30 wire being omitted to show the perforated
pipe beneath, a section of which is removed
to show the method of attachment of the
spacers thereto. Fig. 2 is a transverse sec-
tion on the line a-a of Fig. 1, showing, in
35 detail, the spacers, which are partially buried
in the strainer pipe, and are provided for
the purpose of supporting the strainer wires.
Referring now more particularly to the
drawings, wherein like numerals of refer-
40 ence designate similar parts in each of the
figures, the numeral 1 refers to the strainer
pipe which is provided with a plurality of
perforations 2, through which the fluid can
pass to the interior of the pipe.
45 In practice, the pipe is driven, or rotated,
down into the well and the fluid flows or
percolates in through the perforations 2
from the surrounding earth or fluid reser-
voir.
50 In order to prevent the inflowing fluid
from carrying in dirt, sand, gravel etc. it is
necessary to provide a suitable filtering or
straining device which will arrest the move-
ment of the sand and other foreign matter,
55 before it enters the pipe and will not inter-fere, to any serious extent, with the passage
of fluids, such as oil, water or gas.
For the purpose of making provision for
the support of said straining device I have
run V-shaped grooves 3 longitudinally, along 60
the periphery of the pipe 1. A number of
these grooves are necessary, as will become
apparent, hereinafter, but the number of the
grooves and their distance apart will vary
in accordance with the size of the strainer 65
pipe, and the conditions met in the various
wells in which it is to be used.
Spacers 4, whose cross section, may be
triangular, square, diamond shaped or of
some other desirable contour, are partially 70
buried in said grooves, and spacers should
be provided whose under portion will con-
form exactly to the grooves into which they
are designed to fit. The outer portion of
the spacer is designed to project beyond 75
the outer surface of the strainer pipe, and
while this portion may be of any shape, it
should, preferably taper to a thin edge so as
to interfere, as little as possible, with the
passage of the liquid into the pipe. 80
The extremities of each spacer is provided
with an inwardly projecting lug or arm 5,
designed to pass through an opening 6 in
the strainer pipe and to be bent down or
soldered therein. The spacers, thus par- 85
tially buried in the grooves 3 and having
ends secured to the pipe 1 as shown and de-
scribed, cannot be wrenched from their
proper position by the rotation of the screen
in lowering the same into the well, thus 90
providing a screen which overcomes the
prime defect of those now in common use,
and provides spacers capable of being
notched to any desired depth to support the
strainer a proper distance from the pipe 95
surface.
The outer, or sharp edge of the spacers
4 is provided with notches 7 and the notches
of the successive spacers are so disposed,
relative to each other, as to form a spiral 100
groove which is engaged by the strainer
8 presently described.
The strainer 8, to which reference has
just been made, is constructed from a length
of wire which is seated in the notches 7 and 105
the whirls of which are a suitable distance
apart and so disposed, as while permitting
free passage of liquid to the perforations 2
of pipe 1, excludes the passage of sand,
gravel, etc. 110
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Decker, Harry R. Well Screen, patent, December 27, 1910; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth510115/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.