Top Drive   18 comments

The Top Drive is used to rotate the drill string during the drilling process, the Top Drive is a large motor that is suspended from the derrick of the rig. They can boast at least 1,000 horsepower that turn a shaft to which the drill string is screwed. Replacing the traditional rotary table, the Top Drive lessens the manual labor involved in drilling, as well as many associated risks.


The Top Drive is suspended from a hook below the traveling block, the Top Drive is able to move up and down the derrick.

Chosen both for increased safety and efficiency.

A Top Drive is capable of drilling with three joints stands, instead of just one pipe at a time. Here you can see the 3 joints of drill pipe already connected together on the right of the photo. The large yellow tool to the right of the Top Drive will grab the section of drill pipe top and bottom, the Top Drive will then be lifted to the top of the derrick, this tool will then swivel the drill pipe 180 degrees, the Top Drive will then connect to the top of the drill pipe and screw it into the section of pipe being held at the drill floor, then it all will be lowered to the seabed.

Reducing risk and increasing safety during the drilling process, Top Drives remove much of the manual labor that was previously required to drill wells. On some rigs Top Drives are completely automated, offering rotational control and maximum torque, as well as control over the weight on the bit.

On an offshore rig,(as opposed to a land based rig) the Top Drive travels up and down the vertical rails to avoid the mechanism from swaying with the waves of the ocean.

Posted November 21, 2012 by rigmover in My Work

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18 responses to “Top Drive

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  1. sounds like complicated stuff!

    Our Adventure in Croatia
  2. Mark
    Beautifully described.

  3. Human beings are astonishing, aren’t they?

  4. Another interesting post Mark. The information gleaned stood me in good stead at a cocktail party recently. A couple of engineers (one being my clever brother) were chatting away about off shore drilling and I was able to make a couple of intelligent comments. It set them back on their heels. Thankfully they were so taken back they didn’t notice I kept quiet after that – I knew I was in deep water. Virginia

  5. Thanks for the explanation of how this monster works. You only see them as a speck out In the water. It helps me understand. Nancy

  6. Superb second shot, Mark

  7. It’s nice to hear some of the lingo thrown around again. It’s been a while.

  8. Valuable info. Fortunate me I discovered your site unintentionally, and I am surprised why
    this twist of fate didn’t came about earlier! I bookmarked it.

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