Surface Machinery and Methods for Oil-Well Pumping Page: 118
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118 SURFACE MACHINERY AND METHODS FOR OIL-WELL PUMPING.
ROTARY DRILLING RIGS.
On both sides of the drawworks, guards of heavy metal shall be provided
for all drive sprockets and chains. These guards shall be strong enough to
withstand the shocks of breaking chains, and shall be so installed that work-
men can not come into contact with moving parts.
The guard for the low-gear drum-drive sprocket and chain next to the
driller shall be flanged with steel plate, so that a breaking chain can not
hit the driler or foul the brake lever.
On every chain-drive rotary, the drive pinion, the shaft, the coupling,
and the bevel gears shall be guarded with metal shields.
The eccentrics of every two-cylinder drilling engine shall be guarded with
suitable metal shields.
The pump end of every rotary hose shall be fastened to the derrick, and
the other end of the hose shall be fastened to the gooseneck, or to the swivel
bail with a chain or with a wire cable.
The key seat and projecting key on every cathead shall be covered with
a smooth thimble.
To support the snapping line and the breaking line, a U bolt, or other
suitable device, shall be set in the jackpost at a point below the cathead.
At every well being drilled with a rotary rig, the walking beam shall be
kept outside of the derrick, except when necessary or expedient to alternate
between rotary and standard methods of drilling.
FLYWHEELS OF ONE-CYLINDE1 ENGINES.
The flywheels of one-cylinder rotary drilling engines shall be so guarded
that employees can not be injured by a bursting wheel or rim.
No engine flywheel shall be weighted with other than the balancing rims
provided for that purpose, and then never in excess of rated capacity.
STEAM-ENGINE STOP VALVES.
Every steam engine shall be equipped with a stop valve installed in the steam
line directly ahead of the engine.
Every platform shall be not less than 3 feet wide. If constructed of metal
gratings, the maximum size of the openings shall be 1 inch by 6 inches.
The outer edges and the ends of every rack, except at the stairways and on
the loading sides of the rack, shall be provided with standard two-rail railings
31/2 feet high.
Stairways shall be provided from the ground to the ends of every rack,
and shall be equipped with handrails, the tops of which shall be 30 inches
vertically above the nose of the tread. The slope of stairways shall not
exceed 50 degrees (119.2 per cent).
OIL AND GAS STORAGE TANKS AND CONTAINERS.
No workman shall be required to enter any tank or other container used for
the storage of crude oil, or any product thereof, or any confined space until it
has been freed from injurious gas, unless he is equipped with suitable breath-
ing apparatus and appurtenances,
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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/m1/153/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.