We mention substructures (a.k.a. “subs”) a lot on the blog, often in relation to moving or walking systems. Located directly over the well, the substructure raises, lowers and supports the rig floor, derrick and other rig floor components like the drawworks.
A common substructure is the slingshot sub. They begin in a folded position and are then unfolded as hydraulic cylinders or winches raise the rig into place. On a slingshot sub, all rig floor components are installed and rigged up with the floor lowered.
You can find slingshot substructures in action on our blog on Rig 38 and our 3,600 HP 700 series.
What’s your rig word of the day? Let us know in the comments below!
This is the final post in Trinidad’s three-part series on top drives.
Over the last two weeks, we’ve been talking about how top drive technology works and the way it’s changed drilling by making rigs more efficient and allowing operators to reach more sophisticated drilling targets.
This week, we want to talk about one of the most important benefits of top drives: improved safety. Here are four ways top drives are making rig work safer. Continue reading