Resources

Current Openings

Derrickman

The derrickman is one of the drill rig crew members who gets his name from the fact that during trips he works on a platform attached to the derrick or mast, typically 85 ft (26 m) above the drill rig floor.

On small land drilling crews, the derrickman is second in rank to the driller. Larger offshore crews may have an assistant driller between the derrickman and the driller.

In a typical trip out of the hole (TOH), the derrickman wears a special derrickman safety harness that enables him to lean out from the work platform (called the monkeyboard) to reach the drillpipe in the center of the derrick or mast, throw a line around the pipe and pull it back into its storage location (the fingerboards) until it is time to run the pipe back into the well. In an emergency, the derrickman can quickly reach the ground by an escape line often called the Geronimo line.



His other job is to handle the mud-processing area during periods of circulation. The derrickman measures mud density and conducts the viscosity test on a regular basis. The derrickman reports to the toolpusher during periods of circulation, but is instructed in detail by the mud engineer on what to add to the mud, how fast and how much.

Derrickmen are employed by drilling and well service contractors and by petroleum producing companies.