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  • ...ation fluids to the surface when natural formation pressure is inadequate. Pumps may be mechanical, connected to the surface by sucker rods, or powered hydr
    366 bytes (49 words) - 14:46, 30 January 2018
  • ...ation fluids to the surface when natural formation pressure is inadequate. Pumps may be mechanical, connected to the surface by sucker rods, or powered hydr
    307 bytes (43 words) - 08:32, 28 March 2018