The drill stand (of the drilling pipes)

DRILL STAND (EN: drill pipe stand; DE: Gestange-zug; FR: train de sonde, train de tiges; ES: tren de varillas; RU: бурильная свеча) is the part of the drill string, which is not divided during the tripping operations; the drill stand comprises two, three, or four drill pipes, which are screwed together. The usage of the drill stand decreases the time for the tripping operations, and decreases the wear of the mechanisms and tools, which are purposed for the screw-assembly and screw-disassembly of the drill stand. The length of the drill stand is determined according to the height of the derrick of the drilling installation.