48′ DIAMETER WELL

By Staff
article image
Dale R. Dunbar
Courtesy of Dale R. Dunbar, President, Dunbar Drilling Inc., 307 Broadway, Swanton, Ohio

The picture on the opposite page, taken by Howard E. Krause,
photographer, Waterville, Ohio, is one of two 48′ diameter
wells installed by Dunbar Drilling, Inc., of Swanton, Ohio, for a
large chemical company near Cincinnati, Ohio. Each well was 112
feet deep, and when completed had a capacity of 2,500 gal. per
minute. Each well was equipped with a 30′ diameter Everdur
screen 30 feet in length, and approximately 50 tons of gravel pack
material was installed in each well. These wells were installed by
a reverse rotary drilling machine in a sand and gravel deposit
which underlies the Ohio river adjacent to the well site. The water
level in the wells varies directly with the water level in the
river. Only 40 hours was required to drill a 51′ hole to a
total depth of 112 feet. Approximately 55 cubic yards of material
was removed from each well.

R. F. Dunbar of Delta, Ohio originally started drilling small
farm wells, and from this beginning in 1924 the operations were
expanded with his three Sons, Delbert, Dale and Glenn, now
operating the business on a very large scale.

The company operations have included the areas from New Jersey
to Wisconsin, with all the states between, with well depths ranging
up to 1,000 feet in depth, and up to 5,000 gallons per minute
capacities. The company owns an airplane which is used extensively
by Dale Dunbar in the well drilling operations, there by making it
possible to serve a very large area.

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