18 July 2017

Back off

To unscrew one threaded piece (such as a section of pipe) from another.
18 July 2017

Back up

To hold one section of an object such as pipe while another section is being screwed into or out of it.
25 July 2017

Back-up tong

A tong suspended in the derrick, normally on the driller’s right, used to hold box end of the joint (lower half) while the pin end (upper […]
18 July 2017


A cylindrical steel bar (similar in form to the handle or bail of a bucket, but much larger) that supports the swivel and connects it to […]