round trip: Revision history

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  • curprev 14:5014:50, 26 January 2021 Equinox talk contribs 2,253 bytes +601 # In an oil-drilling operation, the raising, disassembly and replacement of the drilling equipment. #* '''2014''', ‎''Exploring Tech Careers: Fourth Edition'' (page 632), Ferguson Publishing #*: As drilling progresses, the bit gets more and more worn, till eventually it has to be replaced. In order for the bit to be replaced, the whole string has to be lugged up to the surface and taken apart section by section. Once done, the string can be put back together and the bit lowered to the well once undo

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