Set and bolt crown blocks to posts at tops of derricks.

“Set and bolt crown blocks to posts at tops of derricks.” is a core task performed by Derrick Operators, Oil and Gas. Among the occupation's 15 rated tasks, workers place it 11th by importance (#5 most important). About 73% of workers say it is relevant to their job.

This is a single occupation-specific task statement from O*NET. The figures below describe how central the task is to the job and what independent studies measure about AI and this kind of work — not a prediction that the task will be automated.

Work activities this task rolls up to

O*NET groups concrete tasks into broader work activities shared across many occupations.

• Build structures. in Handling and Moving Objects

AI exposure

The OpenAI / Eloundou “GPTs are GPTs” study rates this task E0. No direct exposure — current language models give little or no time savings on this task.

Exposure measures whether a model could meaningfully speed the task up — it is an estimate of overlap with model capabilities, not a measure of whether the work will be done by software. The study's intermediate score (β) for this task is 0.00. Automation potential label: T0.

Other tasks in this occupation

• Inspect derricks, or order their inspection, prior to being raised or lowered. · importance 4.5
• Inspect derricks for flaws, and clean and oil derricks to maintain proper working conditions. · importance 4.5
• Control the viscosity and weight of the drilling fluid. · importance 4.5
• Repair pumps, mud tanks, and related equipment. · importance 4.4
• Listen to mud pumps and check regularly for vibration and other problems to ensure that rig pumps and drilling mud systems are working properly. · importance 4.4
• Start pumps that circulate mud through drill pipes and boreholes to cool drill bits and flush out drill cuttings. · importance 4.2
• Position and align derrick elements, using harnesses and platform climbing devices. · importance 4.2
• Supervise crew members, and provide assistance in training them. · importance 4.2
• Guide lengths of pipe into and out of elevators. · importance 4.2
• Prepare mud reports, and instruct crews about the handling of any chemical additives. · importance 4.1
• Clamp holding fixtures on ends of hoisting cables. · importance 4.0
• Weigh clay, and mix with water and chemicals to make drilling mud, using portable mixers. · importance 4.0
• String cables through pulleys and blocks. · importance 4.0
• Steady pipes during connection to or disconnection from drill or casing strings. · importance 3.8

See all tasks on the Derrick Operators, Oil and Gas page.

Sources for this page

Every figure above traces to a named public dataset and the exact release below — not hand-written opinion. See the full methodology for what each measure does and does not mean.

• O*NET 30.3 U.S. Department of Labor / National Center for O*NET Development
• “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130 OpenAI / academic

Data compiled June 2, 2026. Figures are estimates, not advice.

@misc{singulariki-task-9893,
  title  = {Set and bolt crown blocks to posts at tops of derricks.},
  author = {{Singulariki}},
  year   = {2026},
  note   = {O*NET 30.3; “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130. Accessed June 7, 2026},
  url    = {https://singulariki.com/tasks/task-9893}
}