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jars

A device used in cable drilling, shaped like two elongated links, attached to the drilling tool, and used to jar the bit on the upward stroke, thus preventing the bit from sticking in the well-bore; also used to increase the impetus of a force exerted to free objects stuck in the well-bore.

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  • ส่วนหนึ่งของคำพูด: noun
  • อุตสาหกรรม/ขอบเขต: Energy
  • Category: Natural gas
  • Company: AGA

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