| 11. | Today s challenges in ERD are hole cleaning, managing the mechanical loads on the drill string and managing downhole pressure.
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| 12. | Precautions have to be taken to redirect falling drill cuttings away from the machine, and to reinforce the drill string.
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| 13. | Dry drilling can also cause severe damage to the drill string, including snapping the pipe, and the drilling rig itself.
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| 14. | The first commercial deployment of a drill string telemetry network occurred using IntelliServ s product in Myanmar in December 2006.
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| 15. | Retrievable tools, sometimes known as " Slim Tools ", can be retrieved and replaced using wireline through the drill string.
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| 16. | Pulling the drill string out of or running the drill string into the hole is referred to as "'tripping " '.
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| 17. | Pulling the drill string out of or running the drill string into the hole is referred to as "'tripping " '.
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| 18. | In short the longer the gap between the near bit and the drill string stabilizer the greater the angle building rate.
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| 19. | A segment is added by pulling the mousehole ), and then screwing this assembly into the top of the existing drill string.
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| 20. | A good crew can pull a " stand " ( move the drill string up by 90ft ) about every 5 minutes.
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