NGWA - Study Guide - Air Rotary NGWA - STUDY GUIDE - AIR ROTARY COMPREHENSIVE AIR ROTARY DRILLING QUESTIONS & ANSWERS

NGWA - Study Guide - Air Rotary ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




NGWA - STUDY GUIDE - AIR ROTARY ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




COMPREHENSIVE AIR ROTARY DRILLING ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




QUESTIONS & ANSWERS ||\\||\\ ||\\||\\




What precautions must be used when sand seams are
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encountered in air rotary drilling in unconsolidated ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




formation? - correct answers ✔✔1. Reduce Air Pressure ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




2. Use of Foam or Polymers
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3. Monitor Cuttings
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4. Casing Advancement
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5. Slow Drilling Rate
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How are samples obtained in air rotary drilling in
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unconsolidated formations? - correct answers ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




✔✔Continuous Sampling of Cuttings: ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




Split-Spoon Sampling ||\\||\\




Drilling Fluids/Polymers ||\\||\\

,Hole cleaning and penetration rates will vary with air
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rotary. What factors affect cleaning and penetration? -
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correct answers ✔✔Air Pressure and Volume ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




Formation Type ||\\||\\




Bit Type and Condition
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Drilling Fluid/Injection ||\\||\\




Drill Pipe Size and Depth
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Cutting Size and Volume ||\\||\\ ||\\||\\ ||\\||\\




Why is information concerning the geology important in
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proper grouting of unconsolidated formations? - correct
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answers ✔✔Permeability of the Formation ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




Stability of the Formation ||\\||\\ ||\\||\\ ||\\||\\




Formation Pressure ||\\||\\




Groundwater Flow ||\\||\\




Formation Composition. ||\\||\\




When would you gravel pack a well? - correct answers
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✔✔When the formation is unconsolidated, to prevent ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\

,sand or fine material from entering the well, and to
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enhance water flow by stabilizing the borehole ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




What formations are best to use a soft tri-cone bit? -
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correct answers ✔✔clay, sand, or shale. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




What functions must a drill pipe perform to drill
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unconsolidated formations? - correct answers ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




✔✔Transmit torque ||\\||\\




circulate drilling fluid/air ||\\||\\ ||\\||\\




support drill string weight ||\\||\\ ||\\||\\ ||\\||\\




maintain borehole integrity ||\\||\\ ||\\||\\




When would you use heavy drill collars? - correct answers
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✔✔to add weight on the bit, stabilize the drill string, and
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prevent buckling in deep or hard formations. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




Explain how chip catchers can aid in formation logging? -
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correct answers ✔✔help collect cuttings for accurate
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, formation logging by preventing loss of samples during ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




drilling, ensuring representative data. ||\\||\\ ||\\||\\ ||\\||\\




How does bit design vary with geology? - correct answers
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✔✔varies by formation hardness, with softer formations ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




needing wider teeth and harder formations requiring ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




tougher, more durable materials. ||\\||\\ ||\\||\\ ||\\||\\




Heavy steel casing would best be used in what rotary
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process? - correct answers ✔✔best used in the air rotary ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




process for stabilizing unconsolidated or collapsing ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




formations.


What air compressor checks must be made daily? - correct
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answers ✔✔Oil level
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filters
belts
air pressure
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