| 41. | Arethusa owns a fleet of 14 mobile drilling rigs.
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| 42. | The industry still can't find enough skilled workers and drilling rigs to meet booming demand.
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| 43. | A drilling rig collapsed Thursday afternoon, dumping dozens of workers into the Gulf of Mexico.
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| 44. | In New York, smokestacks and drilling rigs are few but subway and taxi riders many.
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| 45. | The strike began last Wednesday and cut production at drilling rigs, refineries and petrochemical plants.
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| 46. | This has helped cause a shortage of drilling rigs over the last year and half.
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| 47. | Noble owns 46 offshore and 46 land drilling rigs.
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| 48. | The oil boom was over, and there had been a dramatic overbuilding of drilling rigs.
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| 49. | Drilling rigs are carefully monitored for pollution, it said.
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| 50. | Houston-based Pride rents drilling rigs to petroleum exploration companies.
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