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APPENDIX A2 <br />OCCUPATION AND WORK PROCESS SCHEDULE <br />WELL DRILL OPERATOR <br />O*NET/SOC CODE: 47-5021.02 RAPIDS CODE: 0629 <br />DESCRIPTION: Sets up and operates portable drilling rig (machine and related equipment) to drill wells: <br />Extends stabilizing jackscrews to support and level drill rig. Moves levers to control power -driven winch that <br />raises and extends telescoping derrick. Bolts trusses to derrick and machine frame. Assembles drilling tools, <br />using handtools or power tools. Moves levers and pedals to raise and lower drill tools and well casing into well <br />bore. Moves levers and pedals and turns handwheels to control action of machine that drills or punches well <br />bore and lowers casing into well. Pours water into well or pumps water or slush into well to cool drill bit and <br />remove drillings. Listens to sounds of drilling machine and feels cable or brake to determine changes in rock <br />formations being penetrated or variations in drilling process. Moves levers to adjust stroke and impact of cable <br />tool drilling machine or changes drill bits of rotary drilling machine according to nature of strata encountered. <br />Replaces drill bit with tool to collect samples of earth or rock being penetrated. Inspects core samples to <br />determine nature of strata encountered or takes samples to laboratory for analysis. Records drilling progress <br />and geological data. Splices worn or broken cable. Fabricates well casings and builds up worn drill bits, using <br />oxyacetylene cutting and welding equipment. Retrieves lost equipment from boreholes, using fishing <br />(specialized retrieval) tools and equipment. May repair drill bits, using forging furnace, hammer, and anvil. <br />May operate well -drilling rig to restore irrigation, industrial and domestic water wells to active production. <br />ON-THE-JOB TRAILING: <br />WORK PROCESS APPROXIMATE HOURS <br />A. <br />Safety and learn various pipe sizes and types <br />200 <br />B. <br />Cutting and threading pipe <br />300 <br />C. <br />Rig lubrication <br />300 <br />D. <br />Maintenance of drilling tools <br />200 <br />E. <br />Care and use of acetylene torch -burning <br />300 <br />F. <br />Set up well drilling equipment <br />1100 <br />G. <br />Start and align well casing <br />200 <br />H. <br />Drive well casing <br />500 <br />I. <br />Rigging <br />150 <br />J. <br />Gas welding <br />150 <br />K. <br />Electric welding <br />100 <br />L. <br />Select and set well strainer according to sand <br />200 <br />M. <br />Take proper samples and recognize formation <br />200 <br />N. <br />Operate machine hydraulic jacks for removing well casing <br />300 <br />O. <br />Pump and develop well after drilling <br />750 <br />P. <br />Take samples for chemical and bacterial tests <br />300 <br />Q. <br />Repair old wells (remove old casings, install new casings, sealing <br />750 <br />TOTAL HOURS 6000 <br />