Lift Nubbin
Lift nubbins or lift caps are used for lifting drill pipe or drill collars with catline, winch or crane as the case may be. Lift nubbin has threads matching to the box end of the pipe and a lift handle or bails to be able to fasten a clamp. Once the threaded part of the nubbin is screwed into the box end of the pipe, a clamp is connected to the lift handle of the lift nubbin or cap for lifting the pipe. The clamp could be connected to a sling from catline, winch or a crane to provide required pull.
Lift nubbins or caps are manufactured from a single piece of high quality steel to ensure integrity of the lifting accessory and eliminate risk of failure. Lift caps or nubbins are made as light as possible for handling while still offering the required factor of safety for lifting the load.