Tubestar Oil & Gas Services Pvt. Ltd.
Derrick Survey as per API RP 4G


Tubestar has completed numerous inspections for Derrick as per API RP 4G guidelines – which is the recommended practices for use and procedure for inspection, maintenance and repair of drilling and well-servicing structures. Qualified personnel will carry out derrick inspection (Category III) survey in line with API RP 4G. Inspection focuses on load bearing components and members to determine the condition of mast/derrick and substructure. A comprehensive report as per the template of API RP 4G is prepared and submitted to the client with recommendations. Rope access technics complement the inspection for Derrick bolt checks etc.

The thorough inspection process covers:

  • Gin pole construction, including platforms, ladders, braces safety gates, connection plates, bolts and fasteners
  • Upper and lower sections of the derrick stem, including all platforms, ladders, braces safety gates, connection         plates, bolts and fasteners
  • Dolly track, including all Y-frame support beams, beam clamps and joint couplings
  • Dolly carriage guide rails, including upper, middle and lower sections
  • Racking board area, including the support frames, fingers straightness, latches, fingerboard access and all bolts         and fasteners
  • Racking system, including all racking board supports, platforms and system supports
  • Derrick outfitting, including wind walls and any pipewort, such as vent lines or HP mud lines
  • Derrick safety slings and lifting equipment
  • Derrick structure footings
  • Derrick structural general condition
  • Percentage bolt tightness check – if required