Surface Machinery and Methods for Oil-Well Pumping Page: 117
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MISCELLANEOUS OPERATING EQUIPMENT AND PRACTICE. 117
BELT-HOUSE ROOF RUNWAYS AND LADDERS.
Runways shall extend from sides of derricks to points at least 2 feet beyond
the stirrups at the ends of walking beams. These runways shall be at least
2 feet wide and shall be guarded on both sides by standard two-rail railings,
3j feet high.
Ladders extending from derrick-floor levels to belt-house roof runways shall
The stringers shall be of 2-inch by 4-inch sound lumber, or equivalent.
If Samson post braces be used as ladder stringers, the other ends of rungs
shall be supported by stringers.
Rungs shall be of 1-inch by 4-inch sound lumber, or equivalent, uniformly
spaced not to exceed 16 inches on centers and shall be securely fastened to the
stringers. The length of the ladder rungs (width of ladder) shall be not
less than 12 inches in the clear between stringers.
Secure hand holes shall be provided at the tops of ladders.
To provide safe and easy access to walking beams, steps and hand holes
shall be provided on Samson posts above belt-house roofs.
Every calf-wheel sprocket shall be guarded so that a breaking chain can
not fly into the derrick.
BELT HOUSE FROM ENGINE ROOM TO CALF WHEEL.
In every belt house usedas a runway, the engine drive belt, the band wheel,
the friction pulley, the sprockets and the sprocket chain, the clutch, the calf
wheel, and all other moving mechanisms in the belt house shall be guarded
by a standard two-rail railing 31 feet high, placed not less than 15 nor more
than 18 inches in the clear from said mechanisms and extending from the
engine room to the calf-wheel jackpost.
A stairway or a runway shall be provided at every band wheel so that
workmen can handle the bull rope in safety.
LOOSE, MATERIAL IN DERRICKS.
Tools, machine parts, or material of any kind shall not be kept in a derrick
above the derrick floor, unless there is occasion for their immediate use, and
then adequate precaution shall be taken to prevent their falling on employees
TRAVELING BLOCKS AND HOOKS.
The sheaves of traveling blocks at the points of contact with cables shall be
guarded with suitable housing approved by the Industrial Accident Commission.
Drill pipe, casing, tubing, and sucker-rod hooks shall be provided with
latches to prevent the elevator links and other equipment becoming accidentally
disengaged from the hooks.
The hooks of traveling blocks used in handling casing or drill pipe shall be
equipped with suitable handles.
Counterbalances shall clear the ground or the derrick floor level by not over
5 feet and suitable provision shall be made to prevent them from falling on
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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/m1/152/: accessed July 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.