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Vice hoist for the replacement of the drill pipe or other tools and put sand core tube can also be used for flushing operations.
钻机配有一个主卷扬机、一个副卷扬机。主卷扬机用于升降钻具、下井管等。副卷扬机用于更换钻杆或其他取芯工具及提砂筒，也可用于洗井作业。
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"We wanted the biggest pipe we could have, " says Brian Charkowick, vice president of IT and technical services at Christie's.
CNN: Gigabit Ethernet meets Van Gogh at Christie's
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