Derrickman nature of work
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
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
Derrickmen are employed by drilling and well service contractors and by petroleum producing companies.
Derrickman work conditions
The derrickman usually work long hours in all weather conditions on extended roster systems, usually as member
of a crew. In terms of skill, physical exertion and perceived danger, a derrickman has one of the most physically
demanding jobs on the drill rig crew.
Derrickman duties and tasks
The derrickman perform some or all of the following duties:
- Align and manipulate sections of pipe or drill stem from a platform on the rig derrick during the removal
and replacement of strings of pipe, or drill stem and drill bit
- Assist in setting up, taking down and transporting drilling and service rigs
- Operate and maintain drilling rig diesel motors, transmissions, pumps and drilling mud systems, and mix mud
chemicals, cements and additives
- Read gauges to monitor pressure, density, rate and concentration and adjust pumping procedure as
- Record mud flows and volumes and take samples
- Supervise floorhands and laborers
If you are able to meet these requirements and you are motivated to be part of highly motivated team of people
please, apply for the derrickman position through a one of the links below: