Front:
Drilling Machine Showing Spudding Operations
12
Bradford Oil Fields
72326
Back:
50
Wyborg Lease Near Derrick City, Pa.
Drilling Machine consists of two principal parts: (1) A
two legged braced mast erected directly over the site
selected for the oil well. (2) A long narrow and com-
paratively low structure which houses the engine, the belt,
a large bandwheel and other mechanism for applying and
controlling power.
This type of machine employs the cable-drilling
system. A churning motion is imparted by means of the
walking beam to the drilling tools which in turn fracture
or abrade the rocky formations which must be penetrated
to reach the oil reservoir.
MADE IN U.S. A.
PUBLISHED BY THOMAS PHOTOGRAPHER, WARREN, PA.
BRADFORD NEWS CO., BRADFORD, PA.
JOBBER
"TICHNOR QUALITY VIEWS" REG. U. S. PAT. OFF. MADE ONLY BY TICHNOR BROS., INC., BOSTON, MASS,
