{"c":"47-5011.00","n":"Derrick Operators, Oil and Gas","d":"Rig derrick equipment and operate pumps to circulate mud or fluid through drill hole.","g":"47","tasks":[{"t":"Inspect derricks, or order their inspection, prior to being raised or lowered.","core":true,"id":9889,"r":80,"dt":"06/2006","src":"Incumbent"},{"t":"Inspect derricks for flaws, and clean and oil derricks to maintain proper working conditions.","core":true,"id":9890,"r":80,"dt":"06/2006","src":"Incumbent"},{"t":"Control the viscosity and weight of the drilling fluid.","core":true,"id":9891,"r":79,"dt":"06/2006","src":"Incumbent"},{"t":"Repair pumps, mud tanks, and related equipment.","core":true,"id":9892,"r":80,"dt":"06/2006","src":"Incumbent"},{"t":"Set and bolt crown blocks to posts at tops of derricks.","core":true,"id":9893,"r":77,"dt":"06/2006","src":"Incumbent"},{"t":"Listen to mud pumps and check regularly for vibration and other problems to ensure that rig pumps and drilling mud systems are working properly.","core":true,"id":9894,"r":80,"dt":"06/2006","src":"Incumbent"},{"t":"Start pumps that circulate mud through drill pipes and boreholes to cool drill bits and flush out drill cuttings.","core":true,"id":9895,"r":78,"dt":"06/2006","src":"Incumbent"},{"t":"Position and align derrick elements, using harnesses and platform climbing devices.","core":true,"id":9896,"r":77,"dt":"06/2006","src":"Incumbent"},{"t":"Supervise crew members, and provide assistance in training them.","core":true,"id":9897,"r":80,"dt":"06/2006","src":"Incumbent"},{"t":"Guide lengths of pipe into and out of elevators.","core":true,"id":9898,"r":81,"dt":"06/2006","src":"Incumbent"},{"t":"Prepare mud reports, and instruct crews about the handling of any chemical additives.","core":true,"id":9899,"r":79,"dt":"06/2006","src":"Incumbent"},{"t":"Clamp holding fixtures on ends of hoisting cables.","core":true,"id":9900,"r":78,"dt":"06/2006","src":"Incumbent"},{"t":"Weigh clay, and mix with water and chemicals to make drilling mud, using portable mixers.","core":true,"id":9901,"r":77,"dt":"06/2006","src":"Incumbent"},{"t":"String cables through pulleys and blocks.","core":true,"id":9902,"r":78,"dt":"06/2006","src":"Incumbent"},{"t":"Steady pipes during connection to or disconnection from drill or casing strings.","core":true,"id":9903,"r":79,"dt":"06/2006","src":"Incumbent"}]}