A comprehensive rig inspection scope typically covers the drilling rig structure, mechanical systems, lifting equipment, pressure-control equipment, electrical systems, and safety-critical equipment. The exact scope depends on whether the inspection is for a drilling contractor, operator, financing transaction, rig acceptance, recertification, or regulatory compliance.

1. Structural Inspection

• Derrick/Mast

• Substructure

• Crown block support structure

• Drill floor structure

• Catwalk and pipe handling structures

• Weld inspection (visual and NDT)

• Corrosion assessment

• Structural integrity review

Standards:

• API RP 4G

• IADC guidelines

2. Hoisting System Inspection

• Derrick/Mast

• Crown block

• Traveling block

• Hook

• Deadline anchor

• Drawworks

• Fast line and deadline

• Drilling line condition

• Sand line system

Typical NDT

• Magnetic Particle Testing (MT)

• Ultrasonic Testing (UT)

• Dye Penetrant Testing (PT)

3. Rotary System Inspection

• Rotary table

• Top Drive System (TDS)

• Swivel

• Kelly drive components (if applicable)

• Torque track systems

• Pipe handling equipment

Top Drive Inspection

• Main gearbox

• Torque bushings

• Link tilt system

• IBOP

• Hydraulic circuits

• Electrical controls

4. Mud Circulation System

• Mud pumps

• Pulsation dampeners

• Standpipe manifold

• Rotary hose

• Mud tanks

• Mixing systems

• Shale shakers

• Degassers

• Desanders/desilters

5. Well Control Equipment

BOP Stack

• Annular preventers

• Ram preventers

• Choke manifold

• Kill manifold

• Hydraulic control unit

Inspection Standards

• API Standard 53

• OEM maintenance requirements

6. Pressure Containment Equipment

• High-pressure piping

• Choke and kill lines

• Standpipe manifold

• Cementing lines

• Valves and fittings

Verification

• Pressure testing

• Wall thickness measurements

• NDT examinations

7. Power Generation Systems

• Diesel engines

• Generators

• SCR/VFD systems

• Engine controls

• Fuel systems

• Cooling systems

8. Electrical Systems

• Main switchgear

• MCC panels

• VFD houses

• Emergency shutdown systems

• Grounding systems

• Hazardous area compliance

Standards

• IEC standards

• ATEX / IECEx requirements

9. Pipe Handling Equipment

• Iron Roughneck

• Catwalk machine

• Pipe racker

• Hydraulic cathead

• Elevator links

• Elevators

• Slips

Many operators require OEM-certified inspection for critical pipe-handling equipment.

10. Safety Equipment

• Emergency stop systems

• Fire detection systems

• Fire suppression systems

• Escape systems

• Lifesaving equipment

• Gas detection systems

11. Documentation Review

• Equipment certificates

• Maintenance records

• Load test certificates

• NDT reports

• Previous inspection reports

• OEM manuals

• Calibration certificates

Common Rig Inspection Deliverables

1. Condition assessment report

2. API RP 4G report

3. NDT report

4. Load-path certification

5. Critical equipment register

6. Repair recommendations

7. Remaining useful life assessment

8. Rig acceptance report

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