The distinguishing feature of the dual-rotary (DR) drill rig is a lower rotary drive, which is used to independently advance casing up to 40 inches, depending on the drill model.
Submersible pump accessories are the plumbing and electrical components of a pumped water
system that are particular to a submersible pump system vs. a jet pump system.
For simplicity’s sake, we will divide them into two categories – down-hole
accessories, and aboveground accessories.