Other Areas
Falling Objects
It’s important to do this inspection to ensure that overhead equipment is properly secured to prevent injuries from falling objects.
Major Components of a Derrick
For more Information: IADC Health, Safety, and Environmental Reference Guide.
Rig Location
List each area of the rig below and check: lights, welds and attachments, safety cables, secured tools, cable or line rubbing, and sheaves. Inspect based on the instructions below and note on the form.
Mast or Derrick
- All lights should be securely mounted and a safety cable attached.
- Counter weight sheaves and hoist line sheaves should be mounted to a dedicated cross member with a 4-part shackle (bolt, nut with keeper pin).
- Chains, wire rope, and soft line used during rig moves should be removed from the derrick to prevent it from becoming fouled in the traveling equipment. Stabbing boards and other work platforms should be securely attached and have a safety cable for both the track and the fold down platform.
- Wooden bumper blocks under the crown should be wrapped in expanded metal to prevent broken pieces from falling to the rig floor.
- Inspect the horizontal girts for tools or materials that may have been left behind following repairs.
Knowledge Check Choose the best answer for the question.
11-1. When inspecting the mast or derrick, make sure sheaves are mounted to a dedicated cross member with a _____.
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