Dual vertical rackers
18 July 2017Dyna-drill
18 July 2017Dual vertical rackers
18 July 2017Dyna-drill
18 July 2017The portion of a stud or screw which remains in place after the head has been twisted off in an effort to remove the entire stud or screw. Also used to refer to a tool joint pin broken off in the drill-pipe of drill collar box.
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