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Dropped Object Survey & Inspection

Dropped Object Survey & Inspection

Dropped Object Surveys and Inspections are a key element of dropped object control and prevention management systems. Asset personnel will regularly perform dropped object inspections as part of routine maintenance and operational activities.

Large scale Independent Dropped Object Surveys are undertaken periodically, typically by subcontractor personnel to complement the Asset’s dropped object prevention strategy. These surveys provide added assurances that all potential dropped object hazards are identified, assessed and recorded such that control measures and corrective actions can be recommended and implemented within the Asset’s Management System.

Example Inspection Areas

Required inspection areas reflect the established structure of the dropped object management system. Using a typical drilling rig as an example, the asset has been separated into ten individual areas. Areas 1 and 2 represent the drilling derrick and substructure and have been separated further by Equipment Zones. Area 10 captures inspection areas outwith the predefined zones.

It is important to note that all equipment in every Area must be individually identified and inspected separately. For example, each crane must have its own inspection frequency independent of the other cranes.

AREA 1 : Derrick/Mast and Traveling Equipment

  •        Derrick Equipment Zone 1 (A-Frame / Crown / Water Table)
  •        Derrick Equipment Zone 2 (Underside crown to Monkey Board Fingers)
  •        Derrick Equipment Zone 3 (Underside Monkey Board to Rig Floor)
  •        Derrick Equipment Zone 4 (Traveling Block / TDS / Compensator / PRS / PHM / PLS / Iron Roughneck / Guiding arms)

AREA 2 : Substructure

  •        Sub Structure Equipment Zone 5 (Moonpool / Cantilever / BOP Deck / Texas Deck Equipment)

AREA 3 : Main Deck Cranes

  • Crane Equipment (A-Frame / Engine Cab and Access level / Boom and Lifting Equipment)

AREA 4 : Gantry Crane

  •        Crane Equipment (Complete Crane / Pipe Handlers including Truss beams and tracks)

AREA 5 : Knuckle Boom Crane / Pipe Rack Crane

  •        Crane Equipment (Complete knuckle boom crane)

AREA 6 : Jack House and Legs

  •        Jack House Equipment (Top walkway to main deck) Legs

AREA 7 : Raised Catwalks/Conveyors/Walkways

  •        Raised Catwalks / Conveyors / Walkways (Catwalks and Conveyors including Riser Skates and Wireline platforms)

AREA 8 : Communication Masts

  •        Mast Equipment (All Communication Masts and surrounding elevated area)

AREA 9 : Fixed Third Party Equipment

  • Fixed Third Party Equipment (Cement units / Snubbing units / Wireline units / CT Units)

AREA 10 : Other Areas

  •        Any other areas identified by the OIM or shore based rig management team (For example: specific machinery spaces, mud pump room, sack store, engine room, columns, etc.).
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