Deming graphic. (Deming, N.M.) 1903-1948, 1912-02-09
An Air Tight Well.

from California with the McMati
Bros, Of Vacavillc, Cal, who ar,
experienced we'll driIlcrs. ThcS,
gentlemen have contracts for irri,
cation wells in this vicinity for
each of the following: q. q. Os.
borne, ID. ID. Smith, B. II. Crane.
II. Bcssac, Miss Jennie Gray. Mrs.
Ethel Cooper, Miss Margaret Gray
The big well rig of the McMath
Bros. has been shipped and is cX-
pcctrl every day. The well which
they will put in is called an air
tight well. \ regular drop drill
is used in boring. No casing is put
down until il is absolutely nccrSS-
any. As long aS the hole will stand
up. no casing is inserted. When
the first stratum is encountered, it
is usually necessary to put down
the casing. Twelve inch casing is
used and il is sunk right on through
the Watrr-braring stratum, and the
hole is continued un down. AS be-.
lore until the next water stratum is
encountered IT these two strata
appear strong enough To- furnish the
amount uf water required. a smaller
sized casing say, eight inch, is low.
cred until it rests upon the second
stratum and the top of it is just
above the level of the first stratum.
The larger twclvc-inch casing is
then jarkrd-up until its lower end is
just below the level of the first wat
rr-hcaring stratum, thus leaving ac-
cess for the water from the first
stratum To- the well between the low
81 end of the twelve inch casing and
the upper end of the eight inch cas-
my. The water of the second wat
cr-hcaring stratum is drawn, . +
course. through the length of the
eight inch casing. With the two
Walcr-braring strata thus connected,
the water, Of course, rises in the
we'll from II slight artcSian pressure
which occurs in practically all the
wells of the valley \ pit is then
dug around ihr casing Of sufficient
Si2" to allow the installation Of the
pump, down to- the water level
which, Of course. is somewhat above
the level of the first Watrr.braring
stratum At the water level, the
iwoIl" inch ca>ing is cut and the
pump installed, using the casing be-.
."W rs Il suction, and reducing from
the pump above to the regular
IWrlvc-inch casing above. Thus the
pump forms merely an enlargement
n the tWcIvr-inch casing, the casing
below being the suction and the cas-
ny above being the discharge. In
his type Of well. it will he noticed,
.hrcr things are eliminated: |.
misunderstanding; >. Suction pipe: 3.
The steel PIT. The advantages claim
'd hy the McMath Bros. are the
of the trouble and rX-
,rnSc of the Straincr, the rIimna-
ion ut sand from the well. since the
sand is sucked directly up and out
II the top and has no opportunity to
IIItl through a Strainrr and collect
n the hottom of the we'll, and most
important of all, it forms an air
light well, and hence the pump will
landlr lOO ur ONO gallons, accord
ny to the capacity Of the We |.
With Il suction pipe of an ordinary
irrigation well, the moment the
water pumps down to the bottom If
he suction and the pump gets air,
hat mumcn, Tia water ceases to he
discharged at all. In other words.
with suction pipe, of tn" ordinary
description, Centrifugal pump will
lcHvcr in the nrighborhoud of its
full capacity, or it will deliver moth
ny. To the layman it might ap-
pear that this form of well merely
against an increasing vacuum
md that the limit would soon he
reached. This, however, is not the
'asc, as is pointed out by these we'll
lrillcrS the air pressure col mes.
from where ever the watcr-braring
strata crops out On the surface.
The McMath Bros. say that there ,