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Push levers and brake pedals to control gasoline, diesel, electric, or steam draw works that lower and raise drill pipes and casings in and out of wells.
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Observe pressure gauge and move throttles and levers to control the speed of rotary tables, and to regulate pressure of tools at bottoms of boreholes.
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Monitor progress of drilling operations, and select and change drill bits according to the nature of strata, using hand tools.
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Start and examine operation of slush pumps to ensure circulation and consistency of drilling fluid or mud in well.
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Plug observation wells, and restore sites.
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Bolt together pump and engine parts, and connect tanks and flow lines.
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Weigh clay, and mix with water and chemicals to make drilling mud.
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Remove core samples during drilling to determine the nature of the strata being drilled.
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Position and prepare truck-mounted derricks at drilling areas specified on field maps.
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Maintain records of footage drilled, location and nature of strata penetrated, materials and tools used, services rendered, and time required.
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Maintain and adjust machinery to ensure proper performance.
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Repair or replace defective parts of machinery, such as rotary drill rigs, water trucks, air compressors, and pumps, using hand tools.
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Train crews, and introduce procedures to make drill work more safe and effective.
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Direct rig crews in drilling and other activities, such as setting up rigs and completing or servicing wells.
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Count sections of drill rod to determine depths of boreholes.
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Connect sections of drill pipe, using hand tools and powered wrenches and tongs.
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Cap wells with packers, or turn valves, to regulate outflow of oil from wells.
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Locate and recover lost or broken bits, casings, and drill pipes from wells, using special tools.
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Clean and oil pulleys, blocks, and cables.
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Line drilled holes with pipes, and install all necessary hardware, to prepare new wells.