• When picking up or setting down drill collar stands larger than 6 1/4" on the floor board, always snub with the air tugger."

    当在钻杆盒上提起放置直径大于6 1/4〞立柱时,一定要气动绞车拉住保安全。

    blog.sina.com.cn

  • Do not make up or break out the bit on a single joint of DC. If this is absolutely necessary, always snub drill collar with the air tugger.

    不要单根钻头如果确实需要这样做气动绞车拉住

    chazidian.com

  • Do not make up or break out the bit on a single joint of DC. If this is absolutely necessary, always snub drill collar with the air tugger.

    不要单根钻头如果确实需要这样做气动绞车拉住

    chazidian.com

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