Surface Machinery and Methods for Oil-Well Pumping Page: 79
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Plate XIX, B, at a shows a take-off post of heavy braced timber.
To take a well off the power a slotted block is dropped between the
take-off frame and the shoulder on the end of the rod when the
return stroke of the shackle line is completed.
Plate XIX, C, at a shows a heavy timber post concreted in
place with the shackle line running in a hole bored through it.
On the side of the post next to the power a shoulder is welded to
the shackle line; this shoulder moves from the edge of the post
toward the power for a distance equal to the length of stroke. To
take off a well a slotted block of suitable length is dropped over the
rod between the post and the shoulder when the return stroke of
the shackle line is completed.
Plate XX, B, at a shows a take-off post made of old pipe placed
vertically about 2 feet apart in a concrete foundation, with tim-
ber cross-arms bolted to the pipe supports. Wells are taken off
by dropping a slotted wooden block, f, between the take-off post and
the shoulder at the end of the shackle line, as in the type previously
At many wells take-off rods and take-off rails are used instead of
take-off posts, generally when the eccentrics of the power are below
the band wheel or gear wheel, and when the power is in level coun-
try. Under these conditions the take-off rail will support the
shackle lines at the power without hold-ups of the pendulum or
rocker type, and the shackle line will not greatly tend to cut into the
rail. At their inner and lower ends the take-off rods are anchored
to the power foundation and their outer and upper ends extend
through the side of the take-off rail to a point below the take-off
hook. Plate XX, C, shows take-off rods and rail in use. The rod
held up by the man is the connection to the power, and the take-off
hook on the end of the shackle line is shown attached to the stirrup
of the take-off rod; evidently the well is off the power. The man
is seated on the take-off rail, which is made of plank with an out-
side plank facing attached to 8 by 8 inch posts for support. The
top of the rail as shown is about 2 feet above the ground.
Plate XXI, A, shows a power building, a; eccentric disks, b; and
pendulum type of.hold-up frame, c. The hold-up frame is built of
braced timber made rigid by guy wires. A steel take-off, or release
ring, is attached to the framework of the power just below the ec-
centric disks b. Wells are taken off by means of a steel bar with bent
ends; one end of the steel bar is fitted over a shoulder on the
shackle line and, on the return stroke of the well, the other end is
dropped over the release ring.
Plate XXI, B, shows a rocker type of hold-up made from pipe.
The vertical member a and the horizontal member are made from cas-
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George, H. C. Surface Machinery and Methods for Oil-Well Pumping, report, 1925; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc12407/m1/108/: accessed July 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.